Struts过滤器的使用,已解决中文问题

最新推荐文章于 2017-12-10 17:26:04 发布

最新推荐文章于 2017-12-10 17:26:04 发布 · 96 阅读

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#Struts #Servlet #Web #XML

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本文介绍了一种通过自定义过滤器解决Web应用中中文乱码问题的方法。通过在web.xml中配置过滤器并实现Filter接口，可以统一设置请求字符集为UTF-8，简化了编码设置，并适用于数据库同样配置为UTF-8的场景。

web.xml

<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>mypack.Charset</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>Set Character Encoding</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>

过滤的类
package mypack;
import java.io.*;
import javax.servlet.*;

public class Charset 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);
}
}
这2个加进工程里，就可以直接运行了。不用在设置什么。
至于数据库最好设置为UTF-8.
从此以后远离中文出现乱码的烦恼。哈哈哈