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Usually in the development process , Inevitably, we need to deal with all kinds of exceptions , So here we customize the unified exception in the public module ,Spring Boot Provide @RestControllerAdvice Annotation unified exception handling , We are GitEgg_Platform New China gitegg-platform-boot Sub project , This project is mainly used for Spring Boot Customization and extension of related functions .
1、 modify gitegg-platform-boot Of pom.xml, add to spring-boot-starter-web and swagger rely on , Set up optional by true, Let this package not pass dependencies between projects .
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-web</artifactid>
<optional>true</optional>
</dependency>
<dependency>
<groupid>com.gitegg.platform</groupid>
<artifactid>gitegg-platform-swagger</artifactid>
<optional>true</optional>
</dependency>
2、 Custom generic response message class ,Result and PageResult, One is a normal response message , One is the paging response message .
Result class ：
package com.gitegg.platform.boot.common.base;
import com.gitegg.platform.boot.common.enums.ResultCodeEnum;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.*;
/**
* @ClassName: Result
* @Description: Custom generic response class
* @author GitEgg
* @date 2020 year 09 month 19 Japan Afternoon 9:24:50
*/
@ApiModel(description = " General response class ")
@Getter
@ToString
public class Result<t> {
@ApiModelProperty(value = " The success of ", required = true)
private boolean success;
@ApiModelProperty(value =" Response code ", required = true)
private int code;
@ApiModelProperty(value =" Prompt information ", required = true)
private String msg;
@ApiModelProperty(value =" The response data ")
private T data;
/**
*
* @param code
* @param data
* @param msg
*/
private Result(int code, T data, String msg) {
this.success = ResultCodeEnum.SUCCESS.code == code;
this.code = code;
this.msg = msg;
this.data = data;
}
/**
*
* @param resultCodeEnum
*/
private Result(ResultCodeEnum resultCodeEnum ) {
this(resultCodeEnum.code, null, resultCodeEnum.msg);
}
/**
*
* @param resultCodeEnum
* @param msg
*/
private Result(ResultCodeEnum resultCodeEnum , String msg) {
this(resultCodeEnum, null, msg);
}
/**
*
* @param resultCodeEnum
* @param data
*/
private Result(ResultCodeEnum resultCodeEnum , T data) {
this(resultCodeEnum, data, resultCodeEnum.msg);
}
/**
*
* @param resultCodeEnum
* @param data
* @param msg
*/
private Result(ResultCodeEnum resultCodeEnum , T data, String msg) {
this(resultCodeEnum.code, data, msg);
}
/**
*
*
* @param data data
* @param <t> T The response data
* @
*/
public static <t> Result<t> data(T data) {
return data(data, ResultCodeEnum.SUCCESS.msg);
}
/**
*
*
* @param data data
* @param msg news
* @param <t> T The response data
* @
*/
public static <t> Result<t> data(T data, String msg) {
return data(ResultCodeEnum.SUCCESS.code, data, msg);
}
/**
*
*
* @param code Status code
* @param data data
* @param msg news
* @param <t> T The response data
* @
*/
public static <t> Result<t> data(int code, T data, String msg) {
return new Result<>(code, data, msg);
}
/**
* return Result
*
* @param
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> success() {
return new Result<>(ResultCodeEnum.SUCCESS);
}
/**
* return Result
*
* @param msg news
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> success(String msg) {
return new Result<>(ResultCodeEnum.SUCCESS, msg);
}
/**
* return Result
*
* @param
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> success(ResultCodeEnum resultCodeEnum ) {
return new Result<>(resultCodeEnum);
}
/**
* return Result
*
* @param
* @param msg Prompt information
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> success(ResultCodeEnum resultCodeEnum , String msg) {
return new Result<>(resultCodeEnum, msg);
}
/**
* return Result
*
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> error() {
return new Result<>(ResultCodeEnum.ERROR, ResultCodeEnum.ERROR.msg);
}
/**
* return Result
*
* @param msg news
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> error(String msg) {
return new Result<>(ResultCodeEnum.ERROR, msg);
}
/**
* return Result
*
* @param code Status code
* @param msg news
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> error(int code, String msg) {
return new Result<>(code, null, msg);
}
/**
* return Result
*
* @param
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> error(ResultCodeEnum resultCodeEnum ) {
return new Result<>(resultCodeEnum);
}
/**
* return Result
*
* @param
* @param msg Prompt information
* @param <t> T The response data
* @ return Result
*/
public static <t> Result<t> error(ResultCodeEnum resultCodeEnum , String msg) {
return new Result<>(resultCodeEnum, msg);
}
/**
*
* @param <t>
* @param flag
* @return
*/
public static <t> Result<t> result(boolean flag) {
return flag ? Result.success(" Successful operation ") : Result.error(" operation failed ");
}
}
PageResult class ：
package com.gitegg.platform.boot.common.base;
import java.util.List;
import com.gitegg.platform.boot.common.enums.ResultCodeEnum;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* @ClassName: PageResult
* @Description: General paging returns
* @author GitEgg
* @date
* @param <t>
*/
@Data
@ApiModel(" General paging response class ")
public class PageResult<t> {
@ApiModelProperty(value = " The success of ", required = true)
private boolean success;
@ApiModelProperty(value =" Response code ", required = true)
private int code;
@ApiModelProperty(value =" Prompt information ", required = true)
private String msg;
@ApiModelProperty(value =" Total quantity ", required = true)
private long count;
@ApiModelProperty(value =" Paging data ")
private List<t> data;
public PageResult(long total, List<t> rows) {
this.count = total;
this.data = rows;
this.code = ResultCodeEnum.SUCCESS.code;
this.msg = ResultCodeEnum.SUCCESS.msg;
}
}
3、 Custom generic response message enumeration class ResultCodeEnum.
