Springboot ＋ bootstrap 实现增删改查

SpringBoot ＋ bootstrap 配合 mysql 实现增删改查功能
创建项目
打开 idea 工具 ---- 点击 File --- new --- Project 创建springBoot 项目工程，
版本统一：我使用的 mysql5.7 maven3.6.3 jdk1.8 idea2021.2
进行添加jar包配置

创建Springboot 工程好后，可以查看一下pom.xml 配置文件

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.csq</groupId>
    <artifactId>csqtest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>csqtest</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
<!-- mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.1</version>
        </dependency>

<!--        mysql连接器-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

<!--阿里数据源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.9</version>
        </dependency>

        <!--        获取页面session对象request对象response对象 HttpServletXXX jar包-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
        </dependency>

        <!--        json转换工具包-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

<!--        <dependency>-->
<!--            <groupId>org.apache.tomcat.embed</groupId>-->
<!--            <artifactId>tomcat-embed-core</artifactId>-->
<!--            <version>9.0.62</version>-->
<!--        </dependency>-->
    </dependencies>



    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!-- 如果不配置fork，devtools就不会起作用,devtools是前端开发工具-->
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

完成pom.xml 后，下面我们创建mysql数据库

CREATE TABLE `user` (
  `id` int(10) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `username` varchar(255) DEFAULT NULL COMMENT '姓名',
  `password` varchar(255) DEFAULT NULL COMMENT '密码',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4;

可以手动创建一条数据先

完成数据库后，先给大家看一下我的整体实现增删改查的包

下面我们创建一个实体类，pojo ----- User.java

package com.csq.csqtest.pojo;

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

    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;
    }

    public User(Integer id,String username,String password) {
        this.id=id;
        this.username=username;
        this.password=password;
    }
    public User() {

    }

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

创建方法接口 service --- UserService

package com.csq.csqtest.service;

import com.csq.csqtest.pojo.User;

import java.util.List;

public interface UserService {
    //查询全部
    List<User> findAll();
    //新增数据
    int save(User user);
    //删除数据
    Integer delete(int id);
    //根据id查找
    User get(int id);
    //更新数据
    int update(User user);

//    //根据姓名查询
//    User get(String username);
}

实现方法 impl ---- UserServiceImpl.java

package com.csq.csqtest.service.impl;

import com.csq.csqtest.mapper.UserMapper;
import com.csq.csqtest.pojo.User;
import com.csq.csqtest.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;


    @Override
    public List<User> findAll() {
        return userMapper.findAll();
    }

    @Override
    public int save(User user) {
        return userMapper.save(user);
    }

    @Override
    public Integer delete(int id) {
        return userMapper.delete(id);
    }

    @Override
    public User get(int id) {
        return userMapper.get(id);
    }

//    @Override
//    public User get(String username) {
//        return userMapper.get(username);
//    }

    @Override
    public int update(User user) {
        return userMapper.update(user);
    }
}

创建mapper --- UserMapper.java

package com.csq.csqtest.mapper;

import com.csq.csqtest.pojo.User;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface UserMapper {
    //查询全部
    @Select("select * from user")
    List<User> findAll();

    //新增数据
    @Insert("insert into user (username,password) values (#{username},#{password})")
    public int save(User user);

    //删除数据
    @Delete("delete from user where id=#{id}")
    public int delete(int id);

    //根据id查找
    @Select("select * from user where id=#{id}")
    public User get(int id);


    //根据username查询
//    @Select("select * from user where id=#{id}")
//    public User get(String username);


    //更新数据
    @Update("update user set username=#{username},password=#{password} where id=#{id}")
    public int update(User user);

}

创建controller ---- UserControl.java

package com.csq.csqtest.controller;

import com.csq.csqtest.pojo.User;
import com.csq.csqtest.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
import java.util.Map;

//控制层，导入Service层
@Controller
public class UserControl {
    @Autowired
    private UserService userService;

    //查询全部,在mvc中model层就是dao层，在java中无特殊含义就是模块
    @GetMapping("/index.html")
    public String userList(Map<String, List> result) {
        List<User> Users = userService.findAll();
        result.put("users", Users);
        return "index";
    }

    //新增数据
    @PostMapping("/add")
    public String save(User user) {
        userService.save(user);
        return "redirect:/index.html";
    }

    //删除数据,
    @RequestMapping("/delete/{id}")
    public String delete(@PathVariable Integer id, HttpServletResponse servletResponse) throws IOException {
        userService.delete(id);
        System.out.println("delete方法执行");
        return "redirect:/index.html";
    }


    //根据id进行修改,需要先获得该id对应的值，所以需要get请求
    @GetMapping("/updatePage/{id}")
    public String updatePage(Model model, @PathVariable int id) {
        User users = userService.get(id);
        model.addAttribute("users", users);
        return "modifie";
    }

    @PutMapping("/update")
    public String updateUser(Model model, User user, HttpServletRequest request) {
        String id = request.getParameter("id");
        User userById = userService.get(Integer.parseInt(id));
        userService.update(user);
        System.out.println(user);
        return "redirect:/index.html";
    }


    //根据id查询
    @RequestMapping("/get")
    public String get(Model model, int id) {
        User users = userService.get(id);
        model.addAttribute("users", users);
        return "index";
    }

//    @RequestMapping("/getusername")
//    public String get(Model model, String username) {
//        User users = userService.get(username);
//        model.addAttribute("users", users);
//        return "index";
//    }
}

