• springmvc 03(JSR303和拦截器)

    目录

    一，JSR303

            1.服务端验证

            2.步骤

    二，拦截器

            1.简介

            2.拦截器与过滤器

                    2.1 什么是过滤器

                    2.2 拦截器和过滤器的区别

            3.拦截器案例

                    3.1 使用原理

    一，JSR303

            1.服务端验证

            2.步骤

    1.导入pom.xml配置

    

    org.hibernate
    hibernate-validator
    6.0.7.Final


    1. "1.0" encoding="UTF-8"?>
    2.  
    3. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <modelVersion>4.0.0modelVersion>
    6.  
    7.     <groupId>org.examplegroupId>
    8.     <artifactId>springmvcartifactId>
    9.     <version>1.0-SNAPSHOTversion>
    10.     <packaging>warpackaging>
    11.  
    12.     <name>springmvc Maven Webappname>
    13.     
    14.     <url>http://www.example.comurl>
    15.  
    16.     <properties>
    17.         <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    18.         <maven.compiler.source>1.8maven.compiler.source>
    19.         <maven.compiler.target>1.8maven.compiler.target>
    20.         <maven.compiler.plugin.version>3.7.0maven.compiler.plugin.version>
    21.  
    22.         
    23.         
    24.         <spring.version>5.0.2.RELEASEspring.version>
    25.         
    26.         <mybatis.version>3.4.5mybatis.version>
    27.         
    28.         <mysql.version>5.1.44mysql.version>
    29.         
    30.         <pagehelper.version>5.1.2pagehelper.version>
    31.         
    32.         <mybatis.spring.version>1.3.1mybatis.spring.version>
    33.         
    34.         <commons.dbcp2.version>2.1.1commons.dbcp2.version>
    35.         <commons.pool2.version>2.4.3commons.pool2.version>
    36.         
    37.         <log4j2.version>2.9.1log4j2.version>
    38.         
    39.         <junit.version>4.12junit.version>
    40.         <servlet.version>4.0.0servlet.version>
    41.         <lombok.version>1.18.2lombok.version>
    42.     properties>
    43.  
    44.     <dependencies>
    45.         
    46.         <dependency>
    47.             <groupId>org.springframeworkgroupId>
    48.             <artifactId>spring-contextartifactId>
    49.             <version>${spring.version}version>
    50.         dependency>
    51.         <dependency>
    52.             <groupId>org.springframeworkgroupId>
    53.             <artifactId>spring-ormartifactId>
    54.             <version>${spring.version}version>
    55.         dependency>
    56.         <dependency>
    57.             <groupId>org.springframeworkgroupId>
    58.             <artifactId>spring-txartifactId>
    59.             <version>${spring.version}version>
    60.         dependency>
    61.         <dependency>
    62.             <groupId>org.springframeworkgroupId>
    63.             <artifactId>spring-aspectsartifactId>
    64.             <version>${spring.version}version>
    65.         dependency>
    66.         <dependency>
    67.             <groupId>org.springframeworkgroupId>
    68.             <artifactId>spring-webartifactId>
    69.             <version>${spring.version}version>
    70.         dependency>
    71.         <dependency>
    72.             <groupId>org.springframeworkgroupId>
    73.             <artifactId>spring-testartifactId>
    74.             <version>${spring.version}version>
    75.         dependency>
    76.  
    77.         
    78.         <dependency>
    79.             <groupId>org.mybatisgroupId>
    80.             <artifactId>mybatisartifactId>
    81.             <version>${mybatis.version}version>
    82.         dependency>
    83.         
    84.         <dependency>
    85.             <groupId>mysqlgroupId>
    86.             <artifactId>mysql-connector-javaartifactId>
    87.             <version>${mysql.version}version>
    88.         dependency>
    89.         
    90.         <dependency>
    91.             <groupId>com.github.pagehelpergroupId>
    92.             <artifactId>pagehelperartifactId>
    93.             <version>${pagehelper.version}version>
    94.         dependency>
    95.         
    96.         <dependency>
    97.             <groupId>org.mybatisgroupId>
    98.             <artifactId>mybatis-springartifactId>
    99.             <version>${mybatis.spring.version}version>
    100.         dependency>
    101.  
    102.         
    103.         <dependency>
    104.             <groupId>org.apache.commonsgroupId>
    105.             <artifactId>commons-dbcp2artifactId>
    106.             <version>${commons.dbcp2.version}version>
    107.         dependency>
    108.         <dependency>
    109.             <groupId>org.apache.commonsgroupId>
    110.             <artifactId>commons-pool2artifactId>
    111.             <version>${commons.pool2.version}version>
    112.         dependency>
    113.  
    114.         
    115.         
    116.         <dependency>
    117.             <groupId>org.apache.logging.log4jgroupId>
    118.             <artifactId>log4j-coreartifactId>
    119.             <version>${log4j2.version}version>
    120.         dependency>
    121.         <dependency>
    122.             <groupId>org.apache.logging.log4jgroupId>
    123.             <artifactId>log4j-apiartifactId>
    124.             <version>${log4j2.version}version>
    125.         dependency>
    126.         
    127.         <dependency>
    128.             <groupId>org.apache.logging.log4jgroupId>
    129.             <artifactId>log4j-webartifactId>
    130.             <version>${log4j2.version}version>
    131.         dependency>
    132.  
    133.         
    134.         <dependency>
    135.             <groupId>junitgroupId>
    136.             <artifactId>junitartifactId>
    137.             <version>${junit.version}version>
    138.             <scope>testscope>
    139.         dependency>
    140.         <dependency>
    141.             <groupId>javax.servletgroupId>
    142.             <artifactId>javax.servlet-apiartifactId>
    143.             <version>${servlet.version}version>
    144.             <scope>providedscope>
    145.         dependency>
    146.         <dependency>
