SSM框架整合 - 码农教程

创建持久层：

在src目录下创造名为com.po的包

package com.po;
/**
 *springtest数据库中user表的持久化类，与持久层关联
 */
public class MyUser {
    private Integer uid;//主键
    private String uname;
    private String usex;
    public Integer getUid() {
        return uid;
    }
    public void setUid(Integer uid) {
        this.uid = uid;
    }
    public String getUname() {
        return uname;
    }
    public void setUname(String uname) {
        this.uname = uname;
    }
    public String getUsex() {
        return usex;
    }
    public void setUsex(String usex) {
        this.usex = usex;
    }
}

创建Dao层

在src创造com.dao包，创造UserDao的接口，该接口使用@Mapper注解自动装配为MyBatis的映射接口：

package com.dao;
import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import com.po.MyUser;
@Repository("userDao")
@Mapper
/*使用Spring自动扫描MyBatis的接口并装配
（Spring将指定包中所有被@Mapper注解标注的接口自动装配为MyBatis的映射接口*/
public interface UserDao {
    /**
     * 接口方法对应SQL映射文件UserMapper.xml中的id
     */
    public List<MyUser> selectUserByUname(MyUser user);
}

创建Service层：

创建com.service的包，创建UserService的接口：

package com.service;
import java.util.List;
import com.po.MyUser;
public interface UserService {
    public List<MyUser> selectUserByUname(MyUser user);
}

创建Conttroller层：

在src目录下创建一个名为com.controller的包，并创建UserController的控制类：

package com.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.dao.UserDao;
import com.po.MyUser;
@Controller
public class UserController {
    @Autowired
    private UserDao userDao;
    @RequestMapping("/select")
    public String select(MyUser user, Model model) {
        List<MyUser> list = userDao.selectUserByUname(user);
        model.addAttribute("userList", list);
        return "userList";
    }
}

创建用户信息显示页面：

在WEB-INF创建文件夹JSP，显示userList.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    用户信息<br>
    <c:forEach items="${userList}" var="user">
        ${user.uid}&nbsp;&nbsp;&nbsp;&nbsp;
        ${user.uname}&nbsp;&nbsp;&nbsp;&nbsp;
        ${user.usex}<br>
    </c:forEach>
</body>
</html>

创建相关配置文件：

web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">    
    <!-- 实例化ApplicationContext容器 -->
    <context-param>
          <!-- 加载src目录下的applicationContext.xml文件 -->
          <param-name>contextConfigLocation</param-name>
          <param-value>
              classpath:applicationContext.xml
          </param-value>
      </context-param>
      <!-- 指定以ContextLoaderListener方式启动Spring容器 -->
      <listener>
          <listener-class>
              org.springframework.web.context.ContextLoaderListener
          </listener-class>
      </listener>
    <!--配置DispatcherServlet -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!-- 避免中文乱码 -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
              <param-name>encoding</param-name>
              <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
              <param-name>forceEncoding</param-name>
              <param-value>true</param-value>
        </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

springmvc-servlet.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    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">
    <!-- 使用扫描机制，扫描包 -->
    <context:component-scan base-package="com.controller" />
    <!-- 配置视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        id="internalResourceViewResolver">
        <!-- 前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

applicationContext.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" 
    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">
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver" />
            <property name="url" value="jdbc:mysql://localhost:3306/springtest?characterEncoding=utf8" />
            <property name="username" value="root" />
            <property name="password" value="root" />
            <!-- 最大连接数 -->
            <property name="maxTotal" value="30"/>
            <!-- 最大空闲连接数 -->
            <property name="maxIdle" value="10"/>
            <!-- 初始化连接数 -->
            <property name="initialSize" value="5"/>
    </bean>
    <!-- 添加事务支持 -->
    <bean id="txManager"   
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">   
        <property name="dataSource" ref="dataSource" />   
    </bean> 
    <!-- 开启事务注解-->
    <tx:annotation-driven transaction-manager="txManager" />
     <!-- 配置MyBatis工厂，同时指定数据源，并与MyBatis完美整合 -->  
     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <property name="dataSource" ref="dataSource" />  
        <!-- configLocation的属性值为MyBatis的核心配置文件 -->
        <property name="configLocation" value="classpath:com/mybatis/mybatis-config.xml"/>
    </bean>  
    <!--Mapper代理开发，使用Spring自动扫描MyBatis的接口并装配
     （Spring将指定包中所有被@Mapper注解标注的接口自动装配为MyBatis的映射接口）  --> 
     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
         <!-- mybatis-spring组件的扫描器 -->
         <property name="basePackage" value="com.dao"/>
         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
     </bean>
     <!-- 指定需要扫描的包（包括子包），使注解生效。dao包在mybatis-spring组件中已经扫描，这里不再需要扫描-->
    <context:component-scan base-package="com.service"/>
</beans>

创建MyBatis的核心配置文件和SQL映射文件：

mybatis-config.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
     <mappers><!-- 映射器，告诉 MyBatis到哪里去找映射文件-->
        <mapper resource="com/mybatis/UserMapper.xml"/>
     </mappers>
</configuration>

创建SQL映射文件UserMapper.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
     <mappers><!-- 映射器，告诉 MyBatis到哪里去找映射文件-->
        <mapper resource="com/mybatis/UserMapper.xml"/>
     </mappers>
</configuration>

创建输入页面input.jsp页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="${pageContext.request.contextPath }/select" method="post">
        输入用户名：<input type="text" name="uname"/><br>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>

原文地址：https://www.cnblogs.com/linchenguang/p/11440542.html