使用额外列的多对多hibernate映射？

Question

您好，我有多对多映射，在联接表中有额外的列。表结构如下所示。

table vendor{vendor_id, vendor_name, vendor_password, etc...}
table student{student_id, student_name, student_password, etc..}
table test{test_id, test_subject, test_price,test_level, etc..}

关系如下

vendor to test --> many-to-many
student to test --> many-to-many

链接

table vendor_student_test{vendor_id, student_id, test_id, purchasedDate, assignedDate, writtenDate, result}

我创建了如下POJO类

1. Vendor.java

public class Vendor {
Long vendorId;
Set<VendorStudentTest> tests;
//set and get
}

1. 学生。爪哇

public class Student{
Long studentId;
Set<VendorStudentTest> tests;
//set and get
}

1. 测试。爪哇

public class Test{
Long test_id;
double test_price;
//set and get and remaining fields
}

1. 供应商est.java

public class VendorStudentTest{
public VendorStudentTestPK vendorStudentTestPK;
Date purchasedDate;
Date assignDate;
Date writtenDate;
double result;
//set and get accordingly
}

1. 供应商学生测试PK。爪哇

public class VendorStudentTestPK{
Long vendor_id;
Long student_id;
Long test_id;
}

Hibernate映射文件，如下所示

vendor.hbm.xml

<set name="tests" table="vendor_student_test"
                inverse="true" lazy="true" fetch="select">
            <key>
                <column name="vendor_id" not-null="true" />
            </key>
            <one-to-many class="VendorStudentTest" />
        </set>

vendor\u student\u测试。hbm。xml

    <composite-id name="vendorStudentTestPK"
        class="com.onlineexam.model.VendorStudentTestPK">

        <key-property name="vendor" column="vendor_id"
            type="java.lang.Long" />
        <key-property name="student" column="student_id"
            type="java.lang.Long" />
        <key-property name="test" column="test_id" type="java.lang.Long" />

    </composite-id>

大学生hbm。xml

<set name="tests" table="vendor_student_test"
                inverse="true" lazy="true" fetch="select">
            <key>
                <column name="student_id" not-null="true" />
            </key>
            <one-to-many class="VendorStudentTest" />
        </set>

测验hbm。xml

//this is mapped to other table 

我刚开始Hibernate，这是正确的映射吗？

Answer 1

可在此处找到带有注释案例的解决方案

如何从联接表中为其他属性创建多对多Hibernate映射？

使用xml文件的解决方案可以在这里找到：映射相同的类关系

这里：

映射相同的类关系-延续