实现登录，编写错误码，实现错误码返回json

src/main/java/com/fjy/spring/enums/ResultEnum.java

@@ -0,0 +1,28 @@
+package com.fjy.spring.enums;
+
+public enum ResultEnum {
+    UNKOWN_ERROR(-1,"未知错误"),
+    SUCCESS(0,"请求成功"),
+    USER_NOTEXIST(101,"用户不存在"),
+    UPDATE_ERROR(102,"更新失败"),
+    DELETE_ERROR(103,"删除失败"),
+    ADD_ERROR(104,"添加失败"),
+    WRONGPASS(105,"用户名或密码错误"),
+    ILLEGAL_ACCESS(106,"非法访问")
+    ;
+    private Integer code;
+    private String msg;
+
+    public Integer getCode() {
+        return code;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+
+    ResultEnum(Integer code, String msg) {
+        this.code = code;
+        this.msg = msg;
+    }
+}