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 = "數據加載成功";

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

/**
* 生成json返回結果
*/
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返回結果
*/
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返回結果
*/
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返回結果
*/
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返回結果,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返回結果,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);
}

}

轉載于:https://www.cnblogs.com/jvhuaxia/p/11142412.html

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