javaWeb用maven管理的ajax前后端分离的物业维修管理
说明：
使用maven项目
前后端分离
使用注解版Servlet（>3版本）
1、效果展示
已维修
待维修
说明：
使用了ajax异步
使用了jQuery动态创建div
未实现翻页
2、新建maven下的javaweb项目
1、新建项目
2、maven骨架选择
3、项目名
4、maven管理（重要）
5、项目结构
6、main下新建java，resource
右键main新建文件夹，一般会自动提示这两个文件夹
新建好后分别右击这两个文件夹
java包设置被javaroot，resources设置为resource root（一般idea自动会设置好的）
3、部分源码
说明：
各层都做了简化处理
pom依赖
<dependencies>
<!--数据库驱动-->
<!--数据库连接-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<!--servlet tomcat10改名javax jakarta-->
<!--jsp依赖（可能用上）-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<!--jstl依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--json转换器-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.14</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
复制代码<!--资源导出问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
复制代码jdbc.properties
driver=com.mysql.cj.jdbc.Driver ==这里是使用的8版本
url=jdbc:mysql://你的ip:3306/数据库名?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
user=root
password=root
复制代码pojo
package entity;
/**
* Author:甲粒子
* Date: 2021/11/30
* Description：维修
*/
public class Wx {
private Integer id;
private String username;
private String project;
private String address;
private String ctime;
private String phonenum;
private int status;
private String wxname;
private String wxphonenum;
private String wxtime;
private int wxmoney;
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 getProject() {
return project;
}
public void setProject(String project) {
this.project = project;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCtime() {
return ctime;
}
public void setCtime(String ctime) {
this.ctime = ctime;
}
public String getPhonenum() {
return phonenum;
}
public void setPhonenum(String phonenum) {
this.phonenum = phonenum;
}
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
public String getWxname() {
return wxname;
}
public void setWxname(String wxname) {
this.wxname = wxname;
}
public String getWxphonenum() {
return wxphonenum;
}
public void setWxphonenum(String wxphonenum) {
this.wxphonenum = wxphonenum;
}
public String getWxtime() {
return wxtime;
}
public void setWxtime(String wxtime) {
this.wxtime = wxtime;
}
public int getWxmoney() {
return wxmoney;
}
public void setWxmoney(int wxmoney) {
this.wxmoney = wxmoney;
}
public Wx(Integer id, String username, String project, String address, String ctime, String phonenum, int status, String wxname, String wxphonenum, String wxtime, int wxmoney) {
this.id = id;
this.username = username;
this.project = project;
this.address = address;
this.ctime = ctime;
this.phonenum = phonenum;
this.status = status;
this.wxname = wxname;
this.wxphonenum = wxphonenum;
this.wxtime = wxtime;
this.wxmoney = wxmoney;
}
public Wx() {
}
}
复制代码dao
package dao;
import entity.Wx;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;
/**
* Author:甲粒子
* Date: 2021/11/30
* Description：
*/
public class WxDaoImpl {
public static List<Wx> queryWxs()
{
Connection conn=null;
PreparedStatement pstmt = null;
ResultSet rt=null;
try
{
ResourceBundle bundle = ResourceBundle.getBundle("jdbc");
String driver = bundle.getString("driver");
String url = bundle.getString("url");
String user = bundle.getString("user");
String password = bundle.getString("password");
Class.forName(driver);
conn = DriverManager.getConnection(url,user,password);
String sql="select * from wx";
pstmt=conn.prepareStatement(sql);
rt=pstmt.executeQuery();
List<Wx>lst=new ArrayList<Wx>();
while(rt.next())
{
Wx dt=new Wx(rt.getInt("id"),rt.getString("username"),rt.getString("project"),rt.getString("address"),rt.getString("ctime"),rt.getString("phonenum"),rt.getInt("status"),rt.getString("wxname"),rt.getString("wxphonenum"),rt.getString("wxtime"),rt.getInt("wxmoney"));
lst.add(dt);
}
return lst;
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
return null;
}
catch(SQLException e)
{
e.printStackTrace();
return null;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
finally
{
try
{
if(rt!=null)
{
rt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(pstmt!=null)
{
pstmt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(conn!=null)
