ssm

[TOC]

（SpringMVC+Spring+ mybatis）

配置内容：

• 导入jar插件

• spring 管理连接文件

• sessionFactory 管理session工厂

• dataSource 管理数据源

• MappingScannerCongigurer 管理映射文件

• 实现UserDao属性注入 实现属性注入

具体操作

• spring 管理连接文件

     <bean class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
     <property name="location" value="classpath:db.properties"> </property>
     </bean>

• sessionFactory

<!--创建sessionFactory  -->
     <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
     <property name="dataSource" ref="dataSource"></property>
     <property name="mapperLocations" value="classpath:com/wxb/mapper/*.xml"></property>
     </bean>

• dataSource

     <!-- 数据源 dbcp c3p0  jndi --> 
     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
     <property name="url" value="${url}"></property>
     <property name="username" value="${username}"></property>
     <property name="password" value=""></property>
     <property name="driverClassName" value="${driver}"></property>
     </bean>
     

• MappingScannerCongigurer

 <bean id="mcf" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
      <property name="basePackage" value="com.wxb.dao"></property>
      <property name="sqlSessionFactoryBeanName" value="sessionFactory"></property>
     </bean>

• 实现UserDao属性注入

@Autowired
    private UserDao userDao;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

管理流程

控制层 管理service层

@Autowired
    private UserServiceImp us;

    
    public void setUs(UserServiceImp us) {
        this.us = us;
    }

注意：都需要注解

service层管理dao层

@Autowired
    private UserDao userDao;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

注意：都需要注解

dao层 管理映射文件

public ArrayList<User> list(User user) ;
      
    public void save(User user);
    
    public void update(User user);
    
    public void delete(User user);
    
    public int  count();

通过构造方法同映射文件中的sql语句相关联（方法名）

<mapper namespace="com.wxb.dao.UserDao">
 
  <select id="list" resultType="com.wxb.model.User"  parameterType="com.wxb.model.User" >
  select uid,name from user  
  <where>
  <if test="uid!=0">
     and uid=#{uid}
  </if>
  <if test="null!=name and ''!=name">
     and name like CONCAT('%',#{name},'%')
  </if>
  </where> 
  limit #{pageIndex},#{size}
  </select>


<insert id="save"  parameterType="com.wxb.model.User">
   insert into  user (name) values(#{name})
</insert>
     
<delete id="delete" parameterType="com.wxb.model.User" >
delete from user <include refid="byId"></include>
</delete>    

<update id="update" parameterType="com.wxb.model.User">
update   user set name=#{name} <include refid="byId"></include>
</update>

<select id="count"  resultType="java.lang.Integer">
 select count(*) from user
</select>

<sql id="byId" >
where uid=#{uid}
</sql>
</mapper>

转发到show.jsp 页面

@RequestMapping("/show")
    public String show(HttpServletRequest request, User user) {
        System.out.println("我是show（）方法");
        // String name = request.getParameter("name");
        System.out.println(user.getName());
        request.getSession().setAttribute("name", user.getName());
        return "/show.jsp";

回调show方法

return "redirect:show";

重定向到show.jsp 页面

return "redirect:/show.jsp";

    }