抛出异常时将异常信息返给前端
全局异常处理器负责将抛出的异常,以统一的格式返给前端。在这里起主要作用的注解是@RestControllerAdvice。
@RestControllerAdvice主要配合@ExceptionHandler使用,统一处理异常情况。
1、@RestControllerAdvice 注解,可以用于定义@ExceptionHandler、@InitBinder、@ModelAttribute,并应用到所有@RequestMapping中。
2、@RestControllerAdvice 是组件注解,他使得其实现类能够被classpath扫描自动发现,如果应用是通过MVC命令空间或MVC Java编程方式配置,那么该特性默认是自动开启的。
例如:
当抛出BizException时,会自动返回ReturnResult.error(...)。这样,在真正的业务中,我们只需要返回ReturnResult.success(...)就可以了。
目录结构:
具体代码:
import com.sugon.cloud.lowcode.result.ReturnResult;
import lombok.extern.slf4j.Slf4j;
import org.mybatis.spring.MyBatisSystemException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import javax.naming.AuthenticationException;
import javax.servlet.http.HttpServletRequest;
import static com.sugon.cloud.lowcode.constants.SplitCharacter.LEFT_PARENTHESES;
import static com.sugon.cloud.lowcode.constants.SplitCharacter.RIGHT_PARENTHESES;
import static com.sugon.cloud.lowcode.result.CodeMessageEnum.*;
/**
* 全局异常
*/
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {
/**
* 业务异常类
*
*/
@ExceptionHandler(value = BizException.class)
@ResponseBody
public ReturnResult bizExceptionHandler(HttpServletRequest req, BizException e) {
log.error("发生业务异常: {}, 请求接口: {}", e.getMessage(), req.getRequestURI());
return ReturnResult.error(e.getCode(), e.getMessage());
}
/**
* 空指针异常
*
* @param e 异常信息
* @param req 请求
*/
@ExceptionHandler(value = NullPointerException.class)
@ResponseBody
public ReturnResult exceptionHandler(HttpServletRequest req, NullPointerException e) {
log.error("空指针异常信息: {}, 请求接口: {}", e, req.getRequestURI());
return ReturnResult.error(
NULL_POINT_ERROR_EXCEPTION.getCode(),
NULL_POINT_ERROR_EXCEPTION.getMessage()
+ RIGHT_PARENTHESES
+ e.getMessage()
+ LEFT_PARENTHESES);
}
/**
* 接口请求方法异常
*
*/
@ExceptionHandler(value = HttpRequestMethodNotSupportedException.class)
@ResponseBody
public ReturnResult methodNotSupportedExceptionHandler(HttpServletRequest req, Exception e) {
log.error("请求方法异常信息: {},请求接口: {}", e, req.getRequestURI());
return ReturnResult.error(
REQUEST_METHOD_ERROR.getCode(),
REQUEST_METHOD_ERROR.getMessage() + RIGHT_PARENTHESES + e.getMessage() + LEFT_PARENTHESES);
}
/**
* SQL 语法错误异常
*
*/
@ExceptionHandler(value = MyBatisSystemException.class)
@ResponseBody
public ReturnResult sqlSyntaxErrorExceptionHandler(HttpServletRequest req, Exception e) {
log.error("MyBatis系统异常信息: {},请求接口: {}", e, req.getRequestURI());
return ReturnResult.error(
INNER_FRAME_EXCEPTION.getCode(),
INNER_FRAME_EXCEPTION.getMessage() + RIGHT_PARENTHESES + e.getMessage() + LEFT_PARENTHESES);
}
@ExceptionHandler(value = AuthenticationException.class)
public ReturnResult incorrectCredentialsException(
HttpServletRequest request, AuthenticationException e) {
log.error("用户名或密码不正确: {}, 请求接口: {}", e, request.getRequestURI());
return ReturnResult.error(USER_CREDENTIALS_ERROR);
}
@ExceptionHandler(value = UserException.class)
public ReturnResult incorrectUserException(HttpServletRequest request, UserException e) {
