spring-boot-demo-exception-handler

<?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">
	<modelVersion>4.0.0</modelVersion>

	<artifactId>spring-boot-demo-exception-handler</artifactId>
	<version>1.0.0-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>spring-boot-demo-exception-handler</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>com.xkcoding</groupId>
		<artifactId>spring-boot-demo</artifactId>
		<version>1.0.0-SNAPSHOT</version>
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
	</dependencies>

	<build>
		<finalName>spring-boot-demo-exception-handler</finalName>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

/**
 * <p>
 * 通用的 API 接口封装
 * </p>
 *
 * @author yangkai.shen
 * @date Created in 2018-10-02 20:57
 */
@Data
public class ApiResponse {
	/**
	 * 状态码
	 */
	private Integer code;

	/**
	 * 返回内容
	 */
	private String message;

	/**
	 * 返回数据
	 */
	private Object data;

	/**
	 * 无参构造函数
	 */
	private ApiResponse() {

	}

	/**
	 * 全参构造函数
	 *
	 * @param code    状态码
	 * @param message 返回内容
	 * @param data    返回数据
	 */
	private ApiResponse(Integer code, String message, Object data) {
		this.code = code;
		this.message = message;
		this.data = data;
	}

	/**
	 * 构造一个自定义的API返回
	 *
	 * @param code    状态码
	 * @param message 返回内容
	 * @param data    返回数据
	 * @return ApiResponse
	 */
	public static ApiResponse of(Integer code, String message, Object data) {
		return new ApiResponse(code, message, data);
	}

	/**
	 * 构造一个成功且带数据的API返回
	 *
	 * @param data 返回数据
	 * @return ApiResponse
	 */
	public static ApiResponse ofSuccess(Object data) {
		return ofStatus(Status.OK, data);
	}

	/**
	 * 构造一个成功且自定义消息的API返回
	 *
	 * @param message 返回内容
	 * @return ApiResponse
	 */
	public static ApiResponse ofMessage(String message) {
		return of(Status.OK.getCode(), message, null);
	}

	/**
	 * 构造一个有状态的API返回
	 *
	 * @param status 状态 {@link Status}
	 * @return ApiResponse
	 */
	public static ApiResponse ofStatus(Status status) {
		return ofStatus(status, null);
	}

	/**
	 * 构造一个有状态且带数据的API返回
	 *
	 * @param status 状态 {@link Status}
	 * @param data   返回数据
	 * @return ApiResponse
	 */
	public static ApiResponse ofStatus(Status status, Object data) {
		return of(status.getCode(), status.getMessage(), data);
	}

	/**
	 * 构造一个异常且带数据的API返回
	 *
	 * @param t    异常
	 * @param data 返回数据
	 * @param <T>  {@link BaseException} 的子类
	 * @return ApiResponse
	 */
	public static <T extends BaseException> ApiResponse ofException(T t, Object data) {
		return of(t.getCode(), t.getMessage(), data);
	}

	/**
	 * 构造一个异常且带数据的API返回
	 *
	 * @param t   异常
	 * @param <T> {@link BaseException} 的子类
	 * @return ApiResponse
	 */
	public static <T extends BaseException> ApiResponse ofException(T t) {
		return ofException(t, null);
	}
}

/**
 * <p>
 * 统一异常处理
 * </p>
 *
 * @author yangkai.shen
 * @date Created in 2018-10-02 21:26
 */
@ControllerAdvice
@Slf4j
public class DemoExceptionHandler {
	private static final String DEFAULT_ERROR_VIEW = "error";

	/**
	 * 统一 json 异常处理
	 *
	 * @param exception JsonException
	 * @return 统一返回 json 格式
	 */
	@ExceptionHandler(value = JsonException.class)
	@ResponseBody
	public ApiResponse jsonErrorHandler(JsonException exception) {
		log.error("【JsonException】:{}", exception.getMessage());
		return ApiResponse.ofException(exception);
	}

	/**
	 * 统一 页面 异常处理
	 *
	 * @param exception PageException
	 * @return 统一跳转到异常页面
	 */
	@ExceptionHandler(value = PageException.class)
	public ModelAndView pageErrorHandler(PageException exception) {
		log.error("【DemoPageException】:{}", exception.getMessage());
		ModelAndView view = new ModelAndView();
		view.addObject("message", exception.getMessage());
		view.setViewName(DEFAULT_ERROR_VIEW);
		return view;
	}
}

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head lang="en">
	<meta charset="UTF-8"/>
	<title>统一页面异常处理</title>
</head>
<body>
<h1>统一页面异常处理</h1>
<div th:text="${message}"></div>
</body>
</html>