发布于 2016-08-15 23:15:52 | 243 次阅读 | 评论: 1 | 来源: 网友投递
这里有新鲜出炉的JSP学习教程，程序狗速度看过来！
JSP JAVA公司的WEB开发编程语言
JSP全名为Java Server Pages - java服务器页面是由Sun Microsystems公司倡导、许多公司参与一起建立的一种动态网页技术标准。JSP技术有点类似ASP技术，它是在传统的网页HTML（标准通用标记语言的子集）文件(*.htm,*.html)中插入Java程序段(Scriptlet)和JSP标记(tag)，从而形成JSP文件，后缀名为(*.jsp)。
javascript通过url向jsp页面传递中文参数乱码,一直都是从事jsp开发者比较烦心的是，于是本文介绍了一些解决方法，感兴趣的朋友可以了解下
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>