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,Object data){
       Map<String,Object> rs= new HashMap<String,Object>();
       rs.put("code",code);
       rs.put("data", data==null ? new Object() : data);
       rs.put("error",StringUtils.isNotEmpty(error)?error:"");
       return toString(rs);
   }
   
    /**
    * 生成json返回结果
    */
   public static String resultList(Integer code,String msg,Integer pageNo,Integer pageSize,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("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,String msg,Object data,SerializerFeature... feature){
      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);
       return JSON.toJSONString(rs, feature);
   }
   
   /**
    * 生成json返回结果
    */
   public static String resultDate(Integer code,String msg,Object data,String dateFormat){
       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);
       return JSON.toJSONStringWithDateFormat(rs, dateFormat, features);
   }
   /**
    * 生成json返回结果,包含字段
    */
   public static String resultIncludes(Integer code,String msg,Object data,String ...properties){
       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);
       return toStringIncludes(rs,properties);
   }
   
   /**
    * 生成json返回结果,包含字段
    */
   public static String resultExcludes(Integer code,String msg,Object data,Class<?> type,String ...properties){
       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);
       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,Class<?> type,String ...properties){
       PropertyFilter filter = new PropertyFilter() {
            @Override
         public boolean apply(Object source, String name, Object value) {
               if(source.getClass() == type){
                  for(String pro : properties){
                     if(pro.equals(name)){
                        return false;
                     }
                  }
               }
               return true;
            }
       };
       return JSON.toJSONString(data, filter, features); 
   }
   
}