分割文本？

public class HelloWorld {
    public static void main(String []args) {
        String str = "{123:{Pox:466.25142847587307d,Poz:648.8300852981306d,Poy:4.0d,},str啊这:{Pox:472.70879534906925d,Poz:633.1415990048729d,Poy:4.0d,},1234:{Pox:472.70879534906925d,Poz:633.1415990048729d,Poy:4.0d,},啊这:{Pox:460.73324381977204d,Poz:628.3121038235982d,Poy:4.0d,},这:{Pox:477.42045188559365d,Poz:633.8240211895339d,Poy:4.0d,},hello:{Pox:466.25142847587307d,Poz:648.8300852981306d,Poy:4.0d,},123_1:{Pox:476.87948827209357d,Poz:632.9039626739195d,Poy:4.0d,},啊这00:{Pox:460.73324381977204d,Poz:628.3121038235982d,Poy:4.0d,},}";
        String[] str1 = str.split("},");
        String[] str2;
        for(int i=0;i<str1.length;i++){
            str2 = str1[i].split("\\:\\{");
            System.out.println(str2[0]);            
        }        
    }
}