24,923
社区成员




package com.xzit.common;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
public class EncodingFilter implements Filter {
private static String encoding;
private static final String DEFAULT_CHARSET = "UTF-8";
@Override
public void destroy() {
System.out.println("--------destroy---------");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
if ("GET".equals(httpRequest.getMethod())) {
EncodingHttpServletRequest wrapper = new EncodingHttpServletRequest(httpRequest, encoding);
chain.doFilter(wrapper, response);
} else {
httpRequest.setCharacterEncoding(encoding);
httpResponse.setContentType("text/html;charset=" + encoding);
chain.doFilter(request, response);
}
}
private static class EncodingHttpServletRequest extends HttpServletRequestWrapper {
private HttpServletRequest request;
public EncodingHttpServletRequest(HttpServletRequest request, String encoding) {
super(request);
this.request = request;
}
@Override
public String getParameter(String name) {
String value = request.getParameter(name);
try {
value = new String(value.getBytes("iso8859-1"), encoding);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return super.getParameter(name);
}
}
@Override
public void init(FilterConfig config) throws ServletException {
System.out.println("--------init---------");
encoding = config.getInitParameter("encoding");
if (encoding == null || "".equals(encoding))
encoding = DEFAULT_CHARSET;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>MyProject</display-name>
<filter>
<filter-name>CharacterFilter</filter-name>
<filter-class>com.xzit.common.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterFilter</filter-name>
<!-- 拦截所有的请求,为所有的请求设置编码 -->
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>