    147.             <groupId>org.projectlombokgroupId>
    148.             <artifactId>lombokartifactId>
    149.             <version>${lombok.version}version>
    150.             <scope>providedscope>
    151.         dependency>
    152.  
    153.         
    154.         
    155.         
    156.         
    157.         <dependency>
    158.             <groupId>org.apache.logging.log4jgroupId>
    159.             <artifactId>log4j-coreartifactId>
    160.             <version>2.9.1version>
    161.         dependency>
    162.         <dependency>
    163.             <groupId>org.apache.logging.log4jgroupId>
    164.             <artifactId>log4j-apiartifactId>
    165.             <version>2.9.1version>
    166.         dependency>
    167.         
    168.         <dependency>
    169.             <groupId>org.apache.logging.log4jgroupId>
    170.             <artifactId>log4j-webartifactId>
    171.             <version>2.9.1version>
    172.         dependency>
    173.         <dependency>
    174.             <groupId>org.springframeworkgroupId>
    175.             <artifactId>spring-webmvcartifactId>
    176.             <version>${spring.version}version>
    177.         dependency>
    178.  
    179.         
    180.         <dependency>
    181.             <groupId>javax.servlet.jspgroupId>
    182.             <artifactId>javax.servlet.jsp-apiartifactId>
    183.             <version>2.3.3version>
    184.         dependency>
    185.         <dependency>
    186.             <groupId>jstlgroupId>
    187.             <artifactId>jstlartifactId>
    188.             <version>1.2version>
    189.         dependency>
    190.         <dependency>
    191.             <groupId>taglibsgroupId>
    192.             <artifactId>standardartifactId>
    193.             <version>1.1.2version>
    194.         dependency>
    195.         <dependency>
    196.             <groupId>commons-fileuploadgroupId>
    197.             <artifactId>commons-fileuploadartifactId>
    198.             <version>1.3.3version>
    199.         dependency>
    200.  
    201.         
    202.         <dependency>
    203.             <groupId>org.hibernategroupId>
    204.             <artifactId>hibernate-validatorartifactId>
    205.             <version>6.0.7.Finalversion>
    206.         dependency>
    207.  
    208.     dependencies>
    209.  
    210.     <build>
    211.         <finalName>springmvcfinalName>
    212.         <resources>
    213.             
    214.             <resource>
    215.                 <directory>src/main/javadirectory>
    216.                 <includes>
    217.                     <include>**/*.xmlinclude>
    218.                 includes>
    219.             resource>
    220.             
    221.             <resource>
    222.                 <directory>src/main/resourcesdirectory>
    223.                 <includes>
    224.                     <include>jdbc.propertiesinclude>
    225.                     <include>*.xmlinclude>
    226.                 includes>
    227.             resource>
    228.         resources>
    229.  
    230.         <pluginManagement>
    231.             <plugins>
    232.  
    233.                 <plugin>
    234.                     <groupId>org.apache.maven.pluginsgroupId>
    235.                     <artifactId>maven-compiler-pluginartifactId>
    236.                     <version>${maven.compiler.plugin.version}version>
    237.                     <configuration>
    238.                         <source>${maven.compiler.source}source>
    239.                         <target>${maven.compiler.target}target>
    240.                         <encoding>${project.build.sourceEncoding}encoding>
    241.                     configuration>
    242.                 plugin>
    243.                 <plugin>
    244.                     <groupId>org.mybatis.generatorgroupId>
    245.                     <artifactId>mybatis-generator-maven-pluginartifactId>
    246.                     <version>1.3.2version>
    247.                     <dependencies>
    248.                         
    249.                         <dependency>
    250.                             <groupId>mysqlgroupId>
    251.                             <artifactId>mysql-connector-javaartifactId>
    252.                             <version>${mysql.version}version>
    253.                         dependency>
    254.                     dependencies>
    255.                     <configuration>
    256.                         <overwrite>trueoverwrite>
    257.                     configuration>
    258.                 plugin>
    259.  
    260.                 <plugin>
    261.                     <artifactId>maven-clean-pluginartifactId>
    262.                     <version>3.1.0version>
    263.                 plugin>
    264.                 
    265.                 <plugin>
    266.                     <artifactId>maven-resources-pluginartifactId>
    267.                     <version>3.0.2version>
    268.                 plugin>
    269.                 <plugin>
    270.                     <artifactId>maven-compiler-pluginartifactId>
    271.                     <version>3.8.0version>
    272.                 plugin>
    273.                 <plugin>
    274.                     <artifactId>maven-surefire-pluginartifactId>
    275.                     <version>2.22.1version>
    276.                 plugin>
    277.                 <plugin>
    278.                     <artifactId>maven-war-pluginartifactId>
    279.                     <version>3.2.2version>
    280.                 plugin>
    281.                 <plugin>
    282.                     <artifactId>maven-install-pluginartifactId>
    283.                     <version>2.5.2version>
    284.                 plugin>
    285.                 <plugin>
    286.                     <artifactId>maven-deploy-pluginartifactId>
    287.                     <version>2.8.2version>
    288.                 plugin>
    289.             plugins>
    290.         pluginManagement>
    291.     build>
    292. project>

