• Java注解式开发

    目录

     

    1. ssm框架的搭建 

    1.1 maven项目的创建

    1.2 导入所需的包到pom.xml文件中

    1.3 导入数据库连接文件、日志文件、redis连接文件

    1.3.1 数据库连接文件

    1.3.2 日志文件

    1.3.3 redis连接文件

    1.4 导入spring-mybatis、spring-mvc、spring-base、spring-redis四种集成文件

    1.4.1 spring-mybatis集成文件

    1.4.2 spring-mvc集成文件

    1.4.3 spring-base集成文件

    1.4.4 spring-redis集成文件

    1.5 导入web.xml

    1.6 导入所需的工具包（util）文件

    ·1.6.1 适用于支持java web应用跨资源源共享（CORS）的首个统一解决方案的文件

    1.6.2 

    1.6.3 处理请求编码问题文件

    1.6.4 继承了感知器

    1.7 运行结果

    2. 获取注解的参数

    1. ssm框架的搭建 

    1.1 maven项目的创建

    注：将jkd版本切换至1.8，web.xml的版本切换至3.1

    1.2 导入所需的包到pom.xml文件中

    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>com.naragroupId>
    8.     <artifactId>ssmdemoartifactId>
    9.     <version>1.0-SNAPSHOTversion>
    10.     <packaging>warpackaging>
    11.  
    12.     <name>ssmdemo 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.     properties>
    21.  
    22.     <dependencies>
    23.         <dependency>
    24.             <groupId>junitgroupId>
    25.             <artifactId>junitartifactId>
    26.             <version>4.12version>
    27.             <scope>testscope>
    28.         dependency>
    29.  
    30.         
    31.         <dependency>
    32.             <groupId>org.springframeworkgroupId>
    33.             <artifactId>spring-contextartifactId>
    34.             <version>5.3.18version>
    35.         dependency>
    36.  
    37.         <dependency>
    38.             <groupId>org.springframeworkgroupId>
    39.             <artifactId>spring-txartifactId>
    40.             <version>5.3.18version>
    41.         dependency>
    42.  
    43.         <dependency>
    44.             <groupId>org.springframeworkgroupId>
    45.             <artifactId>spring-jdbcartifactId>
    46.             <version>5.3.18version>
    47.         dependency>
    48.  
    49.         <dependency>
    50.             <groupId>org.springframeworkgroupId>
    51.             <artifactId>spring-testartifactId>
    52.             <version>5.3.18version>
    53.         dependency>
    54.  
    55.         <dependency>
    56.             <groupId>org.springframeworkgroupId>
    57.             <artifactId>spring-webartifactId>
    58.             <version>5.3.18version>
    59.         dependency>
    60.  
    61.         <dependency>
    62.             <groupId>org.springframeworkgroupId>
    63.             <artifactId>spring-webmvcartifactId>
    64.             <version>5.3.18version>
    65.         dependency>
    66.  
    67.         <dependency>
    68.             <groupId>org.springframeworkgroupId>
    69.             <artifactId>spring-ormartifactId>
    70.             <version>5.3.18version>
    71.         dependency>
    72.  
    73.         <dependency>
    74.             <groupId>org.springframeworkgroupId>
    75.             <artifactId>spring-aspectsartifactId>
    76.             <version>5.3.18version>
    77.         dependency>
    78.  
    79.         
    80.         <dependency>
    81.             <groupId>org.mybatisgroupId>
    82.             <artifactId>mybatisartifactId>
    83.             <version>3.5.6version>
    84.         dependency>
    85.  
    86.         <dependency>
    87.             <groupId>org.mybatisgroupId>
    88.             <artifactId>mybatis-springartifactId>
    89.             <version>2.0.6version>
    90.         dependency>
    91.  
    92.         <dependency>
    93.             <groupId>com.github.pagehelpergroupId>
    94.             <artifactId>pagehelperartifactId>
    95.             <version>5.1.2version>
    96.         dependency>
    97.  
    98.         <dependency>
    99.             <groupId>mysqlgroupId>
    100.             <artifactId>mysql-connector-javaartifactId>
    101.             <version>5.1.44version>
    102.         dependency>
    103.  
    104.         
    105.         <dependency>
    106.             <groupId>org.apache.commonsgroupId>
    107.             <artifactId>commons-dbcp2artifactId>
    108.             <version>2.1.1version>
