springboot统一异常处理HandlerExceptionResolver

àì夳堔傛蜴生んèń 2022-03-15 15:22 416阅读 0赞

web项目中通常需要将异常统一处理，返回到指定的500 400页面。可以spring的HandlerExceptionResolver接口来捕获所有的异常。

*  实现HandlerExceptionResolver

import lombok.extern.slf4j.Slf4j;
    import org.springframework.stereotype.Component;
    import org.springframework.web.servlet.HandlerExceptionResolver;
    import org.springframework.web.servlet.ModelAndView;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /** * Created by ibm on 2019/3/3. */
    @Slf4j
    @Component
    public class GlobalExpetion implements HandlerExceptionResolver { 
        @Override
        public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) { 
    
    
            log.info("系统发生异常");
            // 统一处理异常
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.addObject("message", "系统发生异常，请稍后重试");
            modelAndView.setViewName("/500");
            return modelAndView;
        }
    }

*  controller

import com.yanming.test.dto.Person;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.servlet.ModelAndView;
    
    import javax.servlet.ServletInputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.ObjectInputStream;
    
    @Slf4j
    @RestController
    @RequestMapping("/test")
    public class TestController { 
    
        @RequestMapping(value = "/test1")
        public String helloWorld(HttpServletRequest request, HttpServletResponse response) throws Exception { 
            log.info("test------------------------");
            throw new Exception("错误");
        }

*  页面渲染thymeleaf

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-thymeleaf</artifactId>
            </dependency>

**thymeleaf加载页面默认从/src/main/resources/templates目录中**

*  页面  
    500.html

<!DOCTYPE HTML>
    <html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title>500</title>
    </head>
    <body>
    <p th:text="'Exception： ' + ${message}" /><br/>
    <br/>
    
    </body>
    </html>

*  application

#MVC
    spring.mvc.view.prefix=/
    
    # http server port
    server.port=${http.port:8060}

启动执行，访问http://localhost:8060/test/test1  
![在这里插入图片描述][20190303191911976.png]

[20190303191911976.png]: /images/20220315/b5ffd627199d45cc85442b351265a6c3.png