Java 如何使用hibernate和JBOSS工具在数据库中添加新记录？

我正在使用Eclipse和JBOSS工具从MySQL生成hibernate类。 工资表有复合键，一个是FK（用户ID），一个是自动递增。所以JBOSS工具生成了Salary和User类，它也生成了SalaryId类。 我已经在User类的GetPalaries方法中添加了cascade，但是当我试图保存新用户时，总是会出现异常： org.hibernate.exception.ConstraintViolationException:无法添加或更新子行：外键约束失败

有人能帮我解决这个问题吗？谢谢大家~

以下是我的表格结构：

CREATE TABLE IF NOT EXISTS `salary` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `userId` int(11) NOT NULL,
 `amount` int(11) NOT NULL,
 `comingDate` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
 PRIMARY KEY (`id`,`userId`),
 KEY `userId` (`userId`)
)

下面是我生成的类： [用户类别]

@Entity
@Table(name = "user", catalog = "lab")
public class User implements java.io.Serializable {

    private Integer id;
    private String name;
    private String password;
    private String email;
    private Set<Salary> salaries = new HashSet<Salary>(0);

    public User() {
    }

    public User(String name, String password, String email, Set<Salary> salaries) {
        this.name = name;
        this.password = password;
        this.email = email;
        this.salaries = salaries;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Integer getId() {
        return this.id;
    }
    public void setId(Integer id) {
        this.id = id;
    }

    @Column(name = "name", nullable = false, length = 100)
    public String getName() {
        return this.name;
    }
    public void setName(String name) {
        this.name = name;
    }

    @Column(name = "password", nullable = false, length = 100)
    public String getPassword() {
        return this.password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    @Column(name = "email", nullable = false, length = 50)
    public String getEmail() {
        return this.email;
    }
    public void setEmail(String email) {
        this.email = email;
    }

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "user", cascade = CascadeType.ALL)
    public Set<Salary> getSalaries() {
        return this.salaries;
    }
    public void setSalaries(Set<Salary> salaries) {
        this.salaries = salaries;
    }
}

以下是JBOSS工具自动生成的：

[工薪阶层]

@Embeddable
public class SalaryId implements java.io.Serializable {

    private int id;
    private int userId;

    public SalaryId() {
    }

    public SalaryId(int id, int userId) {
        this.id = id;
        this.userId = userId;
    }

    @Column(name = "id", nullable = false)
    public int getId() {
        return this.id;
    }

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

    @Column(name = "userId", nullable = false)
    public int getUserId() {
        return this.userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public boolean equals(Object other) {
        if ((this == other))
            return true;
        if ((other == null))
            return false;
        if (!(other instanceof SalaryId))
            return false;
        SalaryId castOther = (SalaryId) other;

        return (this.getId() == castOther.getId())
                && (this.getUserId() == castOther.getUserId());
    }

    public int hashCode() {
        int result = 17;

        result = 37 * result + this.getId();
        result = 37 * result + this.getUserId();
        return result;
    }
}

[主要课程]

transaction = session.beginTransaction();
SalaryId salaryId = new SalaryId();
Set<Salary> salaries = new HashSet<Salary>();

User user = new User();
user.setName("JW");
user.setPassword("123456");
user.setEmail("jjj@jj.cc");

salaries.add(new Salary(salaryId, user, 10000));
user.setSalaries(salaries);

session.save(user);

transaction.commit();

transaction=session.beginTransaction（）；
SalaryId SalaryId=新的SalaryId（）；
Set salaries=新HashSet（）；
用户=新用户（）；
user.setName（“JW”）；
user.setPassword（“123456”）；
user.setEmail（“jjj@jj.cc");
添加（新薪资（salaryId，用户，10000））；
用户设置日历（工资）；
session.save（用户）；
commit（）；

试着这样做：

transaction = session.beginTransaction();
SalaryId salaryId = new SalaryId();
Set<Salary> salaries = new HashSet<Salary>();

User user = new User();
user.setName("JW");
user.setPassword("123456");
user.setEmail("jjj@jj.cc");

session.save(user);

salaries.add(new Salary(salaryId, user, 10000));
//user.setSalaries(salaries);

transaction.commit();

transaction=session.beginTransaction（）；
SalaryId SalaryId=新的SalaryId（）；
Set salaries=新HashSet（）；
用户=新用户（）；
user.setName（“JW”）；
user.setPassword（“123456”）；
user.setEmail（“jjj@jj.cc");
session.save（用户）；
添加（新薪资（salaryId，用户，10000））；
//用户设置日历（工资）；
commit（）；

这将只保存

用户

记录，而不是它的工资，因为如果不将这些对象添加到集合中，hibernate不知道这些对象是否存在。

transaction = session.beginTransaction();
SalaryId salaryId = new SalaryId();
Set<Salary> salaries = new HashSet<Salary>();

User user = new User();
user.setName("JW");
user.setPassword("123456");
user.setEmail("jjj@jj.cc");

session.save(user);

salaries.add(new Salary(salaryId, user, 10000));
//user.setSalaries(salaries);

transaction.commit();