    109.         dependency>
    110.         <dependency>
    111.             <groupId>org.apache.commonsgroupId>
    112.             <artifactId>commons-pool2artifactId>
    113.             <version>2.4.3version>
    114.         dependency>
    115.  
    116.         
    117.         <dependency>
    118.             <groupId>org.slf4jgroupId>
    119.             <artifactId>slf4j-apiartifactId>
    120.             <version>1.7.36version>
    121.         dependency>
    122.  
    123.         <dependency>
    124.             <groupId>ch.qos.logbackgroupId>
    125.             <artifactId>logback-classicartifactId>
    126.             <version>1.2.10version>
    127.         dependency>
    128.  
    129.         
    130.         <dependency>
    131.             <groupId>redis.clientsgroupId>
    132.             <artifactId>jedisartifactId>
    133.             <version>2.9.0version>
    134.         dependency>
    135.  
    136.         <dependency>
    137.             <groupId>org.springframework.datagroupId>
    138.             <artifactId>spring-data-redisartifactId>
    139.             <version>1.7.2.RELEASEversion>
    140.         dependency>
    141.  
    142.         <dependency>
    143.             <groupId>com.fasterxml.jackson.coregroupId>
    144.             <artifactId>jackson-coreartifactId>
    145.             <version>2.9.4version>
    146.         dependency>
    147.  
    148.         <dependency>
    149.             <groupId>com.fasterxml.jackson.coregroupId>
    150.             <artifactId>jackson-databindartifactId>
    151.             <version>2.9.4version>
    152.         dependency>
    153.  
    154.         
    155.         <dependency>
    156.             <groupId>org.projectlombokgroupId>
    157.             <artifactId>lombokartifactId>
    158.             <version>1.18.22version>
    159.             <scope>providedscope>
    160.         dependency>
    161.  
    162.         <dependency>
    163.             <groupId>javax.servletgroupId>
    164.             <artifactId>javax.servlet-apiartifactId>
    165.             <version>3.1.0version>
    166.             <scope>providedscope>
    167.         dependency>
    168.  
    169.     dependencies>
    170.  
    171.     <build>
    172.         <finalName>ssmdemofinalName>
    173.         <pluginManagement>
    174.             <plugins>
    175.                 <plugin>
    176.                     <artifactId>maven-clean-pluginartifactId>
    177.                     <version>3.1.0version>
    178.                 plugin>
    179.                 
    180.                 <plugin>
    181.                     <artifactId>maven-resources-pluginartifactId>
    182.                     <version>3.0.2version>
    183.                 plugin>
    184.                 <plugin>
    185.                     <artifactId>maven-compiler-pluginartifactId>
    186.                     <version>3.8.0version>
    187.                 plugin>
    188.                 <plugin>
    189.                     <artifactId>maven-surefire-pluginartifactId>
    190.                     <version>2.22.1version>
    191.                 plugin>
    192.                 <plugin>
    193.                     <artifactId>maven-war-pluginartifactId>
    194.                     <version>3.2.2version>
    195.                 plugin>
    196.                 <plugin>
    197.                     <artifactId>maven-install-pluginartifactId>
    198.                     <version>2.5.2version>
    199.                 plugin>
    200.                 <plugin>
    201.                     <artifactId>maven-deploy-pluginartifactId>
    202.                     <version>2.8.2version>
    203.                 plugin>
    204.             plugins>
    205.         pluginManagement>
    206.     build>
    207. project>

    1.3 导入数据库连接文件、日志文件、redis连接文件

    1.3.1 数据库连接文件

    1. jdbc.driver=com.mysql.jdbc.Driver
    2. jdbc.url=jdbc:mysql://localhost:3306/tmpdb?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
    3. jdbc.username=root
    4. jdbc.password=123456

