Filter过滤中文乱码

最新推荐文章于 2024-02-20 13:42:29 发布

转载最新推荐文章于 2024-02-20 13:42:29 发布 · 402 阅读

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本文介绍了如何在Web应用中使用字符编码过滤器来确保网页内容正确显示，包括修改web.xml文件加入配置文件、实现自定义过滤器类及初始化参数设置。

1.修改web.xml，加入配置文件
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

2.Filter类
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 CharacterEncodingFilter implements Filter {

protected String encoding = null;

protected FilterConfig filterConfig = null;
public void destroy() {
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if (null ==request.getCharacterEncoding()) {
String encoding = this.encoding;
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");
}
}

转自：http://blog.sina.com.cn/s/blog_57557b3501017t1k.html