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解决JSP页面传参乱码的问题

2009-08-02 09:49 393 查看
写两个JSP页面

1.1.jsp 代码如下

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>

<body>

<form action="2.jsp" method="get">
用户名:<input type="text" name="username"><br>
密 码:<input type="password" name="password"><br>
<input type="submit" value="注册">

</form>

</body>
</html>

2. 2.jsp代码如下

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

</head>

<%String name = new String(request.getParameter("username").getBytes("iso-8859-1"),"gbk");
String password = request.getParameter("password");
%>
<body>
<h1>你的注册信息是</h1>
<p>
用户名:<%=name %><br>
密 码<%=password %>

</body>
</html>

如果你要从一页面传过来的中文不是乱码的话,

String name = new String(request.getParameter("username").getBytes("iso-8859-1"),"gbk");
这样的接受参数的方法是一个通用的方法,不管是对get或post提交的方法都有效

象request.setCharacterEncoding("gbk");只能对post提交的方法管用

第二种方法就是写一个过滤器

Xml代码

<filter>

<filter-name>encoding</filter-name>

<filter-class>

filter.FilterEncoding

</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>gbk</param-value>

</init-param>

</filter>

<filter>
<filter-name>encoding</filter-name>
<filter-class>
filter.FilterEncoding
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>gbk</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>set character encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


Java代码

package filter;

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;

public class FilterEncoding implements Filter

{

protected String encoding; // 接收字符编码

protected boolean ignore; // 是否忽略大小写

protected FilterConfig filterConfig; // 初始化配置

public void init(FilterConfig filterConfig) throws ServletException

{

// 从web.xml文件中读取encoding的值

encoding = filterConfig.getInitParameter("encoding");

// 从web.xml文件中读取ignore的值

String value = filterConfig.getInitParameter("ignore");

// 以下三种情况均为忽略大小写

if(value == null)

{

ignore = true;

}

else if(value.equalsIgnoreCase("yes"))

{

ignore = true;

}

else if(value.equalsIgnoreCase("true"))

{

ignore = true;

}

}

// doFilter方法

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException

{

if(ignore || request.getCharacterEncoding() == null)

{

// 如果为空先从web.xml中得到

String encoding = selectEncoding(request);

if(encoding != null)

{

// 设置字符集编码

request.setCharacterEncoding(encoding);

}

}

// 继续执行

chain.doFilter(request, response);

}

// 得到字符编码

private String selectEncoding(ServletRequest request)

{

return encoding;

}

public void destroy()

{

}

}

package filter;

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;
public class FilterEncoding implements Filter
{
protected String encoding;          // 接收字符编码
protected boolean ignore;            // 是否忽略大小写
protected FilterConfig filterConfig; // 初始化配置

public void init(FilterConfig filterConfig) throws ServletException
{
// 从web.xml文件中读取encoding的值
encoding = filterConfig.getInitParameter("encoding");
// 从web.xml文件中读取ignore的值
String value = filterConfig.getInitParameter("ignore");
// 以下三种情况均为忽略大小写
if(value == null)
{
ignore = true;
}
else if(value.equalsIgnoreCase("yes"))
{
ignore = true;
}
else if(value.equalsIgnoreCase("true"))
{
ignore = true;
}
}
// doFilter方法
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
if(ignore || request.getCharacterEncoding() == null)
{
// 如果为空先从web.xml中得到
String encoding = selectEncoding(request);
if(encoding != null)
{
// 设置字符集编码
request.setCharacterEncoding(encoding);
}
}
// 继续执行
chain.doFilter(request, response);
}
// 得到字符编码
private String selectEncoding(ServletRequest request)
{
return encoding;
}
public void destroy()
{

}
}


如果是url的get提交参数带中文的
可以改下面这个文件，加入一个URIEncoding="GBK"
X:/Tomcat 5.5/conf/Server.xml

Xml代码

<Connector

port="8080"

redirectPort="8443"

minSpareThreads="25"

connectionTimeout="30"

maxThreads="150"

maxSpareThreads="75"

URIEncoding="GBK">

<Connector
port="8080"
redirectPort="8443"
minSpareThreads="25"
connectionTimeout="30"
maxThreads="150"
maxSpareThreads="75"
URIEncoding="GBK">


jsp头文件

Html代码

<%@ page contentType="text/html;charset=
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