SpringBoot - 整合Mybatis+Druid+数据库(注解版)

迈不过友情╰ 2021-12-14 05:15 318阅读 0赞

运行展示

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

<dependency>  
    <groupId>org.mybatis.spring.boot</groupId>  
    <artifactId>mybatis-spring-boot-starter</artifactId>  
    <version>1.3.2</version>  
</dependency>  
   
  
<dependency>  
    <groupId>mysql</groupId>  
    <artifactId>mysql-connector-java</artifactId>  
</dependency>  
   
  
  
   
  
<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:defaultAutoCommit  
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource  
spring.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:test  
spring.datasource.username=root  
spring.datasource.password=root  
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver  
spring.datasource.initialSize=20  
spring.datasource.maxActive=50  
spring.datasource.minIdle=10  
\#spring.datasource.maxWait=60000  
\#spring.datasource.minEvictableIdleTimeMillis=3600000  
spring.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，小编感觉比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;  
   
@Service  
public 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;  
   
@RestController  
public 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

注：启动类加入注解@MapperScan("路径)  
小编这是Java web项目，@Controller注解是界面、@RestController是写接口  
\---------------------   
作者：沐荔   
来源：CSDN   
原文：https://blog.csdn.net/qq\_41920732/article/details/85936063   
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