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警告: Parameters: Character decoding failed. Parameter 'id' with value '%u8BA2%u5355' has been ignored. Note that the name and value quoted here may corrupted due to the failed decoding. Use debug level logging to see the original, non-corrupted values.
Enter Servlet Get Method..
OK：
2013-1-16 10:35:49 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet suggest threw exception
Java.lang.NullPointerException
at com.ont.demo.suggest.doGet(suggest.Java:25)
at Javax.servlet.http.HttpServlet.service(HttpServlet.Java:617)
at Javax.servlet.http.HttpServlet.service(HttpServlet.Java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.Java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.Java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.Java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.Java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.Java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.Java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.Java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.Java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.Java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.Java:588)
at org.apache.tomcat.util.NET.JIoEndpoint$Worker.run(JIoEndpoint.Java:489)
at Java.lang.Thread.run(Thread.Java:619)
解决方法：在传递参数前将中文参数进行两次编码，jsp页面获取参数后对中文参数进行一次解码，中文参数就不会变为乱码了！
参考例子：
复制代码 代码如下:
<%@ page language="Java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="Java.NET.*" %>
<%
String str0="";
String str1="";
if(request.getParameter("param0")!=null){
str0=request.getParameter("param0");//直接获取中文参数
}
try{
if(request.getParameter("param1")!=null){
str1=URLDecoder.decode(request.getParameter("param1"),"utf-8");//对中文参数进行解码
}
}catch(Exception e){
e.printStackTrace();
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/Javascript">
var str="你好";
function test0(){
window.location="Test.jsp?param0="+str;//直接传递中文参数
}
function test1(){
window.location="Test.jsp?param1="+encodeURI(encodeURI(str));//对中文参数进行双层编码后再传递
}
</script>
</head>
<body>
<input value=<%=str0 %>>
<input type="button" value="乱码" onclick="test0()"><br>
<input value=<%=str1 %>>
<input type="button" value="正常" onclick="test1()">
</body>
</html>
jsp技术：javascript通过url向jsp页面传递中文参数导致乱码解决方案，转载需保留来源！
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