SSM中實現CRUD並配置輸出sql語句
阿新 • • 發佈：2018-12-24
場景
前面SSM的專案整合以及分頁等參照
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/85120936
使用log4j輸出sql語句參照:
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/85159383
專案目錄結構
原始碼下載
https://download.csdn.net/download/badao_liumang_qizhi/10867006
實現
jsp頁面
listUser.jsp
開啟listUser.jsp,新增編輯以及刪除按鈕，以及新增的表單。
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <% pageContext.setAttribute("APP_PATH", request.getContextPath()); %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>查詢所有使用者</title> </head> <script type="text/javascript" src="${APP_PATH }/static/js/jquery-1.12.4.min.js"></script> <link href="${APP_PATH }/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet"> <script src="${APP_PATH }/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script> <body> <table align='center' border='1' cellspacing='0' class="table table-bordered" <th > <td>id</td> <td>name</td> <td>age</td> <td>編輯</td> <td>刪除</td> </th> <c:forEach items="${userList}" var="u"> <tr class="active"> <td >${u.id}</td> <td>${u.name}</td> <td>${u.age}</td> <td><a href="editUser?id=${u.id}">編輯</a></td> <td><a href="deleteUser?id=${u.id}">刪除</a></td> </tr> </c:forEach> </table> <div style="text-align:center"> <a href="?start=0">首 頁</a> <a href="?start=${page.start-page.count}">上一頁</a> <a href="?start=${page.start+page.count}">下一頁</a> <a href="?start=${page.last}">末 頁</a> </div> <form action="addUser" method="post"> <div class="form-group"> <label for="name">使用者名稱</label> <input type="text" class="form-control" id="name" name ="name" placeholder="name"> </div> <div class="form-group"> <label for="age">年齡</label> <input type="number" class="form-control" id="age" name="age" placeholder="age"> </div> <button type="submit" class="btn btn-default">新增使用者</button> </form> </body> </html>
editUser.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.util.*"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <div style="width:500px;margin:0px auto;text-align:center"> <div style="text-align:center;margin-top:40px"> <form method="post" action="updateUser"> 使用者名稱稱： <input name="name" value="${user.name}" type="text"> <br><br> 使用者年齡： <input name="age" value="${user.age}" type="text"> <br><br> <input type="hidden" value="${user.id}" name="id"> <input type="submit" value="編輯使用者"> </form> </div> </div>
點選新增或者編輯或者刪除時都會跳轉到後臺Controller
配置Controller
開啟userController
package com.badao.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.badao.pojo.User;
import com.badao.service.UserService;
import com.badao.util.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
// 告訴spring mvc這是一個控制器類
@Controller
@RequestMapping("")
public class UserController {
@Autowired
UserService userService;
@RequestMapping("listUser")
public ModelAndView listUser(Page page){
ModelAndView mav = new ModelAndView();
//根據分頁物件，進行查詢獲取查詢物件集合
//List<User> cs= userService.selectAllUser(page);
//int total = userService.total();
//根據總數，計算最後一頁的資訊
PageHelper.offsetPage(page.getStart(),5);
List<User> cs= userService.selectAllUser();
int total = (int) new PageInfo<>(cs).getTotal();
page.caculateLast(total);
// 放入轉發引數
mav.addObject("userList", cs);
// 放入jsp路徑
mav.setViewName("listUser");
return mav;
}
@RequestMapping("addUser")
public ModelAndView addUser(User user){
System.out.println(user.getName());
userService.addUser(user);
ModelAndView mav = new ModelAndView("redirect:/listUser");
return mav;
}
@RequestMapping("deleteUser")
public ModelAndView deleteUser(int id){
userService.deleteUser(id);
ModelAndView mav = new ModelAndView("redirect:/listUser");
return mav;
}
@RequestMapping("editUser")
public ModelAndView editUser(User user){
user= userService.selectUser(user.getId());
ModelAndView mav = new ModelAndView("editUser");
mav.addObject("user", user);
return mav;
}
@RequestMapping("updateUser")
public ModelAndView updateUser(User user){
userService.updateUser(user);
ModelAndView mav = new ModelAndView("redirect:/listUser");
return mav;
}
}controller呼叫service方法
配置service
package com.badao.service;
import java.util.List;
import com.badao.pojo.User;
import com.badao.util.Page;
public interface UserService {
List<User> selectAllUser();
User selectUser(Integer id);
void updateUser(User user);
void deleteUser(int id);
void addUser(User user);
//List<User> selectAllUser(Page page);
//int total();
}配置serviceImpl
package com.badao.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.badao.mapper.UserMapper;
import com.badao.pojo.User;
import com.badao.service.UserService;
import com.badao.util.Page;
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
public List<User> selectAllUser() {
// TODO Auto-generated method stub
return userMapper.selectAllUser();
}
/* @Override
public List<User> selectAllUser(Page page) {
// TODO Auto-generated method stub
return userMapper.selectAllUser(page);
}
@Override
public int total() {
// TODO Auto-generated method stub
return userMapper.total();
}*/
@Override
public User selectUser(Integer id) {
// TODO Auto-generated method stub
return userMapper.selectUser(id);
}
@Override
public void updateUser(User user) {
// TODO Auto-generated method stub
userMapper.updateUser(user);
}
@Override
public void deleteUser(int id) {
// TODO Auto-generated method stub
userMapper.deleteUser(id);
}
@Override
public void addUser(User user) {
// TODO Auto-generated method stub
userMapper.addUser(user);
}
}配置mapper
開啟mapper下的usermapper.java
package com.badao.mapper;
import java.util.List;
import com.badao.pojo.User;
import com.badao.util.Page;
public interface UserMapper {
public int addUser(User user);
public User selectUser(int id);
public int updateUser(User user);
public void deleteUser(int id);
public List<User> selectAllUser();
//public List<User> selectAllUser(Page page);
//public int total();
}
開啟mapper下的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="com.badao.mapper.UserMapper">
<insert id="addUser" parameterType="User" >
insert into user ( name,age ) values (#{name},#{age})
</insert>
<delete id="deleteUser" parameterType="_int" >
delete from user where id= #{id}
</delete>
<select id="selectUser" parameterType="_int" resultType="User">
select * from user where id= #{id}
</select>
<update id="updateUser" parameterType="User" >
updateusersetname=#{name},age=#{age} where id=#{id}
</update>
<select id="selectAllUser" resultType="User">
select * from user
<!--<iftest="start!=null and count!=null">
limit #{start},#{count}
</if> -->
</select>
<!-- <select id="total" resultType="int">
select count(*) from user
</select> -->
</mapper>配置POJO
package com.badao.pojo;
public class User {
private Integer id;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}配置web.xml
加入編碼過濾器
<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>完整web.xml程式碼
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<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>
<!-- spring的配置檔案-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- spring mvc核心：分發servlet -->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- spring mvc的配置檔案 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
執行
將原始碼下載下來，或者自己搭建專案，部署到Tomcat嗎，啟動伺服器。
開啟瀏覽器輸入:
http://localhost:8080/ssmJarTemplate/listUser
效果
