Dowemo
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double converts to json, automatically assigns value 0. 0 to empty.
Handle:

JsonConfig jsonConfig = new JsonConfig();
jsonConfig.registerDefaultValueProcessor(Double.class, new DefaultDefaultValueProcessor() {
 public Object getDefaultValue(Class type) {return"";
 }
});//配置一个config,当double类型的数据为空的时候默认是空JSONObject jsonOject =JSONObject.fromObject(personInfo,jsonConfig);



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