如何在Java中将字符转换为ASCII

绝地灬酷狼 2023-02-15 07:36 49阅读 0赞

在Java中，将字符转换为ASCII相当容易，它只是将char转换为int。

## 将字符转换为ASCII ##

int ascii = (int) character;

## 将ASCII转换为字符 ##

char character = (char)ascii;

## Java范例 ##

package com.mkyong.common;
    /**
     * Character Utility class
     * @author mkyong
     *
     */
    public class CharUtils 
    {   
    	/**
    	 * Convert the characters to ASCII value
    	 * @param character character
    	 * @return ASCII value
    	 */
    	public static int CharToASCII(final char character){
    		return (int)character;
    	}
    	
    	/**
    	 * Convert the ASCII value to character
    	 * @param ascii ascii value
    	 * @return character value
    	 */
    	public static char ASCIIToChar(final int ascii){
    		return (char)ascii;		
    	}
    }

## 单元测试 ##

package com.mkyong.common;
    import org.testng.Assert;
    import org.testng.annotations.*;
    /**
     * Character Utils Testing
     * @author mkyong
     *
     */
    public class CharUtilsTest {
    	
    	@DataProvider
    	public Object[][] ValidDataProvider() {
    		return new Object[][]{
    				{ 'A', 65 },{ 'a', 97 },
    				{ 'B', 66 },{ 'b', 98 },
    				{ 'C', 67 },{ 'c', 99 },
    				{ 'D', 68 },{ 'd', 100 },
    				{ 'Z', 90 },{ 'z', 122 },
    				{ '1', 49 },{ '9', 57 },
    				
    		};
    	}
    	
    	@Test(dataProvider = "ValidDataProvider")
    	public void CharToASCIITest(final char character, final int ascii) {
    		   int result = CharUtils.CharToASCII(character); 
    		   Assert.assertEquals(result, ascii);
    	}
    	
    	@Test(dataProvider = "ValidDataProvider")
    	public void ASCIIToCharTest(final char character, final int ascii) {
    		   char result = CharUtils.ASCIIToChar(ascii); 
    		   Assert.assertEquals(result, character); 
    	}
    }

## 单元测试结果 ##

PASSED: CharToASCIITest(A, 65)
    PASSED: CharToASCIITest(a, 97)
    PASSED: CharToASCIITest(B, 66)
    PASSED: CharToASCIITest(b, 98)
    PASSED: CharToASCIITest(C, 67)
    PASSED: CharToASCIITest(c, 99)
    PASSED: CharToASCIITest(D, 68)
    PASSED: CharToASCIITest(d, 100)
    PASSED: CharToASCIITest(Z, 90)
    PASSED: CharToASCIITest(z, 122)
    PASSED: CharToASCIITest(1, 49)
    PASSED: CharToASCIITest(9, 57)
    PASSED: ASCIIToCharTest(A, 65)
    PASSED: ASCIIToCharTest(a, 97)
    PASSED: ASCIIToCharTest(B, 66)
    PASSED: ASCIIToCharTest(b, 98)
    PASSED: ASCIIToCharTest(C, 67)
    PASSED: ASCIIToCharTest(c, 99)
    PASSED: ASCIIToCharTest(D, 68)
    PASSED: ASCIIToCharTest(d, 100)
    PASSED: ASCIIToCharTest(Z, 90)
    PASSED: ASCIIToCharTest(z, 122)
    PASSED: ASCIIToCharTest(1, 49)
    PASSED: ASCIIToCharTest(9, 57)
    
    ===============================================
        com.mkyong.common.CharUtilsTest
        Tests run: 24, Failures: 0, Skips: 0
    ===============================================
    
    
    ===============================================
    mkyong
    Total tests run: 24, Failures: 0, Skips: 0
    ===============================================

## 参考 ##

[http://www.asciitable.com/][http_www.asciitable.com]

标记： [Java][]

> 翻译自: [https://mkyong.com/java/how-to-convert-character-to-ascii-in-java/][https_mkyong.com_java_how-to-convert-character-to-ascii-in-java]

[http_www.asciitable.com]: http://www.asciitable.com/
[Java]: https://mkyong.com/tag/java/
[https_mkyong.com_java_how-to-convert-character-to-ascii-in-java]: https://mkyong.com/java/how-to-convert-character-to-ascii-in-java/