有三个类
班级 classes
小组 group
学生 student
班级和小组是一对多双向级联
小组和学生是一对多双向年级联
在hibernate做删除小组操作时,会把不相关的班级信息全部删掉,还会报错
Could not execute JDBC batch update
感觉应该是注解写的有问题
配置如下
classes{
List list;
@OneToMany( cascade = CascadeType.ALL, fetch = FetchType.LAZY)
public List getList() {
return symbols;
}
public void setSymbols(List list) {
this.list = list;
}
}
group{
private classes cl;
private List list;
@OneToMany( cascade = CascadeType.ALL, fetch = FetchType.LAZY)
public List getList() {
return symbols;
}
public void setSymbols(List list) {
this.list = list;
}
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
public classes getCl() {
return cl;
}
public void setClasses(classes cl) {
this.cl = cl;
}
}
student{
private group gp;
@ManyToOne( cascade = CascadeType.ALL, fetch = FetchType.LAZY)
public group getGp() {
return gp;
}
public void setGp(group gb) {
this.gp = gp;
}
}
