java正则表达式拆分字符串

Question

使用 Java 正则表达式获取包含在“${VALUE}”内的字符串的正则表达式抛出异常

public static void main(String[] args) {

        String test = "Report for ${PROCESS_NAME} with status ${PROCESS_STATUS}";
        String[] results = test.split("\\${([^\\{\\}]*)\\}");
        for (String result : results) {
            System.err.println(result);
        }
    }



Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 1
\${([^\{\}]*)\}
 ^
    at java.util.regex.Pattern.error(Unknown Source)
    at java.util.regex.Pattern.closure(Unknown Source)
    at java.util.regex.Pattern.sequence(Unknown Source)

预期数组:results = PROCESS_NAME, PROCESS_STATUS;

输入的测试字符串不是固定长度的。正则表达式有什么问题。

Answer 1

我建议这个解决方案

    Matcher m = Pattern.compile("\\$\\{(.+?)\\}").matcher(test);
    while(m.find()) {
        System.out.println(m.group(1));
    }