首先搭建一个Maven工程，配置好Tomcat，mybatis等
tb_role
tb_user
user_role(这里只给了第一个用户管理员限权，可以对其他用户添加管理员，必须要用第一个用户登录)
这三个就不用多说了，直接按照数据库字段的打。
为了实现分页功能，我们需要引入一个类叫PageInfo，代码如下
package com.zhongruan.bean;
import java.util.List;
public class PageInfo<T> {
private List<T> list;
private int totalPage;
private int size;
private int totalCount;
private int currentPage;
public List<T> getList() {
return list;
}
public void setList(List<T> list) {
this.list = list;
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
@Override
public String toString() {
return "PageInfo{" +
"list=" + list +
", totalPage=" + totalPage +
", size=" + size +
", totalCount=" + totalCount +
", currentPage=" + currentPage +
'}';
}
}
我们需要用到两个Dao，一个是用于用户表的增删改查，另外一个是用于角色表的增删改查
package com.zhongruan.dao;
import com.zhongruan.bean.Role;
import com.zhongruan.bean.UserRole;
import java.util.List;
public interface RoleDao {
List<Integer> findRoleIdByUserId(int userId);
List<Role> findRoleByUserId(int id);
void addRole(UserRole userRole);
}
package com.zhongruan.dao;
import com.zhongruan.bean.User;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface UserDao {
User findUserByUserName(String username);
List<User> findAll(@Param("start") int start,@Param("username") String username);
void deleteById(int id);
void add(User user);
User selectById(int id);
void update(User user);
int getTotalCount(@Param("username")String username);
void deleteAll(@Param("ids") List<Integer> ids);
}
同样两个service接口和两个实现类
接口：
package com.zhongruan.service;
import com.zhongruan.bean.Role;
import com.zhongruan.bean.UserRole;
import java.util.List;
public interface IRoleService {
List<Integer> findRoleId(int userId);
List<Role> findRoleByUserId(int id);
void add(List<Integer> ids, String userId);
}
package com.zhongruan.service;
import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.User;
import java.util.List;
public interface IUserService {
int login(String username,String password);
PageInfo<User> findAll(int currentPage,String username);
void deleteById(int id);
void add(User user);
User selectUserById(int id);
void update(User user);
void deleteAll(List<Integer> ids);
}
实现类：
package com.zhongruan.service.impl;
import com.zhongruan.bean.Role;
import com.zhongruan.bean.UserRole;
import com.zhongruan.dao.RoleDao;
import com.zhongruan.service.IRoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class RoleService implements IRoleService {
@Autowired
private RoleDao roleDao;
@Override
public List<Integer> findRoleId(int userId) {
return roleDao.findRoleIdByUserId(userId);
}
@Override
public List<Role> findRoleByUserId(int id) {
return roleDao.findRoleByUserId(id);
}
@Override
public void add(List<Integer> ids, String userId) {
for(int roleId:ids){
UserRole userRole=new UserRole();
userRole.setUserId(Integer.parseInt(userId));
userRole.setRoleId(roleId);
roleDao.addRole(userRole);
}
}
}
package com.zhongruan.service.impl;
import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.User;
import com.zhongruan.dao.UserDao;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
@Service
public class UserService implements IUserService {
@Autowired
private UserDao userDao;
@Override
public int login(String username, String password) {
User user = userDao.findUserByUserName(username);
if (user!=null && user.getPassword().equals(password)){
return user.getId();
}
return -1;
}
@Override
public PageInfo<User> findAll(int currentPage,String username) {
PageInfo<User> pageInfo=new PageInfo<>();
pageInfo.setSize(5);
int tc=userDao.getTotalCount(username);
pageInfo.setTotalCount(tc);
int tp=(int)Math.ceil(tc/5.0);
pageInfo.setTotalPage(tp);
if(currentPage<1){
pageInfo.setCurrentPage(1);
}else if(currentPage>tp){
pageInfo.setCurrentPage(tp);
}else {
pageInfo.setCurrentPage(currentPage);
}
//0,5,10
int start=(pageInfo.getCurrentPage()-1)*5;
List<User> userList = userDao.findAll(start,username);
pageInfo.setList(userList);
return pageInfo;
}
/*@Override
public List<User> findAll() {
return userDao.findAll();
}*/
@Override
public void deleteById(int id) {
userDao.deleteById(id);
}
@Override
public void add(User user) {
userDao.add(user);
}
@Override
public User selectUserById(int id) {
return userDao.selectById(id);
}
@Override
public void update(User user) {
userDao.update(user);
}
@Override
public void deleteAll(List<Integer> ids) {
userDao.deleteAll(ids);
}
}
package com.zhongruan.controller;
import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.Role;
import com.zhongruan.bean.User;
import com.zhongruan.service.IRoleService;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private IUserService userService;
@Autowired
private IRoleService roleService;
@RequestMapping("/login.do")
public ModelAndView login(User user, HttpSession session){
int id = userService.login(user.getUsername(), user.getPassword());
ModelAndView modelAndView=new ModelAndView();
