如何构建一个权限项目这里接着我们上次说的来编写代码,我们这个点主要讲的是接口请求全局异常处理,
接下来跟我一起看我编写的代码如何实现的,首先我们要定义一个全局异常的处理类,在common包下建一个类SpringExceptionResolver:
package cn.oyc.common;
import cn.oyc.exception.ParamException;
import cn.oyc.exception.PermissionException;
import lombok.extern.slf4j.Slf4j;
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;
@Slf4j
public class SpringExceptionResolver implements HandlerExceptionResolver {
private final Logger logger = LoggerFactory.getLogger(SpringExceptionResolver.class);
@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o, Exception ex) {
String url = request.getRequestURL().toString();
ModelAndView mv;
String defaultMsg = "System error";
// 这里我们要求项目中所有请求json数据,都是用.json结尾
if (url.endsWith(".json")){
if (ex instanceof PermissionException || ex instanceof ParamException){
JsonData result = JsonData.fail(ex.getMessage());
mv = new ModelAndView("jsonView",result.toMap());
}else{
logger.error("unknown json exception, url:"+url,ex);
JsonData result = JsonData.fail(defaultMsg);
mv = new ModelAndView("jsonView",result.toMap());
}
}else if (url.endsWith(".page")){ // 这里我们要求项目中所有请求page页面,都是用.page结尾
logger.error("unknown exception, url:"+url,ex);
JsonData result = JsonData.fail(defaultMsg);
mv = new ModelAndView("exception",result.toMap());
}else{
logger.error("unknown exception, url:"+url,ex);
JsonData result = JsonData.fail(defaultMsg);
mv = new ModelAndView("jsonView",result.toMap());
}
return mv;
}
}
在这些代码的基础下我们还需要在pom文件导入相关依赖,相关依赖如下:
<!--jsp api-->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>jsp-api</artifactId>
<version>6.0.36</version>
</dependency>
还需要定义我们自己的异常,建立一个exception包,然后建一个PermissionException类:
package cn.oyc.exception;
/**
* 自己定义的异常类
* */
public class PermissionException extends RuntimeException {
public PermissionException() {
super();
}
public PermissionException(String message) {
super(message);
}
public PermissionException(String message, Throwable cause) {
super(message, cause);
}
public PermissionException(Throwable cause) {
super(cause);
}
protected PermissionException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}
我们的定义的一个全局异常如果page出现异常找的execption需要我们在views文件夹下创建一个execption.jsp文件:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Exception</title>
</head>
<body>
</body>
</html>
这里我们先不做请求,等后续在完善
然后在我们的spring-servlet.xml下加上一个bean:
<bean class="cn.oyc.common.SpringExceptionResolver"/>
我们的接口请求全局异常处理就讲到这里后续请关注下一章
原文地址：https://www.cnblogs.com/Myoyc/p/12231464.html
时间： 2024-11-05 22:44:10