/**
* @author StormMa
* @Date 2017-03-21
*/

生命不息，奋斗不止！

之所以讲究规范会请求处理，就是将每次的后端处理结果封装成固定的格式去回送到前端，之于规范化的好处，就不甚枚举了。我们先看看代码实现吧！

定义结果集的规范

/**
 * <p>Created on 2017/3/15.</p>
 *
 * @author StormMa
 *
 * @Description: 对请求结果进行封装
 */
public class RequestResult<T> {

    /**
     * error code :错误是1、成功是0
     */
    private Integer code;

    /**
     * 要返回的数据
     */
    private T data;

    /**
     * 本次请求的说明信息
     */
    private String msg;

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    @Override
    public String toString() {
        return "RequestResult{" +
                "code=" + code +
                ", data=" + data +
                ", msg='" + msg + '\'' +
                '}';
    }
}

结果集封装

/**
 * <p>Created on 2017/3/15.</p>
 *
 * @author StormMa
 *
 * @Description: 封装请求结果的工具类
 */
public class ResultUtil {

    /**
     * 成功请求的结果封装
     * @param t
     * @param <T>
     * @return
     */
    public static <T> RequestResult<T> success(T t) {
        RequestResult<T> result = new RequestResult<>();
        result.setCode(0);
        result.setMsg("success");
        result.setData(t);
        return result;
    }

    /**
     * 成功请求的结果封装
     * @param <T>
     * @return
     */
    public static <T> RequestResult<T> success() {
        return success(null);
    }

    /**
     * 失败请求的结果封装
     * @param <T>
     * @return
     */
    public static <T> RequestResult<T> fail() {
        RequestResult<T> result = new RequestResult<>();
        result.setCode(1);
        result.setData(null);
        result.setMsg("fail");
        return result;
    }

    /**
     * 失败请求的结果封装
     * @param msg
     * @param <T>
     * @return
     */
    public static <T> RequestResult<T> fail(String msg) {
        RequestResult<T> result = new RequestResult<>();
        result.setCode(1);
        result.setData(null);
        result.setMsg(msg);
        return result;
    }
}

举例

/**
 * <p>Created on 2017/3/21.</p>
 * 
 * @author StormMa
 * 
 * @Description: 使用规范化结果响应
 */
@RestController
@RequestMapping(value = "/test")
public class TestController {
    
    @Autowired
    private ITestService testService;
    
    @RequestMapping(value = "/{testId}")
    public RequestResult<Test> getTest(@PathVariable int testId) {
        Test test = testService.getTestById(testId);
        
        if (test != null) {
            return ResultUtil.success(test);
        }
        return ResultUtil.fail("不存在数据！");
    }
}

结束语

看到规范化请求响应的好处了吧，Controller里面的代码更加简洁明了！