filterclass怎么写 _filterclass

1.java过滤器中实现Filter的类怎么写web.xml配置文件
<filter>
<filter-name>SessionFilter</filter-name>
<filter-class>com.qhit.system.tools.SessionFilter</filter-class>
</filter>
<filter-mapping>
【filterclass怎么写】<filter-name>SessionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
java类
public class ConnFilter extends HttpServlet implements Filter {
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterchain) throws IOException, ServletException
{
try
{
filterchain.doFilter(request, response)；此处为过滤链理解为请求通过该过滤继续前行可在此处加上判断如果TRUE执行该语句有过FALSE 则直接跳转其他页面常用于判断是否有权限进入某页面
}
finally
{
DBUtils.close();
}
}
2.filter java 怎么写web.xml配置文件 SessionFilter com.qhit.system.tools.SessionFilter SessionFilter /* java类 public class ConnFilter extends HttpServlet implements Filter { public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterchain) throws IOException, ServletException { try { filterchain.doFilter(request, response)；此处为过滤链理解为请求通过该过滤继续前行可在此处加上判断如果TRUE执行该语句有过FALSE 则直接跳转其他页面常用于判断是否有权限进入某页面 } finally { DBUtils.close(); } } 。
3.java过滤器中实现Filter的类怎么写web.xml配置文件 SessionFilter com.qhit.system.tools.SessionFilter SessionFilter /* java类 public class ConnFilter extends HttpServlet implements Filter { public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterchain) throws IOException, ServletException { try { filterchain.doFilter(request, response)；此处为过滤链理解为请求通过该过滤继续前行可在此处加上判断如果TRUE执行该语句有过FALSE 则直接跳转其他页面常用于判断是否有权限进入某页面 } finally { DBUtils.close(); } } 。
4.web.xml 所有页面都 filter怎么写<filter>
<filter-name>Test Filter</filter-name>
<filter-class>com.yourcompany.filters.TestFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>Test Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
5.web多个filter怎么写应该这么写：
<filter><；！-- 编码问题过滤器配置-->
<display-name>TypeFilter</display-name>
<filter-name>TypeFilter</filter-name>
<filter-class>com.servlet.TypeFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>gb2312</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>TypeFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter><；！--黑名单过滤器配置-->
<display-name>NoteFilter</display-name>
<filter-name>NoteFilter</filter-name>
<filter-class>com.servlet.NoteFilter</filter-class>
<init-param>
<param-name>Blacklist</param-name>
<param-value>；黑名单</param-value>
</init-param>
</filter>