Question

java指定字符串换行

原字符串: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

格式转变后的形式：
-----BEGIN CERTIFICATE-----
MIIC7jCCAlegAwIBAgIUfnKSsmMcfWy5GAoQ6uLPUFQWBwAwDQYJKoZIhvcNAQEF
BQAwWzEZMBcGA1UECh4QWSlaAYvaT+H/CG1Li9X/CTEbMBkGA1UECx4SWSlaAYva
T+H/CG1Li9X/CZDoMSEwHwYDVQQDHhhZKVoBi9pP4f8IbUuL1f8JdShiNwBDAEEw
HhcNMTIxMjE4MDAwMDAwWhcNMTMxMjE3MjM1OTU5WjBCMRMwEQYDVQQKDAppdHJ1
c2NoaW5hMRkwFwYDVQQLDBBDVVAgc3VwZXIgc2VydmVyMRAwDgYDVQQDDAd4aWFv
emhpMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC5msMuVhjc83sLyy40UwsS
pTWBvnlrPAdwoOFJWw+lJ6IPrft5DIO9pTyq+Dc1RGbvY9yAF5nT7yNFMY01/SjO
aUY0cAlSitbPAhV1ALRlM+XnbRGimnqcR1v32iiXEoPkybvLxmjdCN8uZ5eICCh9
xiZjLE/IJZWGksSL6PTKyQIDAQABo4HHMIHEMAkGA1UdEwQCMAAwCwYDVR0PBAQD
AgO4MBEGCWCGSAGG+EIBAQQEAwIGQDA0BgNVHSUELTArBggrBgEFBQcDAQYIKwYB
BQUHAwIGCisGAQQBgjcKAwMGCWCGSAGG+EIEATBhBgNVHR8EWjBYMFagVKBShlBo
dHRwOi8vMTkyLjE2OC4wLjEyNTo5MDgwL3B1YmxpYy9pdHJ1c2NybC5kbz9DQT0w
MUY3QzU4NEE4NkZBNjIyRjg4RjQ0OTc3MTg0ODIwMTANBgkqhkiG9w0BAQUFAAOB
gQBLY8VF4l9m9ZFGODyNfxrWkkH2ehnNSxzbXPZl0tGnfLE1Jgt1NLSwg98u8v4W
sLJeo/0Qd6R49ZPfS+bN6IGMOkWLeXs0WpRA+YyC8VnUgUDaqGfkVxKQ4vYuIi19
bUDuUQ7GPTO8QpZtf0tSocOi7FfGI8cWbm2LyXGnLl+FUQ==
-----END CERTIFICATE-----

求高手指定下........

Answer 1

我就不输入输出流了，参考下思路吧，就是加个变量作为计数器就好了。

public class test {
public static void main(String[] args) {
String str="MIIC7jCCAlegAwIBAgIUfnKSsmMcfWy5GAoQXSvRUOCqDgAwDQYJKoZIhvcNAQEFBQAwWzEZMBcGA1UECh4QWSlaAYvaT+H/CG1Li9X/CTEbMBkGA1UECx4SWSlaAYvaT+H/CG1Li9X/CZDoMSEwHwYDVQQDHhhZKVoBi9pP4f8IbUuL1f8JdShiNwBDAEEwHhcNMTIxMjE5MDAwMDAwWhcNMTMxMjE4MjM1OTU5WjBCMRMwEQYDVQQKDAppdHJ1c2NoaW5hMRkwFwYDVQQLDBBDVVAgc3VwZXIgc2VydmVyMRAwDgYDVQQDDAd4aWFvemhpMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC5msMuVhjc83sLyy40UwsSpTWBvnlrPAdwoOFJWw+lJ6IPrft5DIO9pTyq+Dc1RGbvY9yAF5nT7yNFMY01/SjOaUY0cAlSitbPAhV1ALRlM+XnbRGimnqcR1v32iiXEoPkybvLxmjdCN8uZ5eICCh9xiZjLE/IJZWGksSL6PTKyQIDAQABo4HHMIHEMAkGA1UdEwQCMAAwCwYDVR0PBAQDAgO4MBEGCWCGSAGG+EIBAQQEAwIGQDA0BgNVHSUELTArBggrBgEFBQcDAQYIKwYBBQUHAwIGCisGAQQBgjcKAwMGCWCGSAGG+EIEATBhBgNVHR8EWjBYMFagVKBShlBodHRwOi8vMTkyLjE2OC4wLjEyNTo5MDgwL3B1YmxpYy9pdHJ1c2NybC5kbz9DQT0wMUY3QzU4NEE4NkZBNjIyRjg4RjQ0OTc3MTg0ODIwMTANBgkqhkiG9w0BAQUFAAOBgQAmFpKC4yYeSI+iNbBUAaXjlafMxJW2vWEN5Rb9E31dneqqf7H0G8/0D0HY0KQr8HQY/hYzN1nKIAB0CHxHhb13cZeFxaPb+vRw9Ee2FGzUEqS+HQybC0AQWkgsZQ8pThH9d/aN02634CSrlxtNDGdAa2UNo6Xt3z1WjnW0jAW8fg==";
int count=1; //加入一个计数器
for(int i=0;i<str.length();i++){
System.out.print(str.charAt(i));
count++;
if(count==65){ //自己定义下多少个字符换行，你样例是65个换行
System.out.println(); //到了65个字就换行，也就是写入/r/n
count=1; //计数器初始化
}
}
}
}

追问

我写了，但我怎么在指定的位置写入/r/n，再指点下吧。

追答

比如bw.write("\r\n");

Answer 2

每隔65个字符加一个 \r\n 或 只加\n(Unix)

追问

这个我知道，但我的循环怎么写?给点提示^-^

Answer 3

要换行的字符尾 加上“/r/n”

Answer 4

\n