Springboot项目搭建(2)-整合数据库

源码地址:https://github.com/VioletSY/article-base

1：创建一个基本项目：https://www.cnblogs.com/excellencesy/p/12522248.html

2：整合oracle：

（1）添加依赖（pom.xml）：

        <!--jdbc -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.oracle/ojdbc6 -->
        <dependency>
            <groupId>com.jslsolucoes</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.1.0</version>
        </dependency>

（2）数据库信息配置(application.properties)：

spring.datasource.url=jdbc:oracle:thin:@127.0.0.1:1521:shitan
spring.datasource.username=xzzc
spring.datasource.password=xzzc
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver

3，整合MySQL

（1）添加依赖（pom.xml）：

        <!-- mysql驱动  -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

（2）数据库信息配置(application.properties)：

#MySQL数据源
spring.datasource.url=jdbc:mysql://localhost:3306/base?useUnicode=true&characterEncoding=utf8
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456

注：我写的事单数据源，在测试完连接Oracle的功能后就把oracle的配置注释了

4，数据库连接池配置

（1）添加依赖（pom.xml）：

        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</version>
        </dependency>

 （2）添加mybatis依赖

        <!-- Spring-Mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>

（3）添加配置类（DBConfig.java）：

@MapperScan(basePackages = "com.googosoft.dao"):将com.googosoft.dao包中的接口/类加上@Mapper注解，从而将该包下的接口/类是注入到spring容器中。

dataSource() ：该方法通过@Bean，将其返回值new DruidDataSource()注入到spring容器中。

@Configuration
@MapperScan(basePackages = "com.googosoft.dao")
public class DBConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean(initMethod = "init", destroyMethod = "close", name = "dataSource")
    public DruidDataSource dataSource() {
        return new DruidDataSource();
    }
}

5，写一个简单的CRUD

（1）准备一个数据库，新建user表：

（2）pojo:

package com.googosoft.pojo;

public class User {
    private String id;
    private String name;
    private String password;
    
    public String getId() {
        return id;
    }
    public void setId(String 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;
    }
    
}

（3）dao层

package com.googosoft.dao.user;

import java.util.List;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import com.googosoft.pojo.User;

public interface UserDao {
 
    @Insert("INSERT INTO USER ( id, NAME ) VALUES ( #{id}, #{name} )")
    public int addUser(User user);

    @Delete("DELETE FROM USER WHERE    id = #{id}")
    public int deleteUser(@Param("id")String id);

    @Select("select id,name from user")
    public List<User> getUserList();

    @Update("update user set name=#{name} where id=#{id}")
    public int updateUser(@Param("id")String id,@Param("name")String name);

}

（4）service层

package com.googosoft.service.user;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.googosoft.dao.user.UserDao;
import com.googosoft.pojo.User;

@Service
public class UserService {

    @Autowired
    private  UserDao userDao;
    
    public int addUser(User user) {
        return userDao.addUser(user);
    }
    
    public int deleteUser(String id) {
        return userDao.deleteUser(id);
    }
    
    public List<User> getUserList() {
        return userDao.getUserList();
    }
    
    public int updateUser(String id,String name) {
        return userDao.updateUser(id,name);
    }
}

（5）controller层

package com.googosoft.controller.user;

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.googosoft.pojo.User;
import com.googosoft.service.user.UserService;

@RestController
@RequestMapping("user")
public class UserController {
    @Autowired
    UserService service;

    @RequestMapping("test")
    public String test(String id,String name){
        return "test";
    }
    
    @RequestMapping("addUser")
    public int addUser(String id,String name){
        User user = new User();
        user.setId(id);
        user.setName(name);
        return service.addUser(user);
    }
    
    @RequestMapping("deleteUser")
    public int deleteUser(String id){
        return service.deleteUser(id);
    }
    
    @RequestMapping("getUserList")
    public List<User> getUserList(){
        return service.getUserList();
    }
    
    @RequestMapping("updateUser")
    public int updateUser(String id,String name){
        return service.updateUser(id,name);
    }
}

 （6）简单的测试

（1）查列表：http://127.0.0.1:8089/user/getUserList

（2）添加：http://127.0.0.1:8089/user/addUser?id=002&name=lisi

（3）更新：http://127.0.0.1:8089/user/updateUser?id=002&name=zhangsan

（4）删除：http://127.0.0.1:8089/user/deleteUser?id=002