springboot全局异常处理详解
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2024-02-22 18:01:35
一、单个controller范围的异常处理
package com.xxx.secondboot.web;
import org.springframe...
一、单个controller范围的异常处理
package com.xxx.secondboot.web; import org.springframework.web.bind.annotation.exceptionhandler; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestmethod; import org.springframework.web.bind.annotation.restcontroller; import com.xxx.secondboot.exception.myexceptionresponse; import io.swagger.annotations.api; @api("测试controlleradvice和全局异常处理") @restcontroller @requestmapping("/advice1") public class advicecontroller { @requestmapping(value = "/test1", method = requestmethod.get) public string test1() { throw new runtimeexception("advice1 - exception1"); } @requestmapping(value = "/test2", method = requestmethod.get) public string test2() { throw new runtimeexception("advice1 - exception2"); } @exceptionhandler(runtimeexception.class) public myexceptionresponse exceptionhandler() { myexceptionresponse resp = new myexceptionresponse(); resp.setcode(300); resp.setmsg("exception-handler"); return resp; } }
说明:
- 在controller中加入被@exceptionhandler修饰的类即可(在该注解中指定该方法需要处理的那些异常类)
- 该异常处理方法只在当前的controller中起作用
二、全部controller范围内起作用的异常处理(全局异常处理)
1、全局异常处理类
package com.xxx.secondboot.web; import javax.servlet.http.httpservletresponse; import org.springframework.web.bind.annotation.controlleradvice; import org.springframework.web.bind.annotation.exceptionhandler; import org.springframework.web.bind.annotation.responsebody; import org.springframework.web.bind.annotation.restcontroller; import com.xxx.secondboot.exception.myexceptionresponse; import com.xxx.secondboot.exception.myruntimeexception; //@controlleradvice(annotations=restcontroller.class) //@controlleradvice(basepackages={"com.xxx","com.ooo"}) @controlleradvice public class globalexceptionhandler { @exceptionhandler(runtimeexception.class) // @exceptionhandler(value={runtimeexception.class,myruntimeexception.class}) // @exceptionhandler//处理所有异常 @responsebody //在返回自定义相应类的情况下必须有,这是@controlleradvice注解的规定 public myexceptionresponse exceptionhandler(runtimeexception e, httpservletresponse response) { myexceptionresponse resp = new myexceptionresponse(); resp.setcode(300); resp.setmsg("exception-handler"); // response.setstatus(600); return resp; } }
说明:
- @controlleradvice是controller的一个辅助类,最常用的就是作为全局异常处理的切面类
- @controlleradvice可以指定扫描范围
- @controlleradvice约定了几种可行的返回值,如果是直接返回model类的话,需要使用@responsebody进行json转换
- 返回string,表示跳到某个view
- 返回modelandview
- 返回model + @responsebody
2、controller
package com.xxx.secondboot.web; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestmethod; import org.springframework.web.bind.annotation.restcontroller; import io.swagger.annotations.api; @api("测试controlleradvice和全局异常处理") @restcontroller @requestmapping("/advice1") public class advicecontroller { @requestmapping(value = "/test1", method = requestmethod.get) public string test1() { throw new runtimeexception("advice1 - exception1"); } @requestmapping(value = "/test2", method = requestmethod.get) public string test2() { throw new runtimeexception("advice1 - exception2"); } // @exceptionhandler(runtimeexception.class) // public myexceptionresponse exceptionhandler() { // myexceptionresponse resp = new myexceptionresponse(); // resp.setcode(300); // resp.setmsg("exception-handler"); // return resp; // } }
注意:
- 同一个异常被局部范围异常处理器和全局范围异常处理器同时覆盖,会选择小范围的局部范围处理器
- 同一个异常被小范围的异常类和大范围的异常处理器同时覆盖,会选择小范围的异常处理器
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