Question

我是springboot，hibernate和jpa的完全新手。我早些时候发布了一个问题，但是以某种方式解决了这个问题，但是现在我陷入了另一个巨大的错误。

我试图从同一个数据库中获得两个单独的表。两个都有自己的模型和存储库类。当仅处理一个表但处理两个表时，该代码流畅运行：

2019-06-16 00:38:12.178  INFO 14868 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.0.12.Final}
2019-06-16 00:38:12.180  INFO 14868 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2019-06-16 00:38:12.181  INFO 14868 --- [           main] org.hibernate.cfg.Environment            : HHH000021: Bytecode provider name : javassist
2019-06-16 00:38:12.226  WARN 14868 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/hibernate/metamodel/source/annotations/JPADotNames
Sun Jun 16 00:38:12 IST 2019 WARN: Caught while disconnecting...  goes on and on....

applications.yml

spring:

  datasource:
    url: jdbc:mysql://localhost:3306/test_schema
    username: root
    password: user
    driverClassName: com.mysql.jdbc.Driver

  jpa:

    generate-ddl: true
    show-sql: true

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.techprimers.db</groupId>
    <artifactId>spring-boot-mysqldb</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>spring-boot-cleardb</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.0</version>
</dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.3.8.Final</version>
</dependency>

    <dependency>
    <groupId>org.hibernate.common</groupId>
    <artifactId>hibernate-commons-annotations</artifactId>
    <version>5.0.1.Final</version>
</dependency>
    <dependency>
    <groupId>javax.xml.bind</groupId>
     <artifactId>jaxb-api</artifactId>
    <version>2.3.0</version>
</dependency>
    </dependencies>

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


</project>

InterestDao.java-道类1

package com.techprimers.db.dao;

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

import com.techprimers.db.model.Interest;
import com.techprimers.db.repository.InterestRepository;

@Service
public class InterestDao{


    @Autowired
    InterestRepository interrepo;

    public Interest findOne(String token) {
        return interrepo.findOne(token);
    }

}

usersdao.java-道2类

package com.techprimers.db.dao;


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


import com.techprimers.db.model.Users;
import com.techprimers.db.repository.UsersRepository;

@Service
public class userdao {


    @Autowired
    UsersRepository userrepo;

    public Users findOne(String token) {
        return userrepo.findOne(token);
    }



}

Interest.java-模型类别1

package com.techprimers.db.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;

import org.springframework.stereotype.Repository;

@Repository
@Entity
@Table(name="hb_interest")
public class Interest{

    @Column(name="ticket_no")
    private String ticket_no;

    @Column(name="hb_type")    
    private String hb_type;

    @Column(name="hb_unit_hints")
    private String hb_unit_hints;

    @Column(name="hb_value")
    private float hb_value;

    public Interest() {
    }



    //getters and setters......


    @Override
    public String toString() {
        return "{" +
                "\"ticket_no\":" +"\"" + ticket_no + "\""+"," +
                "\"Genre\":" +"\""+ hb_type + "\""+","+
                "\"Powers\":"+"\"" + hb_unit_hints +"\""+
                "\"Characters_No\":"+"\"" + hb_value +"\""+
                '}';
    }


}

Users.java模型类2

package com.techprimers.db.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

import org.springframework.stereotype.Repository;


@Repository
@Entity
@Table(name="persons")
public class Users {


    @Column(name = "id")
    private Integer id;
    @Column(name = "name")
    private String name;

    @Id
    @Column(name = "token_id")
    private String teamName;
    @Column(name = "salary")
    private Integer salary;

    public Users() {
    }

  //getters and setters....


    @Override
    public String toString() {
        return "{" +
                "\"id\":" +"\"" + id + "\""+"," +
                "\"value\":" +"\""+ name + "\""+","+
                "\"Anime\":"+"\"" + teamName +"\""+
                '}';
    }

}

InterestRepository.java

package com.techprimers.db.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import com.techprimers.db.model.Interest;



public interface InterestRepository extends JpaRepository<Interest, String> {

}

UsersRepository.java

package com.techprimers.db.repository;

import com.techprimers.db.model.Users;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UsersRepository extends JpaRepository<Users, String> {
}

UsersResource.java控制器类

package com.techprimers.db.resource;

import com.techprimers.db.dao.InterestDao;
import com.techprimers.db.dao.userdao;

import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping(value = "/rest/users")
public class UsersResource {

    @Autowired
    userdao userDao;
    InterestDao interdao;

    @Autowired
    ProcessData pd;

     @GetMapping("/persons")
     public JSONObject loadPersons(@RequestParam("access_token") String access_token) throws  ParseException{
        String decode_token = pd.testDecodeJWT(access_token); // Function to decode the access token
        String token = pd.jsondata(decode_token);//Fetch the token from the decoded access token
        String data= userDao.findOne(token).toString();//Convert the response data from table 1 to JSON String.
        String med= interdao.findOne(token).toString();//Convert the response data from table 2 to JSON String

//Converting JSON String to JSON Objects
        JSONObject  json_data=pd.responseData(data);
        JSONObject  json_med=pd.responseData(med);
//Was only trying to return the 1st table data but the code stopped working.
        return json_data;
     }


}

我不知道错误的原因。我添加了外部休眠的jar容器，但这也没有用。预先感谢。

Answer 1

您不得指定与Spring Boot不同的Hibernate版本。

Spring Boot使用：5.0.12.Final

删除

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-entitymanager</artifactId>
  <version>4.3.8.Final</version>
</dependency>

java.lang.NoClassDefFoundError：org / hibernate / metamodel / source / annotations / JPADotNames错误

1 个答案: