java_js十六进制和ASCII码互相转换。

叁歲伎倆 2022-07-28 05:27 181阅读 0赞

package jetf;
    
    public class StringToHex {
    
    	public String convertStringToHex(String str) {
    
    		char[] chars = str.toCharArray();
    
    		StringBuffer hex = new StringBuffer();
    		for (int i = 0; i < chars.length; i++) {
    			hex.append(Integer.toHexString((int) chars[i]));
    		}
    
    		return hex.toString();
    	}
    
    	public String convertHexToString(String hex) {
    
    		StringBuilder sb = new StringBuilder();
    		StringBuilder temp = new StringBuilder();
    
    		// 49204c6f7665204a617661 split into two characters 49, 20, 4c...
    		for (int i = 0; i < hex.length() - 1; i += 2) {
    
    			// grab the hex in pairs
    			String output = hex.substring(i, (i + 2));
    			// convert hex to decimal
    			int decimal = Integer.parseInt(output, 16);
    			// convert the decimal to character
    			sb.append((char) decimal);
    
    			temp.append(decimal);
    		}
    
    		return sb.toString();
    	}
    
    	// 504F533838383834 POS88884
    	public static void main(String[] args) {
    
    		StringToHex strToHex = new StringToHex();
    		System.out.println("\n-----ASCII码转换为16进制 -----");
    		String str = "1";
    		System.out.println("字符串: " + str);
    		String hex = strToHex.convertStringToHex(str);
    		System.out.println("转换为16进制 : " + hex);
    
    		System.out.println("\n***** 16进制转换为ASCII *****");
    		System.out.println("Hex : " + hex);
    		System.out.println("ASCII : " + strToHex.convertHexToString(hex));
    	}
    }

<pre name="code" class="javascript">function strToHexCharCode(str) {
    	if (str === "") {
    		return "";
    	} else {
    		var hexCharCode = [];
    		hexCharCode.push("0x");
    		for (var i = 0; i < str.length; i++) {
    			hexCharCode.push((str.charCodeAt(i)).toString(16));
    		}
    		return hexCharCode.join("");
    	}
    }
    
    function hexCharCodeToStr(hexCharCodeStr) {
    	var trimedStr = hexCharCodeStr.trim();
    	var rawStr = trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr;
    	var len = rawStr.length;
    	if (len % 2 !== 0) {
    		alert("存在非法字符!");
    		return "";
    	}
    	var curCharCode;
    	var resultStr = [];
    	for (var i = 0; i < len; i = i + 2) {
    		curCharCode = parseInt(rawStr.substr(i, 2), 16);
    		resultStr.push(String.fromCharCode(curCharCode));
    	}
    	return resultStr.join("");
    }