SpringMVC使用ajax详细实现MySQL数据库的增删查改功能

1.本次项目基于maven管理项目，采用SpringMVC框架，使用c3p0数据连接池以及MySQL数据库进行项目。

1.1创建数据库：

create database if not exists springdemo;

1.2创建Account用户表

create table if not exists Account(id int(4) auto_increment primary key,name varchar(16) not null,password varchar(16) not null,age int(3) ,createtime datetime default now(),money int(8));

2.项目的创建：
首先创建一个maven工程：

对项目的Tomcat进行配置：


3.在pom.xml中引入项目的依赖文件

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

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>springMvc_CRUD_demo</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>springMvc_CRUD_demo Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
<!--    配置项目的编码-->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!--    配置项目的jdk的版本-->
    <maven.compiler.source>1.8</maven.compiler.source>
<!--    配置jdk编译器的版本-->
    <maven.compiler.target>1.8</maven.compiler.target>
<!--    spring的版本，方便下文引用-->
    <spring.version>5.2.8.RELEASE</spring.version>
  </properties>

  <dependencies>
<!--    引入Spring的context依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
<!--引入Spring的web依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
<!-- 引入Spring的MVC依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 引入Spring用于访问数据库的JDBC依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 引入数据源c3p0依赖-->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.5</version>
    </dependency>
    <!-- 引入MySQL数据库依赖-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.21</version>
    </dependency>
      <!--引入servlet的依赖-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
      <!--引入jsp的API依赖-->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- 引入Spring解析JSon数据的依赖 -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.11.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.11.2</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>springMvc_CRUD_demo</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

4.开始编写项目的实体类，业务逻辑类。

package daomain;

import com.fasterxml.jackson.annotation.JsonFormat;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Repository;
import java.io.Serializable;
import java.util.Date;

/**
 * Classname:Account
 *
 * @description:
 * @author: 陌意随影
 * @Date: 2020-08-05 23:06
 * @Version: 1.0
 **/
@Repository("account")
@Scope("prototype")
public class Account implements Serializable {
   //用户的唯一主键ID
    private int id;
   //用户名
    private String name;
    //用户密码
    private String password;
    //用户年龄
    private  int age;
    //用户创建时间
    private Date createTime;
    //用户的钱
     private int money;

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
    public Date getCreateTime() {
        return createTime;
    }

    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public int getId() {

        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                ", createTime=" + createTime +
                ", money=" + money +
                '}';
    }
}

package dao;

import daomain.Account;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * Classname:springMvc_response_demo
 *
 * @description:{description}
 * @author: 陌意随影
 * @Date: 2020-08-07 00:00
 */

public interface AccountDao {
    /**
     * @Description :保存用户
     * @Date 21:10 2020/8/7 0007
     * @Param * @param account ：
     * @return boolean
     **/
    public boolean save(Account account);
    /**
     * @Description :通过ID删除用户
     * @Date 21:10 2020/8/7 0007
     * @Param * @param id ：
     * @return boolean
     **/
    public boolean delteAccount(int id);
    //跟新用户
    public boolean updateAccount(Account newAccount);
    //通过ID查找用户
    public  Account findAccount(int id);
    //查找所有用户
    public List<Account> findAllAccount();

}

package dao.impl;

import dao.AccountDao;
import daomain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * Classname:AccountDaoImpl
 *
 * @description:
 * @author: 陌意随影
 * @Date: 2020-08-07 00:05
 * @Version: 1.0
 **/
@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {
    @Autowired
   private JdbcTemplate jdbcTemplete ;
 @Override
    public boolean save(Account account) {
    return jdbcTemplete.update("insert into account(name,password,age,createTime,money) values(?,?,?,?,?)",account.getName(),
             account.getPassword(),account.getAge(),account.getCreateTime(),account.getMoney()) == 1;
    }

    @Override
    public boolean delteAccount(int id) {

     return jdbcTemplete.update("delete from account where id=?",id) == 1;
    }

    @Override
    public boolean updateAccount(Account newAccount) {
    return jdbcTemplete.update("update account set name=?,password=?,age=?,createTime=?,money=? where id=?",newAccount.getName(),newAccount.getPassword(),newAccount.getAge(),
             newAccount.getCreateTime(),newAccount.getMoney(),newAccount.getId())== 1;
    }