log.error("用户信息异常: {}, 请求接口: {}", e, request.getRequestURI());
return ReturnResult.error(e.getCode(), e.getMessage());
}
/**
* 其他异常信息
*
* @param req
* @param e
*/
@ExceptionHandler(value = Exception.class)
@ResponseBody
public ReturnResult exceptionHandler(HttpServletRequest req, Exception e) {
e.printStackTrace();
log.error("未知异常: {}, 请求接口: {}", e, req.getRequestURI());
return ReturnResult.error(
INTERNAL_SERVER_ERROR.getCode(),
INTERNAL_SERVER_ERROR.getMessage() + RIGHT_PARENTHESES + e.getMessage() + LEFT_PARENTHESES);
}
}
自定义的业务异常类:
import com.sugon.cloud.lowcode.result.BaseResultInterface;
import com.sugon.cloud.lowcode.result.CodeMessageEnum;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
/**
* @desc 业务异常类
*/
@ApiModel(description= "业务异常数据")
public class BizException extends RuntimeException implements BaseResultInterface {
private static final long serialVersionUID = 1L;
/**
* 错误码
*/
@ApiModelProperty(value = "错误码")
private String code;
/**
* 错误信息
*/
@ApiModelProperty(value = "错误信息")
private String message;
public BizException() {
super();
}
public BizException(CodeMessageEnum codeMessageEnum) {
super(codeMessageEnum.getCode());
this.code = codeMessageEnum.getCode();
this.message = codeMessageEnum.getMessage();
}
public BizException(CodeMessageEnum codeMessageEnum, Throwable cause) {
super(codeMessageEnum.getCode(), cause);
this.code = codeMessageEnum.getCode();
this.message = codeMessageEnum.getMessage();
}
public BizException(CodeMessageEnum codeMessageEnum, String message, Throwable cause) {
super(codeMessageEnum.getCode(), cause);
this.code = codeMessageEnum.getCode();
this.message = message;
}
public BizException(String message) {
super(message);
this.message = message;
}
public BizException(String code, String message) {
super(code);
this.code = code;
this.message = message;
}
public BizException(String code, String message, Throwable cause) {
super(code, cause);
this.code = code;
this.message = message;
}
@Override
public Throwable fillInStackTrace() {
return this;
}
@Override
public String getCode() {
return this.code;
}
@Override
public String getMessage() {
return this.message;
}
}
对象返回到前端以及异常抛出的接口类:
/**
* @desc 对象返回到前端以及异常抛出的接口类
*/
public interface BaseResultInterface {
/**
* 获取返回代码值
*
* @author zby
* @datetime 2022/11/29 15:23
*/
String getCode();
/**
* 获取返回信息
*
* @author zby
* @datetime 2022/11/29 10:26
*/
String getMessage();
}
异常枚举类:
package com.sugon.cloud.lowcode.result;
import com.sugon.cloud.lowcode.entity.vo.CodeVo;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiModel;
import static org.apache.commons.lang3.StringUtils.isBlank;
/**
* @desc 定义错误码编码的枚举类
*/
@ApiModel(description = "code码类")
@Api(tags = "code码管理")
public enum CodeMessageEnum implements BaseResultInterface {
/** ********* 0000成功 *************** */
SUCCESS("0000", "成功!"),
SUCCESS_LOGIN("0001", "用户登录成功"),
SUCCESS_LOGOUT("0002", "用户退出成功"),
/* 默认失败 */
COMMON_FAIL("999", "失败"),
/** ********* 1xxx系统错误 *************** */
SERVER_BUSY("1001", "服务器正忙,请稍后再试!"),
