jsp页面静态化例子

package com.htmlstatic;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

public class ToHtml extends HttpServlet {
	private static final String CONTENT_TYPE = "text/html; charset=GBK"; //$NON-NLS-1$

	private static ServletContext sc = null;

	private HttpServletRequest request = null;
	private HttpServletResponse response = null;
	private static String staticHtmlRefreshTime = "1";//刷新间隔时间
	private static String path = "D:\\tomcat5.5\\webapps\\diesel_gdc";//文件生成路径
	private static String url = "/index.jsp";//需要静态化的页面

	
	// Initialize global variables
	public void init() throws ServletException {
	}

	// Process the HTTP Get request
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType(CONTENT_TYPE);
		service(request, response);
	}

	// Process the HTTP Post request
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

	public void destroy() {
	}

	public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType(CONTENT_TYPE);
		long SPACING = 0;
		if (staticHtmlRefreshTime == null) {
			SPACING = 1000 * 60 * 10;
		} else {
			SPACING = 1000 * 60 * Long.parseLong(staticHtmlRefreshTime);
		}

		sc = getServletContext();
		this.request = request;
		this.response = response;
		
		String[] urls = url.split(",");

		List names = new ArrayList();
		for (int i = 0; i < urls.length; i++) {
			String tmp = urls[i].replaceAll(".jsp", ".html");
			names.add(tmp);
		}
		while (true) {
			System.err.println("静态化开始");
			myService(urls, names);
			System.err.println("静态化结束");
			try {
				Thread.currentThread().sleep(SPACING);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	public synchronized void myService(String[] urls, List names) {

		String name = "";
		for (int i = 0; i < urls.length; i++) {
			FileOutputStream fos = null;
			try {
				name = path + names.get(i).toString().replaceAll(".html", ".html");
				RequestDispatcher rd = sc.getRequestDispatcher("/" + urls[i]);
				final ByteArrayOutputStream os = new ByteArrayOutputStream();
				final ServletOutputStream stream = new ServletOutputStream() {
					public void write(byte[] data, int offset, int length) {
						os.write(data, offset, length);
					}

					public void write(int b) throws IOException {
						os.write(b);
					}
				};
				final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os));
				HttpServletResponse rep = new HttpServletResponseWrapper(response) {
					public ServletOutputStream getOutputStream() {
						return stream;
					}

					public PrintWriter getWriter() {
						return pw;
					}
				};

				rd.include(request, rep);
				pw.flush();
				System.out.println("name=="+name);
				
				fos = new FileOutputStream(name);
				// 把jsp输出的内容写到xxx.htm
				os.writeTo(fos);
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			} catch (ServletException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				try {
					fos.close();
				} catch (Exception e) {
				}
			}

		}		
	}

	private void writeFile(String fileName, String content) {
		OutputStreamWriter writer = null;
		try {
			File f = new File(path + "\\" + fileName);
			if (!f.exists()) {
				f.createNewFile();
			}
			writer = new OutputStreamWriter(new FileOutputStream(f), "GBK");
			writer.write(content);
			writer.flush();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				writer.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

 web.xml配置:

 

                 <servlet>
		<servlet-name>tohtml</servlet-name>
		<servlet-class>com.htmlstatic.ToHtml</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>tohtml</servlet-name>
		<url-pattern>*.tohtml</url-pattern>
	</servlet-mapping>

 

评论

3 楼 hll127 2016-07-15  

请问service这个方法里为什么要while(true)啊？

2 楼 wsliupan 2014-07-01  

例子中有中文乱码，请在
final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os));
改成final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os ,"UTF-16"));
就不会乱码了

1 楼 橄榄绿 2010-06-22  

你好。受教了！我也写了一个。但是不知道为什么发到网上生成的时候就显示乱码，在本机里测试没问题。有时间能帮我看看吗？