SSM框架模糊查询

User：
package com.zhongruan.bean;

public class User {
private int id;
private String username;
private String password;

public int getId() {
    return id;
}

public void setId(int 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;
}

@Override
public String toString() {
    return "User{" +
            "id=" + id +
            ", username='" + username + '\'' +
            ", password='" + password + '\'' +
            '}';
}

}

UserController：
package com.zhongruan.controller;

import com.github.pagehelper.PageInfo;
import com.zhongruan.bean.User;
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.servlet.ModelAndView;

import javax.servlet.http.HttpSession;
import java.util.List;

@Controller
public class UserController {
@Autowired
private IUserService userService;

@RequestMapping("/findAll.do")
public ModelAndView findAll(@RequestParam(defaultValue = "1") int pageNum,
                            @RequestParam(defaultValue = "5") int size,
                            String searchname, HttpSession session) {
    ModelAndView modelAndView=new ModelAndView();
    String username=(String) session.getAttribute("username");

    if(searchname!=null){
        session.setAttribute("searchname",searchname);
    }else {
        searchname=(String) session.getAttribute("searchname");
    }
    List<User> users=userService.findAll(pageNum,size,searchname);
    PageInfo<User> pageInfo=new PageInfo<>(users);

    modelAndView.setViewName("allUser.jsp");
    modelAndView.addObject("pageInfo",pageInfo);
    return modelAndView;

}
@RequestMapping("/login.do")
public String login(User user,HttpSession session){
    Boolean flag=userService.login(user.getUsername(),user.getPassword());
    if(flag){
        session.setAttribute("username",user.getUsername());
        return "redirect:/findAll.do";
    }else{
        return "faliure.jsp";
    }
}
@RequestMapping("/delete.do")
public String deleteById(int id){
    userService.deleteById(id);
    return "redirect:/findAll.do";
}

@RequestMapping("/toUpdate.do")
public ModelAndView toUpdate(int id){
    User user=userService.selectById(id);
    ModelAndView mv=new ModelAndView();
    mv.addObject("user",user);
    mv.setViewName("updateUser.jsp");

    return mv;
}
@RequestMapping("/addUser.do")
public String addById(User user) {
    userService.addById(user);
    return "redirect:/findAll.do";
}


@RequestMapping("/toupdate.do")
public ModelAndView toupdate(User user) {
    int id = user.getId();
    User users = userService.findById(id);
   ModelAndView mv = new ModelAndView();
    mv.setViewName("updateUser.jsp");
    mv.addObject("users", users);
    return mv;
}
@RequestMapping("update.do")
public String update(User user){
    userService.update(user);
    return "redirect:/findAll.do";

}

}

IUserDao：
package com.zhongruan.dao;

import com.zhongruan.bean.User;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface IUserDao {
List findAll(@Param(“searchname”) String searchname);
User selectByUserName(String name);
void deleteById(int id);
User selectById(int id);
void update(User user);

void  addById(User user);

}

LoginFilter：
package com.zhongruan.filter;

import javax.servlet.*;
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();
    if(session.getAttribute("username")==null&&
    request.getRequestURI().indexOf("/login.do")==-1){
        response.sendRedirect("index.jsp");
    }else {
        filterChain.doFilter(request,response);
    }

}

@Override
public void destroy() {

}

}

UserService：
package com.zhongruan.service.iml;

import com.github.pagehelper.PageHelper;
import com.zhongruan.bean.User;
import com.zhongruan.dao.IUserDao;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Service
public class UserService implements IUserService {
@Autowired
private IUserDao userDao;

@Override
public List<User> findAll(int pageNum, int size,String searchname) {
    PageHelper.startPage(pageNum, size);
    return userDao.findAll(searchname);
}

@Override
public Boolean login(String username, String password) {
    User user = userDao.selectByUserName(username);
    if (user != null && password.equals(user.getPassword())) {
        return true;
    }
    return false;
}

@Override
public void deleteById(int id) {
    userDao.deleteById(id);
}

@Override
public void addById(User user) {
    userDao.addById(user);
}

@Override
public void updateById(User user) {
    userDao.update(user);
}

@Override
public User findById(int id) {
    return null;
}

@Override
public User selectById(int id) {
    return userDao.selectById(id);
}

@Override
public void update(User user) {
    userDao.update(user);

}

}

IUserService：
package com.zhongruan.service;

import com.zhongruan.bean.User;

import java.util.List;

public interface IUserService {
List findAll(int pageNum,int size,String searchname);
Boolean login(String username,String password);
void deleteById(int id);

void addById(User user);

void  updateById(User user);
User findById(int id);