    @Override
    public Account findAccount(int id) {
     List<Account> accountList = jdbcTemplete.query("select* from account where id=?", new BeanPropertyRowMapper<Account>(Account.class), id);
     if (accountList.isEmpty()){
      return  null;
     }
     if (accountList.size() == 1){
      return  accountList.get(0);
     }
     return  null;
    }

    @Override
    public List<Account> findAllAccount() {
        return jdbcTemplete.query("select* from account ",new BeanPropertyRowMapper<Account>(Account.class));
    }
}

package service;

import daomain.Account;

import java.util.List;

/**
 * Classname:springMvc_response_demo
 *
 * @description:{description}
 * @author: 陌意随影
 * @Date: 2020-08-07 00:02
 */
public interface AccountService {
    /**
     * @Description :保存用户
     * @Date 21:10 2020/8/7 0007
     * @Param * @param account ：
     * @return boolean
     **/
    public boolean save(Account account);
    /**
     * @Description :通过ID删除用户
     * @Date 21:10 2020/8/7 0007
     * @Param * @param id ：
     * @return boolean
     **/
    public boolean delteAccount(int id);
    //跟新用户
    public boolean updateAccount(Account newAccount);
    //通过ID查找用户
    public  Account findAccount(int id);
    //查找所有用户
    public List<Account> findAllAccount();
}

package service.impl;

import dao.AccountDao;
import daomain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import service.AccountService;

import java.util.List;

/**
 * Classname:AccountServiceImpl
 *
 * @description:
 * @author: 陌意随影
 * @Date: 2020-08-07 00:03
 * @Version: 1.0
 **/
@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Autowired
    private AccountDao accountDao;
    @Override
    public boolean save(Account account) {
        return accountDao.save(account);
    }

    @Override
    public boolean delteAccount(int id) {
        return  accountDao.delteAccount(id);
    }

    @Override
    public boolean updateAccount(Account newAccount) {
return  accountDao.updateAccount(newAccount);
    }

    @Override
    public Account findAccount(int id) {
        return accountDao.findAccount(id);
    }

    @Override
    public List<Account> findAllAccount() {
        return accountDao.findAllAccount();
    }
}

5.书写控制器的代码

package controller;

import daomain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;
import service.AccountService;

import javax.servlet.http.HttpServletResponse;
import java.util.Date;
import java.util.List;

/**
 * Classname:AccountController
 *
 * @description:
 * @author: 陌意随影
 * @Date: 2020-08-05 23:07
 * @Version: 1.0
 **/
@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private AccountService accountService ;
    /**
     * @Description :保存用户
     * @Date 21:15 2020/8/7 0007
     * @Param * @param account ：
     * @return java.lang.String
     **/
    @RequestMapping("/saveAccount")
    public @ResponseBody String saveAccount(@RequestBody Account account){
        boolean fla = accountService.save(account);
        String str ="";
        if (fla){
            str ="{\"msg\":\"保存用户成功\"}";
            System.out.println("保存用户："+account);
        }else{
            str ="{\"msg\":\"保存用户失败\"}";
        }
        return str;
    }
    /**
     * @Description :删除用户
     * @Date 21:15 2020/8/7 0007
     * @Param * @param id ：
     * @return java.lang.String
     **/
    @RequestMapping("/deleteAccount")
    public @ResponseBody String deleteAccount(@RequestParam int id){
        boolean fla = accountService.delteAccount(id);
        String str ="";
        if (fla){
            str ="{\"msg\":\"删除用户成功\"}";

        }else{
            str ="{\"msg\":\"删除用户失败\"}";
        }
        return str;
    }
    /**
     * @Description :更新用户
     * @Date 21:16 2020/8/7 0007
     * @Param * @param newAccount ：
     * @return java.lang.String
     **/
    @RequestMapping("/updateAccount")
    public @ResponseBody String updateAccount(@RequestBody Account newAccount){
        boolean fla = accountService.updateAccount(newAccount);
        String str ="";
        if (fla){
            str ="{\"msg\":\"更新用户成功\"}";

