JAVA:Filter编码器

王朝java/jsp·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

〔CharacterEncodingHttpServletRequestWrapper.java〕

package creator.common.filter;

import javax.servlet.http.*;

public class CharacterEncodingHttpServletRequestWrapper extends HttpServletRequestWrapper {

private String ecoding = null;

private String oldEncoding = null;

public CharacterEncodingHttpServletRequestWrapper(HttpServletRequest request,String encoding) {

super(request);

this.ecoding = encoding;

this.oldEncoding = request.getCharacterEncoding();

}

public String getParameter(String value) {

try{

if((oldEncoding == null || isIOS88591(oldEncoding)) && super.getParameter(value)!=null){

return new String(super.getParameter(value).getBytes("iso-8859-1"),ecoding);

}

else{

return super.getParameter(value);

}

}

catch(Exception e){

e.printStackTrace();

return null;

}

}

private boolean isIOS88591(String endcoding){

endcoding = endcoding.toLowerCase();

return endcoding.startsWith("iso")&& (endcoding.indexOf("8859") != -1) && endcoding.endsWith("1");

}

}

〔CharacterEncodingHttpServletResponseWrapper.java〕

package creator.common.filter;

import javax.servlet.http.*;

public class CharacterEncodingHttpServletResponseWrapper extends HttpServletResponseWrapper {

private String ecoding = null;

public CharacterEncodingHttpServletResponseWrapper(HttpServletResponse response,String encoding) {

super(response);

this.ecoding = encoding;

}

/* (non-Javadoc)

* @see javax.servlet.ServletResponse#setContentType(java.lang.String)

*/

public void setContentType(String value) {

super.setContentType("text/html;charset="+ecoding);

}

}

〔CharsetEncodingFilter.java〕

package creator.common.filter;

import java.io.IOException;

import javax.servlet.*;

import javax.servlet.http.*;

public class CharsetEncodingFilter implements Filter {

private FilterConfig config = null;

private String RequestEncoding = null;

private String ResponseEncoding = null;

public void init(FilterConfig arg0) throws ServletException {

this.config = arg0;

this.RequestEncoding = config.getInitParameter("RequestEncoding");

this.ResponseEncoding = config.getInitParameter("ResponseEncoding");

}

/* (non-Javadoc)

* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)

*/

public void doFilter(ServletRequest req, ServletResponse res, FilterChain fc)

throws IOException, ServletException {

if(this.config == null){

return;

}

HttpServletRequest request = (HttpServletRequest)req;

HttpServletResponse response = (HttpServletResponse)res;

CharacterEncodingHttpServletRequestWrapper mrequestw = new CharacterEncodingHttpServletRequestWrapper(request,ResponseEncoding);

CharacterEncodingHttpServletResponseWrapper wresponsew = new CharacterEncodingHttpServletResponseWrapper(response,ResponseEncoding);

fc.doFilter(mrequestw,wresponsew);

}

public void destroy() {

}

}

〔web.xml〕

<filter>

<filter-name>CharsetEncoding</filter-name>

<filter-class>javabean.com.CharsetEncodingFilter</filter-class>

<init-param>

<param-name>RequestEncoding</param-name>

<param-value>iso-8859-1</param-value>

</init-param>

<init-param>

<param-name>ResponseEncoding</param-name>

<param-value>gb2312</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>CharsetEncoding</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

 
 
 
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