feat:增加统一异常处理

spring-boot/exceptionTest/.gitignore

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+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

spring-boot/exceptionTest/pom.xml

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+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.5</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.fanxb</groupId>
+    <artifactId>exceptionTest</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>exceptionTest</name>
+    <description>Demo project for Spring Boot</description>
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${project.parent.version}</version>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/ExceptionTestApplication.java

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+package com.fanxb.exceptiontest;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ExceptionTestApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ExceptionTestApplication.class, args);
+    }
+
+}

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/config/ExceptionHandle.java

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+package com.fanxb.exceptiontest.config;
+
+import com.fanxb.exceptiontest.entity.Result;
+import com.fanxb.exceptiontest.entity.exception.BaseException;
+import com.fanxb.exceptiontest.entity.exception.CustomBusinessException;
+import com.fasterxml.jackson.databind.ser.Serializers;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+/**
+ * @author fanxb
+ * @date 2021-09-24-下午4:37
+ */
+@RestControllerAdvice
+@Slf4j
+public class ExceptionHandle {
+    @ExceptionHandler(Exception.class)
+    public Result handleException(Exception e) {
+        BaseException be;
+        if (e instanceof BaseException) {
+            be = (BaseException) e;
+            //手动抛出的异常，仅记录message
+            log.info("baseException:{}", be.getMessage());
+            if (be instanceof CustomBusinessException) {
+                //可在这里进行一些针对特定异常的处理逻辑
+                log.info("customBusinessException:{}", be.getMessage());
+            }
+        } else {
+            //其它异常，非自动抛出的,无需给前端返回具体错误内容（用户不需要看见空指针之类的异常信息）
+            log.error("other exception:{}", e.getMessage(), e);
+            be = new BaseException("系统异常，请稍后重试", e);
+        }
+        return new Result(be.getCode(), be.getMessage(), null);
+    }
+}

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/controller/TestController.java

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+package com.fanxb.exceptiontest.controller;
+
+import com.fanxb.exceptiontest.entity.Result;
+import com.fanxb.exceptiontest.entity.exception.BaseException;
+import com.fanxb.exceptiontest.entity.exception.CustomBusinessException;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author fanxb
+ * @date 2021-09-24-下午4:46
+ */
+@RestController
+public class TestController {
+
+    @GetMapping("/test1")
+    public Result test1() {
+        throw new BaseException("我是test1", null);
+    }
+
+    @GetMapping("/test2")
+    public Result test2() {
+        throw new CustomBusinessException("我是test2", null);
+    }
+
+    @GetMapping("/test3")
+    public Result test3() {
+        throw new RuntimeException("我是test2");
+    }
+}

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/entity/Result.java

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+package com.fanxb.exceptiontest.entity;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+/**
+ * @author fanxb
+ * @date 2021-09-24-下午4:39
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Result implements Serializable {
+    private static final long serialVersionUID = 451834802206432869L;
+    /**
+     * 1：成功,其他失败,具体数值在自定义的异常类中
+     */
+    private int code;
+    /**
+     * message提示内容，当接口异常时提示异常信息
+     */
+    private String message;
+    /**
+     * 携带真正需要返回的数据
+     */
+    private Object data;
+
+    public static Result success(Object obj) {
+        return new Result(1, null, obj);
+    }
+}

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/entity/exception/BaseException.java

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+package com.fanxb.exceptiontest.entity.exception;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+
+/**
+ * @author fanxb
+ * @date 2021-09-24-下午5:13
+ */
+@Getter
+public class BaseException extends RuntimeException {
+    private static final long serialVersionUID = -3149747381632839680L;
+    /**
+     * 基本错误code为0
+     */
+    private static final int BASE_CODE = 0;
+    private final int code;
+    private final String message;
+
+    public BaseException() {
+        this(null, null, null);
+    }
+
+    public BaseException(String message) {
+        this(message, null, null);
+    }
+
+    public BaseException(Exception e) {
+        this(null, null, e);
+    }
+
+    public BaseException(String message, Exception e) {
+        this(message, null, e);
+    }
+
+    protected BaseException(String message, Integer code, Exception e) {
+        super(e);
+        this.message = message == null ? "" : message;
+        this.code = code == null ? BASE_CODE : code;
+    }
+
+    @Override
+    public String getMessage() {
+        if (this.message != null && this.message.length() > 0) {
+            return this.message;
+        }
+        return super.getMessage();
+    }
+}

spring-boot/exceptionTest/src/main/java/com/fanxb/exceptiontest/entity/exception/CustomBusinessException.java

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+package com.fanxb.exceptiontest.entity.exception;
+
+/**
+ * @author fanxb
+ * @date 2021-09-26-上午10:41
+ */
+public class CustomBusinessException extends BaseException {
+    private static final long serialVersionUID = 1564935267302330109L;
+
+    /**
+     * 自定义业务异常错误码
+     */
+    private static final int ERROR_CODE = -1;
+
+    public CustomBusinessException() {
+        super("自定义义务异常", ERROR_CODE, null);
+    }
+
+    public CustomBusinessException(String message, Exception e) {
+        super(message, ERROR_CODE, e);
+    }
+}

spring-boot/exceptionTest/src/main/resources/application.properties

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+