求一个过滤器过滤乱码的代码

Question

不是吧，过滤器是过滤请求的不分什么GET/POST.网上有的是。

Answer 1

一般的过滤乱码只能过滤post方法请求的乱码你为何这么说呢？

Answer 2

对于 get：
  request.setCharacterEncoding("UTF-8");对于post:
  则要用Map集合拿到所以请求的资源，
  让后进行Iterator迭代

Answer 3

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 boolean ignore = true; protected FilterConfig config; protected String targetEncoding = "UTF-8"; public void init(FilterConfig config) throws ServletException { this.config = config;
this.targetEncoding = config.getInitParameter("encoding");
String value = config.getInitParameter("ignore"); if (value == null)
this.ignore = true;
else if (value.equalsIgnoreCase("true"))
this.ignore = true;
else if (value.equalsIgnoreCase("yes"))
this.ignore = true;
else
this.ignore = false;
} public void destroy() {
config = null;
targetEncoding = null;
} public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException { if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
} chain.doFilter(request, response);
} protected String selectEncoding(ServletRequest request) { return (this.targetEncoding);
}
}在web.xml 里配置
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>cn.usj.gyj.common.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>