toJSONString(obj):对象属性值相同显示fail用:toJSONString(obj,SerializerFeature.DisableCircularReferenceDetect)
fastJson.jar API
阿里jar
参考:
===问题效果:
===问题原因:
API toJSONString(obj)自身问题。
参考:
fastjson SerializerFeature详解:
http://blog.csdn.net/u010246789/article/details/52539576
fastjson把对象转化成json避免$ref:
http://blog.csdn.net/u010246789/article/details/52538953====问题解决:===禁用 对象循环引用。。
@Action("CourierAction_findByPage")
public void findByPage(){
System.out.println("=====page...:"+page);
//Pageable pageAble = new PageRequest(page, rows);
Pageable pageAble = new PageRequest(page-1, rows);
Page<Courier> pageData = service.findAll(pageAble );
long total = pageData.getTotalElements();
List<Courier> list = pageData.getContent();
HashMap<String, Object> map = new HashMap<>();
map.put("total", total);
map.put("rows", list);
//map转json
// String json = (String) JSON.toJSON(map);//==######==报错:pageSize必须大于0
//String json = JSON.toJSON(map).toString();//==######==报错:pageSize必须大于0
//String json = JSON.toJSONString(map);//==######==报错:值相同的standard对象属性【对象重用】,页面显示不出来
//===解决:
String json = JSON.toJSONString(map, SerializerFeature.DisableCircularReferenceDetect);//SerializerFeature是个枚举类型。消除循环引用
System.out.println("json:"+json);
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("application/json;charset=utf-8");
try {
response.getWriter().write(json);
} catch (IOException e) {
e.printStackTrace();
}
}