java中怎么将由数字组成的字符串转化为数组？ java中怎么将由数字组成的字符串转化为数组？
java\u4e2d\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\uff1f1\uff0c
\u5982\u679c\u662f \u201c\u5b57\u7b26\u4e32\u6570\u7ec4\u201d \u8f6c \u201c\u5b57\u7b26\u4e32\u201d\uff0c\u53ea\u80fd\u901a\u8fc7\u5faa\u73af\uff0c\u6ca1\u6709\u5176\u5b83\u65b9\u6cd5 String[] str = {"abc", "bcd", "def"};StringBuffer sb = new StringBuffer();for(int i = 0; i < str.length; i++){sb. append(str[i]);}String s = sb.toString();2\uff0c
\u5982\u679c\u662f \u201c\u5b57\u7b26\u6570\u7ec4\u201d \u8f6c \u201c\u5b57\u7b26\u4e32\u201d \u53ef\u4ee5\u901a\u8fc7\u4e0b\u8fb9\u7684\u65b9\u6cd5 char[] data={'a','b','c'}; String s=new String(data);
3\uff0c
\u4f7f\u7528StringUtils\u4e2d\u7684join\u51fd\u6570\u3002org.apache.commons.lang.StringUtils;
4\uff0c
\u5c06\u6570\u7ec4\u53d8\u6210\u5b57\u7b26\u4e32
5\uff0c
StringUtils.join(str)
// \u5c06\u6570\u7ec4\u7528\u9017\u53f7\u5206\u9694\u53d8\u6210\u5b57\u7b26\u4e32
StringUtils.join(str, ",")
\u5c06\u5b57\u7b26\u4e32\u53d8\u6210\u6570\u7ec4\u65b9\u6cd5\uff1a
java.lang\u5305\u4e2d\u6709String.split()\u65b9\u6cd5,java\u4e2d\u901a\u5e38\u7528split()\u5206\u5272\u5b57\u7b26\u4e32\uff0c\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u6570\u7ec4\u3002
\u7279\u6b8a\uff0c\u8f6c\u4e49\u5b57\u7b26\uff0c\u5fc5\u987b\u52a0"\\"\uff08\u201c.\u201d\u548c\u201c|\u201d\u90fd\u662f\u8f6c\u4e49\u5b57\u7b26\uff09
1\uff0c\u5728Java\u8bed\u8a00\u7f16\u7a0b\u65f6\uff0c\u4f7f\u7528\u201c\u53e3\u4ee4\u5b57\u6bb5\u201cjPasswordField\u7ec4\u4ef6\u65f6\uff0c\u5982\u679c\u8981\u83b7\u5f97\u5bc6\u7801\u503c\uff0c\u5c31\u9700\u8981\u4f7f\u7528\u8be5\u7ec4\u4ef6\u7684getPassword()\u65b9\u6cd5,
2\uff0cjPasswordField\u7684getPassword()\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2achar\u7c7b\u578b\u7684\u6570\u7ec4\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5c06\u8fd9\u4e2a\u6570\u7ec4\u8f6c\u6362\u4e3aString\u7c7b\u578b\uff0c\u4ee5\u4fbf\u8fdb\u884c\u8bf8\u5982\u53e3\u4ee4\u5339\u914d\u6216\u53e3\u4ee4\u8d4b\u503c\u7b49\u64cd\u4f5c\u3002
3\uff0c\u8fd9\u65f6\uff0c\u5c31\u9700\u8981\u5c06char\u7c7b\u578b\u7684\u6570\u7ec4\u8fdb\u884c\u8f6c\u6362\u3002\u5f53\u7136\u4e5f\u7ecf\u5e38\u4f1a\u9047\u5230\u5c06String\u7c7b\u578b\u8f6c\u6362\u4e3achar\u6570\u7ec4\u7684\u60c5\u51b5\u3002
\u4e3b\u8981\u662f\u901a\u8fc7\u5305\u88c5\u7c7b\u63d0\u4f9b\u5b57\u7b26\u4e32\u4e0e\u6574\u578b\u7684\u8f6c\u6362\u65b9\u6cd5\u6765\u5b9e\u73b0\u7684\uff1b
\u6211\u5199\u4e86\u4e2a\u4f8b\u5b50\u4f60\u53ef\u4ee5\u8bd5\u4e00\u4e0b\uff1a
String str = "12,34,65,85,45,11"; //\u5b9a\u4e49\u4e00\u4e2a\u7531\u6574\u578b\u6784\u6210\u7684\u5b57\u7b26\u4e32
String[] strArr = str.split(","); //\u7136\u540e\u4f7f\u7528split\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u62c6\u89e3\u5230\u5b57\u7b26\u4e32\u6570\u7ec4\u4e2d
Integer[] intArr = new Integer[strArr.length]; //\u5b9a\u4e49\u4e00\u4e2a\u957f\u5ea6\u4e0e\u4e0a\u8ff0\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\u957f\u5ea6\u76f8\u901a\u7684\u6574\u578b\u6570\u7ec4