INTERNAL_SERVER_ERROR("1002", "服务器内部错误"),
NOT_FOUND("1003", "未找到该资源!"),
REQUEST_METHOD_ERROR("1004", "接口请求方法异常"),
SQL_SYNTAX_ERROR_EXCEPTION("1005", "SQL语法错误异常"),
NULL_POINT_ERROR_EXCEPTION("1006", "空指针异常信息"),
INNER_FRAME_EXCEPTION("1007", "内部框架执行异常"),
PARSE_TOKEN_EXCEPTION("1008", "解析token异常"),
TOKEN_NOT_EXIST("1009", "token不存在"),
TOKEN_SIGNATURE_EXCEPTION("1010", "token签名异常"),
TOKEN_EXPIRE("1011", "token过期,请重新登录"),
IMG_TYPE_NOT_CONFIG("1012", "请配置图片类型"),
NOT_CONFIG_FILE_DIR("1013", "请配置文件路径"),
UPLOAD_FILE_ERROR("1014", "文件上传失败"),
FILE_NOT_EXIST("1015", "文件不存在"),
FILE_HAS_DELETED("1016", "文件已被删除"),
DRIVER_CLASS_NOT_FOUND("1017", "数据库的连接驱动正在加载中..."),
TRY_CONNECT_DATABASE_ERROR("1018", "尝试连接数据库失败"),
CLOSE_CONNECT_DATABASE_ERROR("1019", "关闭数据库连接失败"),
DATABASE_NAME_NOT_EXIST("1020", "数据库名称不存在"),
CLOSE_DATASOURCE_ERROR("1021", "释放数据库资源异常"),
DRUID_DATASOURCE_ERROR("1022", "数据源创建中..."),
CREATE_DATABASE_ERROR("1023", "创建数据库失败"),
CREATE_TABLE_ERROR("1024", "创建表失败"),
UPDATE_TABLE_FIELD_ERROR("1025", "更新表字段失败"),
DELETE_TABLE_FIELD_ERROR("1026", "删除表字段失败"),
QUERY_ROLE_ERROR("1027", "查询角色失败"),
UPDATE_GROUP_ERROR("1028", "更新接口组失败"),
DELETE_GROUP_ERROR("1029", "删除接口组失败"),
SAVE_INTERFACE_ERROR("1030", "保存接口信息失败"),
/**
* ******2xxx参数错误 *********************
*/
BODY_NOT_MATCH("2001", "请求的数据格式不符"),
SIGNATURE_NOT_MATCH("2002", "请求的数字签名不匹配!"),
REQUEST_PATH_NOT_MATCH("2003", "当前请求路径没有权限!"),
NOT_UPLOAD_FILE_NAME_ERROR("2004", "上传的文件名不存在,请重新上传"),
NOT_SUPPORT_IMG_TYPE("2005", "图片格式不正确,请重新上传"),
NOT_SUPPORT_USERNAME_TYPE("2006", "excel用户名不能为空"),
NOT_SUPPORT_ROLE_TYPE("2007", "角色不存在"),
NOT_SUPPORT_DEPT_TYPE("2008", "部门不存在"),
SQL_INJECT_NOT_ALLOWED("2009", "参数中存在数据库关键字,请修改"),
TABLE_FIELD_NOT_EXIST("2010", "表字段不存在"),
/** *********** 3xxx用户错误 ******************* */
USER_NOT_LOGIN("3001", "用户未登录"),
USER_ACCOUNT_EXPIRED("3002", "账号已过期"),
USER_CREDENTIALS_ERROR("3003", "用户名或密码错误"),
USER_CREDENTIALS_EXPIRED("3004", "密码过期"),
USER_ACCOUNT_NOT_BIND_ENTERPRISE("3005", "当前账号未绑定企业"),
USER_ACCOUNT_LOCKED("3006", "账号被锁定"),
USER_ACCOUNT_NOT_EXIST("3007", "账号不存在"),
USER_ACCOUNT_ALREADY_EXIST("3008", "账号已存在"),
USER_ACCOUNT_USE_BY_OTHERS("3009", "账号下线"),
USER_NO_PERMISSION("3010", "当前账号没有此权限"),
USERNAME_NOT_BLANK("3011", "用户不能为空"),
USER_LOGIN_ERROR("3012", "用户登录失败"),
USER_LOGOUT_ERROR("3013", "用户退出失败"),
USER_ACCOUNT_USE_BY_OTHERS_ERROR("3014", "账号下线异常"),
USER_ACCESS_DENIED("3015", "权限认证失败"),
USERNAME_EXIST_ERROR("3016", "用户名重名"),
ROLE_NAME_ALREADY_EXIST("3101", "角色已存在"),
/** ********** 4xxx业务错误 *********************** */
ENTERPRISE_NOT_EXIST("4001", "当前企业不存在"),
APP_KEY_EXIST("4002", "应用key已存在"),
APP_NOT_EXIST("4003", "应用不存在"),
APP_PAGE_NAME_EXIST("4004", "当前页面名称已存在"),
APP_PAGE_KEY_EXIST("4005", "当前页面key已存在"),
APP_PAGE_NOT_EXIST("4006", "当前页面不存在,或已删除"),
APP_PAGE_TYPE_ERROR("4007", "页面类型有误"),
APP_PAGE_HOME_IS_NOT_EXIST("4008", "请设置首页"),
CAN_NOT_DELETE_HOME_PAGE("4009", "请勿删除首页"),
DELETE_PAGE_ERROR("4010", "删除页面失败"),
CONFIG_CUSTOM_ERROR("4011", "配置自定义页面失败"),
APP_PAGE_PARENT_NOT_EXIST("4012", "当前页面的父级页面不存在,或已删除"),
