[英]send data from select tag to servlet
我有一个简单的选择标签
Job Category:
<select name="jobCat">
<option value="tech">Technology</option>
<option value="admin">Administration</option>
<option value="biology">Biology</option>
<option value="science">Science</option>
</select>
现在,当用户选择一个选项时,我想将数据发送到servlet dopost方法吗?
上面的代码位于abc.jsp中,并且servlet文件的名称为pqr.java。
如何执行以上动作?
我读过类似的东西
<form action="login" method="post">
UserId <input type="text/html" name="userId"/><br><br>
Password <input type="password" name="password"/><br><br>
<input type="submit"/>
</form>
这我映射到登录servlet由
WebServlet("/login")
因此,当用户按下Submit时,数据将发送到该servlet。 现在我想用select语句实现相同的功能?
这是scheduleMeet.jsp文件`<%@页面语言=“ java” contentType =“ text / html; charset = UTF-8” pageEncoding =“ UTF-8”%> <%@ page import =“ important.businessService。 dto.Employee“%>在此处插入标题
</head>
<body>
Job Category:
<form action="scheduleMeet" method="post">
<select name="jobCat">
<option value="tech">Technology</option>
<option value="admin">Administration</option>
<option value="biology">Biology</option>
<option value="science">Science</option>
</select>
</form>
</body>
</html>`
这是ScheduleMeetServlet.java`包的重要组成部分;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class scheduleMeetServlet
*/
@WebServlet("/scheduleMeet")
public class scheduleMeetServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String jobCategory = request.getParameter("jobCat");
System.out.println("Job category is: " + jobCategory);
}
}
`
您可以通过使用选择名称来做到这一点
您的选择必须在表格内
<form action="login" method="post">
<select name="jobCat">
<option value="tech">Technology</option>
<option value="admin">Administration</option>
<option value="biology">Biology</option>
<option value="science">Science</option>
</select>
UserId <input type="text/html" name="userId"/><br><br> Password <input type="password" name="password"/><br><br> <input type="submit"/> </form>
在您的Login servlet中,在servlet post方法中,只需使用request.getparameter来获取该值
eg
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException {
String selectedvalue = request.getparameter("jobCat");
// you will get that value in the string selectedvalue
}
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