    再进行其他的配置

     applicationContext-mybatis.xml

    1. "1.0" encoding="UTF-8"?>
    2. <beans xmlns="http://www.springframework.org/schema/beans"
    3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.        xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    5.        xmlns:aop="http://www.springframework.org/schema/aop"
    6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    7.     
    8.     
    9.     <context:annotation-config/>
    10.     
    11.     <context:component-scan base-package="com.ruojuan.ssm"/>
    12.  
    13.     <context:property-placeholder location="classpath:jdbc.properties"/>
    14.  
    15.     <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
    16.           destroy-method="close">
    17.         <property name="driverClassName" value="${jdbc.driver}"/>
    18.         <property name="url" value="${jdbc.url}"/>
    19.         <property name="username" value="${jdbc.username}"/>
    20.         <property name="password" value="${jdbc.password}"/>
    21.         
    22.         <property name="initialSize" value="10"/>
    23.         
    24.         <property name="maxTotal" value="100"/>
    25.         
    26.         <property name="maxIdle" value="50"/>
    27.         
    28.         <property name="minIdle" value="10"/>
    29.         
    30.         
    31.         <property name="maxWaitMillis" value="-1"/>
    32.     bean>
    33.  
    34.     
    35.     
    36.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    37.         
    38.         <property name="dataSource" ref="dataSource"/>
    39.         
    40.         <property name="mapperLocations" value="classpath*:com/ruojuan/ssm/**/mapper/*.xml"/>
    41.         
    42.         <property name="typeAliasesPackage" value="com/ruojuan/ssm/**/model"/>
    43.         
    44.         <property name="plugins">
    45.             <array>
    46.                 <bean class="com.github.pagehelper.PageInterceptor">
    47.                     <property name="properties">
    48.                         <value>
    49.                             helperDialect=mysql
    50.                         value>
    51.                     property>
    52.                 bean>
    53.             array>
    54.         property>
    55.     bean>
    56.  
    57.     
    58.     
    59.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    60.         
    61.         
    62.         
    63.         <property name="basePackage" value="com/ruojuan/ssm/**/mapper"/>
    64.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    65.     bean>
    66.  
    67.     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    68.         <property name="dataSource" ref="dataSource" />
    69.     bean>
    70.     <tx:annotation-driven transaction-manager="transactionManager" />
    71.     <aop:aspectj-autoproxy/>
    72. beans>

