将变量分配给HTML中的值 [英] Assign variable to the value in HTML

问题描述

 字符串注册=10-120; 
< input type =textname =registrationUpdatevalue =Reg＃maxlength =50/>< br> 
  

在上面， value =Reg＃这是硬编码。
我想将变量分配给该值。即Means value = registration;

更新我！

解决方案

问题不是很清楚。我会假设变量是在servlet中声明的，因为在JSP中使用Java是不好的做法。为了能够在一个Servlet之间共享一个转发给JSP的变量，你需要将这个变量设置为一个request属性：

 字符串注册=10-120; 
 request.setAttribute（注册，注册）; 
  

然后在JSP中，您可以使用JSP EL获取注册属性的值：

 < input type =textname =registrationUpdatevalue =$ {registration}maxlength =50 /> 
  

您应该阅读Java EE教程： http://docs.oracle.com/javaee/5/tutorial/doc/bnadp.html

String registration="10-120";
<input type="text" name="registrationUpdate" value="Reg#" maxlength="50" /><br>

In the above , value="Reg#" which is hard code. I want to assign variable to the value. i.e. Means value=registration;

update me!

解决方案

Your question is not very clear. I'll assume the variable is declared inside a servlet, because it's bad practice to use Java in a JSP. To be able to share a variable between a Servlet whic forwards to a JSP, you need to set this variable into a request attribute:

String registration = "10-120";
request.setAttribute("registration", registration);

And then in the JSP, you can get the value of the "registration" attribute using the JSP EL:

<input type="text" name="registrationUpdate" value="${registration}" maxlength="50" />

You should read the Java EE tutorial: http://docs.oracle.com/javaee/5/tutorial/doc/bnadp.html

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