package com.gitegg.platform.boot.common.enums;
/**
* @ClassName: ResultCodeEnum
* @Description: Custom return code enumeration
* @author GitEgg
* @date 2020 year 09 month 19 Japan Afternoon 11:49:45
*/
public enum ResultCodeEnum {
/**
* success
*/
SUCCESS(200, " Successful operation "),
/**
* System error
*/
ERROR(500, " System error "),
/**
* operation failed
*/
FAILED(101, " operation failed "),
/**
* Not logged in / login timeout
*/
UNAUTHORIZED(102, " login timeout "),
/**
* Parameter error
*/
PARAM_ERROR(103, " Parameter error "),
/**
* Parameter error - Already exists
*/
INVALID_PARAM_EXIST(104, " Request parameter already exists "),
/**
* Parameter error
*/
INVALID_PARAM_EMPTY(105, " The request parameter is empty "),
/**
* Parameter error
*/
PARAM_TYPE_MISMATCH(106, " Parameter type mismatch "),
/**
* Parameter error
*/
PARAM_VALID_ERROR(107, " Parameter verification failed "),
/**
* Parameter error
*/
ILLEGAL_REQUEST(108, " Illegal request "),
/**
* Verification code error
*/
INVALID_VCODE(204, " Verification code error "),
/**
* Wrong user name or password
*/
INVALID_USERNAME_PASSWORD(205, " Wrong account or password "),
/**
*
*/
INVALID_RE_PASSWORD(206, " The two passwords are not the same "),
/**
* Wrong user name or password
*/
INVALID_OLD_PASSWORD(207, " The old password is wrong "),
/**
* repeat of user name
*/
USERNAME_ALREADY_IN(208, " User name already exists "),
/**
* The user doesn't exist
*/
INVALID_USERNAME(209, " The username does not exist "),
/**
* The character doesn't exist
*/
INVALID_ROLE(210, " The character doesn't exist "),
/**
* The character doesn't exist
*/
ROLE_USED(211, " Role in use , Not delete "),
/**
* No authority
*/
NO_PERMISSION(403, " The current user does not have permission for this interface ");
public int code;
public String msg;
ResultCodeEnum(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;
}
}
4、 Custom exception classes BusinessException and SystemException
package com.gitegg.platform.boot.common.exception;
import com.gitegg.platform.boot.common.enums.ResultCodeEnum;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.Getter;
import lombok.Setter;
/**
* @ClassName: BusinessException
* @Description: Business processing exception
* @author GitEgg
* @date
*/
@Getter
@Setter
public class BusinessException extends RuntimeException {
private int code;
private String msg;
public BusinessException() {
this.code = ResultCodeEnum.FAILED.code;
this.msg = ResultCodeEnum.FAILED.msg;
}
public BusinessException(String message) {
this.code = ResultCodeEnum.FAILED.code;
this.msg = message;
}
public BusinessException(int code, String msg) {
this.code = code;
this.msg = msg;
}
public BusinessException(Throwable cause) {
super(cause);
}
public BusinessException(String message, Throwable cause) {
super(message, cause);
}
}
package com.gitegg.platform.boot.common.exception;
import com.gitegg.platform.boot.common.enums.ResultCodeEnum;
import lombok.Getter;
/**
* @ClassName: SystemException
* @Description: System handling exception
* @author GitEgg
* @date
*/
@Getter
public class SystemException extends RuntimeException {
private int code;
private String msg;
public SystemException() {
this.code = ResultCodeEnum.ERROR.code;
this.msg = ResultCodeEnum.ERROR.msg;
}
public SystemException(String message) {
this.code = ResultCodeEnum.ERROR.code;
this.msg = message;
}
public SystemException(int code, String msg) {
this.code = code;
this.msg = msg;
}
public SystemException(Throwable cause) {
super(cause);
}
public SystemException(String message, Throwable cause) {
super(message, cause);
}
}
5、 Custom unified exception handling class GitEggControllerAdvice.java
package com.gitegg.platform.boot.common.advice;
import com.gitegg.platform.boot.common.base.Result;
import com.gitegg.platform.boot.common.enums.ResultCodeEnum;
import com.gitegg.platform.boot.common.exception.BusinessException;
import com.gitegg.platform.boot.common.exception.SystemException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.ui.Model;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingPathVariableException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
