JPA 级联更新去孤子
class A{ private Set<B> bs = new HashSet<B>();@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "flowNode", orphanRemoval = true)@OrderBy(clause = "id")public Set<B> getBs() {return bs;}}

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调用操作代码：

A a = new A();Set<B> bs = new HashSet<B>();bs.add(...)a.getBs().clear();a.getBs().addAll(bs);

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