    注：tmpdb是数据库的名称 

    1.3.2 日志文件

    1. "1.0" encoding="UTF-8"?>
    2. <configuration debug="false">
    3.  
    4. 	
    5. 	<property name="LOG_HOME" value="d:\\temp\\mylogs" />
    6. 	
    7. 	<property name="LOG_NAME" value="ssm"/>
    8.  
    9. 	
    10. 	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    11. 		<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
    12. 			
    13. 			<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
    14. 		encoder>
    15. 	appender>
    16.  
    17. 	
    18. 	<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    19. 		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
    20. 			
    21. 			<FileNamePattern>${LOG_HOME}/${LOG_NAME}.%d{yyyy-MM-dd}.logFileNamePattern>
    22. 			
    23. 			<MaxHistory>30MaxHistory>
    24. 		rollingPolicy>
    25. 		<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
    26. 			
    27. 			<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%npattern>
    28. 		encoder>
    29. 		
    30. 		<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
    31. 			<MaxFileSize>10MBMaxFileSize>
    32. 		triggeringPolicy>
    33. 	appender>
    34.  
    35. 	
    36. 	<logger name="com.apache.ibatis" level="TRACE"/>
    37. 	<logger name="java.sql.Connection" level="DEBUG"/>
    38. 	<logger name="java.sql.Statement" level="DEBUG"/>
    39. 	<logger name="java.sql.PreparedStatement" level="DEBUG"/>
    40.  
    41. 	
    42. 	
    43. 	<root level="DEBUG">
    44. 		<appender-ref ref="STDOUT" />
    45. 		<appender-ref ref="FILE"/>
    46. 	root>
    47.  
    48. configuration>

    1.3.3 redis连接文件

    1. redis.host=localhost
    2. redis.port=6379
    3. redis.maxTotal=10
    4. redis.maxIdle=5
    5. redis.testOnBorrow=true

    1.4 导入spring-mybatis、spring-mvc、spring-base、spring-redis四种集成文件

    1.4.1 spring-mybatis集成文件

    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" xmlns:aop="http://www.springframework.org/schema/aop"
    4.        xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    5.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    6. 		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    7. 		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
    8. 		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    9.  
    10.     
    11.     
    12.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    13.         
    14.         <property name="dataSource" ref="dataSource"/>
    15.         
    16.         
    17.         
    18.         <property name="mapperLocations" value="classpath:/mapper/**/*.xml"/>
    19.  
    20.         <property name="plugins">
    21.             <list>
    22.                 <bean class="com.github.pagehelper.PageInterceptor">
    23.                     <property name="properties">
    24.                         
    25.                         <value>
    26.                             helperDialect=mysql
    27.                         value>
    28.                     property>
    29.                 bean>
    30.             list>
    31.         property>
    32.  
    33.     bean>
    34.  
    35.     
    36.     
    37.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    38.         
    39.         
    40.         <property name="basePackage" value="com/zking/**/mapper"/>
    41.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    42.     bean>
    43.  
    44. beans>

    1.4.2 spring-mvc集成文件

    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"
    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">
    8.     
    9.     
    10.     
    11.  
    12.     
    13.     <context:component-scan base-package="com.zking" use-default-filters="false">
    14.         
    15.         
    16.         <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    17.     context:component-scan>
    18.  
    19.     
    20. 	
    21.     
    22.     <mvc:annotation-driven>mvc:annotation-driven>
    23.  
    24.     
    25.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    26.         
    27.         <property name="viewClass"
    28.                   value="org.springframework.web.servlet.view.JstlView">property>
    29.         <property name="prefix" value="/WEB-INF/jsp/"/>
    30.         <property name="suffix" value=".jsp"/>
    31.     bean>
    32.  
    33.     
    34.     <mvc:resources location="/static/" mapping="/static/**" cache-period="31536000"/>
    35.  
    36.     
    37.     <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    38.         <property name="messageConverters">
    39.             <list>
    40.                 <ref bean="mappingJackson2HttpMessageConverter"/>
    41.             list>
    42.         property>
    43.     bean>
    44.  
    45.     
    46.     <bean id="mappingJackson2HttpMessageConverter"
    47.           class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
    48.         
    49.         <property name="supportedMediaTypes">
    50.             <list>
    51.                 <value>text/html;charset=UTF-8value>
    52.                 <value>text/json;charset=UTF-8value>
    53.                 <value>application/json;charset=UTF-8value>
    54.             list>
    55.         property>
    56.     bean>
    57. beans>

