public class Emploee {
private Integer empId;
private String empName;
private Set<ProEmp> proemp=new HashSet<ProEmp>(); //集合的类型为中间的实体类类型
public Set<ProEmp> getProemp() {
return proemp;
}
public void setProemp(Set<ProEmp> proemp) {
this.proemp = proemp;
}
public Integer getEmpId() {
return empId;
}
public void setEmpId(Integer empId) {
this.empId = empId;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
}
package cn.manytomany.doubleanother;
import java.util.HashSet;
import java.util.Set;
public class Project {
private Integer proId;
private String proName;
//集合的类型依然为中间的实体类类型
private Set<ProEmp> proemp=new HashSet<ProEmp>();
public Set<ProEmp> getProemp() {
return proemp;
}
public void setProemp(Set<ProEmp> proemp) {
this.proemp = proemp;
}
public Integer getProId() {
return proId;
}
public void setProId(Integer proId) {
this.proId = proId;
}
public String getProName() {
return proName;
}
public void setProName(String proName) {
this.proName = proName;
}
}
1.1 补充的中间实体类
package cn.manytomany.doubleanother;
public class ProEmp {
private Integer id;
private Emploee emp;
private Project pro;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Emploee getEmp() {
return emp;
}
public void setEmp(Emploee emp) {
this.emp = emp;
}
public Project getPro() {
return pro;
}
public void setPro(Project pro) {
this.pro = pro;
}
}
2. 接下来就是小配置了,跟第一个方案格式几乎是一样的,就不过多解释了,直接来看小配置就行了。
因为我们要用中间实体类来关联，所以雇员类（Emploee）和工程类(Project)没有什么眼添加的,只需按照正常的配置即可。
2.1 emploees.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.manytomany.doubleanother">
<class table="Emploee">
<id>
<generator>
<param>SQU_NUM</param>
</generator>
</id>
<property></property>
</class>
</hibernate-mapping>
2.2 emploees.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.manytomany.doubleanother">
<class table="PROJECT">
<id>
<generator>
<param>SQU_NUM</param>
</generator>
</id>
<property></property>
</class>
</hibernate-mapping>
2.3 关键就在于 proemp.hbm.xml (把多对多关联转化成两个多对一来关联)