Java String to InputStream

以你之姓@ 2023-02-28 06:17 12阅读 0赞

Today we will look into how to convert String to InputStream in java. Recently I wrote a post to convert [InputStream to String][].

今天，我们将研究如何在Java中将String转换为InputStream。 最近，我写了一篇文章将[InputStream][InputStream to String]转换[为String][InputStream to String] 。

## Java String to InputStream **(****Java String to InputStream****)** ##

[![Java String to InputStream, convert String to InputStream in java][Java String to InputStream_ convert String to InputStream in java]][Java String to InputStream_ convert String to InputStream in java_Java String to InputStream_ convert String to InputStream in java]

There are two ways that I have used to convert String to InputStream.

我曾经用两种方法将String转换为InputStream。

1.  Java IO [ByteArrayInputStream][] class
    
    Java IO [ByteArrayInputStream][]类
2.  Apache Commons IO IOUtils class
    
    Apache Commons IO IOUtils类

Let’s have a look at example program to use these classes.

让我们看一下使用这些类的示例程序。

### 使用ByteArrayInputStream将Java字符串转换为InputStream **(****Java String to InputStream using ByteArrayInputStream****)** ###

import java.io.BufferedReader;
    import java.io.ByteArrayInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.nio.charset.Charset;
    
    public class StringToInputStreamUsingByteArrayInputStream {
    
    	public static void main(String[] args) throws IOException {
    		String str = "convert String to Input Stream Example using ByteArrayInputStream";
    
    		// convert using ByteArrayInputStream
    		InputStream is = new ByteArrayInputStream(str.getBytes(Charset.forName("UTF-8")));
    
    		// print it to console
    		BufferedReader br = new BufferedReader(new InputStreamReader(is));
    
    		String line = br.readLine();
    
    		while (line != null) {
    			System.out.println(line);
    			line = br.readLine();
    		}
    	}
    
    }

### 使用Apache Commons IOUtils将字符串转换为InputStream **(****String to InputStream using Apache Commons IOUtils****)** ###

import java.io.IOException;
    import java.io.InputStream;
    import java.nio.charset.Charset;
    
    import org.apache.commons.io.IOUtils;
    
    public class StringToInputStreamUsingIOUtils {
    
    	public static void main(String[] args) throws IOException {
    		String str = "Example using Apache Commons IO class IOUtils";
    
    		InputStream stream = IOUtils.toInputStream(str, Charset.forName("UTF-8"));
    
    		stream.close();
    	}
    
    }

You can use `IOUtils` if you are already using Apache Commons IO jars, otherwise there is no benefit since internally it’s using ByteArrayInputStream class. Below is the `toInputStream` method implementation from `IOUtils` class source code.

如果您已经在使用Apache Commons IO jar，则可以使用`IOUtils` ，否则没有任何好处，因为它在内部使用ByteArrayInputStream类。 下面是`IOUtils`类源代码的`toInputStream`方法实现。

public static InputStream toInputStream(final String input, final Charset encoding) {
            return new ByteArrayInputStream(input.getBytes(Charsets.toCharset(encoding)));
        }

That’s all about converting String to Input Stream in java.

这就是在Java中将String转换为Input Stream的全部内容。

> 翻译自: [https://www.journaldev.com/738/java-string-to-inputstream][https_www.journaldev.com_738_java-string-to-inputstream]

[InputStream to String]: https://www.journaldev.com/706/java-inputstream-to-string
[Java String to InputStream_ convert String to InputStream in java]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly9jZG4uam91cm5hbGRldi5jb20vd3AtY29udGVudC91cGxvYWRzLzIwMTIvMTEvSmF2YS1TdHJpbmctdG8tSW5wdXRTdHJlYW0ucG5n?x-oss-process=image/format,png
[Java String to InputStream_ convert String to InputStream in java_Java String to InputStream_ convert String to InputStream in java]: https://cdn.journaldev.com/wp-content/uploads/2012/11/Java-String-to-InputStream.png
[ByteArrayInputStream]: https://docs.oracle.com/javase/7/docs/api/java/io/ByteArrayInputStream.html
[https_www.journaldev.com_738_java-string-to-inputstream]: https://www.journaldev.com/738/java-string-to-inputstream