    1.4.3 spring-base集成文件

    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" xmlns:aop="http://www.springframework.org/schema/aop"
    4.        xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    5.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    6. 		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
    7. 		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
    8. 		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    9.  
    10.     
    11.     
    12.     
    13.     
    14.     <context:component-scan base-package="com.zking"/>
    15.  
    16.     
    17.     
    18.  
    19.     
    20.     <context:property-placeholder location="classpath:jdbc.properties" ignore-unresolvable="true"/>
    21.     
    22.  
    23.     
    24.     <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
    25.           destroy-method="close">
    26.         <property name="driverClassName" value="${jdbc.driver}"/>
    27.         <property name="url" value="${jdbc.url}"/>
    28.         <property name="username" value="${jdbc.username}"/>
    29.         <property name="password" value="${jdbc.password}"/>
    30.         
    31.         <property name="initialSize" value="10"/>
    32.         
    33.         <property name="maxTotal" value="100"/>
    34.         
    35.         <property name="maxIdle" value="50"/>
    36.         
    37.         <property name="minIdle" value="10"/>
    38.         
    39.         
    40.         <property name="maxWaitMillis" value="-1"/>
    41.  
    42.         <property name="testWhileIdle" value="true">property>
    43.         <property name="validationQuery" value="select 1">property>
    44.  
    45.     bean>
    46.  
    47.  
    48.     
    49.     
    50.     <aop:aspectj-autoproxy expose-proxy="true" proxy-target-class="true"/>
    51.  
    52.     
    53.     <bean id="transactionManager"
    54.           class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    55.         <property name="dataSource" ref="dataSource"/>
    56.     bean>
    57.  
    58.     
    59.     <tx:annotation-driven transaction-manager="transactionManager"/>
    60.  
    61. beans>

    1.4.4 spring-redis集成文件

    1. "1.0" encoding="UTF-8"?>
    2. <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3. 	   xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    4. 	   xmlns:cache="http://www.springframework.org/schema/cache"
    5. 	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd     http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
    6.  
    7. 	
    8.  
    9. 	
    10. 	<context:property-placeholder location="classpath:redis.properties"
    11. 		ignore-unresolvable="true"/>
    12.  
    13. 	
    14. 	<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
    15. 		<property name="maxTotal" value="${redis.maxTotal}" />
    16. 		<property name="maxIdle" value="${redis.maxIdle}" />
    17. 		<property name="testOnBorrow" value="${redis.testOnBorrow}" />
    18. 	bean>
    19.  
    20. 	
    21. 	<bean id="jedisConnectionFactory"
    22. 		class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
    23. 		<property name="hostName" value="${redis.host}">property>
    24. 		<property name="port" value="${redis.port}">property>
    25. 		
    26. 		<property name="poolConfig" ref="poolConfig">property>
    27. 	bean>
    28.  
    29. 	
    30. 	<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
    31. 		<property name="connectionFactory" ref="jedisConnectionFactory" />
    32.  
    33. 		
    34. 		<property name="keySerializer">
    35. 			<bean
    36. 				class="org.springframework.data.redis.serializer.StringRedisSerializer" />
    37. 		property>
    38. 		<property name="valueSerializer">
    39. 			<bean
    40. 				class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer" />
    41. 		property>
    42. 		<property name="hashKeySerializer">
    43. 			<bean
    44. 				class="org.springframework.data.redis.serializer.StringRedisSerializer" />
    45. 		property>
    46. 		<property name="hashValueSerializer">
    47. 			<bean
    48. 				class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer" />
    49. 		property>
    50. 		
    51. 		<property name="enableTransactionSupport" value="true">
    52. 		property>
    53. 	bean>
    54.  
    55. 	
    56. 	<cache:annotation-driven order="2" cache-manager="cacheManager" key-generator="customKeyGenerator"/>
    57.  
    58. 	<bean id="cacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
    59. 		<constructor-arg index="0" ref="redisTemplate">constructor-arg>
    60. 		
    61. 		
    62. 	bean>
    63.  
    64. 	<bean id="customKeyGenerator" class="com.zking.ssmdemo.util.CustomKeyGenerator"/>
    65. beans>