    generatorConfig.xml

    1. "1.0" encoding="UTF-8" ?>
    2. generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
    3.         "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
    4. <generatorConfiguration>
    5.     
    6.     <properties resource="jdbc.properties"/>
    7.  
    8.     
    9.     <classPathEntry location="D:\\maven mulu\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>
    10.  
    11.     
    12.     <context id="infoGuardian">
    13.         
    14.         <commentGenerator>
    15.             <property name="suppressAllComments" value="true"/>
    16.             <property name="suppressDate" value="true"/> 
    17.         commentGenerator>
    18.  
    19.         
    20.         <jdbcConnection driverClass="${jdbc.driver}"
    21.                         connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
    22.  
    23.         
    24.         <javaTypeResolver>
    25.             
    26.             <property name="forceBigDecimals" value="false"/>
    27.         javaTypeResolver>
    28.  
    29.         
    30.         
    31.         
    32.         <javaModelGenerator targetPackage="com.ruojuan.ssm.model"
    33.                             targetProject="src/main/java">
    34.             
    35.             <property name="enableSubPackages" value="false"/>
    36.             
    37.             <property name="constructorBased" value="true"/>
    38.             
    39.             <property name="trimStrings" value="false"/>
    40.             
    41.             <property name="immutable" value="false"/>
    42.         javaModelGenerator>
    43.  
    44.         
    45.         <sqlMapGenerator targetPackage="com.ruojuan.ssm.mapper"
    46.                          targetProject="src/main/java">
    47.             
    48.             <property name="enableSubPackages" value="false"/>
    49.         sqlMapGenerator>
    50.  
    51.         
    52.         
    53.         
    54.         
    55.         <javaClientGenerator targetPackage="com.ruojuan.ssm.mapper"
    56.                              targetProject="src/main/java" type="XMLMAPPER">
    57.             
    58.             <property name="enableSubPackages" value="false"/>
    59.         javaClientGenerator>
    60.  
    61.         
    62.         
    63.         
    64.         
    65.         
    66.         
    67.         
    68.         
    69.         
    70.         
    71.         
    72.         
    73.         
    74.  
    75.         
    76.  
    77.         <table schema="" tableName="t_struts_class" domainObjectName="Clazz"
    78.                enableCountByExample="false" enableDeleteByExample="false"
    79.                enableSelectByExample="false" enableUpdateByExample="false">
    80.         table>
    81.  
    82.     context>
    83. generatorConfiguration>
    jdbc.properties
    1. jdbc.driver=com.mysql.jdbc.Driver
    2. jdbc.url=jdbc:mysql://localhost:3306/t280?useUnicode=true&characterEncoding=UTF-8
    3. jdbc.username=root
    4. jdbc.password=123456

     log4j2.xml

    1. "1.0" encoding="UTF-8"?>
    2.  
    4. <Configuration status="WARN" monitorInterval="30">
    5.     <Properties>
    6.         
    7.         <Property name="LOG_HOME">/root/workspace/lucenedemo/logsProperty>
    8.         <property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/errorproperty>
    9.         <property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warnproperty>
    10.         <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%nproperty>
    11.     Properties>
    12.  
    13.     <Appenders>
    14.         
    15.         <Console name="Console" target="SYSTEM_OUT">
    16.             
    17.             <ThresholdFilter level="trace" onMatch="ACCEPT"
    18.                              onMismatch="DENY" />
    19.             
    20.             
    21.             <PatternLayout pattern="${PATTERN}" />
    22.         Console>
    23.  
    24.         
    25.         
    26.         <File name="log" fileName="logs/test.log" append="false">
    27.             <PatternLayout
    28.                     pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
    29.         File>
    30.         
    31.         <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
    32.                      filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
    33.             
    34.             <ThresholdFilter level="info" onMatch="ACCEPT"
    35.                              onMismatch="DENY" />
    36.             <PatternLayout
    37.                     pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
    38.             <Policies>
    39.                 
    40.                 
    41.                 
    42.                 <TimeBasedTriggeringPolicy interval="1"
    43.                                            modulate="true" />
    44.                 
    45.                 
    46.             Policies>
    47.         RollingFile>
    48.  
    49.         <RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
    50.                      filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
    51.             <ThresholdFilter level="warn" onMatch="ACCEPT"
    52.                              onMismatch="DENY" />
    53.             <PatternLayout
    54.                     pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
    55.             <Policies>
    56.                 <TimeBasedTriggeringPolicy />
    57.                 <SizeBasedTriggeringPolicy size="2 kB" />
    58.             Policies>
    59.             
    60.             <DefaultRolloverStrategy max="20" />
    61.         RollingFile>
    62.  
    63.         <RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
    64.                      filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
    65.             <ThresholdFilter level="error" onMatch="ACCEPT"
    66.                              onMismatch="DENY" />
    67.             <PatternLayout
    68.                     pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
    69.             <Policies>
    70.                 
    71.                 <TimeBasedTriggeringPolicy interval="1"
    72.                                            modulate="true" />
    73.                 
    74.             Policies>
    75.         RollingFile>
    76.  
    77.     Appenders>
    78.  
    79.     
    80.     <Loggers>
    81.         
    82.         <logger name="org.springframework" level="INFO">logger>
    83.         <logger name="org.mybatis" level="INFO">logger>
    84.  
    85.         
    86.         <logger name="org.springframework" level="ERROR" />
    87.         <logger name="org.hibernate" level="ERROR" />
    88.         <logger name="org.apache.struts2" level="ERROR" />
    89.         <logger name="com.opensymphony.xwork2" level="ERROR" />
    90.         <logger name="org.jboss" level="ERROR" />
    91.  
    92.  
    93.         
    94.         <root level="all">
    95.             <appender-ref ref="Console" />
    96.             <appender-ref ref="RollingFileInfo" />
    97.             <appender-ref ref="RollingFileWarn" />
    98.             <appender-ref ref="RollingFileError" />
    99.         root>
    100.  
    101.     Loggers>
    102.  
    103. Configuration>

