Java——Read/convert an InputStream to a String 获取InputStream 并将其转换为String的简单方法。 添加commons-io-2.4.jar import java.io.IOException; import java.io.InputStream; import org.apache.commons.io.IOUtils;publicclassStringFromFile {publicstaticvoidmain(String[] args) throws IOException { I...
String bStr = Convert.toStr(b); 转换为指定类型数组: String[] b = { "1", "2", "3", "4" }; //结果为Integer数组 Integer[] intArray = Convert.toIntArray(b); long[] c = {1,2,3,4,5}; //结果为Integer数组 Integer[] intArray2 = Convert.toIntArray(c); 转换为日期对象: Str...
为了将字符串转换为字节数组，可以使用String类的getBytes()方法。请记住，此方法使用平台的默认字符集。例如：字符串 string = " Java Tutorials";使用getBytes()方法将字符串转换为字节数组：byte[] bytes = string.getBytes();此外，Base64.getDecoder().decode()方法可以将字符串转换为字节数组。例如...
然后,我们可以编写代码以将User对象转换为 JSON 字符串: importcom.fasterxml.jackson.databind.ObjectMapper;publicclassJsonExample{publicstaticvoidmain(String[]args){Useruser=newUser("Alice",30);ObjectMapperobjectMapper=newObjectMapper();try{StringjsonString=objectMapper.writeValueAsString(user);System.out.print...
1. UsingInputStream.readAllBytes()(Since Java 9) TheInputStream.readAllBytes()API converts the input stream to bytes. Then we use thenew String()to create a newStringobject. InputStreamin=newFileInputStream(newFile("C:/temp/test.txt"));StringfileContent=newString(in.readAllBytes()); ...
String concatenation str = "" + c;is the worst way to convert char to string because internally it’s done bynew StringBuilder().append("").append(c).toString()that is slow in performance. Let’s look at the two methods to convert char array to string in java program. ...
To convert a String to double in Java, we can use: Double.parseDouble() static doubleparseDouble(String s): Returns a new double initialized to the value represented by the specified String, as performed by the valueOf method of class Double. ...
Example: Convert InputStream to String import java.io.*; public class InputStreamString { public static void main(String[] args) throws IOException { InputStream stream = new ByteArrayInputStream("Hello there!".getBytes()); StringBuilder sb = new StringBuilder(); String line; BufferedReader br...
Learn to convert float value to String using Float.toString() and String.valueOf() methods and format float to n decimal points.
Convert char to String(Java) String.valueOf(Object obj) Character.toString(char c)