spring boot+mybatis+mysql簡單項目搭建

啥也不說，上代碼和部分解釋（本文使用idea開發工具）

創建spring boot項目非常簡單

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直接next，改好你的存儲空間後，finish即可

因爲spring boot自己引入了maven依賴  ，所以需要修改maven的地址，看下圖

 

因爲springboot本身不生成webapp文件，所以需要配置，如下圖

 

接下來配置application.yml      （本篇使用的yml方式配置，可上網搜properties的配置）

spring:
  mvc:
    view:
      prefix: /WEB-INF/views/ #標註掃描jsp的目錄
      suffix: .jsp
  datasource:
    url: jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf8
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver #驅動
  jpa:
    hibernate:
      ddl-auto: update #新增數據庫鏈接必備
server:
  port: 8080

接下來是依賴（包含mybatis，mysql以及spring boot不支持jsp的依賴）

        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.21</version>
        </dependency>

        <!--因springboot不支持jsp，導入依賴解決 -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

創建bean，比如我創建的是student類

package com.rmg.mysql.example.mysqldemo.pojo;

public class Student {

    private Integer id;
    private String name;
    private String password;
    private String description;

    public Integer getId() {
        return id;
    }

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

    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 String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", password='" + password + '\'' +
                ", description='" + description + '\'' +
                '}';
    }
}

接下來創建一個StudentMapper用來操作數據庫進行查詢

package com.rmg.mysql.example.mysqldemo.mapper;

import com.rmg.mysql.example.mysqldemo.pojo.Student;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface StudentMapper {

    //無腦全數據查詢
    @Select("SELECT * FROM BaseStudent")
    List<Student> findAll();

}

接下來創建一個業務類的接口實現StudentServiceImpl

package com.rmg.mysql.example.mysqldemo.serviceImpl;

import com.rmg.mysql.example.mysqldemo.mapper.StudentMapper;
import com.rmg.mysql.example.mysqldemo.pojo.Student;
import com.rmg.mysql.example.mysqldemo.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class StudentServiceImpl implements StudentService {

    @Autowired
    private StudentMapper studentMapper;

    //無腦查詢student表全部數據
    @Override
    public List<Student> findAll() {
        return studentMapper.findAll();
    }
}

接下來新建一個接口StudentService

package com.rmg.mysql.example.mysqldemo.service;

import com.rmg.mysql.example.mysqldemo.pojo.Student;

import java.util.List;

public interface StudentService {

    List<Student> findAll();


}

接下來新建一個控制類StudentController

package com.rmg.mysql.example.mysqldemo.controller;

import com.rmg.mysql.example.mysqldemo.pojo.Student;
import com.rmg.mysql.example.mysqldemo.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
public class StudentController {

    @Autowired
    private StudentService studentService;

    @RequestMapping("/student")
    public String findAll(Model model){
        List<Student> studentList = studentService.findAll();
        model.addAttribute("students",studentList);
        return "studentList";
    }

}

最後創建一個jsp界面

<%--
  Created by IntelliJ IDEA.
  User: 任明逛
  Date: 2019/11/7
  Time: 20:36
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <title>展示列表</title>
</head>
<body>

    <table align='center' border='1' cellspacing='0'>
        <tr>
            <td>id</td>
            <td>name</td>
            <td>password</td>
            <td>description</td>
        </tr>
        <c:forEach items="${students}" var="s" varStatus="st">
            <tr>
                <td>${s.id}</td>
                <td>${s.name}</td>
                <td>${s.password}</td>
                <td>${s.description}</td>
            </tr>
        </c:forEach>
    </table>

</body>
</html>

給大家展示一下我的項目分包

 

啓動後界面展示：

至此一個簡單的spring boot項目搭建完成。如果啓動後出現錯誤可留言=.=.=.=.=.=.=.=..=.=.=.=.=.=.=.=.=.=