     mybits.cfg.xml

    1. "1.0" encoding="UTF-8"?>
    2. configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
    3. <configuration>
    4.     
    5.     <properties resource="jdbc.properties"/>
    6.  
    7.     <settings>
    8.         <setting name="logImpl" value="LOG4J2"/>
    9.     settings>
    10.  
    11.     
    12.     <typeAliases>
    13.         
    14.     typeAliases>
    15.  
    16.     <plugins>
    17.         
    18.         <plugin interceptor="com.github.pagehelper.PageInterceptor">
    19.         plugin>
    20.     plugins>
    21.  
    22.     
    23.     <environments default="development">
    24.         <environment id="development">
    25.             
    26.             <transactionManager type="jdbc"/>
    27.  
    28.             
    29.             
    30.             
    31.             
    32.             <dataSource type="POOLED">
    33.                 <property name="driver"
    34.                           value="${jdbc.driver}"/>
    35.                 <property name="url"
    36.                           value="${jdbc.url}"/>
    37.                 <property name="username" value="${jdbc.username}"/>
    38.                 <property name="password" value="${jdbc.password}"/>
    39.             dataSource>
    40.         environment>
    41.     environments>
    42.  
    43.  
    44.  
    45.     <mappers>
    46.        <mapper resource="com/ruojuan/ssm/mapper/ClazzMapper.xml"/>
    47.     mappers>
    48. configuration>

    mvc.tld

    1. "1.0" encoding="UTF-8" ?>
    2.  
    3. <taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    4.         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    5.         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    6.         version="2.0">
    7.  
    8.     <description>mvc 1.1 core librarydescription>
    9.     <display-name>mvc coredisplay-name>
    10.     <tlib-version>1.1tlib-version>
    11.     <short-name>mvcshort-name>
    12.     <uri>http://jsp.veryedu.cnuri>
    13.  
    14.  
    15.     <tag>
    16.         <name>pagename>
    17.         <tag-class>com.ruojuan.ssm.tag.PageTagtag-class>
    18.         <body-content>JSPbody-content>
    19.         <attribute>
    20.             <name>pageBeanname>
    21.             <required>truerequired>
    22.             <rtexprvalue>truertexprvalue>
    23.         attribute>
    24.     tag>
    25.  
    26. taglib>

     springmvc-servlet.xml

    1. "1.0" encoding="UTF-8"?>
    2. <beans xmlns="http://www.springframework.org/schema/beans"
    3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.        xmlns:context="http://www.springframework.org/schema/context"
    5.        xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
    6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    7.       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    8.     
    9.     
    10.     <aop:aspectj-autoproxy/>
    11.     <context:component-scan base-package="com.ruojuan.ssm"/>
    12.  
    13.     
    14.     
    15.     
    16.     <mvc:annotation-driven>mvc:annotation-driven>
    17.  
    18.     
    19.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    20.         
    21.         <property name="viewClass"
    22.                   value="org.springframework.web.servlet.view.JstlView">property>
    23.         <property name="prefix" value="/"/>
    24.         <property name="suffix" value=".jsp"/>
    25.     bean>
    26.  
    27.  
    28.  
    29.     
    30.     
    31.     <mvc:resources location="/images/" mapping="/images/**"/>
    32.     
    33.  
    34.     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    35.         
    36.         <property name="defaultEncoding" value="UTF-8">property>
    37.         
    38.         <property name="maxUploadSize" value="52428800">property>
    39.         
    40.         <property name="resolveLazily" value="true"/>
    41.     bean>
    42.  
    43.     
    44.     
    45.  
    46.     
    47.     <mvc:interceptors>
    48.         <mvc:interceptor>
    49.             
    50.             <mvc:mapping path="/**"/>
    51.             <bean class="com.ruojuan.ssm.intercept.OneHandlerInterceptor">bean>
    52.         mvc:interceptor>
    53.         <mvc:interceptor>
    54.             
    55.             <mvc:mapping path="/clz/**"/>
    56.             <bean class="com.ruojuan.ssm.intercept.TwoHandlerInterceptor">bean>
    57.         mvc:interceptor>
    58.     mvc:interceptors>
    59.  
    60.  
    61. beans>

