charsetfilter.java

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package com.easyjf.web; 

import javax.servlet.*;
import java.io.IOException; 
/**
*
* <p>Title:字符转换及过滤类</p>
* <p>Description: * 字符转换，EasyJWeb主要使用utf-8格式的模板，模板中有非英文字符，请使用字符过虑功能
 * 需要在Web.xml文件中设置，设置形式如下：
 * <filter>
 * <filter-name>CharsetFilter</filter-name>
 * <filter-class>com.easyjf.web.CharsetFilter</filter-class>
 * <init-param>
 * <param-name>encoding</param-name>
 * <param-value>utf-8</param-value>
 * </init-param>
 * <init-param>
 * <param-name>ignore</param-name>
 * <param-value>true</param-value>
 * </init-param>
 * </filter>
 * <filter-mapping>
 * <filter-name>CharsetFilter</filter-name>
 * <servlet-name>easyjf</servlet-name>
 * </filter-mapping>	
* <p>Copyright: Copyright (c) 2006</p>
* <p>Company: www.easyjf.com</p>
* @author 蔡世友
* @version 1.0
*/

public class CharsetFilter 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 { 
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}
//System.out.println("执行编码转换！"+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)
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); 
} 
}