怎么用正则表达式截取字符串，急！！！
字符串如下所示：


U#:zhang_san#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;U#:wang_wu#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;


我想把zhang_san和wang_wu截取出来

[解决办法]

Java code

        String text = "U#:zhang_san#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;U#:wang_wu#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;";        Matcher m = Pattern.compile("U#:([^#]+)#").matcher(text);        StringBuilder sb = new StringBuilder();        while(m.find()){            sb.append(m.group(1)).append(":");        }        if(sb.length()>1)            sb.deleteCharAt(sb.length()-1);        System.out.println(sb.toString());
[解决办法]
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Java code

        String text = "U#:zhang_san#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;U#:wang_wu#:ASSIGN#:2#:0#:0#:0#:#:#:#:#;";
        Matcher m = Pattern.compile("U#:([^#]+)#").matcher(text);
        Strin……