     web.xml

    1. web-app PUBLIC
    2.  "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    3.  "http://java.sun.com/dtd/web-app_2_3.dtd" >
    4.  
    5. <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    6.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    7.          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    8.          version="3.1">
    9.   <display-name>Archetype Created Web Applicationdisplay-name>
    10.   <context-param>
    11.     <param-name>contextConfigLocationparam-name>
    12.     <param-value>classpath:applicationContext.xmlparam-value>
    13.   context-param>
    14.   
    15.   <listener>
    16.     <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    17.   listener>
    18.  
    19.   
    20.   <servlet>
    21.     <servlet-name>SpringMVCservlet-name>
    22.     <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    23.     
    24.     <init-param>
    25.       <param-name>contextConfigLocationparam-name>
    26.       <param-value>/WEB-INF/springmvc-servlet.xmlparam-value>
    27.     init-param>
    28.     <load-on-startup>1load-on-startup>
    29.     
    30.     <async-supported>trueasync-supported>
    31.   servlet>
    32.   <servlet-mapping>
    33.     <servlet-name>SpringMVCservlet-name>
    34.     <url-pattern>/url-pattern>
    35.   servlet-mapping>
    36.  
    37.   
    38.   <filter>
    39.     <filter-name>encodingFilterfilter-name>
    40.     <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
    41.     
    42.     <async-supported>trueasync-supported>
    43.     <init-param>
    44.       <param-name>encodingparam-name>
    45.       <param-value>UTF-8param-value>
    46.     init-param>
    47.   filter>
    48.   <filter-mapping>
    49.     <filter-name>encodingFilterfilter-name>
    50.     <url-pattern>/*url-pattern>
    51.   filter-mapping>
    52. web-app>

    实体类：

    用注解的方式来提示是否输入

     

    Clzz.java实体类

    1. package com.ruojuan.ssm.model;
    2.  
    3. import javax.validation.constraints.NotBlank;
    4. import javax.validation.constraints.NotEmpty;
    5. import javax.validation.constraints.NotNull;
    6.  
    7. /**
    8.  * @NotNull ：作用于基本数据类型
    9.  * @NotEmpty    作用于集合
    10.  * @NotBlank    作用于字符串
    11.  */
    12. public class Clazz {
    13.  
    14.     @NotNull(message = "cid不能为空")
    15.     private Integer cid;
    16.  
    17.     @NotBlank(message = "班级名不能为空")
    18.     private String cname;
    19.  
    20.     @NotBlank(message = "教员老师不能为空")
    21.     private String cteacher;
    22.  
    23.     private String pic;
    24.  
    25.     public Clazz(Integer cid, String cname, String cteacher, String pic) {
    26.         this.cid = cid;
    27.         this.cname = cname;
    28.         this.cteacher = cteacher;
    29.         this.pic = pic;
    30.     }
    31.  
    32.     public Clazz() {
    33.         super();
    34.     }
    35.  
    36.     public Integer getCid() {
    37.         return cid;
    38.     }
    39.  
    40.     public void setCid(Integer cid) {
    41.         this.cid = cid;
    42.     }
    43.  
    44.     public String getCname() {
    45.         return cname;
    46.     }
    47.  
    48.     public void setCname(String cname) {
    49.         this.cname = cname;
    50.     }
    51.  
    52.     public String getCteacher() {
    53.         return cteacher;
    54.     }
    55.  
    56.     public void setCteacher(String cteacher) {
    57.         this.cteacher = cteacher;
    58.     }
    59.  
    60.     public String getPic() {
    61.         return pic;
    62.     }
    63.  
    64.     public void setPic(String pic) {
    65.         this.pic = pic;
    66.     }
    67. }

     控制层ClazzController.java

    1. //    给数据添加服务端校验
    2.     @RequestMapping("/valiAdd")
    3.     public String valiAdd(@Validated Clazz clazz, BindingResult result,HttpServletRequest req){
    4. //        如果服务端验证不通过，有错误
    5.         if(result.hasErrors()){
    6. //            服务端验证了实体类的多个属性，多个属性都没有验证通过
    7.             List fieldErrors = result.getFieldErrors();
    8.             Map map = new HashMap<>();
    9.             for (FieldError fieldError : fieldErrors) {
    10. //                将多个属性的验证失败信息输送到控制台
    11.                 System.out.println(fieldError.getField() + ":" + fieldError.getDefaultMessage());
    12.                 map.put(fieldError.getField(),fieldError.getDefaultMessage());
    13.             }
    14.             req.setAttribute("errorMap",map);
    15.         }else {
    16.             this.clazzBiz.insertSelective(clazz);
    17.             return "redirect:/clz/list";
    18.         }
    19.         return "clzEdit";
    20.     }

