JAVA Web项目的编码过滤器
首先写一个EncodeFilter的过滤类:
package com.djtu.wy.common;
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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class EncodeFilter implements Filter{
String encoding = null;
FilterConfig filterConfig = null;
public void destroy() {
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) arg0;
HttpServletResponse response = (HttpServletResponse) arg1;
request.setCharacterEncoding(encoding);
response.setContentType("text/html; charset="+encoding);
arg2.doFilter(arg0,arg1);
}
public void init(FilterConfig arg0) throws ServletException {
this.filterConfig = arg0;
this.encoding = arg0.getInitParameter("encoding");
}
}
而后在web.xml文件中进行配置:
<filter>
<filter-name>EncodeFilter</filter-name>
<filter-class>com.djtu.wy.common.EncodeFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodeFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
之后就大功告成啦!
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