我有这段代码:
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
logger.info("Filter start...");
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
String ba = getBaId(getBody(httpRequest));
if (ba == null) {
logger.error("Wrong XML");
httpResponse.setStatus(HttpServletResponse.SC_BAD_REQUEST);
} else {
if (!clients.containsKey(ba)) {
clients.put(ba, 1);
logger.info("Client map : init...");
} else {
clients.put(ba, clients.get(ba).intValue() + 1);
logger.info("Threads for " + ba + " = " + clients.get(ba).toString());
}
chain.doFilter(request, response);
}
}
另外这个 web.xml 文件(包名已缩短,名称已更改,但看起来相同)。
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app>
<filter>
<filter-name>TestFilter</filter-name>
<filter-class>pkg.TestFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>TestFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>Name</servlet-name>
<display-name>Name</display-name>
<servlet-class>pkg.Name</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Name</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
</web-app>
我希望在过滤器后调用Servlet。我希望使用
chain.doFilter(...)
可以解决问题,但是每次都会在chain.doFilter(...)
这一行出现错误:java.lang.IllegalStateException: getInputStream() can't be called after getReader()
at com.caucho.server.connection.AbstractHttpRequest.getInputStream(AbstractHttpRequest.java:1933)
at org.apache.cxf.transport.http.AbstractHTTPDestination.setupMessage(AbstractHTTPDestination.java:249)
at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:82)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:283)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:166)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:174)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.doPost(AbstractCXFServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:153)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
at pkg.TestFilter.doFilter(TestFilter.java:102)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
at java.lang.Thread.run(Thread.java:619)
chain.doFilter()
的过滤器也可以工作。 - user219882