- 定义一个相对通用的JSON响应结构,其中包含两部分:元数据与返回值,其中,元数据表示操作是否成功与返回值消息等,返回值对应服务端方法所返回的数据。
public class Response { private static final String OK = "ok";
private static final String ERROR = "error"; private Meta meta;
private Object data; public Response success() {
this.meta = new Meta(true, OK);
return this;
} public Response success(Object data) {
this.meta = new Meta(true, OK);
this.data = data;
return this;
} public Response failure() {
this.meta = new Meta(false, ERROR);
return this;
} public Response failure(String message) {
this.meta = new Meta(false, message);
return this;
} public Meta getMeta() {
return meta;
} public Object getData() {
return data;
} public class Meta { private boolean success;
private String message; public Meta(boolean success) {
this.success = success;
} public Meta(boolean success, String message) {
this.success = success;
this.message = message;
} public boolean isSuccess() {
return success;
} public String getMessage() {
return message;
}
}
}
以上Response类包括两类通用返回值消息:ok与error,还包括两个常用的操作方法:success( )与failure( ),通过一个内部类来展现元数据结构,我们在下文中多次会使用该Response类。
- 该JSON响应结构如下:
{
"meta": {
"success": true,
"message": "ok"
},
"data": ...
}