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注解的理解

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1

class="cursor-pointer"> 详细描述

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mysql文件夹下ibdata1文件不断增长

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1

数据库

class="cursor-pointer"> 详细描述

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尝试用单元测试对DAO的实现类测试报错

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1

JDBC

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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pagehelper无法进行上一页等操作

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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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springboot+jpa的小demo访问不了

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1

spring

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

@Controller
public class HelloBootController {

    @Autowired
    UserRepository userRepository;

    @Autowired
    User user;

    @RequestMapping("/toHello")
    public String toHello(ModelMap modelMap){
        userRepository.save(new User("Mshu","123456","zhuiqiu95@foxmail.com"));
        List<User> users = userRepository.findAll();
        modelMap.put("users",users);
        return "helloBoot";
    }
__________________________________________________________________________________________________

/**
 * 创建Dao接口, springboot 将接口类会自动注解到spring容器中，
 *  不需要我们做任何配置，只需要继承JpaRepository 即可
 */

public interface UserRepository extends JpaRepository<User,Long> {
}

____________________________________________________________________________________________________
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.properties.hibernate.hbm2ddl.auto=update

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无法创建Spring的文件

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1

spring

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.17.RELEASE</version>
    </dependency>

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>4.3.17.RELEASE</version>
    </dependency>

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.17.RELEASE</version>
    </dependency>

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代码生成的过程中出现,Zip File is closed错误

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1

代码生成

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图