fastjson的SerializerFeature用法

package cn.focus.dc.jiajing.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.google.common.collect.ImmutableMap;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * JsonResponse class.
 * </p>
 *
 * @author xingtaoshi@gmail.com json工具类
 * @version $Id: $Id
 */
public final class JsonResponse {

    private JsonResponse() {
    }


    private static SerializerFeature[] features = {SerializerFeature.WriteNullNumberAsZero,SerializerFeature.WriteNullStringAsEmpty,SerializerFeature.DisableCircularReferenceDetect};

    /**
     * <p>
     * badResult.
     * </p>
     *
     * @param cause a {@link String} object.
     * @return a {@link String} object.
     */
    public static String badResult(String cause) {
        JSONObject result = new JSONObject();
        result.put("errorCode",1);
        result.put("errorMessage",cause);
//        return "@" + result.toJSONString();
        return "@" + JSON.toJSONString(result,features);
    }

    /**
     * <p>
     * emptyResult.
     * </p>
     *
     * @param cause a {@link String} object.
     * @return a {@link String} object.
     */
    public static String emptyResult(String cause) {
        JSONObject result = new JSONObject();
        result.put("errorCode",2);
        result.put("errorMessage",features);
    }

    /**
     * jsonp请求失败
     *
     * @param cause    a {@link String} object.
     * @param callback a {@link String} object.
     * @return a {@link String} object.
     */
    public static String badResult(String cause,String callback) {
        JSONObject result = new JSONObject();
        result.put("errorCode",cause);
//        return "@" + callback + "(" + result.toJSONString() + ")";
        return "@" + callback + "(" + JSON.toJSONString(result,features) + ")";
    }

    /**
     * <p>
     * badResult.
     * </p>
     *
     * @param cause a {@link java.util.Map} object.
     * @return a {@link String} object.
     */
    public static String badResult(Map<String,String> cause) {
        JSONObject result = new JSONObject();
        result.put("errorCode",features);
    }

    /**
     * 区分错误类型
     *
     * @param type  a int.
     * @param cause a {@link String} object.
     * @return a {@link String} object.
     */
    public static String badResult(int type,String cause) {
        JSONObject result = new JSONObject();
        result.put("errorCode",ImmutableMap.of("type",type,"msg",cause));
//        return "@" + result.toJSONString();
        return "@" + JSON.toJSONString(result,features);
    }

    /**
     * <p>
     * ok.
     * </p>
     *
     * @return a {@link String} object.
     */
    public static String ok() {
        JSONObject result = new JSONObject();
        result.put("errorCode",0);
        result.put("data","成功");
        return "@" + result.toString();
    }

    /**
     * <p>
     * okWithEmpty.
     * </p>
     *
     * @return a {@link String} object.
     */
    public static String okWithEmpty() {
        JSONObject result = new JSONObject();
        result.put("errorCode",Collections.emptyList());
        return "@" + result.toString();
    }

    /**
     * <p>
     * ok.
     * </p>
     *
     * @param key   a {@link String} object.
     * @param value a {@link Object} object.
     * @return a {@link String} object.
     */
    public static String ok(String key,Object value) {
        JSONObject result = new JSONObject();
        result.put("errorCode",ImmutableMap.of(key,value));
        return "@" + JSON.toJSONString(result,features);
//        return "@" + result.toJSONString();
    }

    /**
     * <p>
     * ok.
     * </p>
     *
     * @param object a {@link Object} object.
     * @return a {@link String} object.
     */
    public static String ok(Object object) {
        JSONObject result = new JSONObject();
        result.put("errorCode",object);
        return "@" + JSON.toJSONString(result,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 返回分页结果json字串
     *
     * @param object    数据对象
     * @param pageTotal 结果列表总共多少页
     * @param pageSize  每页多少条记录
     * @param pageNo    页号
     * @return json 字串
     */
    public static String okWithPaginate(Object object,int pageTotal,int pageSize,int pageNo) {
        JSONObject result = new JSONObject();
        result.put("pageTotal",pageTotal);
        result.put("pageSize",pageSize);
        result.put("pageNo",pageNo);
        result.put("data",object);
        result.put("errorCode",0);
        return "@" + JSON.toJSONString(result,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 返回分页结果json字串
     *
     * @param object    数据对象
     * @param pageTotal 结果列表总共多少页
     * @param pageSize  每页多少条记录
     * @param pageNo    页号
     * @param count     数据条数
     * @return json 字串
     */
    public static String okWithPaginate(Object object,int count) {
        JSONObject result = new JSONObject();
        result.put("data",object);
        result.put("count",count);
        result.put("errorCode",features);
//        return "@" + result.toJSONString();
    }

    /**
     * <p>
     * jsonp.
     * </p>
     *
     * @param object   a {@link Object} object.
     * @param callback a {@link String} object.
     * @return a {@link String} object.
     */
    public static String jsonp(Object object,object);
        return "@" + callback + "(" + JSON.toJSONString(result,features) + ")";
//        return "@" + callback + "(" + result.toJSONString() + ")";
    }

    /**
     * 可以通过map形式传递参数，但是如果是ok，msg这两个参数的值会被覆盖掉
     *
     * @param params a {@link java.util.Map} object.
     * @return a {@link String} object.
     */
    public static String ok(Map<String,Object> params) {
        JSONObject result = new JSONObject();
        result.put("errorCode",params);
        return "@" + JSON.toJSONString(result,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 可以通过map形式传递参数，但是如果是ok，msg这两个参数的值会被覆盖掉
     *
     * @param params a {@link com.google.common.collect.ImmutableMap} object.
     * @return a {@link String} object.
     */
    public static String ok(ImmutableMap<String,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 返回分页结果json字串
     *
     * @param list
     * @param pageTotal
     * @param pageSize
     * @param pageNo
     * @param <T>
     * @return json 字串
     */
    public static <T> String okWithPaginate(List<T> list,pageNo);
        result.put("errorCode",list);
        return "@" + JSON.toJSONString(result,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 返回分页结果的json
     *
     * @param params
     * @param pageTotal
     * @param pageSize
     * @param pageNo
     * @return json 字串
     */
    public static String okWithPaginate(Map<String,Object> params,features);
//        return "@" + result.toJSONString();
    }

    /**
     * 返回分页结果的json
     *
     * @param params
     * @param pageTotal
     * @param pageSize
     * @param pageNo
     * @return json 字串
     */
    public static String okWithPaginateDisableRef(Map<String,features);
//        return "@" + JSON.toJSONString(result,SerializerFeature.DisableCircularReferenceDetect);
    }

    /**
     * 返回分页结果json字串,去掉fastjson循环引用功能
     *
     * @param object    数据对象
     * @param pageTotal 结果列表总共多少页
     * @param pageSize  每页多少条记录
     * @param pageNo    页号
     * @param count     数据条数
     * @return json 字串
     */
    public static String okWithPaginateDisableRef(Object object,0);
        //消除fastjson对同一对象循环引用的问题
        return "@" + JSON.toJSONString(result,SerializerFeature.DisableCircularReferenceDetect);
    }

    /**
     * <p>
     * main.
     * </p>
     *
     * @param args an array of {@link String} objects.
     */
    public static void main(String[] args) {
        Map<String,Object> params = new HashMap<String,Object>();
        params.put("test",1);
        params.put("test1","ok");
    }

}

（编辑：李大同）

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