Java hibernate不断更新第一条记录的值，而不是创建新记录

我的主键设置了一个自动增量，但当我执行“保存在while循环”时，它会插入主键为1的第一个数据，第二个数据不会作为主键2插入，而是更新主键为1的记录1

所以我得到了

2017-01-01 00:00:11.763|192.168.234.82|"GET / HTTP/1.1"|200|"swcd (unknown version) CFNetwork/808.2.16 Darwin/15.6.0"
Hibernate: insert into log_bean (date_time, ip_address, request, status, user_agent) values (?, ?, ?, ?, ?)
2017-01-01 00:00:21.164|192.168.234.82|"GET / HTTP/1.1"|200|"swcd (unknown version) CFNetwork/808.2.16 Darwin/15.6.0"
Hibernate: select logbean0_.id as id1_0_0_, logbean0_.date_time as date_tim2_0_0_, logbean0_.ip_address as ip_addre3_0_0_, logbean0_.request as request4_0_0_, logbean0_.status as status5_0_0_, logbean0_.user_agent as user_age6_0_0_ from log_bean logbean0_ where logbean0_.id=?
Hibernate: update log_bean set date_time=?, ip_address=?, request=?, status=?, user_agent=? where id=?
2017-01-01 00:00:23.003|192.168.169.194|"GET / HTTP/1.1"|200|"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393"
Hibernate: select logbean0_.id as id1_0_0_, logbean0_.date_time as date_tim2_0_0_, logbean0_.ip_address as ip_addre3_0_0_, logbean0_.request as request4_0_0_, logbean0_.status as status5_0_0_, logbean0_.user_agent as user_age6_0_0_ from log_bean logbean0_ where logbean0_.id=?
Hibernate: update log_bean set date_time=?, ip_address=?, request=?, status=?, user_agent=? where id=?
2017-01-01 00:00:40.554|192.168.234.82|"GET / HTTP/1.1"|200|"swcd (unknown version) CFNetwork/808.2.16 Darwin/15.6.0"

更新而不是插入 这是我的密码

public void readFile(LogBean logBean) throws IOException {

        Scanner read = new Scanner(
            new File(
                "/home/user/MyProjects/java-recruitment-task/parserproject/src/main/resources/access.txt"));

        while (read.hasNext()) { //checks if there is a valid token

            String string = read.nextLine();
            System.out.println(string);

            Scanner readFileByLine = new Scanner(string);

            while (readFileByLine.hasNext()) { //checks valid token if not then goes out of loop
                String[] split = readFileByLine.nextLine().split("\\|");

                logBean.setDateTime(LocalDateTime.parse(split[0], DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS")));
                logBean.setIp_address(split[1]);
                logBean.setRequest(split[2]);
                logBean.setStatus(split[3]);
                logBean.setUserAgent(split[4]);
            }
            logbeanRepository.save(logBean);
        }

    }

我的豆子是

@Entity
public class LogBean {

    @Id
    @Column(name = "id", updatable = false, nullable = false)
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

我做错了什么？这是在spring boot中，因此my db属性是app.properties

您每次都使用相同的“logBean”项

由于您试图保存相同的对象，即使您修改了属性，它也是相同的项，这就是为什么在保存它时，hybernate会更新该项，而不是创建一个新项

要解决此问题，请将方法更改为：

public void readFile() throws IOException {

    Scanner read = new Scanner(
        new File(
            "/home/user/MyProjects/java-recruitment-task/parserproject/src/main/resources/access.txt"));

    while (read.hasNext()) { //checks if there is a valid token

        String string = read.nextLine();
        System.out.println(string);

        Scanner readFileByLine = new Scanner(string);

        while (readFileByLine.hasNext()) { //checks valid token if not then goes out of loop
            String[] split = readFileByLine.nextLine().split("\\|");
            LogBean logBean = new LogBean();

            logBean.setDateTime(LocalDateTime.parse(split[0], DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS")));
            logBean.setIp_address(split[1]);
            logBean.setRequest(split[2]);
            logBean.setStatus(split[3]);
            logBean.setUserAgent(split[4]);
        }
        logbeanRepository.save(logBean);
    }

}

---

在

readFile

内部创建一个新的LogBean实例，而不是将其传递给该方法？正如Joakim指出的，当您只是不断地重新设置（更新）一个对象（行）的值时，为什么您希望生成新的记录？您的意思是在while循环中我应该创建一个新的LogBean实例@是的，请参见下面的解决方案