SpringBoot 全局异常配置及返回自定义页面

1. 全局异常的配置

1. 创建异常处理类

package com.test.spring_boot_demo.domain;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

@RestControllerAdvice
public class CustomExtHandler {

private static final Logger LOG = LoggerFactory.getLogger(CustomExtHandler.class);

//  捕获全局异常，处理所有不可知的异常
@ExceptionHandler(value = Exception.class)
// @ResponseBody
Object handleException(Exception e, HttpServletRequest request) {
LOG.error("url {}, msg {}", request.getRequestURL(), e.getMessage());
Map<String, Object> map = new HashMap<>();
map.put("code", "100");
map.put("msg", e.getMessage());
map.put("url", request.getRequestURL());
return map;
}

}

2. 创建controller接口

@GetMapping("/test/exception")
public Object testException() {
int n = 1/0;
return "test exception";
}

3. 访问测试

http://localhost:8080/test/exception

{"msg":"/ by zero","code":"100","url":"http://localhost:8080/test/exception"}

2. 触发异常返回自定义页面

1. 官网介绍

2. 添加模板引擎依赖

<!-- 模板引擎 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

3. 添加自定义异常类

package com.test.spring_boot_demo.domain;

public class MyException extends RuntimeException {

private String code;
private String msg;

public MyException(String code, String msg) {
this.code = code;
this.msg = msg;
}

public String getCode() {
return code;
}

public void setCode(String code) {
this.code = code;
}

public String getMsg() {
return msg;
}

public void setMsg(String msg) {
this.msg = msg;
}
}

4. 添加自定义异常监听器

@ExceptionHandler(value = MyException.class)
Object handleMyException(MyException e) {
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("error.html");
modelAndView.addObject("msg", e.getMessage());
return modelAndView;
}

5. 添加Http请求接口

@GetMapping("/test/myexception")
public Object myexc() {
throw new MyException("500", "my ext 异常");
}

6. 测试

http://localhost:8080/test/myexception

出异常 template