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htmlconvertjsp

王林

Release： 2023-05-15 17:36:08

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HTML Conversion JSP

As we all know, HTML is a markup language commonly used in web development. JSP, the abbreviation of Java Server Pages, is a dynamic web page programming language in Java. Although both languages are used for web development, there are significant differences between them. In some cases, we need to convert HTML code into JSP code to meet specific needs. This article will introduce how to convert HTML code into JSP code and explore the differences between the two.

I. The difference between HTML and JSP

Before introducing how to convert HTML code into JSP code, we need to first understand the difference between the two. HTML is a sequentially executed markup language mainly used for the design and presentation of static pages. It can only be used to create web pages on the browser side. JSP is a passive Web programming language that can be used to dynamically generate web pages. JSP pages are compiled into Java Servlets on the server side and then transmitted to the client for display.

During the development process, HTML is mainly used for interface design, while JSP is used to respond to client requests, process business logic and generate HTML code. In addition, JSP can use the Java programming language and JavaBean components to implement more complex business logic processing.

II. Convert HTML code to JSP code

In most cases, converting HTML code to JSP code is very easy. We only need to add JSP tags in the HTML code to support JSP. Below is an example of HTML code that we convert into JSP code.

<!DOCTYPE html>
<html>
<head>
    <title>Hello World</title>
</head>
<body>
    <h1>Hello World</h1>
    <p>这是一个简单的HTML页面</p>
    <form action="SubmitServlet" method="post">
        <label>用户名：</label>
        <input type="text" name="username" id="username"/>
        <br/>
        <label>密码：</label>
        <input type="password" name="password" id="password"/>
        <br/>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>

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We need to modify the form part so that it can be applied to JSP. The modified code is as follows:

<form action="<%=request.getContextPath()%>/SubmitServlet" method="post">
    <label>用户名：</label>
    <input type="text" name="username" id="username"/>
    <br/>
    <label>密码：</label>
    <input type="password" name="password" id="password"/>
    <br/>
    <input type="submit" value="提交"/>
</form>

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In this example, we only need to add the <%=request.getContextPath()%> tag to the action attribute of the form, And remove the original relative path to convert the HTML code into JSP code.

III. HTML tags suitable for JSP

In the process of converting HTML code into JSP code, we need to note that some HTML tags are not suitable for JSP. Below are some HTML tags and elements suitable for JSP.

Form tags

Except the action attribute needs to be modified, HTML form tags can be used directly in JSP.

Text boxes and text fields

Text boxes and text fields can be used directly without any modification.

Check boxes and radio buttons

can also be used directly.

Drop-down list box

The drop-down list box can be used directly without modification, but it should be noted that in JSP, we can use EL expressions to dynamically Generate the value of the drop-down list box, which cannot be achieved by HTML.

Hyperlink

Hyperlink can be used directly, but it should be noted that in JSP, we can use EL expressions to extract data or call other Servlets or JSP page to achieve more functions.

IV. Conclusion

HTML and JSP are two different Web programming languages, and they have their own characteristics and advantages. In web development, we can choose the appropriate programming language according to our needs to implement functions that better meet user needs.

This article introduces how to convert HTML to JSP, and also explores the differences between the two languages. I hope that through studying this article, readers can have an in-depth understanding of HTML and JSP and be able to use them skillfully in actual Web development.

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