Java 要使用 IOUtils.toString() 导入什么?
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What to import to use IOUtils.toString()?
提问by user2380101
I am trying to use IOUtils.toString() to read from a file. However, I am getting an error saying "IOUtils cannot be resolved."
我正在尝试使用 IOUtils.toString() 从文件中读取。但是,我收到一条错误消息,提示“无法解析 IOUtils”。
What am I supposed to be importing to allow me to use this function?
我应该导入什么才能使用此功能?
String everything = IOUtils.toString(inputStream);
Thanks
谢谢
回答by kracejic
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.IOUtils;
回答by Himanshu Arora
Here is code for How to convert InputStream to String in Java using Apache IOUtils
这是如何使用 Apache IOUtils 在 Java 中将 InputStream 转换为 String 的代码
Reference : https://commons.apache.org/proper/commons-io/javadocs/api-2.4/org/apache/commons/io/IOUtils.html
参考:https: //commons.apache.org/proper/commons-io/javadocs/api-2.4/org/apache/commons/io/IOUtils.html
FileInputStream fis = new FileInputStream(FILE_LOCATION);
String StringFromInputStream = IOUtils.toString(fis, "UTF-8");
System.out.println(StringFromInputStream);
Let me know if you need more help.
如果您需要更多帮助,请告诉我。
回答by Fryta
import org.apache.commons.io.IOUtils;
导入 org.apache.commons.io.IOUtils;
If you still can't import add to pom.xml:
如果仍然无法导入添加到 pom.xml:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
or for direct jar/gradle etc visit: http://mvnrepository.com/artifact/commons-io/commons-io/2.5
或直接 jar/gradle 等访问:http://mvnrepository.com/artifact/commons-io/commons-io/2.5
Also since version 2.5 of commons-io method IOUtils.toString(inputStream) has been deprecated. You should use method with Encoding i.e.
此外,自 2.5 版的 commons-io 方法 IOUtils.toString(inputStream) 已被弃用。您应该使用 Encoding 方法,即
IOUtils.toString(is, "UTF-8");
回答by Sanjay Sharma
Alternatively you can try following way. It worked for me for reading public key for resource server
或者,您可以尝试以下方式。它适用于我读取资源服务器的公钥
final Resource resource = new ClassPathResource("public.key");
String publicKey = null;
try {
publicKey = new String(Files.readAllBytes(resource.getFile().toPath()), StandardCharsets.UTF_8);
} catch (IOException e) {
e.printStackTrace();
}
回答by thoredge
Fryta's answeroutline how to actually use IOUtils and snj's answeris good for files.
Fryta 的回答概述了如何实际使用 IOUtils,而snj 的回答适用于文件。
If you're on java 9 or later and you have an input stream to read you can use InputStream#readAllBytes(). Just create a string from there and don't forget to specify charset.
如果您使用的是 java 9 或更高版本并且您有一个要读取的输入流,则可以使用InputStream#readAllBytes()。只需从那里创建一个字符串,不要忘记指定字符集。
String s = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);