每个Servlet都要加请求和响应的编码吗?有没有统一设置方案

Question

每个Servlet都要加这两条语句才不会乱码,一两个倒无所谓,如果几十上百个,就郁闷了...求一个统一的设置方案...小弟刚学JSP
request.setCharacterEncoding("GBK");
response.setContentType("text/html;charset=GBK");

Answer 1

用过滤器,然后在你的web.xml里面设置
<filter>
    <filter-name>过虑器的类</filter-name>
    <filter-class>包路径</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>编码</param-value>
    </init-param>
</filter><filter-mapping>
    <filter-name>XXX</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Answer 2

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 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 {// Conditionally select and set the character encoding to be used
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null) {
request.setCharacterEncoding(encoding);
}
}// Pass control on to the next filter
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) {
this.ignore = true;
} else if (value.equalsIgnoreCase("true")) {
this.ignore = true;
} else if (value.equalsIgnoreCase("yes")) {
this.ignore = true;
} else {
this.ignore = false;
}}protected String selectEncoding(ServletRequest request) {
return (this.encoding);
}}然后在web.xml中配置：<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>epim.base.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GBK</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

Answer 3

szuzsq(兮)的代码跟孙鑫老师的代码一样,不过少了一行代码.呵呵...