处理提交表单或servlet的定向时经常出现乱码。下面是用filter处理。
在web.xml中加入：
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>web.SetCharacterEncodingFilter</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>
对应的java代码：
/**
* <p>Title: test and study</p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: sdzs</p>
* @author meconsea
* @version 1.0
*/
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;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SetCharacterEncodingFilter implements Filter{
public SetCharacterEncodingFilter() {
}
protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;
public void destroy(){
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws IOException,ServletException{
if(ignore || request.getCharacterEncoding() == null){
encoding = selectEncoding(request);
if(encoding != null){
request.setCharacterEncoding(encoding);
}
}
chain.doFilter(request,response);
}
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if(value == null){
ignore = true;
} else if(value.equalsIgnoreCase("true")){
ignore = true;
} else if(value.equalsIgnoreCase("yes")){
ignore = true;
} else{
ignore = false;
}
}
protected String selectEncoding(ServletRequest request){
return this.encoding;
}
}
在jsp页面上加入:
<%@ page contentType="text/html; charset=gbk" %>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gbk">
ok了，关于filter的问题，可以参考servlet的内容。