Java 使用springboot和hibernate从mysql数据库检索的日志数据出现问题
我试图使用Springboot REST api从mysql数据库检索日志,但是日志是多次重复的,而不是一行。我的数据库中只有一行数据,但当使用GET调用它时,它会作为重复日志出现。检查图片以查看它: 下面是生成这些日志的实体类的代码。第一个是用户日志:Java 使用springboot和hibernate从mysql数据库检索的日志数据出现问题,java,spring,hibernate,spring-boot,jpa,Java,Spring,Hibernate,Spring Boot,Jpa,我试图使用Springboot REST api从mysql数据库检索日志,但是日志是多次重复的,而不是一行。我的数据库中只有一行数据,但当使用GET调用它时,它会作为重复日志出现。检查图片以查看它: 下面是生成这些日志的实体类的代码。第一个是用户日志: package com.dafe.spring.applogger.entity; import java.util.ArrayList; import java.util.List; import javax.persistence.C
package com.dafe.spring.applogger.entity;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="log")
public class UserLog {
//define field
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id")
private int id;
@Column(name="user_id")
private String userId;
@Column(name="session_id")
private String sessionId;
@OneToMany(mappedBy="userLog",cascade=CascadeType.ALL)
private List<Action>action;
//define constructors
public UserLog() {
}
public UserLog(String userId, String sessionId) {
this.userId = userId;
this.sessionId = sessionId;
}
//define getters and setters
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getSessionId() {
return sessionId;
}
public void setSessionId(String sessionId) {
this.sessionId = sessionId;
}
public List<Action> getAction() {
return action;
}
public void setAction(List<Action> action) {
this.action = action;
}
@Override
public String toString() {
return "Log [userId=" + userId + ", sessionId=" + sessionId + "]";
}
}
下面是dao实现类
package com.dafe.spring.applogger.dao;
import java.util.List;
import javax.persistence.EntityManager;
import org.hibernate.Session;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.dafe.spring.applogger.entity.UserLog;
@Repository
public class UserLogDaoHibernateImplementation implements UserLogDAO {
//define field for entity manager
private EntityManager entityManager;
//set up constructor injection
@Autowired
public UserLogDaoHibernateImplementation(EntityManager theEntityManager) {
entityManager= theEntityManager;
}
@Override
public List<UserLog> findAll() {
//get the current hibernate session from entity manager
Session currentSession = entityManager.unwrap(Session.class);
//create a query
Query <UserLog> theQuery =
currentSession.createQuery("from UserLog", UserLog.class);
//execute query and get result list
List<UserLog> userLog = theQuery.getResultList();
//return the results
return userLog;
}
@Override
public UserLog findById(int theId) {
//get the current session
Session currentSession = entityManager.unwrap(Session.class);
//get the userLog
UserLog userLog =
currentSession.get(UserLog.class, theId);
//return the userLog
return null;
}
@Override
public void save(UserLog theUserLog) {
//get the current session
Session currentSession = entityManager.unwrap(Session.class);
//save
currentSession.saveOrUpdate(theUserLog);
}
@Override
public void deleteById(int theId) {
//get the current hibernate session
Session currentSession = entityManager.unwrap(Session.class);
//delete object with primary key
Query theQuery =
currentSession.createQuery("delete from log where id=:theuserId");
theQuery.setParameter("theuserId", theId);
theQuery.executeUpdate();
}
}
package com.dafe.spring.applogger.dao;
导入java.util.List;
导入javax.persistence.EntityManager;
导入org.hibernate.Session;
导入org.hibernate.query.query;
导入org.springframework.beans.factory.annotation.Autowired;
导入org.springframework.stereotype.Repository;
导入org.springframework.transaction.annotation.Transactional;
导入com.dafe.spring.applogger.entity.UserLog;
@存储库
公共类UserLogDAO HibernateImplementation实现UserLogDAO{
//为实体管理器定义字段
私人实体管理者实体管理者;
//设置构造函数注入
@自动连线
公共用户LogDaoHibernateImplementation(实体管理器实体管理器){
实体管理器=实体管理器;
}
@凌驾
公共列表findAll(){
//从实体管理器获取当前休眠会话
会话currentSession=entityManager.unwrap(会话.class);
//创建查询
查询查询=
currentSession.createQuery(“来自UserLog”,UserLog.class);
//执行查询并获取结果列表
List userLog=theQuery.getResultList();
//返回结果
返回用户日志;
}
@凌驾
公共用户日志findById(int-theId){
//获取当前会话
会话currentSession=entityManager.unwrap(会话.class);
//获取用户日志
用户日志用户日志=
获取(UserLog.class,theId);
//返回用户日志
返回null;
}
@凌驾
公共作废保存(用户日志用户日志){
//获取当前会话
会话currentSession=entityManager.unwrap(会话.class);
//拯救
currentSession.save或update(用户日志);
}
@凌驾
公共void deleteById(intheid){
//获取当前休眠会话
会话currentSession=entityManager.unwrap(会话.class);
//使用主键删除对象
查询查询=
createQuery(“从日志中删除,其中id=:theuserId”);
setParameter(“theuserId”,theId);
executeUpdate();
}
}
和其余的控制器
package com.dafe.spring.applogger.rest;
import java.util.List;
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.RestController;
import com.dafe.spring.applogger.dao.UserLogDAO;
import com.dafe.spring.applogger.entity.UserLog;
// this api selects all the
@RestController
@RequestMapping("/api")
public class UserLogRestController {
@Autowired
private UserLogDAO userLogDao;
//inject logDao using constructor injection
public UserLogRestController(UserLogDAO theUserLogDao) {
}
//expose logs and return list of logs
@GetMapping("/userLog")
public List<UserLog> findAll(){
return userLogDao.findAll();
}
}
包com.dafe.spring.applogger.rest;
导入java.util.List;
导入org.springframework.beans.factory.annotation.Autowired;
导入org.springframework.web.bind.annotation.GetMapping;
导入org.springframework.web.bind.annotation.RequestMapping;
导入org.springframework.web.bind.annotation.RestController;
导入com.dafe.spring.applogger.dao.UserLogDAO;
导入com.dafe.spring.applogger.entity.UserLog;
//此api选择所有
@RestController
@请求映射(“/api”)
公共类UserLogRestController{
@自动连线
私有UserLogDAO UserLogDAO;
//使用构造函数注入注入logDao
公共UserLogRestController(UserLogDAO theUserLogDao){
}
//公开日志并返回日志列表
@GetMapping(“/userLog”)
公共列表findAll(){
返回userLogDao.findAll();
}
}
请帮我弄清楚。提前感谢我最近遇到了这个问题,我已经修复了将这个附件放在@JsonIgnore上的问题 在人际关系方面,如果它对你也适用,你可以试试
@JsonIgnore
@ManyToOne
@JoinColumn(name="log_id")
private UserLog userLog;
@JsonIgnore
@OneToMany(mappedBy="userLog",cascade=CascadeType.ALL)
private List<Action>action;
@JsonIgnore
@许多酮
@JoinColumn(name=“log\u id”)
私有用户日志;
@杰索尼奥雷
@OneToMany(mappedBy=“userLog”,cascade=CascadeType.ALL)
私人诉讼;
@JsonIgnore
@ManyToOne
@JoinColumn(name="log_id")
private UserLog userLog;
@JsonIgnore
@OneToMany(mappedBy="userLog",cascade=CascadeType.ALL)
private List<Action>action;