Web程序的編碼問題主要有三個方面:
- 程序文件的編碼;
- 輸出頁面到客戶端的編碼;
- 用戶響應到服務器端的編碼。
以設置為UTF-8為例,可以用如下方法解決。
1. 對于程序文件的編碼
直接在Eclipse或者其他IDE,editor中將文件編碼設為UTF-8即可。
2.輸出頁面
對于JSP頁面,加入以下代碼
<%@ page contentType="text/html; charset=UTF-8"%>
如果在IE或者Firefox中還不能正常顯示,還可以在Html標識下加入下面的頭信息
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
3. 響應到服務器端
我使用的是Tomcat,沒有可以直接設置接受響應編碼的方法(真是太佩服了!),但可以通過寫一個Filter實現(xiàn)編碼轉(zhuǎn)化。
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 SetCharacterEncodingFilter 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);
}
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);
}
}
將SetCharacterEncodingFilter放到程序的編譯目錄下,再在web.xml中添加相應屬性
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>hijeff.filters.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Tomcat就會將用戶通過HTTP響應的字符轉(zhuǎn)化為UTF-8的編碼了
posted on 2007-03-15 20:58
hijeff 閱讀(307)
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