ssm框架整合_SSM框架整合(超详细)

Spring+SpringMVC+Mybatis

Spring负责bean配置和事务,aop等

SpringMVC负责web层逻辑及JSP页面

Mybatis负责持久层逻辑，与数据库进行交互

Mybatis层：

高度集成，降低耦合，Mybatis配置文件存在的必要性越来越小，在Mybatis配置中配置些次重要的配置(别名等等)证明Mybatis确实存在

            typeAliases>

pojo实体类,尽量与数据库中数据字段一致

@Data@AllArgsConstructor@NoArgsConstructorpublic class User {
          private String name;    private String pass;    private int age;}

编写dao层接口

public interface UserMapper {
          //查询全部User    ListqueryAll();    //查询某一User    User queryOne(String name);    //增加一个User    int addOne(User user);    //删除一个User    int delOne(String name);    //修改一个User    int updateOne(User user);}

编写dao层接口的配置文件CRUD

namespace=            select * from ssmbuild;    select>            select * from ssmbuild where name=#{name}    select>    "addOne" parameterType=        insert into ssmbuild(name,pass,age) values(#{name},#{pass},#{age})        ="delOne" parameterType="String">        delete from ssmbuild where name=#{name}        "updateOne" parameterType=        update ssmbuild set pass=#{pass},age=#{age} where name=#{name}    

编写service层接口，和dao层接口一致，service接受请求后调用dao层

编写service层接口的实现类

package com.bj.service;import com.bj.dao.UserMapper;import com.bj.pojo.User;import org.mybatis.spring.SqlSessionTemplate;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Component;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import java.util.List;//@Transactional@Servicepublic class UserServiceImpl implements UserService{
          @Autowired    private UserMapper userMapper;    public ListqueryAll() {
              return userMapper.queryAll();    }    public User queryOne(String name) {
              return userMapper.queryOne(name);    }    public int addOne(User user) {
              return userMapper.addOne(user);    }    public int delOne(String name) {
              return userMapper.delOne(name);    }    public int updateOne(User user) {
              return userMapper.updateOne(user);    }}

Spring配置文件

                                                    bean>                                    bean>                    bean>

配置Spring配置中应用的jdbc.properties属性文件

driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/happusername=rootpassword=1452

配置applicationContext配置，用来集成Spring和Mybatis

    beans>

此时可以编写测试类来测试程序是否能跑起来，在此之前先实现dao层接口实现类

package com.bj.service;import com.bj.dao.UserMapper;import com.bj.pojo.User;import org.mybatis.spring.SqlSessionTemplate;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import org.springframework.stereotype.Component;import java.util.List;@Componentpublic class UserMapperImpl implements UserMapper{
          @Autowired    @Qualifier(value = "sqlSession")    private SqlSessionTemplate sqlSession;    public ListqueryAll() {
              UserMapper mapper = sqlSession.getMapper(UserMapper.class);        List list = mapper.queryAll();        return list;    }}

篇幅原因就只写一个查询全部用户信息的方法

    @Test    public void queryAll(){
              ApplicationContext context=new ClassPathXmlApplicationContext("spring-Dao.xml");        UserMapper userMapperImpl = context.getBean("userMapperImpl", UserMapper.class);        Listlist = userMapperImpl.queryAll();        for (User user : list)        {
                  System.out.println(user);        }    }

测试类加@Test注解

执行结果：

注意,jdbc.properties的编码格式若是gbk，要改为utf-8，否则乱码导致数据库连接失败

SpringMVC层：

在web.xml中配置dispatcherservlet中央处理器及过滤器filter，filter在servlet执行前执行，将字符转为utf-8格式，防止乱码

            springmvcservlet-name>        org.springframework.web.servlet.DispatcherServletservlet-class>                    contextConfigLocationparam-name>            classpath:applicationContext.xmlparam-value>        init-param>        1load-on-startup>    servlet>            springmvcservlet-name>        /url-pattern>    servlet-mapping>            encodingfilter-name>        org.springframework.web.filter.CharacterEncodingFilterfilter-class>                    encodingparam-name>            utf-8param-value>        init-param>    filter>            encodingfilter-name>        /*url-pattern>    filter-mapping>

SpringMVC配置，开启包扫描，注解驱动和视图解析器,并配置前缀后缀

                                    bean>

此时WEB-INF下应有对应的文件夹

配置服务层配置，开启包扫描

保证spring-Dao.xml,service-config.xml,springmvc-servlet.xml在同一目录下

在applicationContext.xml中加入

接下来编写controller程序

package com.bj.controller;import com.bj.pojo.User;import com.bj.service.UserService;import com.sun.org.apache.xpath.internal.operations.Mod;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 java.util.List;@Controllerpublic class UserController {
          @Autowired    private UserService userService;    @RequestMapping("/queryAll")    public String queryAll(Model model){
              List list = userService.queryAll();        model.addAttribute("list", list);        return "queryAll";    }    @RequestMapping("/queryOne")    public String queryOne(Model model,String name){
              User user = userService.queryOne(name);        model.addAttribute("user",user);        return "queryOne";    }    @RequestMapping("/addOne")    public String addOne(User user){
              int i = userService.addOne(user);        if(i>0){
                  return "success";        }        else{
                  return "fail";        }    }    @RequestMapping("/delOne")    public String delOne(String name){
              int i = userService.delOne(name);        if(i>0){
                  return "success";        }        else{
                  return "fail";        }    }}

编写jsp文件，这里只展示增加用户和查询用户

主页：

    查询全部用户a>    
    查询某用户a>    
    增加用户a>    
    删除用户a>

增加页：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>