SpringBoot 统一异常处理详解

<?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>

 <groupid>bsea</groupid>
 <artifactid>springbootexception</artifactid>
 <version>1.0-snapshot</version>
 <packaging>jar</packaging>
 <parent>
  <groupid>org.springframework.boot</groupid>
  <artifactid>spring-boot-starter-parent</artifactid>
  <version>1.5.14.release</version>
  <relativepath/> <!-- lookup parent from repository -->
 </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-web</artifactid>
  </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>

package com.zz;

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;

@springbootapplication
public class app {
 public static void main(string[] args) {
  springapplication.run(app.class,args);
 }
}

package com.zz.exception;

public class usernotexistexception extends runtimeexception{
 private static final long serialversionuid = -1574716826948451793l;

 private string id;

 public usernotexistexception(string id){
  super("user not exist");
  this.id = id;
 }

 public string getid() {
  return id;
 }

 public void setid(string id) {
  this.id = id;
 }
}

package com.zz.handler;

import com.zz.exception.usernotexistexception;
import org.springframework.http.httpstatus;
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.responsestatus;

import java.util.hashmap;
import java.util.map;

@controlleradvice
public class controllerexceptionhandler {
 //返回json的错误信息
 @exceptionhandler(usernotexistexception.class)
 @responsebody
 @responsestatus(httpstatus.internal_server_error)
 public map<string, object> handleusernotexistsexception(usernotexistexception e) {
  map<string, object> map = new hashmap<>();
  map.put("id", e.getid());
  map.put("message", e.getmessage());
  return map;
 }
 //错误以后，跳转到自己定义的错误页面
 @exceptionhandler(arithmeticexception.class)
 public string handle1(arithmeticexception e) {
  system.out.println("handle1 500*到了**************");
  return "/500.html";
 }
}

package com.zz.controller;

import com.zz.exception.usernotexistexception;
import org.springframework.web.bind.annotation.getmapping;
import org.springframework.web.bind.annotation.pathvariable;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.restcontroller;

@restcontroller
@requestmapping("user")
public class usercontroller {

 @getmapping("/{id:\\d+}")
 public void get(@pathvariable string id) {

  throw new usernotexistexception(id);
 }
 @getmapping("error2")
 public void get2() {
  int a=1/0;
 }
}