    1.5 导入web.xml

    1. "1.0" encoding="UTF-8"?>
    2. <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    5.          version="3.1">
    6.     
    7.     
    8.     <context-param>
    9.         <param-name>contextConfigLocationparam-name>
    10.         <param-value>classpath*:spring-*.xmlparam-value>
    11.     context-param>
    12.     
    13.     <listener>
    14.         <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    15.     listener>
    16.  
    17.     <filter>
    18.         <filter-name>encodingFilterfilter-name>
    19.         <filter-class>com.zking.ssmdemo.util.EncodingFilterfilter-class>
    20.     filter>
    21.     <filter-mapping>
    22.         <filter-name>encodingFilterfilter-name>
    23.         <url-pattern>/*url-pattern>
    24.     filter-mapping>
    25.  
    26.     <filter>
    27.         <filter-name>corsFilterfilter-name>
    28.         <filter-class>com.zking.ssmdemo.util.CorsFilterfilter-class>
    29.     filter>
    30.     <filter-mapping>
    31.         <filter-name>corsFilterfilter-name>
    32.         <url-pattern>/*url-pattern>
    33.     filter-mapping>
    34.  
    35.     
    36.     <servlet>
    37.         <servlet-name>SpringMVCservlet-name>
    38.         <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    39.         
    40.         <init-param>
    41.             <param-name>contextConfigLocationparam-name>
    42.             <param-value>classpath*:spring-mvc.xmlparam-value>
    43.         init-param>
    44.         
    45.         <load-on-startup>1load-on-startup>
    46.         
    47.         <async-supported>trueasync-supported>
    48.     servlet>
    49.     <servlet-mapping>
    50.         <servlet-name>SpringMVCservlet-name>
    51.         <url-pattern>/url-pattern>
    52.     servlet-mapping>
    53.  
    54. web-app>

    1.6 导入所需的工具包（util）文件

    ·1.6.1 适用于支持java web应用跨资源源共享（CORS）的首个统一解决方案的文件

    1. package com.zking.ssmdemo.util;
    2.  
    3. import javax.servlet.*;
    4. import javax.servlet.http.HttpServletRequest;
    5. import javax.servlet.http.HttpServletResponse;
    6. import java.io.IOException;
    7.  
    8. /**
    9.  * 配置tomcat允许跨域访问
    10.  * 
    11.  * @author Administrator
    12.  *
    13.  */
    14. public class CorsFilter implements Filter {
    15.  
    16. 	@Override
    17. 	public void init(FilterConfig filterConfig) throws ServletException {
    18. 	}
    19.  
    20. 	@Override
    21. 	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
    22. 			throws IOException, ServletException {
    23. 		HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
    24. 		HttpServletRequest req = (HttpServletRequest) servletRequest;
    25. 		// Access-Control-Allow-Origin就是我们需要设置的域名
    26. 		// Access-Control-Allow-Headers跨域允许包含的头。
    27. 		// Access-Control-Allow-Methods是允许的请求方式
    28. 		httpResponse.setHeader("Access-Control-Allow-Origin", "*");// *,任何域名
    29. 		httpResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE");
    30. 		httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,jwt");
    31. 		//允许客户端，处理一个新的响应头jwt
    32. 		httpResponse.setHeader("Access-Control-Expose-Headers", "jwt");
    33. 		
    34. 		// axios的ajax会发两次请求，第一次提交方式为：option，直接返回即可
    35. 		if ("OPTIONS".equals(req.getMethod())) {
    36. 			return;
    37. 		}
    38. 		
    39. 		filterChain.doFilter(servletRequest, servletResponse);
    40. 	}
    41.  
    42. 	@Override
    43. 	public void destroy() {
    44.  
    45. 	}
    46. }

