项目异常统一处理-spring+springmvc

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>

<!--异常统一处理类,统一跳转到error页面 -->
<bean id="lgCenterExceptionHandler" class="com.xx.xx.web.filter.LgCenterExceptionHandler"></bean>

package com.xx.xx.web.filter;

import com.xx.xx.common.BusinessException;
import com.xx.lgcenter.web.common.constant.LgCenterConstants;
import org.apache.shiro.SecurityUtils;
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;
import java.util.HashMap;
import java.util.Map;

/**
* 异常统一处理
* Created by xx.
*/
public class LgCenterExceptionHandler implements HandlerExceptionResolver {
private static final Logger LOGGER= LoggerFactory.getLogger(LgCenterExceptionHandler.class);

@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
LOGGER.error("Catch Exception:",ex);//捕捉漏网的异常日志
if(ex instanceof BusinessException){
//设置编码
response.setStatus(500);
response.setCharacterEncoding("UTF-8");
//服务器响应类型
response.setContentType("text/html");
//获得输出流
PrintWriter out = null;
try {
out = response.getWriter();
} catch (IOException e) {
LOGGER.error("Catch Exception:",e);//捕捉漏网的异常日志
out.print("捕获业务异常时,发生IO异常");
out.close();
}
out.print(ex.getMessage());
out.close();
}
// 放入异常信息
Map<String, Object> model = new HashMap<String, Object>();
model.put("ex", ex);

// 可以根据不同的异常(ex)类型跳转到不同页面,便于以后扩展
return new ModelAndView("/error/error2", model);
}
}