springmvc返回json参数封装

现在大部分项目都用springmvc返回json参数来作为接口，但是又很难统一返回值格式和个性化定制返回值 尤其是作为APP接口 接口返回的状态码尤为重要 所以本人对springmvc返回json参数和返回值进行了一个简单封装 减少了重复的代码

首先建立一个GeneralReturn.java类 集成了返回状态码 响应消息 是否成功 和初始化常见状态码消息

/** * Created by LaoWang on 2017/5/4. */public class GeneralReturn implements Serializable {    private static Map<String,String>messageMap = Maps.newHashMap();    private String message;    private boolean success = true;    private int code;    //初始化状态码与文字说明    static {        messageMap.put("0", "");        messageMap.put("400", "HTTP 错误 400.0 - 访问被拒绝：错误的请求");        messageMap.put("401", "HTTP 错误 401.1 - 未经授权：访问由于凭据无效被拒绝");        messageMap.put("405", "用来访问本页面的 HTTP 谓词不被允许（方法不被允许）");        messageMap.put("406", "客户端浏览器不接受所请求页面的 MIME 类型");        messageMap.put("500", "HTTP 错误 500.0 - 服务器出错：内部服务器出错");        messageMap.put("1005", "[服务器]运行时异常");        messageMap.put("1006", "[服务器]空值异常");        messageMap.put("1007", "[服务器]数据类型转换异常");        messageMap.put("1008", "[服务器]IO异常");        messageMap.put("1009", "[服务器]未知方法异常");        messageMap.put("1010", "[服务器]数组越界异常");        messageMap.put("1011", "[服务器]网络异常");    }    public GeneralReturn() {    }    public static GeneralReturn success() {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(true);        return generalReturn;    }    public static GeneralReturn success(String message) {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(true);        generalReturn.setMessage(message);        return generalReturn;    }    public static GeneralReturn success(String message,int code) {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(true);        generalReturn.setCode(code);        generalReturn.setMessage(message);        return generalReturn;    }    public static GeneralReturn error(int code) {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(true);        generalReturn.setCode(code);        generalReturn.setMessage(messageMap.get(String.valueOf(code)));        return generalReturn;    }    public static GeneralReturn fail(String message) {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(false);        generalReturn.setCode(-1);        generalReturn.setMessage(message);        return generalReturn;    }    public static GeneralReturn fail(String message, int code) {        GeneralReturn generalReturn = new GeneralReturn();        generalReturn.setSuccess(false);        generalReturn.setCode(code);        generalReturn.setMessage(message);        return generalReturn;    }    public GeneralReturn put(String key, Object value) {        this.data.put(key, value);        return this;    }    public GeneralReturn putAll(Map<String, ?> map) {        Iterator i$ = map.keySet().iterator();        while(i$.hasNext()) {            String key = (String)i$.next();            Object value = map.get(key);            if(value != null) {                this.put(key, value);            }        }        return this;    }    public boolean isEmpty() {        return this.data == null || this.data.isEmpty();    }    //省略get set 方法}

使用方法

    @ResponseBody    @RequestMapping(value = { "/workQueueTest.json" }, method = RequestMethod.POST)    public GeneralReturn workQueueDemo(@RequestParam Integer forNum,HttpServletRequest request)throws Exception{        logger.info("WorkQueue队列实现演示");        if(forNum>=20){            return Response.fail("普通演示不允许超过20!");        }        //这里只是为了说明在队列中的变量都要设置为私有的        final String key = "WorkQueue-Test";        long startTime=System.currentTimeMillis();   //获取开始时间        for(int i = 0; i<=forNum; i++){            workQueue.execute(new Runnable() {                @Override                public void run() {                    //具体队列需要执行的模块代码                    logger.info("执行队列-----"+key);                }            });        }        long endTime=System.currentTimeMillis(); //获取结束时间        return GeneralReturn.success((endTime-startTime)+" ms -队列执行时间");    }

其他返回值方法根据需要传参数即可