    1.6.2 

    1. package com.zking.ssmdemo.util;
    2.  
    3. import org.springframework.cache.interceptor.KeyGenerator;
    4.  
    5. import java.lang.reflect.Method;
    6.  
    7. public class CustomKeyGenerator implements KeyGenerator {
    8.     @Override
    9.     public Object generate(Object target, Method method, Object... params) {
    10.         StringBuilder sb = new StringBuilder();
    11.         sb.append(target.getClass().getName());
    12.         sb.append(method.getName());
    13.         for(Object param: params) {
    14.             sb.append(param.toString());
    15.         }
    16.         return sb;
    17.     }
    18. }

    1.6.3 处理请求编码问题文件

    1. package com.zking.ssmdemo.util;
    2.  
    3. import javax.servlet.*;
    4. import javax.servlet.http.HttpServletRequest;
    5. import javax.servlet.http.HttpServletResponse;
    6. import java.io.IOException;
    7.  
    8. /**
    9.  * 中文乱码处理
    10.  * 
    11.  */
    12. public class EncodingFilter implements Filter {
    13.  
    14. 	private String encoding = "UTF-8";// 默认字符集
    15.  
    16. 	public EncodingFilter() {
    17. 		super();
    18. 	}
    19.  
    20. 	public void destroy() {
    21. 	}
    22.  
    23. 	public void doFilter(ServletRequest request, ServletResponse response,
    24. 			FilterChain chain) throws IOException, ServletException {
    25. 		HttpServletRequest req = (HttpServletRequest) request;
    26. 		HttpServletResponse res = (HttpServletResponse) response;
    27.  
    28. 		// 中文处理必须放到 chain.doFilter(request, response)方法前面
    29. 		res.setContentType("text/html;charset=" + this.encoding);
    30. 		if (req.getMethod().equalsIgnoreCase("post")) {
    31. 			req.setCharacterEncoding(this.encoding);
    32. 		}
    33.  
    34. 		chain.doFilter(request, response);
    35. 	}
    36.  
    37. 	public void init(FilterConfig filterConfig) throws ServletException {
    38. 		String s = filterConfig.getInitParameter("encoding");// 读取web.xml文件中配置的字符集
    39. 		if (null != s && !s.trim().equals("")) {
    40. 			this.encoding = s.trim();
    41. 		}
    42. 	}
    43.  
    44. }

    1.6.4 继承了感知器

    1. package com.zking.ssmdemo.util;
    2.  
    3. import org.springframework.beans.BeansException;
    4. import org.springframework.context.ApplicationContext;
    5. import org.springframework.context.ApplicationContextAware;
    6. import org.springframework.stereotype.Component;
    7.  
    8. /**
    9.  * @author L
    10.  * @site www.xiaomage.com
    11.  * @company xxx公司
    12.  * @create  2022-11-09 15:40
    13.  */
    14. @Component
    15. public class SpringUtils implements ApplicationContextAware {
    16.  
    17.     private static ApplicationContext ctx;
    18.     @Override
    19.     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    20.         ctx = applicationContext;
    21.     }
    22.  
    23.     public static <T> T getBean(String id) {
    24.         return (T)ctx.getBean(id);
    25.     }
    26. }

    1.7 运行结果

    自定义的注解也有（Mylog AOP。。。）

    2. 获取注解的参数

     value，name两个自定义参数

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  • 原文地址：https://blog.csdn.net/qq_62881798/article/details/127811305