SpringBoot之封装json对象返回json数据

/**
 * @description:封装json对象，所有返回结果都使用它
 **/
public class Result<T> {

    private int code;// 业务自定义状态码

    private String msg;// 请求状态描述，调试用

    private T data;// 请求数据，对象或数组均可

    public Result() {
    }

    /**
     * 成功时候的调用
     * @param data data
     * @param <T> t
     * @return Result
     */
    public static <T> Result<T> success(T data){
        return new Result<T>(data);
    }

    /**
     * 失败时候的调用
      * @param codeMsg codeMsg
     * @param <T> t
     * @return Result
     */
    public static <T> Result<T> error(CodeMsg codeMsg){
        return new Result<T>(codeMsg);
    }

    /**
     * 成功的构造函数
     * @param data data
     */
    public Result(T data){
        this.code = 200;//默认200是成功
        this.msg = "SUCCESS";
        this.data = data;
    }

    public Result(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    /**
     * 失败的构造函数
     * @param codeMsg codeMsg
     */
    private Result(CodeMsg codeMsg) {
        if(codeMsg != null) {
            this.code = codeMsg.getCode();
            this.msg = codeMsg.getMsg();
        }
    }

    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;
    }

    public T getData() {
        return data;
    }

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

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

public class CodeMsg {
    
    private int code;
    private String 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;
    }
    /*服务端异常*/
    public static CodeMsg SUCCESS = new CodeMsg(200,"SUCCESS");
    public static CodeMsg SERVER_ERROR = new CodeMsg(100,"系统异常：%s");
    public static CodeMsg BIND_ERROR = new CodeMsg(101,"(绑定异常)参数校验异常：%s"); /*用占位符 传入一个参数*/
    public static CodeMsg SESSION_ERROR = new CodeMsg(102,"没有SESSION！"); /*用占位符 传入一个参数*/
    public static CodeMsg REQUEST_ERROR = new CodeMsg(103,"非法请求！"); /*用占位符 传入一个参数*/
    public static CodeMsg REQUEST_OVER_LIMIT = new CodeMsg(104,"请求次数过多！"); /*用占位符 传入一个参数*/

    private CodeMsg( ) {
    }
    private CodeMsg( int code,String msg ) {
        this.code = code;
        this.msg = msg;
    }
    //不定参的构造函数
    public CodeMsg fillArgs(Object... args) {
        int code = this.code;
        String message = String.format(this.msg, args);
        return new CodeMsg(code, message);
    }
    @Override
    public String toString() {
        return "CodeMsg [code=" + code + ", msg=" + msg + "]";
    }
}