SpringBoot整合Mybatis+Druid+数据库（注解版）

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mb5ff80520dfa04 2021-01-11 19:16:37

文章标签 SpringBoot 文章分类 Java 后端开发

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SpringBoot整合Mybatis+Druid+数据库（注解版）_SpringBoot

正题

Spring boot ：2.１.5RELEASE ；数据库（Mysql、Oracle）；Mybatis；阿里云的连接池 : Druid ；

步骤

１．POM依赖

<!-- MyBatis --><dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.2</version></dependency>
 <!-- MySQL --><dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId></dependency>
 <!-- Oracle --><!--<dependency>
	<groupId>com.oracle</groupId>
	<artifactId>ojdbc14</artifactId>
	<version>10.2.0.4.0</version>/dependency>-->
 <!-- Druid --><dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.16</version></dependency>

2．application.properties

#Mybatis+MySQL+Druid#Mysql时区异常URL后添加serverTimezone=GMT%2B8/连接池:typr/初始化连接:initialSize/最大空闲数:maxActive/最小空闲数:minIdle/获取连接等待时间:maxWait/最小等待时间:minEvictableIdleTimeMillis/关闭后不自动提交:defaultAutoCommitspring.datasource.type=com.alibaba.druid.pool.DruidDataSourcespring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&serverTimezone=GMT%2B8&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false#spring.datasource.url=jdbc:oracle:thin:@127.0.0.1:1521:testspring.datasource.username=rootspring.datasource.password=rootspring.datasource.driverClassName=com.mysql.cj.jdbc.Driverspring.datasource.initialSize=20spring.datasource.maxActive=50spring.datasource.minIdle=10#spring.datasource.maxWait=60000#spring.datasource.minEvictableIdleTimeMillis=3600000spring.datasource.defaultAutoCommit=false

3. 其他文件生成

User.java

public class User {
 
    public Integer uid;
    public String uname;
    public String upassword;
 
    public Integer getUid() {
        return uid;
    }
 
    public void setUid(Integer uid) {
        this.uid = uid;
    }
 
    public String getUanme() {
        return uname;
    }
 
    public void setUanme(String uanme) {
        this.uname = uanme;
    }
 
    public String getUpassword() {
        return upassword;
    }
 
    public void setUpassword(String upassword) {
        this.upassword = upassword;
    }
 
    @Override
    public String toString() {
        return "User{" +
                "uid=" + uid +
                ", uname='" + uname + '\'' +
                ", upassword='" + upassword + '\'' +
                '}';
    }}

UserDao.java

注解的形式，我感觉比XML好用

import com.spring.boot.bean.User;import org.apache.ibatis.annotations.Select;import org.apache.ibatis.annotations.Update;
 import java.util.List;
 public interface UserDao {
 
    @Select("select * from user")
    public List<User> AllUser();
 
    @Update("<script> " + "update user" +
            "<set>"+  "<if test='uname!=null'>uname=#{uname},</if>"+
            "<if test='upassword!=null'>upassword=#{upassword},</if>"+
            "</set>"+ "where uid=#{uid}"+
            " </script> ")
    public int Update(User user);
 }

UserService.java

import com.spring.boot.bean.User;import java.util.List;
 public interface UserService {
 
    public List<User> AllUser();
 
    public int Update(User user);
 }

UserImpl.java

主要是注解问题Service可以命名，主要还是看自己的日常使用

import com.spring.boot.bean.User;import com.spring.boot.dao.UserDao;import com.spring.boot.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;
 import java.util.List;
 @Servicepublic class UserImpl implements UserService {
 
    @Autowired
    private UserDao userDao;
 
    @Override
    public List<User> AllUser() {
 
        return userDao.AllUser();
    }
 
    @Override
    public int Update(User user) {
        return userDao.Update(user);
    }}

UserController.java

import com.spring.boot.bean.User;import com.spring.boot.service.impl.UserImpl;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 javax.servlet.http.HttpServletRequest;
 @RestControllerpublic class UserController {
 
    @Autowired
    private  HttpServletRequest request;
 
    @Autowired
    private UserImpl userimpl;
 
     @RequestMapping("/api/login")
    public String Login(User user) {
 
        HttpSession session = request.getSession();
 
        //存入Session        //session.setAttribute("user", user);        //单位为秒，设置为-1时不再失效        //session.setMaxInactiveInterval(60 * 60 * 24 * 30);        //注销登陆        //request.getSession().removeAttribute("user"); 
        return userimpl.UserAll(user).toString();
    }}

注：userDao报红解决方法

SpringBoot整合Mybatis+Druid+数据库（注解版）_SpringBoot_02