     前端代码：

    1. <body>
    2. <%--<form action="${pageContext.request.contextPath }/clz/${empty b ? 'add' : 'edit'}" method="post">--%>
    3. <form action="${pageContext.request.contextPath }/clz/${empty b ? 'valiAdd' : 'edit'}" method="post">
    4.     id:<input type="text" name="cid" value="${b.cid }"><span style="color: red;">${errorMap.cid}span><br>
    5.     cname:<input type="text" name="cname" value="${b.cname }"><span style="color: red;">${errorMap.cname}span><br>
    6.     cteacher:<input type="text" name="cteacher" value="${b.cteacher }"><span style="color: red;">${errorMap.cteacher}span><br>
    7.     <input type="submit">
    8. form>
    9. body>

     效果：

    当你不输入时就提示不能输入空值

     

    二，拦截器

            1.简介

    SpringMVC的处理器拦截器,类似于Servlet开发中的过滤器Filter，用于对处理器进行预处理和后处理。

      依赖于web框架，在实现上基于Java的反射机制，属于面向切面编程（AOP）的一种运用。由于拦截器是基于web框架的调用，因此可以使用Spring的依赖注入（DI）进行一些业务操作，同时一个拦截器实例在一个 
      controller生命周期之内可以多次调用。

            2.拦截器与过滤器

                    2.1 什么是过滤器

        依赖于servlet容器。在实现上基于函数回调，可以对几乎所有请求进行过滤，但是缺点是一个过滤器实例
        只能在容器初始化时调用一次。使用过滤器的目的是用来做一些过滤操作，比如：在过滤器中修改字符编码；
        在过滤器中修改HttpServletRequest的一些参数，包括：过滤低俗文字、危险字符等。

                    2.2 拦截器和过滤器的区别

        过滤器(filter)：

        1) filter属于Servlet技术，只要是web工程都可以使用
        2) filter主要对所有请求过滤
        3) filter的执行时机早于Interceptor

        拦截器(interceptor)

        1) interceptor属于SpringMVC技术，必须要有SpringMVC环境才可以使用
        2) interceptor通常对处理器Controller进行拦截
        3) interceptor只能拦截dispatcherServlet处理的请求

    应用场景

        1）日志记录：记录请求信息的日志，以便进行信息监控、信息统计、计算PV（Page View）等。

        2）权限检查：如登录检测，进入处理器检测是否登录，如果没有直接返回到登录页面；

        3）性能监控：有时候系统在某段时间莫名其妙的慢，可以通过拦截器在进入处理器之前记录开始时间，在处理完后记录结束时间，从而得到该请求的处理时间（如果有反向代理，如apache可以自动记录）；

        4）通用行为：读取cookie得到用户信息并将用户对象放入请求，从而方便后续流程使用，还有如提取Locale、Theme信息等，只要是多个Controller中的处理方法都需要的，我们就可以使用拦截器实现。

            3.拦截器案例

                    3.1 使用原理

    1.   拦截器入门：

    ①创建一个类名为HellController

     

    1. package com.ruojuan.ssm.web;
    2.  
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    5.  
    6. /**
    7.  * @author ruojuan
    8.  * @site 123456999
    9.  * @company 玉渊工作室
    10.  * @create 2022-08-19 16:44
    11.  */
    12. @Controller
    13. public class HellController {
    14.  
    15.         @RequestMapping("/hello")
    16.         public String hello(){
    17.             System.out.println("进入业务方法。。。。");
    18.             return "List";
    19.         }
    20.  
    21. }
     

     
     

    ②再创建一个类为拦截器OneHandlerInterceptor
     

     

    1.  
    2. package com.ruojuan.ssm.intercept;
    3.  
    4. import org.springframework.web.servlet.HandlerInterceptor;
    5. import org.springframework.web.servlet.ModelAndView;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8. import javax.servlet.http.HttpServletResponse;
    9.  
    10. /**
    11.  * @author ruojuan
    12.  * @site 123456999
    13.  * @company 玉渊工作室
    14.  * @create 2022-08-19 16:37
    15.  */
    16.  
    17. public class OneInterceptor implements HandlerInterceptor {
    18.     @Override
    19.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    20.         System.out.println("【OneInterceptor】：preHandle...");
    21.  
    22.         return true;
    23.     }
    24.  
    25.     @Override
    26.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    27.         System.out.println("【OneInterceptor】：postHandle...");
    28.  
    29.     }
    30.  
    31.     @Override
    32.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    33.         System.out.println("【OneInterceptor】：afterCompletion...");
    34.     }
    35. }
    36.  
     

