• 详解：整合SSM

    1.搭建spring

            首先创建模板web模板

            pom.xml文件，引入jar包

    1. <properties>
    2.   <spring.version>5.0.2.RELEASE</spring.version>
    3.   <slf4j.version>1.6.6</slf4j.version>
    4.   <log4j.version>1.2.12</log4j.version>
    5.   <mysql.version>5.1.6</mysql.version>
    6.   <mybatis.version>3.4.5</mybatis.version>
    7.   <jackson.version>2.9.4</jackson.version>
    8. </properties>
    9. <dependencies>
    10.   <!--spring-->
    11.   <dependency>
    12.     <groupId>org.aspectj</groupId>
    13.     <artifactId>aspectjweaver</artifactId>
    14.     <version>1.6.8</version>
    15.   </dependency>
    16.   <dependency>
    17.     <groupId>org.springframework</groupId>
    18.     <artifactId>spring-aop</artifactId>
    19.     <version>${spring.version}</version>
    20.   </dependency><dependency>
    21.   <groupId>org.springframework</groupId>
    22.   <artifactId>spring-context</artifactId>
    23.   <version>${spring.version}</version>
    24. </dependency>
    25.   <dependency>
    26.     <groupId>org.springframework</groupId>
    27.     <artifactId>spring-web</artifactId>
    28.     <version>${spring.version}</version>
    29.   </dependency>
    30.   <dependency>
    31.     <groupId>org.springframework</groupId>
    32.     <artifactId>spring-webmvc</artifactId>
    33.     <version>${spring.version}</version>
    34.   </dependency>
    35.   <dependency>
    36.     <groupId>org.springframework</groupId>
    37.     <artifactId>spring-test</artifactId>
    38.     <version>${spring.version}</version>
    39.   </dependency>
    40.   <dependency>
    41.     <groupId>org.springframework</groupId>
    42.     <artifactId>spring-tx</artifactId>
    43.     <version>${spring.version}</version>
    44.   </dependency>
    45.   <dependency>
    46.     <groupId>org.springframework</groupId>
    47.     <artifactId>spring-jdbc</artifactId>
    48.     <version>${spring.version}</version>
    49.   </dependency>
    50.   <dependency>
    51.     <groupId>junit</groupId>
    52.     <artifactId>junit</artifactId>
    53.     <version>4.12</version>
    54.     <scope>test</scope>
    55.   </dependency>
    56.   <dependency>
    57.     <groupId>mysql</groupId>
    58.     <artifactId>mysql-connector-java</artifactId>
    59.     <version>${mysql.version}</version>
    60.   </dependency>
    61.   <dependency>
    62.     <groupId>javax.servlet</groupId>
    63.     <artifactId>servlet-api</artifactId>
    64.     <version>2.5</version>
    65.     <scope>provided</scope>
    66.   </dependency>
    67.   <dependency>
    68.     <groupId>javax.servlet.jsp</groupId>
    69.     <artifactId>jsp-api</artifactId>
    70.     <version>2.0</version>
    71.     <scope>provided</scope>
    72.   </dependency>
    73.   <dependency>
    74.     <groupId>jstl</groupId>
    75.     <artifactId>jstl</artifactId>
    76.     <version>1.2</version>
    77.   </dependency>
    78.   <!--log start-->
    79.   <dependency>
    80.     <groupId>log4j</groupId>
    81.     <artifactId>log4j</artifactId>
    82.     <version>${log4j.version}</version>
    83.   </dependency>
    84.   <dependency>
    85.     <groupId>org.slf4j</groupId>
    86.     <artifactId>slf4j-api</artifactId>
    87.     <version>${slf4j.version}</version>
    88.   </dependency>
    89.   <dependency>
    90.     <groupId>org.slf4j</groupId>
    91.     <artifactId>slf4j-log4j12</artifactId>
    92.     <version>${slf4j.version}</version>
    93.   </dependency>
    94.   <!-- log end-->
    95.   <dependency>
    96.     <groupId>org.mybatis</groupId>
    97.     <artifactId>mybatis</artifactId>
    98.     <version>${mybatis.version}</version>
    99.   </dependency>
    100.   <dependency>
    101.     <groupId>org.mybatis</groupId>
    102.     <artifactId>mybatis-spring</artifactId>
    103.     <version>1.3.0</version>
    104.   </dependency>
    105.   <!--连接池-->
    106.   <dependency>
    107.     <groupId>com.alibaba</groupId>
    108.     <artifactId>druid</artifactId>
    109.     <version>1.1.10</version></dependency>
    110.   <dependency>
    111.     <groupId>org.mybatis.generator</groupId>
    112.     <artifactId>mybatis-generator-core</artifactId>
    113.     <version>1.3.5</version>
    114.   </dependency>
    115.   <dependency>
    116.     <groupId>com.fasterxml.jackson.core</groupId>
    117.     <artifactId>jackson-core</artifactId>
    118.     <version>${jackson.version}</version>
    119.   </dependency>
    120.   <dependency>
    121.     <groupId>com.fasterxml.jackson.core</groupId>
    122.     <artifactId>jackson-databind</artifactId>
    123.     <version>${jackson.version}</version>
    124.   </dependency>
    125.   <dependency>
    126.     <groupId>com.github.pagehelper</groupId>
    127.     <artifactId>pagehelper</artifactId>
    128.     <version>5.1.10</version>
    129.   </dependency>
    130.   <dependency>
    131.     <groupId>cn.hutool</groupId>
    132.     <artifactId>hutool-all</artifactId>
    133.     <version>5.2.3</version>
    134.   </dependency>
    135.   <dependency>
    136.       <groupId>org.thymeleaf</groupId>
    137.       <artifactId>thymeleaf-spring4</artifactId>
    138.       <version>3.0.9.RELEASE</version>
    139.   </dependency>
    140. </dependencies>
    141. <build>
    142.   <finalName>ssm</finalName>
    143.   <pluginManagement>
    144.     <plugins>
    145.       <plugin>
    146.         <groupId>org.apache.maven.plugins</groupId>
    147.         <artifactId>maven-compiler-plugin</artifactId>
    148.         <version>3.2</version>
    149.         <configuration>
    150.           <source>1.8</source>
    151.           <target>1.8</target>
    152.           <encoding>UTF-8</encoding>
    153.           <showWarnings>true</showWarnings>
    154.         </configuration>
    155.       </plugin>
    156.     </plugins>
    157.   </pluginManagement>
    158.   <plugins>
    159.     <plugin>
    160.       <groupId>org.mybatis.generator</groupId>
    161.       <artifactId>mybatis-generator-maven-plugin</artifactId>
    162.       <version>1.3.5</version>
    163.       <!--告诉插件，配置文件所在的位置-->
    164.       <configuration>
    165.         <configurationFile>src/main/resources/mbg.xml</configurationFile>
    166.         <verbose>true</verbose>
    167.         <overwrite>true</overwrite>
    168.       </configuration>
    169.     </plugin>
    170.   </plugins>
    171. </build>

