jsp中文乱码的Filter过滤器配置

XML code

<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>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Java code

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

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

jsp头文件
HTML code

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

//此处的charset的值要和web.xml里的 <param-value> </param-value>值一样