1.定义一个枚举类，如下所示：
public enum ResultEnum {
SUCCESS(0,"成功"),
ERROR(1,"失败"),
FAIL(-1,"未知错误");
private int code;
private String msg;
ResultEnum(int code, String msg) {
this.code = code;
this.msg = msg;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
2.定义返回结果参数类，如下所示
public class ResponseParam<T> implements Serializable {
/**
* 返回数据
*/
private Map<String,T> data = new HashMap<>();
private int code;
private String msg;
public static ResponseParam SUCCESS(){
return new ResponseParam(ResultEnum.SUCCESS);
}
public static ResponseParam ERROR(){
return new ResponseParam(ResultEnum.ERROR);
}
public static ResponseParam FAIL(){
return new ResponseParam(ResultEnum.FAIL);
}
private ResponseParam() {
}
private ResponseParam(ResultEnum resultEnum) {
this.code = resultEnum.getCode();
this.msg = resultEnum.getMsg();
}
private ResponseParam(int code, String msg,Map<String, T> data) {
this.data = data;
this.code = code;
this.msg = msg;
}
public static ResponseParam build(int code, String msg,Map<String, Object> data){
return ResponseParam.ResponseParamBuilderHandler.build(code,msg,data);
}
public ResponseParam addData(String key, T t){
data.put(key,t);
return this;
}
/**
* 采用静态内部类实现单例模式创建对象
*/
private static class ResponseParamBuilderHandler{
private static ResponseParam<Object> responseParam = new ResponseParam<>();
public static ResponseParam build(int code,String msg,Map<String,Object> data){
responseParam.setCode(code);
responseParam.setMsg(msg);
responseParam.setData(data);
return responseParam;
}
}
public Map<String, T> getData() {
return data;
}
public void setData(Map<String, T> data) {
this.data = data;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
3.测试
@GetMapping("/pmc/sms/createTask")
public ResponseParam createTask(){
//smsCenterTaskSender.createTaskAndSender();
Map<String, Object> map = new HashMap<>();
map.put("1","1111");
map.put("23","234");
ResponseParam obj1 = ResponseParam.build(-2,"错误信息",map);
ResponseParam obj2 = ResponseParam.build(-3,"错误信息2",map);
if(obj1 == obj2){
System.out.println("同一个实例对象");
}
return ResponseParam.build(-2,"错误信息",map);
}
结果打印“同一个实例对象”