import org.springframework.web.servlet.NoHandlerFoundException;
import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;
import javax.validation.ConstraintViolationException;
@Slf4j
@RestControllerAdvice
public class GitEggControllerAdvice {
/**
* service name
*/
@Value("${spring.application.name}")
private String serverName;
/**
* Microservice system identification
*/
private String errorSystem;
@PostConstruct
public void init() {
this.errorSystem = new StringBuffer()
.append(this.serverName)
.append(": ").toString();
}
/**
* Apply to all @RequestMapping Annotation method , Initialize the data binder before it executes
*/
@InitBinder
public void initBinder(WebDataBinder binder) {
}
/**
* Bind values to Model in , Make global @RequestMapping You can get the value
*/
@ModelAttribute
public void addAttributes(Model model) {
}
/**
* Global exception capture processing
*/
@ExceptionHandler(value = {Exception.class})
public Result handlerException(Exception exception, HttpServletRequest request) {
log.error(" Request path uri={}, An exception occurred inside the system :{}", request.getRequestURI(), exception);
Result result = Result.error(ResultCodeEnum.ERROR, errorSystem + exception.toString());
return result;
}
/**
* Illegal request exception
*/
@ExceptionHandler(value = {
HttpMediaTypeNotAcceptableException.class,
HttpMediaTypeNotSupportedException.class,
HttpRequestMethodNotSupportedException.class,
MissingServletRequestParameterException.class,
NoHandlerFoundException.class,
MissingPathVariableException.class,
HttpMessageNotReadableException.class
})
public Result handlerSpringAOPException(Exception exception) {
Result result = Result.error(ResultCodeEnum.ILLEGAL_REQUEST, errorSystem + exception.getMessage());
return result;
}
/**
* Illegal request exception - Parameter type mismatch
*/
@ExceptionHandler(value = MethodArgumentTypeMismatchException.class)
public Result handlerSpringAOPException(MethodArgumentTypeMismatchException exception) {
Result result = Result.error(ResultCodeEnum.PARAM_TYPE_MISMATCH, errorSystem + exception.getMessage());
return result;
}
/**
* Illegal request - Parameter checking
*/
@ExceptionHandler(value = {MethodArgumentNotValidException.class})
public Result handlerMethodArgumentNotValidException(MethodArgumentNotValidException methodArgumentNotValidException) {
// Get the exception field and the corresponding exception information
StringBuffer stringBuffer = new StringBuffer();
methodArgumentNotValidException.getBindingResult().getFieldErrors().stream()
.map(t -> t.getField()+"=>"+t.getDefaultMessage()+" ")
.forEach(e -> stringBuffer.append(e));
String errorMessage = stringBuffer.toString();
Result result = Result.error(ResultCodeEnum.PARAM_VALID_ERROR, errorSystem + errorMessage);
return result;
}
/**
* Illegal request exception - Parameter checking
*/
@ExceptionHandler(value = {ConstraintViolationException.class})
public Result handlerConstraintViolationException(ConstraintViolationException constraintViolationException) {
String errorMessage = constraintViolationException.getLocalizedMessage();
Result result = Result.error(ResultCodeEnum.PARAM_VALID_ERROR, errorSystem + errorMessage);
return result;
}
/**
* Custom business exception -BusinessException
*/
@ExceptionHandler(value = {BusinessException.class})
public Result handlerCustomException(BusinessException exception) {
String errorMessage = exception.getMsg();
Result result = Result.error(exception.getCode(), errorSystem + errorMessage);
return result;
}
/**
* Custom system exceptions -SystemException
*/
@ExceptionHandler(value = {SystemException.class})
public Result handlerCustomException(SystemException exception) {
String errorMessage = exception.getMsg();
Result result = Result.error(exception.getCode(), errorSystem + errorMessage);
return result;
}
}
6、 Re GitEgg-Platform Conduct install, stay GitEgg-Cloud Medium gitegg-service introduce gitegg-platform-boot
