package cn.org.ape;
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;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import cn.org.ape.http.HttpRequest;
import cn.org.ape.http.HttpResponse;
import cn.org.ape.http.RequestContext;
import cn.org.ape.http.ResponseContext;
/**
* 主要是要是用于过滤编码 <br>
* 默认的编码是UTF-8<br>
* 同时也可以通过配置文件配置 如：<br>
* <filter><br>
* <filter-name>filter</filter-name><br>
* <filter-class>cn.org.ape.ApeFilter</filter-class><br>
* <init-param><br>
* <param-name>encoding</param-name><br>
* <param-value>UTF-8</param-value><br>
* </init-param><br>
* <br><br>
* </filter><br>
* <br>
* <filter-mapping><br>
* <filter-name>filter</filter-name><br>
* <url-pattern>/*</url-pattern><br>
* </filter-mapping><br>
*
* @author 陈磊
*
*/
@WebFilter(urlPatterns="/servlet/*",
initParams={@WebInitParam(name="encoding",value = "UTF-8")})
public class ApeFilter implements Filter {
private static final Logger log = LoggerFactory.getLogger(ApeFilter.class);
private static final String ENCODING = "encoding";
private static String encoding; //字体编码 默认utf8
@Override
public void destroy() {
// TODO Auto-generated method stub
}
/**
* 该过滤器主要用于request的转码
*/
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain chain) throws IOException, ServletException {
HttpRequest request=new RequestContext((HttpServletRequest) servletRequest);
HttpResponse response = new ResponseContext((HttpServletResponse) servletResponse);
// 主要是修改post方式提交的数据
request.setCharacterEncoding(encoding); //设设置编码
//修改get方式提交的数据
/**
* get方式的修改只有将取得的数据强行转码
* value = new String(value.getBytes("ISO-8859-1"),
* "UTF-8");
*但这里要知道原始的编码格式 如 tomcat 默认的"ISO-8859-1" 但也可以修改成UTF-8
*所以这里不做Get方式的转码
*
*/
chain.doFilter(request, response);
}
/**
* 初始化系统编码 :<p>
* <p><param-name>encoding</param-name>
* <p><param-value>UTF-8</param-value>
* <p></init-param>
* 系统默认的是UTF-8
*/
@Override
public void init(FilterConfig conf) throws ServletException {
encoding=conf.getInitParameter(ENCODING);
if (StringUtils.isEmpty(encoding))
{
encoding="UTF-8";//系统默认使用UTF-8
}
log.debug("系统采用{}编码过滤",encoding);
}
}