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);  }

}