<!--?xml version="1.0" encoding="UTF-8"?-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactid>GitEgg-Cloud</artifactid>
<groupid>com.gitegg.cloud</groupid>
<version>1.0-SNAPSHOT</version>
</parent>
<modelversion>4.0.0</modelversion>
<artifactid>gitegg-service</artifactid>
<packaging>pom</packaging>
<modules>
<module>gitegg-service-base</module>
<module>gitegg-service-bigdata</module>
<module>gitegg-service-system</module>
</modules>
<dependencies>
<!-- gitegg Spring Boot Customization and extension -->
<dependency>
<groupid>com.gitegg.platform</groupid>
<artifactid>gitegg-platform-boot</artifactid>
</dependency>
<!-- gitegg Database driver and connection pool -->
<dependency>
<groupid>com.gitegg.platform</groupid>
<artifactid>gitegg-platform-db</artifactid>
</dependency>
<!-- gitegg mybatis-plus -->
<dependency>
<groupid>com.gitegg.platform</groupid>
<artifactid>gitegg-platform-mybatis</artifactid>
</dependency>
<!-- gitegg swagger2-knife4j -->
<dependency>
<groupid>com.gitegg.platform</groupid>
<artifactid>gitegg-platform-swagger</artifactid>
</dependency>
<!-- spring boot web Core packages -->
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-web</artifactid>
</dependency>
<!-- spring boot Health monitoring -->
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-actuator</artifactid>
</dependency>
</dependencies>
</project>
7、 modify SystemController.java、ISystemService.java and SystemServiceImpl.java Add test code for exception handling
SystemController.java:
package com.gitegg.service.system.controller;
import com.gitegg.platform.boot.common.base.Result;
import com.gitegg.platform.boot.common.exception.BusinessException;
import com.gitegg.service.system.service.ISystemService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.AllArgsConstructor;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping(value = "system")
@AllArgsConstructor
@Api(tags = "gitegg-system")
public class SystemController {
private final ISystemService systemService;
@GetMapping(value = "list")
@ApiOperation(value = "system list Interface ")
public Object list() {
return systemService.list();
}
@GetMapping(value = "page")
@ApiOperation(value = "system page Interface ")
public Object page() {
return systemService.page();
}
@GetMapping(value = "exception")
@ApiOperation(value = " Custom exception and return test interface ")
public Result<string> exception() {
return Result.data(systemService.exception());
}
}
ISystemService.java:
package com.gitegg.service.system.service;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.gitegg.service.system.entity.SystemTable;
import java.util.List;
public interface ISystemService {
List<systemtable> list();
Page<systemtable> page();
String exception();
}
SystemServiceImpl.java:
package com.gitegg.service.system.service.impl;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.gitegg.platform.boot.common.exception.BusinessException;
import com.gitegg.service.system.entity.SystemTable;
import com.gitegg.service.system.mapper.SystemTableMapper;
import com.gitegg.service.system.service.ISystemService;
import lombok.AllArgsConstructor;
import org.springframework.stereotype.Service;
import java.util.List;
/**
*
*/
@Service
@AllArgsConstructor
public class SystemServiceImpl implements ISystemService {
private final SystemTableMapper systemTableMapper;
@Override
public List<systemtable> list() {
return systemTableMapper.list();
}
@Override
public Page<systemtable> page() {
Page<systemtable> page = new Page<>(1, 10);
List<systemtable> records = systemTableMapper.page(page);
page.setRecords(records);
return page;
}
@Override
public String exception() {
throw new BusinessException(" Custom exception ");
// return " Successful data acquisition ";
}
}
8、 function GitEggSystemApplication, Open browser access ：http://127.0.0.1:8001/doc.html, Then click the exception handling interface on the left , Use Swagger2 To test , You can see the result
This article source code in https://gitee.com/wmz1930/GitEgg Of chapter-07 Branch .
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