接下来实现配置application.yml

spring:
  web:
    resources:
      static-locations: classpath:/static/,classpath:/templates/
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://localhost:3306/zls?useSSL=false&useUnicode=true&characterEncoding=utf-8
    username: root    //账号
    password: 123456   //密码
    driver-class-name: com.mysql.cj.jdbc.Driver
  mvc:
    hiddenmethod:
      filter:
        enabled: true


  devtools:
    restart:
      enabled: true #设置开启热部署
  freemarker:
    cache: false #页面不加载缓存，修改即使生效
mybatis:
  configuration:
    map-underscore-to-camel-case: true #下划线驼峰设置
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl   # 打印SQL语句


server:
  port: 8082    //端口号

然后访问：

空白是因为数据库没有数据，访问成功。

下面开始填写前端，调用前端框架：

bootstrap

在 templates 里面创建一个html --- index.html

 <!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>用户列表</title>
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>

<style>
    a{
        color: #ffffff;
    }
    h1{
        /*文字对齐*/
        text-align: center;
    }
    th{
        text-align: center;
    }
</style>

<body>
<div>
<h1 style="color: darkcyan">信息系统管理</h1>
<!--    <p style="text-align: center">-->
<!--     <button class="btn btn-primary">搜索</button>-->
<!--        <input type="text" style="width: 300px; height: 33px; /">-->
<!--    </p>-->
    <form action="/get" method="post">
        输入编号:<input class="form-control" type="text" th:value="${#ids}" name="id"><br>
        <button class="btn btn-primary btn-lg btn-block">查询</button>
    </form>

<!--    <form action="/getusername" method="post">-->
<!--        输入姓名:<input class="form-control" type="text" th:value="${#uris}" name="username"><br>-->
<!--        <button class="btn btn-primary btn-lg btn-block">查询</button>-->
<!--    </form>-->
</div>
<!--table-striped:斑马线格式，table-bordered：带边框的表格，table-hover：鼠标悬停高亮的表格-->
<table class="table table-striped table-bordered table-hover text-center">
    <thead>
    <tr style="text-align:center">
<!--        th标签定义html表格中的表头单元格-->
        <th>编号</th>
        <th>姓名</th>
        <th>密码</th>
        <th>操作</th>
    </tr>
    </thead>
<!--tr标签定义html表格中的所有行-->
<!--    遍历集合，如果被遍历的变量users为null或者不存在，则不会进行遍历，也不会报错-->
    <tr th:each="user:${users}">
<!--        td标签定义html表格中的标准单元格-->
        <td th:text="${user.id}"></td>
        <td th:text="${user.username}"></td>
        <td th:text="${user.password}"></td>
        <td>
<!--         a标签用来定义超链接 href表示超链接-->
            <a class="btn btn-primary" th:href="@{'/updatePage/'+${user.id}}">更改</a>
            <a class="btn btn-danger" th:href="@{'/delete/'+${user.id}}">删除</a>
        </td>
    </tr>
</table>
<a href="/add.html"> <input type="button" value="添加用户" class="btn btn-block" style="color: cadetblue; background-color: lightblue"/></a>
<!--<button class="btn btn-block" style="color: cadetblue; background-color: lightblue"><a href="/add.html">添加用户</a></button>-->

</body>

</html>

记住，数据库一定要有数据，现在开始访问，成功访问：

注意自己的端口号访问的时候：

下面开始实现提交功能--- add.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>添加用户</title>
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>

<div style="width:600px;height:100%;margin-left:270px;">
    <form action="/add" method="post">
<!--        form-control给input添加这个class后就会使用bootstrap自带的input框-->
        用户名：<!--/*@thymesVar id="password" type=""*/-->
        <input class="form-control" type="text" th:value="${username}" name="username"><br>
        密 码：<!--/*@thymesVar id="password" type="ch"*/-->
        <input class="form-control" type="text" th:value="${password}" name="password"><br>
        <button class="btn btn-primary btn-lg btn-block">保存</button>
    </form>
</div>

</body>
</html>

开始进行访问测试有没有成功：：

访问成功，添加数据成功

下面进行修改数据：：：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>修改用户</title>
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

<div style="width:600px;height:100%;margin-left:270px;">
    <form action="/update" method="post">
        <input name="_method" type="hidden" value="put">
        ID：<input class="form-control"  type="text" th:value="${users.id}" name="id"><br>
        用户名：<input class="form-control" type="text" th:value="${users.username}" name="username"><br>
        密 码：<input class="form-control" type="text" th:value="${users.password}" name="password"><br>
        <button class="btn btn-primary btn-lg btn-block" type="submit">提交</button>
    </form>
</div>

</body>
</html>

成功：：

想要源码，麻烦关注私聊，谢谢！

posted @ 2022-10-29 17:00 曾祥财阅读(862) 评论(0) 编辑收藏举报

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人生就是一个起点，一波未平一波又起……

Springboot ＋ bootstrap 实现增删改查

SpringBoot ＋ bootstrap 配合 mysql 实现增删改查功能

创建项目

打开 idea 工具 ---- 点击 File --- new --- Project 创建springBoot 项目工程，

版本统一：我使用的 mysql5.7 maven3.6.3 jdk1.8 idea2021.2

公告

人生就是一个起点，一波未平 一波又起……

Springboot ＋ bootstrap 实现 增删改查

SpringBoot ＋ bootstrap 配合 mysql 实现增删改查功能

创建项目

打开 idea 工具 ---- 点击 File --- new --- Project 创建springBoot 项目工程，

版本统一： 我使用的 mysql5.7 maven3.6.3 jdk1.8 idea2021.2

公告

人生就是一个起点，一波未平一波又起……

Springboot ＋ bootstrap 实现增删改查

版本统一：我使用的 mysql5.7 maven3.6.3 jdk1.8 idea2021.2