package cn.ksource.web.exception;

import org.apache.log4j.Logger;
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.PrintWriter;
import java.io.StringWriter;

/**
 * 自定义异常处理
 *
 * @author zxl
 */
public class ExceptionHandler implements HandlerExceptionResolver {

    private static Logger logger = org.apache.log4j.Logger.getLogger(ExceptionHandler.class);

    public void setDefaultError(String defaultError) {
        this.defaultError = defaultError;
    }


    private String defaultError;

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object obj, Exception ex) {
        //记录日志
        StringWriter sw=new StringWriter();
        PrintWriter pw=new PrintWriter(sw);
        ex.printStackTrace(pw);

        logger.error(sw.toString());

        ModelAndView mView = new ModelAndView();
        String viewName = defaultError;//系统程序异常
        mView.setViewName(viewName);
        mView.addObject("msg", ex.getMessage());
        return mView;
    }

}