fastjson null值转换为“”
package test.json;import java.sql.Date;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.JSONSerializer;import com.alibaba.fastjson.serializer.SerializeWriter;import com.alibaba.fastjson.serializer.SerializerFeature;import com.alibaba.fastjson.serializer.ValueFilter;/** * @author 魏斌 * @version 创建时间：2013-2-25 下午08:47:58 */public class JSONDemo {public static String toJSONString(Object object, SerializerFeature ...features) {SerializeWriter out = new SerializeWriter();String s;JSONSerializer serializer = new JSONSerializer(out);SerializerFeature arr$[] = features;int len$ = arr$.length;for (int i$ = 0; i$ < len$; i$++) {SerializerFeature feature = arr$[i$];serializer.config(feature, true);}serializer.getValueFilters().add(new ValueFilter() {public Object process(Object obj, String s, Object value) {if(null!=value) {if(value instanceof java.util.Date) {return String.format("%1$tF %1tT", value);}return value;}else {return "";}}});serializer.write(object);s = out.toString();out.close();return s;}public static void main(String[] args) {List list = new ArrayList();for (int i = 0; i <= 20; i++) {Map m = new HashMap();m.put(String.valueOf(i), null);m.put("date", new Date(System.currentTimeMillis()));list.add(m);}String json = JSONDemo.toJSONString(list);System.err.println(json);List<Map> parse = (List<Map>) JSON.parse(json);System.err.println("end ....");}}
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