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1.Ϊ³ÌÐò±àдһ¸ö×Ö·û´®´¦Àíº¯Êý£¬ÓÃÒ»¸ö¾²Ì¬Îļþ±£´æ£¬ÔÚÐèÒª´¦ÀíÖÐÎÄ×Ö·ûµÄJSPÒ³ÃæÖаüº¬Ëü£¬
<%!
 public String codeToString(String str)
 {
  String s=str;
  try
  {
   byte temp[]=s.getBytes("ISO-8859-1");
   s=new String(temp);
   return s;
   }
   catch(Exception e)
   {
    return s;
   }
  }
%>
Ҫת»»Ê±Ö»Ð裺coedeToString(request.getParameter(..));¾Í¿ÉÒÔÁË£¬ºÜºÃÓõġ£
2.Ò»ÖÖÆÕ±éÊÊÓõķ½·¨£¬¼ÓÒ»¸ö¹ýÂËÆ÷£¬Ö®ºó¾Í¿ÉÒÔ¹ýÉÏÒ»ÀÍÓÀÒݵÄÈÕ×ÓÁË¡£
 package filters;
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.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class TomcatFormFilter implements Filter {
/**
* Request.java
* ¶Ô HttpServletRequestWrapper ½øÐÐÀ©³ä, ²»Ó°ÏìÔ­À´µÄ¹¦Äܲ¢ÄÜÌṩËù
ÓÐµÄ HttpServletRequest
* ½Ó¿ÚÖеŦÄÜ. Ëü¿ÉÒÔͳһµÄ¶Ô Tomcat ĬÈÏÉèÖÃϵÄÖÐÎÄÎÊÌâ½øÐнâ¾ö¶øÖ»
ÐèÒªÓÃÐ嵀 Request ¶ÔÏóÌæ»»Ò³ÃæÖеÄ
* request ¶ÔÏó¼´¿É.
*/
class Request extends HttpServletRequestWrapper
{
public Request(HttpServletRequest request) {
super(request);
}
/**
* ת»»ÓÉ±íµ¥¶ÁÈ¡µÄÊý¾ÝµÄÄÚÂë.
* ´Ó ISO ×Ö·ûתµ½ GBK.
*/
public String toChi(String input) {
try {
byte[] bytes = input.getBytes("ISO8859-1");
return new String(bytes, "GBK");
}
catch (Exception ex) {
}
return null;
}
/**
* Return the HttpServletRequest holded by this object.
*/
private HttpServletRequest getHttpServletRequest()
{
return (HttpServletRequest)super.getRequest();
}
/**
* ¶ÁÈ¡²ÎÊý -- ÐÞÕýÁËÖÐÎÄÎÊÌâ.
*/
public String getParameter(String n


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String sql= "select * from users where username=? and password=?;
PreparedStatement preState = conn.prepareStatement(sql);
preState.setString(1, userName);
preState.setString(2, password);
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JSPÖÐorg.apache.jasper.JasperException

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<input   type="hidden" id="serviceIp"   name="serviceIp"   value="<%=InetAddress.getLocalHost().getHostAddress()%>">
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function getServiceIP(){
var ser ......

jsp Servlet½Å±¾ÔªËØ¡¢Ö¸ÁîºÍÔ¤¶¨Òå±äÁ¿

12.1 JSP½Å±¾ÔªËØ
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±í´ïʽ¸ñʽ£¼%= expression %£¾£º¼ÆËã±í´ïʽ²¢Êä³öÆä½á¹û¡£
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1 £©Ê×ÏȽ¨Á¢¹ÜÀíÓû§±í£¬ÆäÖÐ UserPopedom ¼Ç¼Óû§µÄȨÏÞ×Ö·û£¬ÆäʵҲ¾ÍÊÇһЩ JSP »òÕß ACTION µÄÎļþÃû£º
CREATE TABLE [dbo].[AdminUser] (
  [UserID] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
  [UserName] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
  [UserPass] [varchar ......
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