Springmvc自定义统一异常处理

最新推荐文章于 2022-07-04 16:17:42 发布

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最新推荐文章于 2022-07-04 16:17:42 发布

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文章标签： java python

原文链接：https://my.oschina.net/u/2526015/blog/748122

本文介绍如何在Spring MVC项目中实现自定义异常处理流程，包括修改pom.xml依赖、创建自定义异常处理类DemoExceptionResolver，并将其注入到Spring容器中进行测试。

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1.默认异常处理（不友好）

2.自定义统一异常处理流程

1）demo-base中pom.xml修改

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

2）自定义异常处理类-DemoExceptionResolver

在demo-base中定义DemoExceptionResolver，实现HandlerExceptionResolver接口即可

package com.demo.base.Exception;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class DemoExceptionResolver implements HandlerExceptionResolver {
    private static final Logger LOG = LoggerFactory.getLogger(DemoExceptionResolver.class);

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex){
        response.setHeader("Content-type", "text/html;charset=UTF-8");
        response.setCharacterEncoding("UTF-8");

        PrintWriter pw = null;
        try {
            pw = response.getWriter();
        } catch (IOException e) {
            LOG.error(e.getMessage(),e);
        }

        if (ex instanceof DemoException) {
            pw.write(ex.getMessage());
        } else {
            pw.write("系统异常，请联系管理员");
        }

        return new ModelAndView();
    }
}

3）DemoExceptionResolver注入到Spring容器中

在demo-web中spring-mvc.xml配置:

<bean id="demoExceptionResolver" class="com.demo.base.Exception.DemoExceptionResolver"/>

4）运行测试结果

3.参考文章

http://www.voidcn.com/blog/eson_15/article/p-6069524.html

转载于:https://my.oschina.net/u/2526015/blog/748122