            创建一个model包，在创建一个User实体类 

    1. @Data
    2. public class User {
    3.     private Integer id;
    4.  
    5.     private String username ;
    6.  
    7.     private String password;
    8.  
    9.     private String sex;
    10.  
    11.     private Integer age;
    12. }

            创建一个service包，在创建一个UserService接口

    1. @Service
    2. public interface UserService {
    3.  
    4.     public List findAll();
    5. }

            在service包下创建一个serviceImpl包，在其包下创建一个UserServiceImpl实现类

    1. @Service
    2. public class UserServiceImpl implements UserService {
    3.     @Autowired
    4.     private UserDao userDao;
    5.  
    6.     @Override
    7.     public List findAll(){
    8.         System.out.println("我说service层");
    9.         return this.userDao.findAll();
    10.     }
    11. }

            在resources下创建一个spring.xml

    1. <?xml version="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.        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">
    6.  
    7.  
    8.     <!--开启对注解的扫描-->
    9.     <context:component-scan base-package="com.qcby"></context:component-scan>
    10.  
    11.  
    12.     <!--加载数据库配置文件-->
    13.     <context:property-placeholder location="classpath:jdbc.properties"/>
    14.  
    15.     <!--配置数据库连接池-->
    16.     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    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.     </bean>
    22.  
    23.     <!--spring整合mybatis-->
    24.     <bean id="SqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
    25.         <!--注入数据库连接池-->
    26.         <property name="dataSource" ref="dataSource"/>
    27.  
    28.         <!--扫描entity，配置entity包下类的别名-->
    29.         <property name="typeAliasesPackage" value="com.qcby.model"/>
    30.  
    31.  
    32.         <!--扫描sql配置文件，mapper文件夹中的xml文件-->
    33.         <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    34.     </bean>
    35.  
    36.     <!--配置扫描Dao接口包，动态实现Dao接口，注入到ioc容器-->
    37.     <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    38.         <property name="basePackage" value="com.qcby.dao"/>
    39.     </bean>
    40.  
    41. </beans>

      

