BasicServlet

Java Servlet 实例

最新推荐文章于 2025-12-02 22:10:11 发布

原创最新推荐文章于 2025-12-02 22:10:11 发布 · 741 阅读

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#parameters #string #import #servlet #html #action

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照着Java Servlet开发与实例的程序清单4.1和4.2写的。

初学者一定要注意修改项目中web-inf目录下的web.xml文件，添加以下内容，不然会出错

<servlet>
<servlet-name>***</servlet-name>
<servlet-class>包.类名称</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>***</servlet-name>
<url-pattern>/路径名称/**</url-pattern>
</servlet-mapping>

BasicServlet.java

package servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Enumeration;
public class BasicServlet extends HttpServlet{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	public void init(ServletConfig config)
	throws ServletException{
		super.init(config);
	}
	public void doGet(HttpServletRequest request,
			HttpServletResponse response)
	throws ServletException,IOException{
		response.setContentType("text/html");
		PrintWriter out=response.getWriter();
		out.println("<html>");
		out.println("<head><title>BasicServlet</title></head>");
		out.println("<body>");
		out.println("Your request method was "+request.getMethod()+"\n");
		Enumeration parameters=request.getParameterNames();
		String param=null;
		while(parameters.hasMoreElements()){
			param=(String)parameters.nextElement();
			out.println("<b>"+param+":"+request.getParameter(param)+"</b><br>");
		}
		out.println("</body></html>");
		out.close();
	}
	public void doPost(HttpServletRequest request,
			HttpServletResponse response)
	throws ServletException,IOException{
		response.setContentType("text/html");
		PrintWriter out=response.getWriter();
		out.println("<html>");
		out.println("<head><title>BasicServlet</title></head>");
		out.println("<body>");
		out.println("Your request method was "+request.getMethod()+"\n");
		Enumeration parameters=request.getParameterNames();
		String param=null;
		while(parameters.hasMoreElements()){
			param=(String)parameters.nextElement();
			out.println("<b>"+param+":"+request.getParameter(param)+"</b><br>");
		}
		out.println("</body></html>");
		out.close();	
	}
	public String getServlerInfo(){
		return "BasicServlet Information";
	}


}

Form.html

<html>
<head>
<title>Form</title>
</head>
<body>
<form action=http://localhost:8080/BasicServlet/servlet.BasicServlet method=POST>
<table style="height:173px; width:300px">
<tr>
<td>Last Name:</td>
<td><input type=text name="LastName" align="left" size="15"></td>
</tr>
<tr>
<td>First Name:</td>
<td><input type=text name="FirstName" align=left size=15> </td>
</tr>
<tr>
<td>SSN:</td>
<td><input type=text align=left name=SSN size=11> </td>
</tr>
<tr>
<td>DOB:</td>
<td><input type=text align=left name=DOB size=8> </td>
</tr>
<tr>
<td>Username:</td>
<td><input type=text align=left name=Username> </td>
</tr>
<tr>
<td>Password:</td>
<td><input type=password align=left name=Password size=8> </td>
</tr>
</table>
<input type="submit" name="Submit" value="Submit">
<input type="reset" value="Reset">
</form>
</body>
</html>