encoding

iteye_12952

于 2012-01-09 13:51:47 发布

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分类专栏： project 文章标签： encoding

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本文深入探讨了编码过滤器的实现细节，包括字符编码的选择与设置过程，以及初始化参数的解析。通过实例代码，详细阐述了如何在Servlet请求响应中应用编码过滤器，确保跨语言环境的字符编码一致性。

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public class EncondFilter implements Filter {

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);

}

}