?? dispatcherfilter.java
字號:
package com.j2ee14.ch9;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Locale;
public class DispatcherFilter implements Filter
{
//初始化filter
public void init(FilterConfig config) throws ServletException {
}
/**
*具體的過濾方法
*/
public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain chain)
throws IOException, ServletException
{
HttpServletRequest request = (HttpServletRequest)srequest;
java.util.Enumeration params=request.getParameterNames();
//把請求中所有參數類型為String的對象值設置轉為大寫。
while(params.hasMoreElements())
{
String paramName=(String)params.nextElement();
Object obj =request.getParameter(paramName);
if(obj instanceof String){
request.setAttribute(paramName,((String)obj).toUpperCase());}
}
chain.doFilter(request,sresponse);
}
//銷毀過濾器
public void destroy()
{
}
}
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