for(int a=0;a<strArr.length;a++){
intArr[a] = Integer.valueOf(strArr[a]); //\u7136\u540e\u904d\u5386\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c\u4f7f\u7528\u5305\u88c5\u7c7bInteger\u7684valueOf\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u4e3a\u6574\u578b
}
for(int b=0;b<intArr.length;b++){
System.out.println(intArr[b]);
}
我写了个例子你可以试一下：
String str = "12,34,65,85,45,11"; //定义一个由整型构成的字符串
String[] strArr = str.split(","); //然后使用split方法将字符串拆解到字符串数组中
Integer[] intArr = new Integer[strArr.length]; //定义一个长度与上述的字符串数组长度相通的整型数组
for(int a=0;a<strArr.length;a++){
intArr[a] = Integer.valueOf(strArr[a]); //然后遍历字符串数组，使用包装类Integer的valueOf方法将字符串转为整型
}
for(int b=0;b<intArr.length;b++){
System.out.println(intArr[b]);
}
public class StringToArray {
public static void main(String[] args) {
String str = "12,45,56,89";//你给的字符串
String[] strArray = str.split(",");//使用split方法根据逗号将字符串拆分成字符串数组
for (int i = 0; i < strArray.length; i++) {
System.out.print(strArray[i] + " ");
}
}
}
输出结果：12 45 56 89
import java.lang.reflect.Array;
import java.util.Arrays;
public class Kits
{
/**
* 将一个字符串按照指定字符顺序拆分为数组，维度由参数regexs长度决定，拆分顺序也由regexs元素顺序决定。<br>
* 例如：<br>
* 字符串"1,2:3,4|5,6:7,8" 拆分时传入regexs为拆分正则表达式数组 {"\\|",":",","}，
* 获得的数组是一个三维数组为{{{1,2},{3,4}},{{5,6},{7,8}}}<br>
* <br>
* 参数： <li>str：拆分源字符串<br> <li>regexs: 拆分正则表达式数组<br><li>
* needToInt：标识是否拆分为int数组<br>
*/
public static Object split(String str,String[] regexs,boolean needToInt)
{
if(regexs==null||regexs.length==0)
return needToInt?Integer.parseInt(str):str;
String[] strs=str.split(regexs[0]);
int[] dimensions=new int[regexs.length];
dimensions[0]=strs.length;
Class<?> clazz=null;
if(needToInt)
clazz=dimensions.getClass().getComponentType();
else
clazz=regexs.getClass().getComponentType();
Object array=Array.newInstance(clazz,dimensions);
String[] regexs_=new String[regexs.length-1];
System.arraycopy(regexs,1,regexs_,0,regexs_.length);
for(int i=0;i<strs.length;i++)
Array.set(array,i,split(strs[i],regexs_,needToInt));
return array;
}
public static void main(String[] args)
{
String s="11,22,33,44,55,66,77";
String[] regexs=new String[]{","};
int[] array=(int[])split(s,regexs,true);
System.out.println(Arrays.toString(array));
}
}
我这里写了个方法，，你直接拿去用就可以了，，只要字符串是按照一定规律组合的，都能拆分，可以选择拆分为int数组还是String数组
public class Test{
public static void main(String[]args){
String temp="12,45,56,89";
String []strs=temp.split(",");
for(int i=0;i<strs.length;i++){
System.out.println(strs[i]);
}
}
}
字符串有个toArray方法
绛旓細涓昏鏄氳繃鍖呰绫绘彁渚涘瓧绗︿覆涓庢暣鍨嬬殑杞崲鏂规硶鏉ュ疄鐜扮殑锛涙垜鍐欎簡涓緥瀛愪綘鍙互璇曚竴涓嬶細String str = "12,34,65,85,45,11"; //瀹氫箟涓涓敱鏁村瀷鏋勬垚鐨勫瓧绗︿覆 String[] strArr = str.split(","); //鐒跺悗浣跨敤split鏂规硶灏嗗瓧绗︿覆鎷嗚В鍒板瓧绗︿覆鏁扮粍涓 Integer[] intArr = new Integer[strArr.len...
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绛旓細鏂规硶涓锛氱洿鎺ュ己鍒惰浆鎹銆傚锛歋tring str= 锛圫tring锛123锛涙柟娉曚簩锛氱洿鎺ラ氳繃绌哄瓧绗︿覆+鏁板瓧鐨勫舰寮忚浆鎹负瀛楃涓诧紙鍓嶅悗閮藉彲浠ョ敤锛夈傚锛歋tring str= ""+123锛涙柟娉曚笁锛氱洿鎺ラ氳繃鍖呰绫绘潵瀹炵幇銆傚锛歋tring str = String.valueOf(1231);
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