json-lib出现There is a cycle in the hierarchy解决办法

摘要：解决办法1.设置JSON-LIB让其过滤掉引起循环的字段。Java代码复制代码代码如下:JsonConfigconfig=newJsonCo...

解决办法

1.设置JSON-LIB让其过滤掉引起循环的字段。

Java代码

复制代码代码如下:

JsonConfig config = new JsonConfig();

config.setIgnoreDefaultExcludes(false);

config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);

config.registerJsonValueProcessor(Date.class,new DateJsonValueProcessor("yyyy-MM-dd")); //date processor register

config.setExcludes(new String[]{//只要设置这个数组，指定过滤哪些字段。

"consignee",

"contract",

"coalInfo",

"coalType",

"startStation",

"balanceMan",

"endStation"

});

String tempStr = "{"TotalRecords":"+ total.toString() +","Datas":"+JSONSerializer.toJSON(list,config).toString()+"}";

out.print(tempStr);

JsonConfig config = new JsonConfig();

config.setIgnoreDefaultExcludes(false);

config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);

config.registerJsonValueProcessor(Date.class,new DateJsonValueProcessor("yyyy-MM-dd")); //date processor register

config.setExcludes(new String[]{//只要设置这个数组，指定过滤哪些字段。 "consignee", "contract", "coalInfo", "coalType", "startStation", "balanceMan", "endStation" }); String tempStr = "{"TotalRecords":"+ total.toString() +","Datas":"+JSONSerializer.toJSON(list,config).toString()+"}"; out.print(tempStr);

2.设置JSON-LIB的setCycleDetectionStrategy属性让其自己处理循环，省事但是数据过于复杂的话会引起数据溢出或者效率低下。

Java代码

[code]

JsonConfig config = new JsonConfig();

config.setIgnoreDefaultExcludes(false);

config.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);

config.registerJsonValueProcessor(Date.class,new DateJsonValueProcessor("yyyy-MM-dd")); //date processor register

String tempStr = "{"TotalRecords":"+ total.toString() +","Datas":"+JSONSerializer.toJSON(list,config).toString()+"}";

out.print(tempStr);

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