启动页面报错是什么原因:java.lang.ClassCastException: chen.wei.EncodingFilter cannot be cast to javax.servlet.Servlet
【xml配置】
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>
chen.wei.EncodingFilter
</filter-class>
<init-param>
<param-name>Encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
【过滤器代码】
package chen.wei;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 EncodingFilter implements Filter {
protected FilterConfig config;
protected String Encoding = null;
public void init(FilterConfig config) throws ServletException {
this.config = config;
this.Encoding = config.getInitParameter("Encoding");
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if (request.getCharacterEncoding() == null) {
if (Encoding != null) {
request.setCharacterEncoding(Encoding);
response.setCharacterEncoding(Encoding);
}
}
chain.doFilter(request,response);
}
public void destroy() {}
}
【jar包】
jre和Java ee6
【xml配置】
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>
chen.wei.EncodingFilter
</filter-class>
<init-param>
<param-name>Encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
【过滤器代码】
package chen.wei;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 EncodingFilter implements Filter {
protected FilterConfig config;
protected String Encoding = null;
public void init(FilterConfig config) throws ServletException {
this.config = config;
this.Encoding = config.getInitParameter("Encoding");
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if (request.getCharacterEncoding() == null) {
if (Encoding != null) {
request.setCharacterEncoding(Encoding);
response.setCharacterEncoding(Encoding);
}
}
chain.doFilter(request,response);
}
public void destroy() {}
}
【jar包】
jre和Java ee6
解决方案 »
- 如何获取某标签中子项个数??
- commons-fileupload-1.2 上传图片表单内同时提交一些用户信息的问题??
- 我发现我挺反感hibernate的,特烦!
- 工作需要,初学Struts,弄了个简单的注册例子都出毛病,郁闷死。大家有空的话帮着看看,谢谢!
- 做类似腾讯相册功能!
- 困惑
- 表格可填写行的增加问题!
- 急!resin+sqlserver2000出错,我估计是resin连接数据库上出错,请各位大哥帮我看看到底是哪错了。谢谢大家
- 编译Serverlet的问题
- 莫名其妙的问题,大虾帮帮忙
- Hibernate如何实现动态的查询
- 现在找工作 都要会ssh框架,怎样才算会用,那位大哥帮我解析一下ssh吧
用的时候转化为HttpServletRequest...