FastJsonUtils 需要fastjson

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang.StringUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.PropertyFilter;
import com.alibaba.fastjson.serializer.SerializerFeature;

/**
 * Json工具
 */
public class FastJsonUtils {

public static final String SUCCESS_MSG = "数据加载成功"; 

private static SerializerFeature[] features = {SerializerFeature.WriteMapNullValue,
 SerializerFeature.WriteNullStringAsEmpty,
 SerializerFeature.WriteNullListAsEmpty,
 SerializerFeature.WriteNullNumberAsZero,
 SerializerFeature.WriteNullBooleanAsFalse,
 SerializerFeature.WriteDateUseDateFormat,
 SerializerFeature.DisableCircularReferenceDetect}; 

/**
 * 生成json返回结果
 */
 public static String resultSuccess(Integer code,String msg,Object data){
 Map<String,Object> rs= new HashMap<String,Object>();
 rs.put("code",code);
 rs.put("msg",StringUtils.isNotEmpty(msg)?msg:SUCCESS_MSG);
 rs.put("data",data==null ? new Object() : data);
 rs.put("error","");
return toString(rs);
 }

public static String resultError(Integer code,String error,code);
 rs.put("data",StringUtils.isNotEmpty(error)?error:"");
return toString(rs);
 }

/**
 * 生成json返回结果
 */
 public static String resultList(Integer code,Integer pageNo,Integer pageSize,data==null ? new Object() : data);
 rs.put("pageNo",pageNo == null ? 0 : pageNo);
 rs.put("pageSize",pageSize == null ? 10 : pageSize);
return toString(rs);
 }

/**
 * 生成json返回结果
 */
 public static String resultFeatures(Integer code,Object data,SerializerFeature... feature){
 Map<String,data==null ? new Object() : data);
return JSON.toJSONString(rs,feature);
 }

/**
 * 生成json返回结果
 */
 public static String resultDate(Integer code,String dateFormat){
 Map<String,data==null ? new Object() : data);
return JSON.toJSONStringWithDateFormat(rs,dateFormat,features);
 }
/**
 * 生成json返回结果,包含字段
 */
 public static String resultIncludes(Integer code,String ...properties){
 Map<String,data==null ? new Object() : data);
return toStringIncludes(rs,properties);
 }

/**
 * 生成json返回结果,包含字段
 */
 public static String resultExcludes(Integer code,Class<?> type,data==null ? new Object() : data);
return toStringExcludes(rs,type,properties);
 }

/**
 * 生成json字符串
 */
 public static String toString(Object data){
return JSON.toJSONString(data,features);
 }

/**
 * 生成json字符串
 */
 private static String toStringIncludes(Object data,String ...properties){
 PropertyFilter filter = new PropertyFilter() {
@Override
 public boolean apply(Object source,String name,Object value) {
if(source.getClass() == HashMap.class && ("code".equals(name) || "data".equals(name) || "msg".equals(name))){
return true;
 }
for(String pro : properties){
if(pro.equals(name)){
return true;
 }
 }
return false;
 }
 };
return JSON.toJSONString(data,filter,features); 
 }

/**
 * 排除字段
 * @param args
 */
 private static String toStringExcludes(Object data,Object value) {
if(source.getClass() == type){
for(String pro : properties){
if(pro.equals(name)){
return false;
 }
 }
 }
return true;
 }
 };
return JSON.toJSONString(data,features);  } }