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How to run jsp in tomcat

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To run JSP, you need to: 1. Configure the Web container (such as Tomcat) to support JSP; 2. Create a JSP file with Java code; 3. Use JSPT to compile JSP; 4. Configure the compiled Servlet Deploy to the Web container; 5. Access the JSP page. For example, configure Tomcat and create a JSP file that outputs "Hello, world!" and then use jspc to compile, deploy to Tomcat, and access the URL http://localhost:8080/your-servlet-mapping/your.jsp.

How to run jsp in tomcat

How to run JSP

JSP (JavaServer Pages) is a technology that embeds Java code into HTML pages , allowing developers to create dynamic Web pages. To run JSP, the following steps are required:

1. Configure the Web container

  • Install a Web container such as Tomcat or GlassFish.
  • Configure the container to support JSP. This usually involves adding a element in the web.xml deployment descriptor.

2. Write a JSP file

  • Create a .jsp file that contains HTML code and embedded Java code.
  • For example:
<code class="html"><%@ page import="java.util.Date" %>
<html>
<body>
    <h1>当前时间:<%= new Date() %></h1>
</body>
</html></code>

3. Compile the JSP file

  • Use the JavaServer Pages Standard Toolkit (JSPT) to compile the JSP file Compiled into Java Servlet.
  • Type the following command in the command line:
<code>jspc path/to/your.jsp</code>

4. Deploy Servlet

  • Deploy the compiled Servlet to in the web container. This usually involves copying the .class file into the container's webapps directory.

5. Access the JSP page

  • Enter the URL of the JSP page in your web browser.
  • For example: http://localhost:8080/your-servlet-mapping/your.jsp

Example:

Assume that you Tomcat has been configured and the following JSP file has been written:

<code class="html"><%@ page import="java.util.Date" %>
<html>
<body>
    <h1>你好,<% out.println("世界"); %>!</h1>
</body>
</html></code>

Follow the steps below to run this JSP:

  1. Use the jspc command to compile the JSP file:
<code>jspc path/to/hello-world.jsp</code>
  1. Deploy the hello-world.class file to the webapps directory of Tomcat.
  2. Open http://localhost:8080/hello-world.jsp in the browser.

The page will display the following:

<code><h1>你好,世界!</h1></code>

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