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• DispatcherServlet.java

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com.j2mvc.framework.dispatcher.DispatcherServlet Maven / Gradle / Ivy

package com.j2mvc.framework.dispatcher;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import com.j2mvc.framework.Session;
import com.j2mvc.framework.action.ActionBean;
import com.j2mvc.framework.action.ActionMatch;
import com.j2mvc.framework.interceptor.Interceptor;
import com.j2mvc.framework.mapping.RequestMethod;

/**
 * 调配Servlet
 * 
 * 2014-2-23 创建@杨朔
 */
public class DispatcherServlet extends HttpServlet {
	private static final long serialVersionUID = 4351854781111498245L;
	static final Logger  log = Logger.getLogger(DispatcherServlet.class);

	private static final String METHOD_GET = "GET";;
	private static final String METHOD_POST = "POST";

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

		req.setCharacterEncoding(Session.encoding);
		resp.setContentType("text/html;charset=" + Session.encoding);
		resp.setCharacterEncoding(Session.encoding);
		
		String method = req.getMethod();

		String uri = req.getRequestURI();
		String contextPath = req.getContextPath();
		if ("/".equals(contextPath)) {
			contextPath = "";
		}
		uri = !contextPath.equals("") && uri.startsWith(contextPath) ? uri.substring(contextPath.length(), uri.length())
				: uri;
		if (uri.endsWith("/")) {
			uri = uri.substring(0, uri.lastIndexOf("/"));
		} else {
			uri = uri.substring(0, uri.lastIndexOf("."));
		}
		ActionBean bean = new ActionMatch(uri).getBean();
		/** 执行拦截器 */
		Interceptor dispatcherInterceptor = new Interceptor(req, resp,bean);
		boolean success = dispatcherInterceptor.isSuccess();
		if (success) {
			if (bean != null) {
				String requestMethod = bean.getRequestMethod();
				requestMethod = requestMethod!=null?requestMethod:"";
				if (method.equals(METHOD_GET) && 
						(requestMethod.equalsIgnoreCase(RequestMethod.GET)||
								requestMethod.equals(""))) {
					doAction(req, resp,bean);
				} else if (method.equals(METHOD_POST) && 
						(requestMethod.equalsIgnoreCase(RequestMethod.POST)||
								requestMethod.equals(""))) {
					doAction(req, resp,bean);
				}  else {
					log.warn("服务器限制了请求模式，客户端请求方式是GET或POST,与服务器requestMothod不一致.");
					super.service(req, resp);
				}
			}else{
				String queryString = req.getQueryString();
				if(Session.uriLog)
					log.warn("正在访问>>" + uri +(queryString!=null&&!queryString.equals("")?"?"+queryString:"")+ ",未找到映射."
							+ "如果配置uri为正则表达式,请检是否正确,"
							+ "如果配置正确,请检查uri是否正确,例如是否漏了工程路径.");
				super.service(req, resp);
			}
		}
	}
	/**
	 * 执行Actions
	 * 
	 * @param request
	 * @param response
	 * @param bean
	 */
	public void doAction(HttpServletRequest request, HttpServletResponse response,ActionBean bean)
			throws IOException, ServletException {
		/** 执行Action */
		new DispatcherForward(request, response, bean);
	}
}