    2.搭建SpringMvc

            修改web.xml文件

    1. <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
    2.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3.          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    4.    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    5.  
    6.     <!--不拦截所有是html的页面请求    下面的补充,就是如果是html不会打到DispatcherServlet中-->
    7.     <servlet-mapping>
    8.         <servlet-name>default</servlet-name>
    9.         <url-pattern>*.html</url-pattern>
    10.     </servlet-mapping>
    11.  
    12.     <!--用来表示我们想要访问的标签-->
    13.     <servlet>
    14.         <servlet-name>DispatcherServlet</servlet-name>
    15.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    16.         <!--当一旦有请求过来的时候，初始化springMvc-->
    17.         <init-param>
    18.             <param-name>contextConfigLocation</param-name>
    19.             <param-value>classpath:SpringMvc.xml</param-value>
    20.         </init-param>
    21.     </servlet>
    22.     <!--标识号servlet地址-->
    23.     <servlet-mapping>
    24.         <servlet-name>DispatcherServlet</servlet-name>
    25.         <url-pattern>/</url-pattern>
    26.     </servlet-mapping>
    27.     
    28.     <!--配置开启项目时打开的主页面-->
    29.     <welcome-file-list>
    30.         <welcome-file>/index.html</welcome-file>
    31.     </welcome-file-list>
    32.  
    33.     <filter>
    34.         <filter-name>encodingFilter</filter-name>
    35.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    36.         <async-supported>true</async-supported>
    37.         <init-param>
    38.             <param-name>encoding</param-name>
    39.             <param-value>UTF-8</param-value>
    40.         </init-param>
    41.     </filter>
    42.     <filter-mapping>
    43.         <filter-name>encodingFilter</filter-name>
    44.         <url-pattern>/*</url-pattern>
    45.     </filter-mapping>
    46.     
    47. <!--配置Spring的监听器-->
    48.     <display-name>Archetype Created Web Application</display-name>
    49.     <listener>
    50.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    51.     </listener>
    52.     <!--配置加载类路径的配置文件-->
    53.     <context-param>
    54.         <param-name>contextConfigLocation</param-name>
    55.         <param-value>classpath:Spring.xml</param-value>
    56.     </context-param>
    57.  
    58. </web-app>

            创建一个index.html

    1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <title>首页</title>
    6. </head>
    7. <body>
    8. <a href="/SSMTest/hello" >入门程序</a>
    9.   <h1>我是主页面</h1>
    10. </body>
    11. </html>

            在resources中创建一个SpringMVC.xml

    1. <?xml version="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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    7.  
    8.  
    9.     <!--开启对注解的扫描-->
    10.     <context:component-scan base-package="com.qcby"></context:component-scan>
    11.  
    12.     <!--处理器映射器-->
    13.     <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    14.     <!--处理器适配器-->
    15.     <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
    16.  
    17.     <!--配置视图解析器-->
    18.     <bean id="viewResolver" class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    19.         <property name="order" value="1"/>
    20.         <property name="characterEncoding" value="UTF-8"/>
    21.         <property name="templateEngine" ref="templateEngine"/>
    22.     </bean>
    23.     <!-- templateEngine -->
    24.     <bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine">
    25.         <property name="templateResolver" ref="templateResolver"/>
    26.     </bean>
    27.     <bean id="templateResolver" class="org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver">
    28.         <!--目录-->
    29.         <property name="prefix" value="/html/" />
    30.         <!--后缀名-->
    31.         <property name="suffix" value=".html" />
    32.         <property name="templateMode" value="HTML5"/>
    33.     </bean>
    34.  
    35.     <!-- 配置spring开启注解mvc的支持  默认就是开启的 ，要想让其他组件（不包含映射器、适配器、处理器）生效就必须需要配置了-->
    36.     <mvc:annotation-driven/>
    37. </beans>

            创建一个controller包，里面创建一个UserController类（相当于servlet）

    1. @Controller
    2. public class UserController {
    3.  
    4.     @Autowired
    5.     private UserService userService;
    6.  
    7.     //每个方法也叫作处理器
    8.     /*@RequestMapping("/run")
    9.     public void run(){
    10.  
    11.     }*/
    12.  
    13.  
    14.     /**
    15.      * 处理超链接发出来的请求
    16.      *
    17.      * @param model 模型
    18.      * @return {@link String}
    19.      */
    20.     @RequestMapping(path = "/hello")
    21.     public String sayHello(Model model){
    22.         System.out.println("方法执行了。。。。");
    23.         List<User> accounts = userService.findAll();
    24.         for (User user:accounts
    25.              ) {
    26.             System.out.println(user.toString());
    27.         }
    28.         model.addAttribute("msg","hello,springmvc");
    29.         return "suc";
    30.     }
    31.  
    32. }

            在webapp下创建一个包html，除了index.html，其他所有的html都要放在这个包下，所以在里面创建suc.html

    1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <title>进入</title>
    6. </head>
    7. <body>
    8. <h1>Hello<b th:text="${msg}"></b></h1>
    9. </body>
    10. </html>

    .3.整合mybatis

            先创建一个jdbc.properties

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

            创建dao层，创建一个dao包，创建一个UserDao类

    1. public interface UserDao {
    2.     public List findAll();
    3. }

            在resources创建一个mapper包，在其下创建一个UserDao.xml

    1. "1.0" encoding="UTF-8"?>
    2. mapper
    3.         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    4.         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    5. <mapper namespace="com.qcby.dao.UserDao">
    6.  
    7.     <select id="findAll" resultType="com.qcby.model.User">
    8.         select * from User;
    9.     select>
    10.  
    11. mapper>

            

     

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  • 原文地址：https://blog.csdn.net/weixin_53170971/article/details/126759893