Java 无法使用spring boot将数据保存到数据库_Java_Hibernate_Spring Boot_Unit Testing

Java 无法使用spring boot将数据保存到数据库

java hibernate spring-boot unit-testing

Java 无法使用spring boot将数据保存到数据库,java,hibernate,spring-boot,unit-testing,Java,Hibernate,Spring Boot,Unit Testing,当我运行测试类public void testCreate（）时，测试运行时没有错误，但我无法将任何数据保存到数据库中我创建了一个Product.java模型类，然后使用创建的ProductRepository.java扩展crudepository.java与MySQL数据库交互我的Spring boot版本是2.2.0.0版本以下是我的课程： Product.java package com.hibernate.productData.entities; import javax

当我运行测试类

public void testCreate（）

时，测试运行时没有错误，但我无法将任何数据保存到数据库中

我创建了一个

Product.java

模型类，然后使用创建的

ProductRepository.java

扩展

crudepository.java

与MySQL数据库交互

我的Spring boot版本是2.2.0.0版本以下是我的课程：

Product.java

package com.hibernate.productData.entities;



import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;



@Entity

@Table

public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    private String name;

    @Column(name="description")
    private String desc;

    private Double price;

    public int getId() {

    return id;

}

public void setId(int id) {this.id = id;}

public String getName() {return name;}

public void setName(String name) {this.name = name;}

public String getDesc() {return desc;}

public void setDesc(String desc) {this.desc = desc;}

public Double getPrice() {return price;}

public void setPrice(Double price) {this.price = price;}

}

package com.hibernate.productData.repository;
import java.util.Optional;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.hibernate.productData.entities.Product;

@Repository
public class ProductRepository implements CrudRepository<Product, Integer>
{
@Override
public <S extends Product> S save(S entity) {
// TODO Auto-generated method stub
return null;
}



@Override

public <S extends Product> Iterable<S> saveAll(Iterable<S> entities) {

// TODO Auto-generated method stub

return null;

}



@Override

public Optional<Product> findById(Integer id) {

// TODO Auto-generated method stub

return null;

}



@Override

public boolean existsById(Integer id) {

// TODO Auto-generated method stub

return false;

}



@Override

public Iterable<Product> findAll() {

// TODO Auto-generated method stub

return null;

}



@Override

public Iterable<Product> findAllById(Iterable<Integer> ids) {

// TODO Auto-generated method stub

return null;

}



@Override

public long count() {

// TODO Auto-generated method stub

return 0;

}



@Override

public void deleteById(Integer id) {

// TODO Auto-generated method stub

}



@Override

public void delete(Product entity) {

// TODO Auto-generated method stub

}



@Override

public void deleteAll(Iterable<? extends Product> entities) {

// TODO Auto-generated method stub

}



@Override

public void deleteAll() {

// TODO Auto-generated method stub

}



}



package com.hibernate.productData;



import org.junit.jupiter.api.Test;

import org.junit.runner.RunWith;

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

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.test.context.junit4.SpringRunner;



import com.hibernate.productData.entities.Product;

import com.hibernate.productData.repository.ProductRepository;



@RunWith(SpringRunner.class)

@SpringBootTest

class ProductDataApplicationTests {



@Autowired

ProductRepository repos;

@Test

void contextLoads() {

}

@Test

public void testCreate()

{

Product p = new Product();

p.setId(1);

p.setName("harry potter");

p.setDesc("Awesome");

p.setPrice(100d);

    repos.save(p);

}

}

ProductRepository.java

package com.hibernate.productData.entities;



import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;



@Entity

@Table

public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    private String name;

    @Column(name="description")
    private String desc;

    private Double price;

    public int getId() {

    return id;

}

public void setId(int id) {this.id = id;}

public String getName() {return name;}

public void setName(String name) {this.name = name;}

public String getDesc() {return desc;}

public void setDesc(String desc) {this.desc = desc;}

public Double getPrice() {return price;}

public void setPrice(Double price) {this.price = price;}

}

package com.hibernate.productData.repository;
import java.util.Optional;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.hibernate.productData.entities.Product;

@Repository
public class ProductRepository implements CrudRepository<Product, Integer>
{
@Override
public <S extends Product> S save(S entity) {
// TODO Auto-generated method stub
return null;
}



@Override

public <S extends Product> Iterable<S> saveAll(Iterable<S> entities) {

// TODO Auto-generated method stub

return null;

}



@Override

public Optional<Product> findById(Integer id) {

// TODO Auto-generated method stub

return null;

}



@Override

public boolean existsById(Integer id) {

// TODO Auto-generated method stub

return false;

}



@Override

public Iterable<Product> findAll() {

// TODO Auto-generated method stub

return null;

}



@Override

public Iterable<Product> findAllById(Iterable<Integer> ids) {

// TODO Auto-generated method stub

return null;

}



@Override

public long count() {

// TODO Auto-generated method stub

return 0;

}



@Override

public void deleteById(Integer id) {

// TODO Auto-generated method stub

}



@Override

public void delete(Product entity) {

// TODO Auto-generated method stub

}



@Override

public void deleteAll(Iterable<? extends Product> entities) {

// TODO Auto-generated method stub

}



@Override

public void deleteAll() {

// TODO Auto-generated method stub

}



}



package com.hibernate.productData;



import org.junit.jupiter.api.Test;

import org.junit.runner.RunWith;

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

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.test.context.junit4.SpringRunner;



import com.hibernate.productData.entities.Product;

import com.hibernate.productData.repository.ProductRepository;



@RunWith(SpringRunner.class)

@SpringBootTest

class ProductDataApplicationTests {



@Autowired

ProductRepository repos;

@Test

void contextLoads() {

}

@Test

public void testCreate()

{

Product p = new Product();

p.setId(1);

p.setName("harry potter");

p.setDesc("Awesome");

p.setPrice(100d);

    repos.save(p);

}

}

应用程序属性

spring.datasource.url=jdbc:mysql://localhost:3306/mydb
spring.datasource.username=root
spring.datasource.password=Pblock@10

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hibernate.productData</groupId>
    <artifactId>productData</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>productData</name>
    <description>Hibernate project</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>


4.0.0
org.springframework.boot
spring启动程序父级
2.2.0.1发布
com.hibernate.productData
产品数据
0.0.1-快照
产品数据
Hibernate项目
1.8
org.springframework.boot
spring引导启动器数据jpa
mysql
mysql连接器java
运行时
org.springframework.boot
弹簧起动试验
测试
org.junit.vintage
朱尼特老式发动机
org.springframework.boot
springbootmaven插件

测试正在运行，没有错误，但我无法将任何数据保存到数据库

我认为这可能是因为您已经覆盖了Crudepository的save方法。我在任何地方都没有见过这样做。尝试将ProductRepository的实现替换为

package com.hibernate.productData.repository;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import com.hibernate.productData.entities.Product;

@Repository
public interface ProductRepository extends CrudRepository<Product, Integer>
{
}

package com.hibernate.productData.repository；
导入org.springframework.data.repository.crudepository；
导入org.springframework.stereotype.Repository；
导入com.hibernate.productData.entities.Product；
@存储库
公共接口ProductRepository扩展了Crudepository
{
}

我认为正在发生的是，正在调用您的save方法的实现，而该实现没有任何作用。

发布您的application.properties和pom.xml，以帮助其他人找到您的问题所在。添加..@chaojunchong当我删除这些方法时，ProductRepository.java给我一个错误，说“add umimplemented methods”提示我从中添加方法CrudRepository@AnantVikramSingh更新了我的答案