{
conn.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}
public static List<Wx> queryWxsByStatus(int status)
{
Connection conn=null;
PreparedStatement pstmt = null;
ResultSet rt=null;
try
{
ResourceBundle bundle = ResourceBundle.getBundle("jdbc");
String driver = bundle.getString("driver");
String url = bundle.getString("url");
String user = bundle.getString("user");
String password = bundle.getString("password");
Class.forName(driver);
conn = DriverManager.getConnection(url,user,password);
String sql="select * from wx where status=?";
pstmt=conn.prepareStatement(sql);
pstmt.setInt(1,status);
rt=pstmt.executeQuery();
List<Wx>lst=new ArrayList<Wx>();
while(rt.next())
{
Wx dt=new Wx(rt.getInt("id"),rt.getString("username"),rt.getString("project"),rt.getString("address"),rt.getString("ctime"),rt.getString("phonenum"),rt.getInt("status"),rt.getString("wxname"),rt.getString("wxphonenum"),rt.getString("wxtime"),rt.getInt("wxmoney"));
lst.add(dt);
}
return lst;
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
return null;
}
catch(SQLException e)
{
e.printStackTrace();
return null;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
finally
{
try
{
if(rt!=null)
{
rt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(pstmt!=null)
{
pstmt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(conn!=null)
{
conn.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}
public static List<Wx> queryWxsByName(String name)
{
Connection conn=null;
PreparedStatement pstmt = null;
ResultSet rt=null;
try
{
ResourceBundle bundle = ResourceBundle.getBundle("jdbc");
String driver = bundle.getString("driver");
String url = bundle.getString("url");
String user = bundle.getString("user");
String password = bundle.getString("password");
Class.forName(driver);
conn = DriverManager.getConnection(url,user,password);
String sql="select * from wx where username like ?";
pstmt=conn.prepareStatement(sql);
pstmt.setString(1,"'%"+name+"%'");
//System.out.println(sql);
rt=pstmt.executeQuery();
List<Wx>lst=new ArrayList<Wx>();
while(rt.next())
{
Wx dt=new Wx(rt.getInt("id"),rt.getString("username"),rt.getString("project"),rt.getString("address"),rt.getString("ctime"),rt.getString("phonenum"),rt.getInt("status"),rt.getString("wxname"),rt.getString("wxphonenum"),rt.getString("wxtime"),rt.getInt("wxmoney"));
lst.add(dt);
}
return lst;
}
catch(ClassNotFoundException e)
{
e.printStackTrace();
return null;
}
catch(SQLException e)
{
e.printStackTrace();
return null;
}
catch(Exception e)
{
e.printStackTrace();
return null;
}
finally
{
try
{
if(rt!=null)
{
rt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(pstmt!=null)
{
pstmt.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
try
{
if(conn!=null)
{
conn.close();
}
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}
}
复制代码service
package service;
import dao.WxDaoImpl;
import entity.Wx;
import java.util.List;
/**
* Author:甲粒子
* Date: 2021/11/30
* Description：
*/
public class WxServiceImpl {
public static List<Wx> selectAllWx(){
return WxDaoImpl.queryWxs();
}
public static List<Wx> selectAllWxByStatus(int status){
return WxDaoImpl.queryWxsByStatus(status);
}
public static List<Wx> selectAllWxByName(String name){
return WxDaoImpl.queryWxsByName(name);
}
}
复制代码servlet
package servlet;
import com.alibaba.fastjson.JSONObject;
import entity.Wx;
import service.WxServiceImpl;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
@WebServlet(name = "test",urlPatterns = "/test")
public class WxServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
try{
List<Wx> wxes = WxServiceImpl.selectAllWx();
out.write(JSONObject.toJSONString(wxes));
out.flush();
}catch (Exception e){
e.printStackTrace();
}finally {
out.close();
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
}
复制代码4、html
核心在js中，想要源码的私信笔者吧
由于篇幅的原因,这里只展示js
说明：
在页面加载的时候发送ajax请求
根据结果动态渲染
<script></script>
<script>
复制代码说明：
$(function(){
$(“#divId”).append("<div>这个是追加的div</div>");
//或者 $("<div>这个是追加的div</div>").appendTo("#divId");
//这里是在前面追加
$("#wx").prepend("...");
复制代码5、问题处理
1、jdbc.properties要放在src目录下
2、tomcat的配置
谢谢您的阅读。