    ③在springmvc-servlet.xml配置拦截器文件
     

     

    1.  
    2.  <mvc:interceptors>
    3.         <bean class="com.ruojuan.ssm.intercept.OneHandlerInterceptor">bean>
    4.     mvc:interceptors>
     

    ④结果
     

     

     
     

    2.拦截器链
     

    ①创建另一个拦截器
     

     

    1.  
    2. package com.ruojuan.ssm.intercept;
    3.  
    4. import org.springframework.web.servlet.HandlerInterceptor;
    5. import org.springframework.web.servlet.ModelAndView;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8. import javax.servlet.http.HttpServletResponse;
    9.  
    10. /**
    11.  * @author ruojuan
    12.  * @site 123456999
    13.  * @company 玉渊工作室
    14.  * @create 2022-08-19 16:37
    15.  */
    16.  
    17. public class OneInterceptor implements HandlerInterceptor {
    18.     @Override
    19.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    20.         System.out.println("【OneInterceptor】：preHandle...");
    21.  
    22.         return true;
    23.     }
    24.  
    25.     @Override
    26.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    27.         System.out.println("【OneInterceptor】：postHandle...");
    28.  
    29.     }
    30.  
    31.     @Override
    32.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    33.         System.out.println("【OneInterceptor】：afterCompletion...");
    34.     }
    35. }
    36.  
     

     

    1. package com.ruojuan.ssm.intercept;
    2.  
    3. import org.springframework.web.servlet.HandlerInterceptor;
    4. import org.springframework.web.servlet.ModelAndView;
    5.  
    6. import javax.servlet.http.HttpServletRequest;
    7. import javax.servlet.http.HttpServletResponse;
    8.  
    9. /**
    10.  * @author ruojuan
    11.  * @site 123456999
    12.  * @company 玉渊工作室
    13.  * @create 2022-08-19 16:47
    14.  */
    15. public class TwoHandlerInterceptor implements HandlerInterceptor {
    16.  
    17.  
    18.     @Override
    19.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    20.         //预处理
    21.         System.out.println("[OneHandlerInterceptor].preHandle");
    22.         return true;
    23.     }
    24.  
    25.     @Override
    26.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    27.         //后处理
    28.         System.out.println("[OneHandlerInterceptor].postHandle");
    29.     }
    30.  
    31.     @Override
    32.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    33.         //完成后处理
    34.         System.out.println("[OneHandlerInterceptor].afterCompletion");
    35.     }
    36. }
     

    ②springmvc-servlet.xml配置文件
     

     

     
     

    1. <mvc:interceptors>
    2.         <mvc:interceptor>
    3.             <mvc:mapping path="/**"/>
    4.             <bean class="com.zking.ssm.interceptor.OneInterceptor">bean>
    5.         mvc:interceptor>
    6.         <mvc:interceptor>
    7.             <mvc:mapping path="/clz/**"/>
    8.             <bean class="com.zking.ssm.interceptor.TwoInterceptor">bean>
    9.         mvc:interceptor>
    10.     mvc:interceptors>
     

    ③
     

     

     
     

     
     

    ④
     

    1. public class OneInterceptor implements HandlerInterceptor {
    2.     @Override
    3.     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    4.         System.out.println("【OneInterceptor】：preHandle...");
    5.         StringBuffer url = request.getRequestURL();
    6.         if (url.indexOf("/login") > 0 || url.indexOf("/logout") > 0){
    7.             //        如果是 登录、退出 中的一种
    8.             return true;
    9.         }
    10. //            代表不是登录，也不是退出
    11. //            除了登录、退出，其他操作都需要判断是否 session 登录成功过
    12.         String uname = (String) request.getSession().getAttribute("uname");
    13.         if (uname == null || "".equals(uname)){
    14.             return false;
    15.         }
    16.         return true;
    17.     }
    18.  
    19.     @Override
    20.     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    21.         System.out.println("【OneInterceptor】：postHandle...");
    22.  
    23.     }
    24.  
    25.     @Override
    26.     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    27.         System.out.println("【OneInterceptor】：afterCompletion...");
    28.     }
    29. }
     

    ⑤
     

    1. @Controller
    2. public class LoginController {
    3.     @RequestMapping("/login")
    4.     public String login(HttpServletRequest req){
    5.         String uname = req.getParameter("uname");
    6.         HttpSession session = req.getSession();
    7.         if ("zs".equals(uname)){
    8.             session.setAttribute("uname",uname);
    9.         }
    10.         return "redirect:/clz/list";
    11.     }
    12.  
    13.     @RequestMapping("/logout")
    14.     public String logout(HttpServletRequest req){
    15.         req.getSession().invalidate();
    16.         return "redirect:/clz/list";
    17.     }
    18. }
     

    ⑥
     

            
    
                
    
                    
    
                
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                    原文地址：https://blog.csdn.net/weixin_67338832/article/details/126431043
                
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