        }else{
            str ="{\"msg\":\"更新用户失败\"}";
        }
        return str;
    }
    /**
     * @Description :通过ID查找用户
     * @Date 21:16 2020/8/7 0007
     * @Param * @param id ：
     * @return java.lang.String
     **/
    @RequestMapping("/findAccountById")
    public @ResponseBody String findAccountById(@RequestParam int id){
        Account account = accountService.findAccount(id);
        String str ="";
        if (account != null){
            str ="{\"msg\":\"查找用户成功\"}";
            System.out.println("查找用户"+account);
        }else{
            str ="{\"msg\":\"查找用户失败\"}";
        }
        return str;
    }
    /**
     * @Description :查找所有的用户
     * @Date 21:16 2020/8/7 0007
     * @Param * @param  ：
     * @return java.lang.String
     **/
    @RequestMapping("/findAll")
    public @ResponseBody String findAll(){
        List<Account> accountList = accountService.findAllAccount();
        String str ="";
        if (accountList != null){
            str ="{\"msg\":\"查找所有用户成功\"}";
            System.out.println("查找所有用户："+accountList);

        }else{
            str ="{\"msg\":\"查找所有用户失败\"}";
        }
        return str;
    }
}

注意：
5.1.@RequestMapping("/account")表示将AccountController映射为一级目录/account，@RequestMapping("/saveAccount")表示将方法saveAccount(@RequestBody Account account)映射为二级目录
/account/saveAccount,当我们访问该方法时：account/saveAccount即为在前端的访问路径。
5.2.saveAccount(@RequestBody Account account)中的@RequestBody会将前端请求的JSon数据封装到Account对象中。在封装的过程中，需要用到
JSon的解析工具jackson-databind和jackson-core，所以在pom.xml中要引入对应的依赖。
并且在自动封装的过程中，由于实体类中有Java类型Date的属性createTime，而在json的数据中时间类型格式是不一样的，所以需要我们对实体类Account中Date类型进行处理。比如我在前端请求的数据为：

'{"id":"3","name":"root","password":"root","age":14,"createTime":"2020-08-01 10:39:39","money":54}'

理论上说自动封装后的实体类Account中的createTIme应该能疯转上的，但是事实上是在这个过程中发生了转换错误：

org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.logException Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `java.util.Date` from String "2020-08-01 10:39:39": not a valid representation (error: Failed to parse Date value '2020-08-01 10:39:39': Cannot parse date "2020-08-01 10:39:39": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSX', parsing fails (leniency? null)); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2020-08-01 10:39:39": not a valid representation (error: Failed to parse Date value '2020-08-01 10:39:39': Cannot parse date "2020-08-01 10:39:39": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSX', parsing fails (leniency? null))
 at [Source: (PushbackInputStream); line: 1, column: 56] (through reference chain: daomain.Account["createTime"])]

因此我们需要手动对其，处理的方式为使用JsonFormat注解：

5.3 public @ResponseBody String saveAccount(@RequestBody Account account)中 @ResponseBody注解会将返回值自动化为响应类型的格式，比如响应的类型是JSON，则自动转换为json格式。
5.4 public @ResponseBody String deleteAccount(@RequestParam int id)中的@RequestParam会将前端请求参数中的key为id的对应的value复制给参数id。比如 url:"account/findAccountById?id=6",那么public @ResponseBody String deleteAccount(@RequestParam int id)中的参数id的值会自动获取为id=6.请求l参数中的key要和方法参数中的名称一致。
6.配置springMVCConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
<!--      开启注解扫描每个包下的所有类-->
    <context:component-scan base-package="controller"></context:component-scan>
    <context:component-scan base-package="daomain"></context:component-scan>
    <context:component-scan base-package="service"></context:component-scan>
    <context:component-scan base-package="dao"></context:component-scan>

!--    视图解析器对像这里表示解析 /WEB-INF/pages/下的jsp文件，此次演示并没有使用到pages这个文件夹，
这里配置好是为了使整个项目更加完善，想要增加前端页面可以在 /WEB-INF/pages/下添加新的jsp文件-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
<!--    配置JdbcTemplate，并注入数据源-->
    <bean id="jdbcTemplete" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSourecs"></property>
    </bean>
<!--    配置c3po数据源-->
    <bean id="dataSourecs" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--        配置数据库连接的用户名-->
         <property name="user" value="root"></property>
        <!--        配置数据库连接的密码-->
        <property name="password" value="root"></property>
        <!--        配置数据库连接的驱动-->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <!--        配置数据库连接的url-->
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/springdemo?serverTimezone=UTC"></property>
    </bean>

    <!--    开启SpringMVC注解支持-->
    <mvc:annotation-driven ></mvc:annotation-driven>
    <!--    放行静态资源 
    location表示要放行的文件
    mapping表示放行文件的映射路径
   mapping="/js/**" 表示放行js目录下的所有文件以及子文件夹中的文件   
    -->
    <mvc:resources mapping="/js/**" location="/js/"></mvc:resources>
</beans>

