hibernate对象懒加载，json序列化失败

//net.sf.json 解决办法

JsonConfig config = new JsonConfig();
config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);
config.setExcludes(new String[]{"handler","hibernateLazyInitializer"});
//原文：https://zhidao.baidu.com/question/504539752.html
```

//fastjson解决办法

```package com.pbh.aop;

import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.proxy.LazyInitializer;

import com.alibaba.fastjson.serializer.PropertyFilter;

public class SimplePropertyFilter implements PropertyFilter {

@Override
public boolean apply(Object object, String name, Object value) {
if (value instanceof HibernateProxy) {//hibernate代理对象
LazyInitializer initializer = ((HibernateProxy) value).getHibernateLazyInitializer();
if (initializer.isUninitialized()) {
return false;
}
} else if (value instanceof PersistentCollection) {//实体关联集合一对多等
PersistentCollection collection = (PersistentCollection) value;
if (!collection.wasInitialized()) {
return false;
}
Object val = collection.getValue();
if (val == null) {
return false;
}
}
return true;
}
}

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String json = JSON.toJSONString(tags, filter);

```
SimplePropertyFilter filter = new SimplePropertyFilter();
String json = JSON.toJSONString(tags, filter);