package io.github.dunwu.javaee.filter;

import io.github.dunwu.javaee.filter.exception.AccountException;

import io.github.dunwu.javaee.filter.exception.BusinessException;

import java.io.IOException;

import javax.servlet.FilterChain;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

/**

* @author <a href="mailto:forbreak@163.com">Zhang Peng</a>

* @since 2017/3/27.

*/

public class ExceptionHandlerFilter extends MyFilter {

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

throws IOException, ServletException {

try {

chain.doFilter(request, response);

} catch (Exception e) {

logger.info("{} 捕捉到异常", this.getClass().getName());

Throwable rootCause = e;

while (rootCause.getCause() != null) {

rootCause = rootCause.getCause();

}

String message = rootCause.getMessage();

message = message == null ? "异常：" + rootCause.getClass().getName() : message;

request.setAttribute("message", message);

request.setAttribute("e", e);

if (rootCause instanceof AccountException) {

request.getRequestDispatcher("/views/jsp/accountException.jsp").forward(request, response);

} else if (rootCause instanceof BusinessException) {

request.getRequestDispatcher("/views/jsp/businessException.jsp").forward(request, response);

} else {

request.getRequestDispatcher("/views/jsp/exception.jsp").forward(request, response);

}

}

}

}