Question

我借着眼光探讨了这个议题,并看到了一些最佳做法。但我需要一些具体的建议。我正在准备一份J2EE仪器,该仪器从JP s处向DAO提供。因此,这是各种东西。大部分数据都是通过存储程序进行的,由iBatis ORM/Spring提出。有时,在SP一侧发生错误时,它将向用户传递一个简单的信息,例如:

javax.servlet.ServletException: org.springframework.jdbc.BadSqlGrammarException: SqlMapClient operation; bad SQL grammar []; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   
--- The error occurred in debtowed.xml.  
--- The error occurred while applying a parameter map.  
--- Check the debtowed.getFormerTenantData.  
--- Check the statement (update procedure failed).  
--- Cause: java.sql.SQLException: ORA-06550: line 1, column 11:
PLS-00905: object package.GET_FORMER_ADDRESS is invalid
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

Caused by: java.sql.SQLException: ORA-06550: line 1, column 11:
PLS-00905: object package.GET_FORMER_ADDRESS is invalid
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

At this point the above information is displayed in the browser and logged to server.log.
However, I want to do following:

Present user with custom error page
log the errors in myapp.log instead of server.log (we do this in some other places as we use log4j)

les告诉我,这样做的最佳方式是什么? 我是否应在网上添加一些内容? 就像听众一样? 这将是唯一的变化,还是我必须修改现行法典?

该法典没有检查任何错误。它只是说下面的SP。

getSqlMapClientTemplate().queryForList("sp.getfmrAddy", paramMap);

Answer 1

我期望斯特鲁特人已经以某种方式解决这一问题,因此,最好的检查是休战。如果是你的话,你会写一个可以总结你的电灯的特例:

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

public class ExceptionFilter implements Filter{

private static final Logger logger = Logger.getLogger(ExceptionFilter.class);
private ExceptionService exceptionService = null;
@Override
public void destroy() {
    exceptionService.shutdown();
}

@Override
public void doFilter(ServletRequest rq, ServletResponse rs, FilterChain chain) throws IOException, ServletException {
    try {
        chain.doFilter(rq, rs); // this calls the servlet which is where your exceptions will bubble up from
    } catch (Throwable t) {
        // deal with exception, then do redirect to custom jsp page
        logger.warn(t);
        exceptionService.dealWithException(t); // you could have a service to track counts of exceptions / log them to DB etc
        HttpServletResponse response = (HttpServletResponse) resp;
        response.sendRedirect("somejsp.jsp");
    }
}

@Override
public void init(FilterConfig arg0) throws ServletException {
    // TODO Auto-generated method stub
    exceptionService = new ExceptionService();
}

}

在您的网站上添加:

<filter>
  <filter-name>ExceptionFilter</filter-name>
  <filter-class>com.example.ExceptionFilter</filter-class>
</filter>

<filter-mapping>
  <filter-name>ExceptionFilter</filter-name>
  <servlet-name>MyMainServlet</servlet-name>
</filter-mapping>

然后,增加所有服务器的过滤图。

希望会有所帮助。

Answer 2

可在前端使用每一种财产方法宣布其易于使用。在前端,如果你想要在用户使用h:message tag in xhtml or jsf, 或者还有 f:ajax处理标签错误

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