SSM框架整合

最新推荐文章于 2024-09-23 16:30:37 发布

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最新推荐文章于 2024-09-23 16:30:37 发布

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分类专栏：框架文章标签：框架 spring springmvc mybatis

本文链接：https://blog.youkuaiyun.com/qq_39654446/article/details/78044585

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本文介绍了一个基于Spring、Spring MVC及MyBatis（SSM）框架整合的具体实现案例，包括了UserController类处理请求、UserImpl类操作数据以及相关配置文件的详细说明。

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SSM框架整合

UserController.java

package ssm;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class UserController {
	//不用注解就要在spring中获取bean创建的对象去调用
	ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("ssm_xml/ApplicationContest.xml");
    private UserImpl ui =(UserImpl) ctx.getBean("user");
    	
    @RequestMapping(value="/hello2.do")
    public ModelAndView find(HttpServletRequest request){
    	String id = request.getParameter("id");	
    	Map map=ui.findById(id);
        System.out.println(map);
        ModelAndView mv = new ModelAndView();
        //这里使用ModelAndView对象可以向前台传值，
        mv.addObject("map",map);
        //设置键值对json
        mv.setViewName("hello");
        //向hello页面返回一个mv对象的值
        return mv;
    }
}

UserImpl.java

package ssm;

import java.util.Map;

import org.mybatis.spring.SqlSessionTemplate;

public class UserImpl {
	
	 //注入以后就可以直接使用sqlsession  
    private SqlSessionTemplate sqlsession;  
    public void setSqlsession(SqlSessionTemplate sqlsession) {  
        this.sqlsession = sqlsession; 
    }
    
	public Map findById(String id){  
		Map map = sqlsession.selectOne("UserMapper.findById", id);  
		System.out.println(map);//获取到数据map集合
		return map;  
	}
	
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="UserMapper">

    <select id="findById" parameterType="String" resultType="java.util.Map">
        select * from d_user WHERE id=#{id} 
    </select>
</mapper>

ApplicationContest.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:p="http://www.springframework.org/schema/p"
    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-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <!-- 1. 数据源 : DriverManagerDataSource -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/zdy" />
        <property name="username" value="root" />
        <property name="password" value="1111" />
    </bean>
    
        <!-- 获取会话工厂，并注入Mybatis，和dateSource数据库链接 -->  
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <property name="dataSource" ref="dataSource"></property>  
        <property name="configLocation" value="classpath:ssm_xml/mybatis-config.xml"></property>  
    </bean>  
      
        <!-- 在会话工厂中取出SqlSessionTemplate这个对象 -->  
     <bean id="sqlsessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">  
        <constructor-arg index="0" ref="sqlSessionFactory" />  
    </bean>  
          
        <!-- 把sqlsessionTemplate注入到UserImpl中去。UserImpl才能对数据进行操作 -->  
    <bean id="user" class="ssm.UserImpl">  
    <property name="sqlsession" ref="sqlsessionTemplate">  
    </property>  
    </bean>  

</beans>

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD SQL Map Config 3.0//EN"  
	"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<mappers>
		<mapper resource="ssm/UserMapper.xml" />
			<!-- 连接配置文件 -->
	</mappers>
</configuration>

spring-mvc.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:mvc="http://www.springframework.org/schema/mvc"
    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-4.0.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!-- 注解扫描包 -->
    <context:component-scan base-package="ssm" />

    <!-- 开启注解 -->
    <mvc:annotation-driven />

    <!-- 定义跳转的文件的前后缀 ，视图模式配置-->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 -->
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

hello.jsp

<%@ 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="hello2.do" method="post">
    hello:<input type="text" name="id"/>
    <input type="submit" value="提交" /> 
</form>
<!-- 用el来接收mv传上来的值 -->
${map}
</body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <welcome-file-list>
    <welcome-file>hello.jsp</welcome-file>
  </welcome-file-list>
    <!-- 加载Spring容器配置 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener> 

    <!-- 设置Spring容器加载所有的配置文件的路径 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:ssm_xml/applicationContext.xml</param-value>
    </context-param>

    <!-- 配置SpringMVC核心控制器 -->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:ssm_xml/spring-mvc.xml</param-value>
        </init-param>
        <!-- 启动加载一次 -->  
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!--为DispatcherServlet建立映射 -->
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <!-- 此处可以可以配置成*.do -->
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <!-- 防止Spring内存溢出监听器 -->
     <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener> 
    
    <!-- 解决工程编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

数据库内容

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