Huong Dan Java - Page 63 of 77 - Java development tutorials

Learn about namespaces in XML

If you, who have ever worked on XML files, are more or less aware of the namespace concept in XML. Let me give you the following example to give you a first look at it:

<?xml version="1.0" encoding="UTF-8"?>
<classes xmlns:c1="https://huongdanjava.com/class1" xmlns:c2="https://huongdanjava.com/class2">
    <c1:class>
        <c1:students>
            <c1:student>
                <c1:name>Khanh</c1:name>
                <c1:address>123</c1:address>
            </c1:student>
            <c1:student>
                <c1:name>Quan</c1:name>
                <c1:address>456</c1:address>
            </c1:student>
        </c1:students>
    </c1:class>
    <c2:class>
        <c2:students>
            <c2:student>
                <c2:name>Khanh</c2:name>
                <c2:address>789</c2:address>
            </c2:student>
            <c2:student>
                <c2:name>Duy</c2:name>
                <c2:address>234</c2:address>
            </c2:student>
        </c2:students>
    </c2:class>
</classes>

<?xml version="1.0" encoding="UTF-8"?>

<c1:class>

<c1:students>

<c1:student>

<c1:name>Khanh</c1:name>

<c1:address>123</c1:address>

</c1:student>

<c1:student>

<c1:name>Quan</c1:name>

<c1:address>456</c1:address>

</c1:student>

</c1:students>

</c1:class>

<c2:class>

<c2:students>

<c2:student>

<c2:name>Khanh</c2:name>

<c2:address>789</c2:address>

</c2:student>

<c2:student>

<c2:name>Duy</c2:name>

<c2:address>234</c2:address>

</c2:student>

</c2:students>

</c2:class>

</classes>

Declaring xmlns:c1=”https://huongdanjava.com/class1″ or xmlns:c2=”https://huongdanjava.com/class2″ then the xmlns:c1 or xmlns:c2… Read More

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Create and use HTTP Client connection pool

8 years ago by Khanh NguyenApache HTTP Components

What is the HTTP client? For example, if you want to access a website, you are a client. You type the URL of the website into the browser, and you get the content of that website in the browser. Most websites use the HTTP protocol,… Read More

Connect SFTP server using JSch

8 years ago by Khanh NguyenJSch

JSch is a Java library implementing SSH2 protocol, which allows us to connect and manipulate files on an SFTP server. In this tutorial, I will guide you all how to connect to an SFTP server using this library. First, I will create a Maven project as… Read More

Convert InputStream to ByteArray using Apache Commons IO

8 years ago by Khanh NguyenApache Commons IO

In this tutorial, I will guide you to convert from InputStream to ByteArray using Apache Commons IO library. In the Apache Commons IO library, there is a class called IOUtils. It contains three methods that allow us to easily convert from InputStream to ByteArray. That… Read More