fastjson的值过滤器ValueFilter
原创林天乐 发布于2018-10-15 16:20:25 阅读数 1462 收藏
项目中需要将前端传进的json数据清空值前后空格
两种实现方法
1.土方法 迭代trim()
- RequestContext context = RequestContext.getCurrentContext();
- InputStream in = (InputStream) context.get("requestEntity");
- String body = StreamUtils.copyToString(in, Charset.forName("UTF-8"));
- JSONObject object = JSON.parseObject(body);
- if (object == null) object = new JSONObject();
- jsonParameterTrimObject(object);
- /**
- * 清空JSONObject 值前后空格
- * @param object
- */
- private void jsonParameterTrimObject(JSONObject object){
- for(String str: object.keySet()){
- Object o = object.get(str);
- if(null != o){
- if(o instanceof String){ //值为字符串类型
- object.put(str,((String) o).trim()); //清空值前后空格
- }
- if(o instanceof JSONObject){ //值为JSON对象
- jsonParameterTrimObject((JSONObject)o);
- }
- if(o instanceof JSONArray) { //值为JSON数组
- jsonParameterTrimArray((JSONArray)o);
- }
- }
- }
- }
- /**
- * 清空JSONArray 值前后空格
- * @param array
- */
- private void jsonParameterTrimArray(JSONArray array){
- if(array.size() > 0){
- for(int i=0; i< array.size();i++){
- Object oa = array.get(i);
- if(null != oa){
- if(oa instanceof String){ //值为字符串类型
- array.set(i,((String) oa).trim()); //清空值前后空格
- }
- if(oa instanceof JSONObject){ //值为JSON对象
- jsonParameterTrimObject((JSONObject)oa);
- }
- if(oa instanceof JSONArray) { //值为JSON数组
- jsonParameterTrimArray((JSONArray)oa);
- }
- }
- }
- }
- }
2.使用fastJson 值过滤器
- package cango.scf.com.filter;
- import com.alibaba.fastjson.serializer.ValueFilter;
- public class SimpleValueFilter implements ValueFilter {
- @Override
- public Object process(Object object, String name, Object value) {
- if (value instanceof String) {
- value = ((String) value).trim();
- }
- return value;
- }
- }
- RequestContext context = RequestContext.getCurrentContext();
- InputStream in = (InputStream) context.get("requestEntity");
- if (in == null) {
- in = context.getRequest().getInputStream();
- }
- String body = StreamUtils.copyToString(in, Charset.forName("UTF-8"));
- JSONObject object = JSON.parseObject(body);
- if (object == null) object = new JSONObject();
- body = JSON.toJSONString(object, new SimpleValueFilter());