DATASOURCE_NAME_EXIST("4013", "当前数据源名称已经存在,请修改后重试"),
DATASOURCE_NOT_EXIST("4014", "当前数据源不存在"),
DATASOURCE_HAS_DELETED("4015", "当前数据源已删除"),
MODEL_NOT_EXIST("4016", "当前模型不存在"),
MODEL_HAS_DELETED("4017", "当前模型已删除"),
MODEL_NAME_HAS_EXIST("4018", "当前模型名称已存在"),
DATASOURCE_NOT_CONFIG("4019", "数据源配置为空,请联系管理员"),
DATASOURCE_NOT_CONFIG_DIALECT("4020", "未配置数据源的类型"),
DATASOURCE_NOT_CONFIG_DRIVER_CLASS_NAME("4021", "未配置数据源的驱动"),
DEPT_USER_EXIST("4022", "部门下存在用户"),
NOT_CONFIG_PAGE_BUTTON_TYPE("4023", "未配置按钮雷星"),
MODEL_PAGE_RELATION_MODEL("4024", "已关联当前模型页面"),
MODEL_PAGE_NOT_EXIST("4025", "模型页面不存在或已被删除"),
MODEL_HAS_RELATION_MODEL_PAGE("4026", "当前模型已关联模型页面,不允许删除"),
FORM_NOT_EXIST("4027", "模型表单不存在"),
READ_FILE_ERROR("4028", "读取模型页面的模板文件失败"),
MODEL_PAGE_CONTENT_NULL("4029", "未配置模型页面的模板文件"),
NOT_CONFIG_QUERY_SQL("4030", "未配置查询语句"),
APP_PAGE_BUTTON_OPTION_VALUE_ERROR("4031", "未配置接口"),
DELETE_COLUMN_ERROR("4032", "删除当前失败"),
INSERT_DATA_ERROR("4033", "新建数据失败"),
EDIT_DATA_ERROR("4034", "编辑数据失败"),
DATASOURCE_HAS_MODELS("4035", "当前数据源存在模型,不允许删除"),
NOT_CONFIG_FORM_API("4036", "未配置模型表单页的接口信息"),
PLEASE_WRITE_AT_LEAST_DATA("4037", "请至少填写一行数据"),
AMIS_PAGE_ERROR("4038", "分页参数异常"),
QUERY_APP_PAGE_QUERY_FIELD_ERROR("4039", "查询搜素参数异常"),
REQUEST_PARAM_NOT_IN_APP_PAGE_QUERY_FIELD("4040", "请求参数不在查询数据表中"),
STYLE_LANGUAGE_ON_CSS("4041", "自定义css中的样式语言不能为空"),
APP_CONFIG_TYPE_NOT_EXIST("4042", "不支持当前应用设置的类型"),
APP_CONFIG_NOT_EXIST_OR_DELETED("4043", "当前设置不存在或已被删除"),
APP_HAS_CONFIG_ON_THIS_TYPE("4044", "当前应用设置的类型已存在,请更新"),
NOT_SUPPORT_COMPONENT_FRAME("4045", "不支持当前组件框架"),
NOT_SUPPORT_COMPONENT_TYPE("4046", "不支持当前组件类型"),
CURRENT_APP_KEY_EXIST("4047", "当前应用的组件key已存在"),
CREATE_CUSTOM_COMPONENT_ERROR("4048", "新增自定义组件失败"),
APP_CUSTOM_COMPONENT_NOT_EXIST("4049", "当前组件不存在或已被删除"),
UPDATE_CUSTOM_COMPONENT_ERROR("4050", "更新自定义组件失败"),
DELETED_CUSTOM_COMPONENT_ERROR("4051", "删除自定义组件失败"),
INSERT_COMPONENT_DEPENDENCE_ERROR("4052", "新增自定义组件依赖项失败"),
DELETE_COMPONENT_DEPENDENCE_ERROR("4053", "删除自定义组件依赖项失败"),
CURRENT_COMPONENT_DEPENDENCE_NOT_EXIST("4054", "当前自定义组件依赖项不存在或已被删除"),
CURRENT_APP_NAME_EXIST("4055", "当前应用的组件名称已存在"),
NOT_SUPPORT_DATASOURCE_FROM("4056", "不支持当前的数据库来源"),
JDBC_CONFIG_ERROR("4057", "平台内置的数据源配置有误"),
NOT_SUPPORT_MODEL_TYPE("4058", "不支持当前的页面模板"),
NOT_SUPPORT_CUSTOM_PAGE("4059", "暂不支持自定义页面"),
FORM_PAGE_ON_DEVELOPING("4060", "自定义页面的该功能正在开发中..."),
APP_PAGE_QUERY_FIELD_NOT_EXIST("4061", "当前查询条件不存在,或已被删除"),
APP_PAGE_BUTTON_NOT_EXIST("4062", "当前页面按钮不存在,或已被删除"),
TABLE_KEY_MORE_THEN_ONE("4063", "主键超过一个"),
TABLE_KEY_LESS_THEN_ONE("4064", "主键必须存在"),
TABLE_KEY_MUST_BE_INT("4065", "主键必须为整数类型"),
TABLE_FIELD_MUST_EXIST("4066", "必须存在表字段"),
CURRENT_MODEL_PAGE_HAS_CONVERSION_CUSTOM_PAGE("4067", "当前模型页面已转成自定义页面"),
NOT_SUPPORT_RELEASE_STATUS("4068", "发布版本状态有误"),
APP_FORM_BUTTON_NOT_EXIST("4067", "当前表单按钮不存在,或已被删除"),
DATASOURCE_KEY_EXIST_ERROR("4068","数据源key已存在")
;
CodeMessageEnum(String code, String message) {
this.code = code;
this.message = message;
}
/** 返回到前端的code值 */
private String code;
