1.路径问题：
注意 .代表执行程序的文件夹路径，在tomcat中也就是bin目录，所以要用this.getServletContext().getRealPath("/WEB-INF/classes/db.properties");得到绝对路径；
代码练习：
package com.http.path;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class PathDemo extends HttpServlet {
public PathDemo() {
super();
}
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
request.setCharacterEncoding("utf-8");
//给服务器使用的： / 表示在当前web应用的根目录（webRoot下）
//request.getRequestDispatcher("/target.html").forward(request, response);
//给浏览器使用的： / 表示在webapps的根目录下
//response.sendRedirect("/MyWeb/target.html");
String path = this.getServletContext().getRealPath("/WEB-INF/classes/db.properties");
//this.getServletContext().getResourceAsStream("/WEB-INF/classes/db.properties");
System.out.println(path);
Properties properties = new Properties();
properties.load(new FileInputStream(new File(path)));
String user = properties.getProperty("user");
String passwd = properties.getProperty("passwd");
System.out.println("user = " + user + "\npasswd = " + passwd);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
public void init() throws ServletException {
// Put your code here
}
}
时间： 2024-10-09 12:53:25