if(id!=-1){
List<Integer> roleIds = roleService.findRoleId(id);
session.setAttribute("roleIds",roleIds);
session.setAttribute("user",user);
modelAndView.setViewName("main");
}else {
modelAndView.setViewName("../failer");
}
return modelAndView;
}
@RequestMapping("/findAll.do")
public ModelAndView findAll(@RequestParam(defaultValue = "1") int currentPage,String username,@RequestParam(defaultValue = "0")int type,HttpSession session){
//当搜索的时候
/* if(username!=null && username!=""){
session.setAttribute("searchname",username);
}else if(type==0) {
username= (String) session.getAttribute("searchname");
}*/
if(type==1){
session.setAttribute("searchname",username);
}else {
username= (String) session.getAttribute("searchname");
}
PageInfo<User> pageInfo=userService.findAll(currentPage,username);
ModelAndView modelAndView=new ModelAndView();
modelAndView.addObject("pageInfo",pageInfo);
modelAndView.setViewName("user-list");
return modelAndView;
}
@RequestMapping("/deleteById.do")
public String delete(int id){
userService.deleteById(id);
return "redirect:findAll.do";
}
@RequestMapping("/add.do")
public String add(User user){
userService.add(user);
return "redirect:findAll.do";
}
@RequestMapping("toUpdate.do")
public ModelAndView toUpdate(int id){
User user=userService.selectUserById(id);
ModelAndView modelAndView=new ModelAndView();
modelAndView.setViewName("user-update");
modelAndView.addObject("user",user);
return modelAndView;
}
@RequestMapping("/update.do")
public String update(User user){
userService.update(user);
return "redirect:findAll.do";
}
@RequestMapping("deleteAll.do")
public String deleteAll(String userList){
String[] strs = userList.split(",");
List<Integer> ids=new ArrayList<>();
for(String s:strs){
ids.add(Integer.parseInt(s));
}
userService.deleteAll(ids);
return "redirect:findAll.do";
}
@RequestMapping("toAddRole.do")
public ModelAndView toAddRole(int id){
List<Role> roleList=roleService.findRoleByUserId(id);
ModelAndView mv=new ModelAndView();
mv.addObject("roles",roleList);
mv.addObject("id",id);
mv.setViewName("user-role-add");
return mv;
}
@RequestMapping("addRole.do")
@ResponseBody
public String add(String roleList,String userId){
String[] strs = roleList.split(",");
List<Integer> ids=new ArrayList<>();
for(String s:strs){
ids.add(Integer.parseInt(s));
}
roleService.add(ids,userId);
return "";
}
}
package com.zhongruan.filter;
import com.zhongruan.bean.User;
import javax.servlet.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
public class LoginFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request= (HttpServletRequest) servletRequest;
HttpServletResponse response= (HttpServletResponse) servletResponse;
HttpSession session = request.getSession();
User user= (User) session.getAttribute("user");
String uri=request.getRequestURI();
if(user==null && uri.indexOf("login.do")==-1){
response.sendRedirect(request.getContextPath()+"../login.jsp");
}else {
filterChain.doFilter(request,response);
}
}
@Override
public void destroy() {
}
}
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.zhongruan.dao.UserDao" >
<select id="findUserByUserName" parameterType="String" resultType="user">
select * from tb_user where username=#{username}
</select>
<select id="findAll" resultType="user" >
select * from tb_user
<if test="username!=null and username!=''">
WHERE username LIKE concat("%",#{username},"%")
</if>
limit #{start},5
</select>
<delete id="deleteById" parameterType="int">
delete from tb_user where id = #{id}
</delete>
<insert id="add" parameterType="user">
insert into tb_user (username,password) values (#{username},#{password})
</insert>
<select id="selectById" parameterType="int" resultType="user">
select * from tb_user where id=#{id}
</select>
<update id="update" parameterType="user">
update tb_user set username=#{username},password=#{password} where id=#{id}
</update>
<select id="getTotalCount" resultType="int">
select count(*) from tb_user
<if test="username!=null and username!=''">
WHERE username LIKE concat("%",#{username},"%")
</if>
</select>
<delete id="deleteAll" parameterType="list">
delete from tb_user where id in
<foreach collection="ids" item="id" open="(" close=")" separator=",">
#{id}
</foreach>
</delete>
</mapper>
RoleMapper.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.zhongruan.dao.RoleDao" >
<select id="findRoleIdByUserId" parameterType="int" resultType="int">
select roleId from user_role where userId=#{userId}
</select>
<select id="findRoleByUserId" parameterType="int" resultType="role">
SELECT * FROM tb_role WHERE id NOT IN (SELECT roleId FROM user_role WHERE userId=#{id})
</select>
<insert id="addRole" parameterType="userRole">
insert into user_role (userId,roleId) values (#{userId},#{roleId})
</insert>
</mapper>
jsp，完整项目可以从网盘下载：
链接: https://pan.baidu.com/s/1Lse-D_KcDgMFow9nfYZVzA?pwd=zwhe
提取码: zwhe 复制这段内容后打开百度网盘手机App，操作更方便哦