增删改查的SSM小项目
经过将近一个月的摸索，终于算是勉强完成了关于增删改查的SSM项目。
github源码地址：https://github.com/123456abcdefg/Login
好了，话不多说，写一下具体代码。
实现代码：
1.controller:
登录：
package com.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
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 org.springframework.web.servlet.ModelAndView;
import com.entity.user;
import com.service.userService;
@Controller
@RequestMapping("/admin")
public class userController {
// 注入UserService
@Autowired
private userService userService;
@RequestMapping("/index")
public String index(){
return "index";
}
// 登录
@RequestMapping("/login")
public String login(HttpServletRequest request,String username,String password){
user user =userService.getUser(username,password);
ModelAndView modelandview = new ModelAndView();
modelandview.addObject(user);
if(user.getIdent().equals("1"))
return "redirect:/admin/user/userlist.action";
else
return "redirect:/admin/index.action";
}
@RequestMapping("/error")
public String error(){
return "error";
}
}
userlistController：
package com.controller;
import java.util.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
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 org.springframework.web.servlet.ModelAndView;
import com.entity.user;
import com.service.userService;
@Controller
@RequestMapping("/admin/user")
public class userlistController {
// 注入UserService
@Autowired
private userService userService;
@RequestMapping("/userlist")
public ModelAndView userlist(HttpServletRequest request,Integer search){
user user = new user();
user.setId(search);
List<user> userlist = userService.findUserList(user);
ModelAndView modelandview = new ModelAndView();
modelandview.addObject("userlist",userlist);
modelandview.setViewName("login");
return modelandview;
}
//新增页面
@RequestMapping("/add")
public String add(HttpServletRequest request){
return "add_do";
}
//增加用户
@RequestMapping("/add_do")
public String add_do(HttpServletRequest request,
String username,String password,String ident){
user user = new user();
user.setUsername(username);
user.setPassword(password);
user.setIdent(ident);
userService.addUser(user);
return "forward:userlist.action";
}
//删除用户
@RequestMapping("/delete_do")
public String delete_do(HttpServletRequest request,Integer id){
userService.deleteUser(id);
return "forward:userlist.action";
}
//修改页面
@RequestMapping("/update")
public ModelAndView update(Integer id){
ModelAndView modelandview = new ModelAndView();
user user=userService.getUserById(id);
modelandview.addObject(user);
modelandview.setViewName("add_do");
return modelandview;
}
//修改用户信息
@RequestMapping("/update_do")
public String update_do(HttpServletRequest request,Integer id,String username,String password,String ident){
user user = new user();
user.setId(id);
user.setUsername(username);
user.setPassword(password);
user.setIdent(ident);
userService.updateUser(user);
return "forward:userlist.action";
}
}
2.user:
package com.entity;
import java.util.List;
public class user {
private Integer id;
private String username;
private String password;
private String ident;
public String getIdent() {
return ident;
}
public void setIdent(String ident) {
this.ident = ident;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
3.mapper:
package com.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import com.entity.user;
public interface userMapper {
public user getUser(String username,String password);
public List<user> findUserList(user user);
public void addUser(user user);
public void deleteUser(Integer id);
public user getUserById(Integer id);
public void updateUser(user user);
}
mapper.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.mapper.userMapper">
<resultMap type="com.entity.user" id="userMapper">
<id column="id" property="id" jdbcType="INTEGER" />
<result column="username" property="username" jdbcType="VARCHAR"/>
<result column="password" property="password" jdbcType="VARCHAR"/>
<result column="ident" property="ident" jdbcType="VARCHAR"/>
</resultMap>
<select id="getUser" parameterType="com.entity.user" resultType="com.entity.user">
select *
from user
where username=#{0} and password=#{1}
</select>
<select id="findUserList" parameterType="com.entity.user" resultType="com.entity.user">
select *
from user
where 1=1 and id like '%${id}%'
</select>
<insert id="addUser" parameterType="com.entity.user">
insert into user
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="id != null">
id,
</if>
<if test="username != null">
username,
</if>
<if test="password != null">
password,
</if>
<if test="ident != null">
ident,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="id != null">
#{id,jdbcType=INTEGER},
</if>
<if test="username != null">
#{username,jdbcType=VARCHAR},
</if>
<if test="password != null">
#{password,jdbcType=VARCHAR},
</if>
<if test="ident != null">
#{ident,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<delete id="deleteUser" parameterType="com.entity.user">
delete
from user
where id=#{id,jdbcType=INTEGER}
</delete>
<select id="getUserById" parameterType="com.entity.user" resultType="com.entity.user">
select *
from user
where id=#{id}
</select>
<update id="updateUser" parameterType="com.entity.user">
update user
<set>
<if test="username != null">
username = #{username,jdbcType=VARCHAR},
</if>
<if test="password != null">
password = #{password,jdbcType=VARCHAR},
</if>
<if test="ident != null">
ident = #{ident,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
4.service:
userService：
package com.service;
import java.util.List;
import com.entity.user;
public interface userService {
public user getUser(String username,String password);
public List<user> findUserList(user user);
public void addUser(user user);
public void deleteUser(Integer id);
public user getUserById(Integer id);
public void updateUser(user user);
}
userServiceimp：
package com.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import com.entity.user;
import com.mapper.userMapper;
public class userServiceimp implements userService{
// 注入User
@Autowired
private userMapper usermapper;
@Override
public user getUser(String username,String password){
return usermapper.getUser(username,password);
}
@Override
public List<user> findUserList(user user){
return usermapper.findUserList(user);
}
@Override
public void addUser(user user){
usermapper.addUser(user);
}
@Override
public void deleteUser(Integer id){
usermapper.deleteUser(id);
}
@Override
public user getUserById(Integer id){
return usermapper.getUserById(id);
}
@Override
public void updateUser(user user){
usermapper.updateUser(user);
}
}
剩下的配置文件我就不粘了，大家可以去我github上下载源码查看。
登陆页面：
登陆成功页面： 
新增 页面：
大致就是这样了，实现了基本的增删改查操作，以后要是写出好的项目也会同样放在github上，欢迎大家下载讨论。
项目就先告一段落了，接下来的任务就是把SSM从头到尾看一遍，彻底搞懂SSM框架具体怎么实现。
