Springboot连接Mycat2

环境准备：

http://t.csdn.cn/zRO5v

创建Springboot项目

1.新建项目：

配置好对应的选项：

选择好对应的springboot版本，和项目自带的默认依赖：

如果你的环境搭建的时候是按照上面的教程搭建，那么请选择MySQL Drive驱动

配置Maven：

如果下载速度慢，请在Maven的/conf/settings.xml文件中配置国内镜像源

等待Mave依赖同步完成。。。。。

将配置文件改为yml后缀

• pom.xml

          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-web</artifactId>
          </dependency>
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>druid-spring-boot-starter</artifactId>
              <version>1.1.10</version>
          </dependency>
  
          <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.42</version>
              <scope>runtime</scope>
          </dependency>
          <dependency>
              <groupId>org.mybatis.spring.boot</groupId>
              <artifactId>mybatis-spring-boot-starter</artifactId>
              <version>2.1.0</version>
          </dependency>
  
  
  

• 修改配置文件.yml

  server:
    port: 8080
  
  spring:
    main:
      allow-bean-definition-overriding: true
    application:
      name: mycat
    # Mycat配置信息
    datasource:
      url: jdbc:mysql://192.168.174.138:8066/TESTDB?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8
      username: root
      password: 123456
      # mybatis是依赖5.*的版本，所以相对于8.*的少个cj；
      driver-class-name: com.mysql.jdbc.Driver
  
  # MyBatis
  mybatis:
    type-aliases-package: com.example.bootmycat.dao
    mapper-locations: classpath:/mapper/*.xml
    configuration:
      map-underscore-to-camel-case: true
  
  

• 新建一个实体类

  /**
   * @author jigua
   * @version 1.0
   * @className Enterprise
   * @description
   * @create 2022/9/27 16:14
   */
  
  public class Enterprise {
  
      private Long id;
  
      private String phone;
  
      private String name;
  
      public Long getId() {
          return id;
      }
  
      public void setId(Long id) {
          this.id = id;
      }
  
      public String getPhone() {
          return phone;
      }
  
      public void setPhone(String phone) {
          this.phone = phone;
      }
  
      public String getName() {
          return name;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  }
  
  
  

• 新建一个dao

import com.example.bootmycat.pojo.Enterprise;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/**
 * @author jigua
 * @version 1.0
 * @className TestDao
 * @description
 * @create 2022/9/27 16:13
 */
@Mapper
public interface TestDao {

    @Select("select * from enterprise")
    List<Enterprise> selectAll();

    @Insert("insert into enterprise(phone,name) values(#{phone},#{name})")
    int add(Enterprise enterprise);
}

• 新建一个controller
  • 示例提供一个查询和一个插入方法

import com.example.bootmycat.dao.TestDao;
import com.example.bootmycat.pojo.Enterprise;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.UUID;

/**
 * @author jigua
 * @version 1.0
 * @className TestController
 * @description
 * @create 2022/9/27 16:15
 */
@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private TestDao testDao;

    @GetMapping("/selectAll")
    @ResponseBody
    public List<Enterprise> selectAll() {
        List<Enterprise> enterprises = testDao.selectAll();

        return enterprises;
    }

    @GetMapping("/insert")
    @ResponseBody
    public String insert() {
        Enterprise enterprise = new Enterprise();
        String name = UUID.randomUUID().toString().replaceAll("-", "");
        enterprise.setName(name);
        enterprise.setPhone(name.substring(0, 3));
        int i = testDao.add(enterprise);
        if (i > 0) {
            return "success";
        }
        return "fail";
    }
}

最终文件目录结构图：

测试插入

• http://localhost:8080/test/insert

多次测试查询

• http://localhost:8080/test/selectAll
• 获取一个zhang3，一个li4不同的结果，证明mycat读写分离成功