javascript通过url向jsp页面传递中文参数导致乱码解决方案
花生仁的功效,海滩别曲谱,盛夏晚晴天莱雪
2013-1-16 10:35:49 org.apache.tomcat.util.http.parameters processparameters
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：
<%@ 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>
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