怎么在服务器(win,linux等)上安装Tomcat后供多个同学使用?不用ftp的简单方式。

原理:

我们知道一般的jsp程序是在wtpwebapps或者webapps文件夹下的,本教程默认在webapps下,而在服务器上的话,需要将jsp程序导出的war包放到webapps文件夹下。然后访问 域名/项目名称/文件 即可访问这个文件。这个程序是一个上传程序,将用户(其他同学好友)的war包直接上传至webapps,然后生成直接访问这个网址的链接。

 闲话少叙,代码整起:

上传代码,没有UI,倒数3-4行为示例可删

upload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>




文件上传


War文件上传

选择一个文件:(务必为.war文件)







如何生成war文件?看下图

 结果界面 返回结果 message.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>





文件上传结果


	

${message}

点击下方链接跳转到你的项目目录

${yoururl}

 UploadServlet

package servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 * Servlet implementation class UploadServlet
 */
@WebServlet("/upload.do")
public class UploadServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	private static final String URL = "http://你的域名/";
	 // 上传文件存储目录
    private static final String UPLOAD_DIRECTORY = "upload";
 
    // 上传配置
    private static final int MEMORY_THRESHOLD   = 1024 * 1024 * 3;  // 3MB
    private static final int MAX_FILE_SIZE      = 1024 * 1024 * 40; // 40MB
    private static final int MAX_REQUEST_SIZE   = 1024 * 1024 * 50; // 50MB    /**
    
    public UploadServlet() {
        super();
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 *    a上传数据及保存文件
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		  // 检测是否为多媒体上传
        if (!ServletFileUpload.isMultipartContent(request)) {
            // 如果不是则停止
            PrintWriter writer = response.getWriter();
            writer.println("Error: 表单必须包含 enctype=multipart/form-data");
            writer.flush();
            return;
        }
        // 配置上传参数
        DiskFileItemFactory factory = new DiskFileItemFactory();
        // 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
        factory.setSizeThreshold(MEMORY_THRESHOLD);
        // 设置临时存储目录
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
 
        ServletFileUpload upload = new ServletFileUpload(factory);
         
        // 设置最大文件上传值
        upload.setFileSizeMax(MAX_FILE_SIZE);
         
        // 设置最大请求值 (包含文件和表单数据)
        upload.setSizeMax(MAX_REQUEST_SIZE);
        
        // 中文处理
        upload.setHeaderEncoding("UTF-8"); 

        // 构造临时路径来存储上传的文件
        // 这个路径相对当前应用的目录
        //String uploadPath = getServletContext().getRealPath("/") + File.separator + UPLOAD_DIRECTORY;
        
        String uploadPath = getServletContext().getRealPath("/");
        File aFile = new File(uploadPath).getParentFile();
        uploadPath = aFile.toString();
        
        // 如果目录不存在则创建
        File uploadDir = new File(uploadPath);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }
 
        try {
            // 解析请求的内容提取文件数据
            @SuppressWarnings("unchecked")
            List formItems = upload.parseRequest(request);
 
            if (formItems != null && formItems.size() > 0) {
                // 迭代表单数据
                for (FileItem item : formItems) {
                    // 处理不在表单中的字段
                    if (!item.isFormField()) {
                        String fileName = new File(item.getName()).getName();
                        String filePath = uploadPath + File.separator + fileName;
                        File storeFile = new File(filePath);
                        // 在控制台输出文件的上传路径
                        System.out.println(filePath);
                        // 保存文件到硬盘
                        item.write(storeFile);
                        request.setAttribute("message",
                            "文件上传成功!");
                        fileName = fileName.substring(0,fileName.indexOf("."));
                        request.setAttribute("yoururl",URL + fileName);
                    }
                }
            }
        } catch (Exception ex) {
            request.setAttribute("message",
                    "错误信息: " + ex.getMessage());
        }
        // 跳转到 message.jsp
        getServletContext().getRequestDispatcher("/admin/message.jsp").forward(
                request, response);
    }

}

代码第21行@WebServlet("../upload.do")需要自行修改,我的这两个jsp在WebContent下的admin文件夹下。

代码第25行    private static final String URL = "xxx";改为自己的域名

 效果:(上传即可访问,有时候需要等几秒,多刷新几次)

怎么在服务器(win,linux等)上安装Tomcat后供多个同学使用?不用ftp的简单方式。_第1张图片

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