User selectById(int id);
void update(User user);

}

<?xml version="1.0" encoding="UTF-8"?>

<select id="findAll" resultType="com.zhongruan.bean.User" parameterType="String">
    select * from tb_user
    <where>
        <if test="searchname!=null">
            username like "%"#{searchname}"%"
        </if>
    </where>

</select>
<select id="selectByUserName" resultType="com.zhongruan.bean.User">
    select * from tb_user where username=#{username}
</select>

<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>
<delete id="deleteById" parameterType="int">
    delete from tb_user where id=#{id}
</delete>
<insert id="addById" parameterType="com.zhongruan.bean.User">
    insert into tb_user(username,password) values (#{username},#{password})
</insert>

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" isELIgnored="false"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

基于servlet+jsp框架的管理系统：简单实现增、删、改、查。

<div class="row clearfix">
    <div class="col-md-12 column">
        <div class="page-header">
            <h1>
                <small>新增用户</small>
            </h1>
        </div>
    </div>
</div>
<form action="/addUser.do"
      method="post">
    用户姓名：<input type="text" name="username"><br><br><br>
    用户密码：<input type="text" name="password"><br><br><br>
    <input type="submit" value="添加" >
</form>

 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: xcdn Date: 2019/9/26 Time: 10:09 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %>

基于servlet+jsp框架的管理系统：简单实现增、删、改、查。

<div class="row clearfix">
    <div class="col-md-12 column">
        <div class="page-header">
            <h1>
                <small>用户列表 —— 显示所有用户</small>
            </h1>
        </div>
    </div>
</div>
<div class="row">
    <div class="col-md-4 column">
        <a class="btn btn-primary" href="addUser.jsp">新增</a>
    </div>

    <form action="/findAll.do" method="post">
        <input name="searchname" type="text">
        <input type="submit" value="搜索">
    </form>

</div>
<br/>

<br/>
<div class="row clearfix">
    <div class="col-md-12 column">
        <table class="table table-hover table-striped">
            <thead>
            <tr>
                <th>id</th>
                <th>用户名</th>
                <th>密码</th>
                <th>操作</th>
            </tr>
            </thead>
            <tbody>
            <c:forEach var="user" items="${pageInfo.list}">
                <tr>
                <td>${user.id}</td>
                <td>${user.username}</td>
                <td>${user.password}</td>
                <td><a href="/delete.do?id=${user.id}">删除</a>|
                    <a href="/toUpdate.do?id=${user.id}">修改</a></td>
                </tr>
            </c:forEach>
            </tbody>
        </table>
    </div>
</div>
<div>
    <a href="/findAll.do?pageNum=1&size=5">首页</a>


        <a href="/findAll.do?pageNum=${pageInfo.pageNum-1}&size=5">上一页</a>

    <c:forEach begin="1" end="${pageInfo.pages}" var="i">
        <a href="/findAll.do?pageNum=${i}&size=5">${i}</a>
    </c:forEach>


        <a href="/findAll.do?pageNum=${pageInfo.pageNum+1}&size=5">下一页</a>


    <a href="/findAll.do?pageNum=${pageInfo.pages}&size=5">尾页</a>
</div>

 <%-- Created by IntelliJ IDEA. User: 虫仔0621 Date: 2019/10/14 Time: 14:30 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> 失败了  <%-- Created by IntelliJ IDEA. User: 虫仔0621 Date: 2019/10/12 Time: 10:32 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> hello hualili  <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <%-- Created by IntelliJ IDEA. User: 虫仔0621 Date: 2019/9/26 Time: 15:58 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <%----%> <%----%>

<!-- //for-mobile-apps -->
<%--<link href="css/style.css" rel="stylesheet" type="text/css" media="all" />--%>

用户名: 密码:

<%@ page language=“java” contentType=“text/html; charset=UTF-8”
pageEncoding=“UTF-8” isELIgnored=“false”%>
<%@ taglib prefix=“c” uri=“http://java.sun.com/jsp/jstl/core” %>

基于servlet+jsp框架的管理系统：简单实现增、删、改、查。

<div class="row clearfix">
    <div class="col-md-12 column">
        <div class="page-header">
            <h1>
                <small>更新用户</small>
            </h1>
        </div>
    </div>
</div>
<form action="/update.do"
      method="post">
    <input type="hidden" name="id" value="${user.id}"><br><br><br>
    用户姓名：<input type="text" name="username" value="${user.username}"><br><br><br>
    用户密码：<input type="text" name="password" value="${user.password}"><br><br><br>
    <input type="submit" value="更新" >
</form>