java中怎样将把字母和数字组成的字符串才分开 java中怎样将把字母和数字组成的字符串才分开
java\u4e2d\u600e\u6837\u5c06\u628a\u5b57\u6bcd\u548c\u6570\u5b57\u7ec4\u6210\u7684\u5b57\u7b26\u4e32\u624d\u5206\u5f00\uff1f\uff1f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d
Pattern p_number = Pattern.compile("\\d+");//\u5339\u914d\u6570\u5b57
Pattern p_char = Pattern.compile([a-zA-Z]+);//\u5339\u914d\u5b57\u6bcd
\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53c8\u79f0\u6b63\u89c4\u8868\u793a\u6cd5\u3001\u5e38\u89c4\u8868\u793a\u6cd5\uff08\u82f1\u8bed\uff1aRegular Expression\uff0c\u5728\u4ee3\u7801\u4e2d\u5e38\u7b80\u5199\u4e3aregex\u3001regexp\u6216RE\uff09\uff0c\u8ba1\u7b97\u673a\u79d1\u5b66\u7684\u4e00\u4e2a\u6982\u5ff5\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u4f7f\u7528\u5355\u4e2a\u5b57\u7b26\u4e32\u6765\u63cf\u8ff0\u3001\u5339\u914d\u4e00\u7cfb\u5217\u7b26\u5408\u67d0\u4e2a\u53e5\u6cd5\u89c4\u5219\u7684\u5b57\u7b26\u4e32\u3002\u5728\u5f88\u591a\u6587\u672c\u7f16\u8f91\u5668\u91cc\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u901a\u5e38\u88ab\u7528\u6765\u68c0\u7d22\u3001\u66ff\u6362\u90a3\u4e9b\u7b26\u5408\u67d0\u4e2a\u6a21\u5f0f\u7684\u6587\u672c\u3002
\u5148\u628a\u5b57\u7b26\u4e32\u6253\u6563\u6210\u5b57\u7b26\u6570\u7ec4\uff0c\u7136\u540e\u76f4\u63a5\u5faa\u73af\u904d\u5386\u8fd9\u4e2a\u6570\u7ec4\u5224\u65ad\u662f\u5426\u4e3a\u6570\u5b57\uff0c\u7136\u540e\u74f6\u88c5\u5230\u53e6\u5916\u7684\u5b57\u7b26\u4e32
可以使用正则表达式进行匹配，给你写了一个小例子，可以运行的，如下：
String str = "lasdowuro345uj4vj5mb6mvvgk45b5knl";
String regex1 = "[a-zA-Z]";
String shuzi = str.replaceAll(regex1, "");
System.out.println(shuzi);
String regex2 = "\\d";
String zimu = str.replaceAll(regex2, "");
System.out.println(zimu);
还可以自己写一个方法，把字符串转成字符数组，使用for循环逐个去比较，如下：
String str = "lasdowuro345uj4vj5mb6mvvgk45b5knl";
char[] ch = str.toCharArray();
StringBuilder sb1 = new StringBuilder();
StringBuilder sb2 = new StringBuilder();
for (char c : ch) {
if(c >= '0' && c <='9'){
sb1.append(c);
}
if(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'){
sb2.append(c);
}
}
System.out.println(sb1.toString());
System.out.println(sb2.toString());
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怎么分开？按什么规则？
当初是您要分开，分开就分开。
如果需要全部分开，一个一个字符，"123av8d".split("");结果是["1","2","3","a","v","8","d"];
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