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【汇智学堂】-SSM整合入门(根据条件查询记录-2)

作者:互联网

index.jsp

<%--
  Created by IntelliJ IDEA.
  User: soft
  Date: 2019/7/10
  Time: 8:14
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>SSM框架整合入门-查询</title>
  </head>
  <body>
  查询数据库一条记录的测试
  </body>
</html>

input.jsp

<%--
  Created by IntelliJ IDEA.
  User: soft
  Date: 2019/7/13
  Time: 13:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>查询测试</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>

userList.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: soft
  Date: 2019/7/13
  Time: 13:54
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</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}&nbsp;&nbsp;&nbsp;&nbsp;<br>
   </c:forEach>

</body>
</html>

MyUser类

package com.po;

public class MyUser {
    private Integer uid;
    private String uname;
    private String usex;

   set get略

    @Override
    public String toString(){//为了方便查看结果,重写了toString方法
        return "User [uid="+uid+",uname="+uname+",usex="+usex+"]";
    }
}

UserController

package com.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.po.MapUser;
import com.po.SelectUserParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import com.dao.UserDao;
import com.po.MyUser;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@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";
    }
}

UserDao

package com.dao;

import com.po.MapUser;
import com.po.MyUser;
import com.po.SelectUserParam;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;
import java.util.Map;

@Repository("userDao")//Spring 自 2.0 版本开始,陆续引入了一些注解用于简化 Spring 的开发。@Repository注解便属于最先引入的一批,它用于将数据访问层 (DAO 层 ) 的类标识为 Spring Bean。具体只需将该注解标注在 DAO类上即可。同时,为了让 Spring 能够扫描类路径中的类并识别出 @Repository 注解,需要在 XML 配置文件中启用Bean 的自动扫描功能
@Mapper
/*
使用Spring自动扫描MyBatis的接口并装配
 */
public interface UserDao {

    /*
    接口方法对应SQL映射文件UserMapper.xml中的ID
     */

    public MyUser selectUserById(Integer uid);


    /*
    使用Map的查询方法
     */
   /* public List<MyUser> selectAllUser(Map<String,Object> param);*/
    /*
    直接查询
     */
    /*public List<MyUser> selectAllUser();*/

    /*
    使用JavaBean查询
     */

    public List<MyUser> selectAllUser(SelectUserParam param);

    public int addUser(MyUser user);
    public int updateUser(MyUser user);
    public int deleteUser(Integer integer);

    public List<MapUser> selectResultMap();

    public List<MyUser> selectUserByUname(MyUser user);
}

标签:入门,MyUser,List,汇智,SSM,nbsp,import,com,public
来源: https://blog.csdn.net/weixin_39593940/article/details/95774478