7..配置web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
<!--  配置前端控制器，对前端请求进行拦截-->
  <servlet>
    <servlet-name> dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--    在启动时开始加载项目资源文件夹resources中的springMVCConfig.xml-->
    <init-param>
<!--      加载资源根目录文件-->
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springMVCConfig.xml</param-value>
    </init-param>
<!--    项目启动时开始加载文件-->
    <load-on-startup>1</load-on-startup>
  </servlet>
<!--  对所有的请求进行拦截-->
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
<!--  配置编码过滤器-->
  <filter>
    <filter-name> characterEncodingFilter</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>
  </filter>
<!--  配置编码过滤器的映射路径，这里表示对所有的请求都进行拦截过滤-->
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

8.在index.jsp中书写前端代码

<%--
  Created by IntelliJ IDEA.
  User: 陌意随影
  Date: 2020/8/5 0005
  Time: 23:17
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java"  isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
    <script src="js/jquery-3.2.1.min.js"></script>
<%--    <script src="https://lib.sinaapp.com/js/jquery/2.0.2/jquery-2.0.2.min.js"></script>--%>
    <script>

        $(function () {
            //处理保存用户的ajax请求
            $("#saveBtn").click(function () {
                $.ajax({
                    url:"account/saveAccount",
                    contentType:"application/json;charset=UTF-8",
                    data:'{"name":"root","password":"root","age":14,"createTime":"2020-08-01 10:39:39","money":54}',
                    dataType:"json",
                    type:"post",
                    success:function (data) {
                        alert(data.msg)
                    }
                })
            });
            //通过ID删除用户的ajax请求
            $("#deleteBtn").click(function () {
                $.ajax({
                    url:"account/deleteAccount?id=4",
                    dataType:"json",
                    type:"get",
                    success:function (data) {
                        alert(data.msg)
                    }
                })
            })
            //通过id查找用户的ajax请求
            $("#findByIdBtn").click(function () {
                $.ajax({
                    url:"account/findAccountById?id=6",
                    dataType:"json",
                    type:"get",
                    success:function (data) {
                        alert(data.msg)
                    }
                })
            })
            //查找全部用户的ajax请求
            $("#findAllBtn").click(function () {
                $.ajax({
                    url:"account/findAll",
                    dataType:"json",
                    type:"get",
                    success:function (data) {
                        alert(data.msg)
                    }
                })
            })
            //处理更新用户的ajax请求
            $("#updateBtn").click(function () {
                $.ajax({
                    url:"account/updateAccount",
                    contentType:"application/json;charset=UTF-8",
                    data:'{"id":"3","name":"root","password":"root","age":14,"createTime":"2020-08-01 10:39:39","money":54}',
                    dataType:"json",
                    type:"post",
                    success:function (data) {
                        alert(data.msg)
                    }
                })
            });
        })
    </script>
</head>
<body>
<h3>首页</h3>
<button type="button" id="saveBtn">保存用户</button><br>
<button type="button" id="deleteBtn">删除用户</button><br>
<button type="button" id="findByIdBtn">根据ID获取用户</button><br>
<button type="button" id="findAllBtn">查询所有用户</button><br>
<button type="button" id="updateBtn">更新用户</button><br>
</body>
</html>

8.1注意：此次使用ajax发送异步请求，需要引入JQuery，

然后为了防止前端控制器拦截了静态资源文件，所以我们要在springMVCConfig.xml中放行资源文件不进行拦截。

8.2：测试时可以对每个ajax中的url参数进行修改，从而进行不同的增删查改操作。
8.3ajax请求数据data中的createTime格式要和 @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone = "GMT+8")中的pattern格式一致。比如
当pattern="yyyy-MM-dd HH:mm:ss"时， data:'{"id":"3","name":"root","password":"root","age":14,"createTime":"2020-08-01 10:39:39","money":54}'中的"createTime":"2020-08-01 10:39:39"；
当pattern="yyyy/MM/dd HH:mm:ss"时， data:'{"id":"3","name":"root","password":"root","age":14,"createTime":"2020-08-01 10:39:39","money":54}'中的"createTime":"2020/08/01 10:39:39"，

9.开始启动Tomcat进行测试。

10.本项目的源代码已经上传到个人博客的服务器，有需要请自行下载源代码然后解压作为maven项目导入idea即可：http://moyisuiying.com/wp-content/uploads/2020/08/springMvc_CRUD_demo.rar