/** 返回到前端的code对应的message值 */
private String message;
@Override
public String getCode() {
return this.code;
}
@Override
public String getMessage() {
return this.message;
}
public static CodeVo getJsonObjectByCode(String code) {
CodeVo codeVo = new CodeVo();
if (isBlank(code)) {
return codeVo;
}
for (CodeMessageEnum enumObj : CodeMessageEnum.values()) {
if (enumObj.getCode().equals(code)) {
return new CodeVo(code, enumObj.message);
}
}
return codeVo;
}
}
统一给前端的结果格式:
import com.alibaba.fastjson.JSONObject;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;
import static com.sugon.cloud.lowcode.result.CodeMessageEnum.*;
/**
* @author zby
* @datetime 2022/12/2 10:23
* @desc 返回给前端的对象值
*/
@Setter
@Getter
@ApiModel(description= "返回响应数据")
public class ReturnResult<T> {
/** 响应代码 */
@ApiModelProperty(value = "状态码")
private String code;
/** 响应消息 */
@ApiModelProperty(value = "响应信息")
private String message;
/** 响应结果 */
@ApiModelProperty(value = "响应对象")
private T result;
/** 返回成功还是失败 */
@ApiModelProperty(value = "是否成功")
private boolean success = true;
public ReturnResult() {}
public ReturnResult(CodeMessageEnum codeMessageEnum) {
this.code = codeMessageEnum.getCode();
this.message = codeMessageEnum.getMessage();
}
/**
* 返回成功
*
* @author zby
* @datetime 2022/12/2 10:29
*/
public static ReturnResult success() {
return success(null);
}
/**
* 返回成功
*
* @param data 返回到前端的对象
* @author zby
* @datetime 2022/12/2 13:33
*/
public static <T> ReturnResult<T> success(T data) {
return success(SUCCESS, data);
}
/**
* 登录成功
*
* @param data 返回到前端的对象
* @author zby
* @datetime 2022/12/2 13:50
*/
public static <T> ReturnResult<T> loginSuccess(T data) {
return success(SUCCESS_LOGIN, data);
}
/**
* 退出成功
*
* @author zby
* @datetime 2022/11/30 14:53
*/
public static ReturnResult loginOutSuccess() {
return success(SUCCESS_LOGOUT, null);
}
private static <T> ReturnResult<T> success(CodeMessageEnum codeMessageEnum, T data) {
ReturnResult<T> result = new ReturnResult<>();
result.setCode(codeMessageEnum.getCode());
result.setMessage(codeMessageEnum.getMessage());
result.setResult(data);
return result;
}
/**
* 返回失败
*
* @param codeMessageEnum 基础返回接口
* @author zby
* @datetime 2022/12/2 14:50
*/
public static ReturnResult error(CodeMessageEnum codeMessageEnum) {
return error(codeMessageEnum.getCode(), codeMessageEnum.getMessage());
}
/**
* 返回失败
*
* @param codeMessageEnum
* @param message
* @author zby
* @datetime 2022/11/30 14:50
*/
public static ReturnResult error(CodeMessageEnum codeMessageEnum, String message) {
return error(codeMessageEnum.getCode(), message);
}
/**
* 返回失败
*
* @param code
* @param message
* @author zby
* @datetime 2022/11/28 16:23
*/
public static ReturnResult error(String code, String message) {
ReturnResult result = new ReturnResult();
result.setCode(code);
result.setMessage(message);
result.setSuccess(false);
return result;
}
/**
* 重写toString方法
*
* @author zby
* @datetime 2022/11/29 13:44
*/
@Override
public String toString() {
return JSONObject.toJSONString(this);
}
}