表单提交步骤

花狗Fdog

发布于 2021-01-06 10:42:36

1.5K0

发布于 2021-01-06 10:42:36

文章被收录于专栏：花狗在Qt

1.项目名称exam，先创建javaweb，然后创建一个包：tzzy1902320136 2.创建一个表格

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>

<fieldset>
<legend>不同方式获取表单数据（中文参数）</legend>
<form action="/exam/Formservlet" >
我是:
<input type="text" name="username"><br/><br />
<input type="submit" name="get" value="通过get方式提交" formmethod="get">
<input type="submit" name="post" value="通过post方式提交" formmethod="post"><br/>
</form>
</fieldset>
</body>
</html>

然后在包下面创建一个servlet 名为Formservlet的类

package tzzy1902320136;

import java.io.IOException;
import java.io.PrintWriter;

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

/**
 * Servlet implementation class Formservlet
 */
public class Formservlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public Formservlet() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.setCharacterEncoding("utf-8");
		
		String username = request.getParameter("username");
		username = new String(username.getBytes("iso-8859-1"),"UTF-8");

		String data1 = request.getParameter("get");
		String data2 = request.getParameter("username");
		PrintWriter out = response.getWriter();
		out.write(data1+data2);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
        request.setCharacterEncoding("UTF-8");//客户端网页控制为UTF-8
        response.setCharacterEncoding("UTF-8");//通知浏览器以何种码表打开
        response.setContentType("text/html;charset=UTF-8");
		String data1 = request.getParameter("post");
		String data2 = request.getParameter("username");
		PrintWriter out = response.getWriter();
		out.write(data1+data2);
	}
}

然后web.xml就会自动添加下面代码：

  <servlet>
    <description></description>
    <display-name>Formservlet</display-name>
    <servlet-name>Formservlet</servlet-name>
    <servlet-class>tzzy1902320136.Formservlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Formservlet</servlet-name>
    <url-pattern>/Formservlet</url-pattern>
  </servlet-mapping>

到这一步后，Formservlet.java 会报错，提示缺少包，然后进官网下载tomcat7（点击下载）

下载好之后，项目右键，Build Pash

选择刚才下好的tomcat7.0文件下面lib路径下的servlet-api。

之后再添加Servers

 int hang = Integer.parseInt(request.getParameter(“hang”));
 int lie = Integer.parseInt(request.getParameter(“lie”));
 PrintWriter out =response.getWriter();
 String str ="<table norder=“1”>";
 out.write(str);
 for(int i = 0;i<hang;i++){
 for(int j = 0;j<lie;j++){
 //生成随机数
 Random r = new Random(1);
 int ran1 = r.nextInt(100);
 String rundstr=""+“ds”+"
";
 out.write(rundstr);
 }
 }
 String str2 = “”;
 out.write(str2);

package tzzy1902320136;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;

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


public class Formnumber extends HttpServlet {
	private static final long serialVersionUID = 1L;

    public Formnumber() {
        // TODO Auto-generated constructor stub
    }

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String hang = request.getParameter("hang");
		String lie = request.getParameter("lie");
		PrintWriter  out =response.getWriter();
		out.write(hang+lie);
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) 
			throws ServletException, IOException {
		int hang = Integer.parseInt(request.getParameter("hang"));
		int lie = Integer.parseInt(request.getParameter("lie"));
		PrintWriter  out =response.getWriter();
		out.write("<table border=\"1\">");
		Random r = new Random(1);
		for(int i = 0;i<hang;i++){
			out.write("<tr>");
			for(int j = 0;j<lie;j++){
				//生成随机数
				String rundstr="<td>"+String.valueOf(r.nextInt(100))+"</td>";
				out.write(rundstr);
			}
			out.write("</tr>");
		}
		out.write("</table>");
	}

}

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="java.util.Random"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
<form>
请输入行数:<input type="text" name = "hang"><br/>
请输入列数:<input type="text" name = "lie"><br/>
<input type="submit" value="提交">
</form>
<%
int row=0;
int col=0;
try{
row=Integer.parseInt(request.getParameter("hang"));
col=Integer.parseInt(request.getParameter("lie"));
}catch(Exception ex){
out.println("please input integer!");
return;
}
int val=1;
Random r = new Random(1);
int ran1 = r.nextInt(100);
%>
<table border="1">

<%for(int i=0;i<row;i++){ %>
<tr>
<%for(int j=0;j<col;j++){ %>

<td>
<%ran1 = r.nextInt(100);%>
</td>

<%} %>
</tr>
<%} %>

</table>
</body>
</html>

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原始发表：2021/01/04 ，如有侵权请联系 cloudcommunity@tencent.com 删除

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