前言
当系统发生时, spring boot会自动处理异常, 这里通过自定义统一处理异常进行处理。
pom.xml文件
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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 http://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>2.1.6.RELEASE</version>
<relativePath/>
</parent>
<groupId>com.huzh</groupId>
<artifactId>springboot-error</artifactId>
<version>1.0-SNAPSHOT</version>
<name>springboot-error</name>
<description>springboot-error</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
|
创建一个IndexController类，定义一个正常方法和一个错误方法
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| @RestController
public class IndexController {
@RequestMapping("/")
public String indesx() {
return "index";
}
@RequestMapping("/test")
public String test() {
Map map = null;
return map.toString();
}
}
|
访问项目，分析结果
访问http://localhost:8080/aa, 如下
访问http://localhost:8080/test, 如下
创建异常处理类CommonErrorController
从上图可以看到，springboot报错的时候都在找/error这个地址，这时我们新建一个CommonErrorController来统一处理异常，这个类实现了ErrorController。
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| @RestController
public class CommonErrorController implements ErrorController {
private final String ERROR_PATH = "/error";
@Override
public String getErrorPath() {
return ERROR_PATH;
}
@RequestMapping(value = ERROR_PATH)
public String handleError() {
System.out.println(getErrorPath());
return "error";
}
}
|
