获取嵌套类的内容

public class Foo {

    public static class MenuTreeRes {
        public static class MenuTreeRes_Message {
        }

        public static class MenuTreeRes_Data {
        }

        public static class MenuTreeRes_Menu {
        }
    }
}

 

 

public class FooTest {
    public static void main(String[] args) {
        String s = "public class Foo {\r\n" + 
                "\r\n" + 
                "    public static class MenuTreeRes {\r\n" + 
                "        public static class MenuTreeRes_Message {\r\n" + 
                "        }\r\n" + 
                "\r\n" + 
                "        public static class MenuTreeRes_Data {\r\n" + 
                "        }\r\n" + 
                "\r\n" + 
                "        public static class MenuTreeRes_Menu {\r\n" + 
                "        }\r\n" + 
                "    }\r\n" + 
                "}";
        
        String[] lines = s.split("\r\n");
        String content = content(lines,"MenuTreeRes");
        System.out.println(content);
    }
    
    private static String content(String[] lines, String className) {
        String target = String.format("public static class %s {", className).toLowerCase();
        StringBuffer sb = new StringBuffer();
        
        boolean started = false;
        int end = 0;
        for (String line : lines) {
            if(line.toLowerCase().contains(target)) {
                started = true;
                continue;
            }
            if(line.contains("public static class")) {
                end--;
            }
            if(line.trim().equals("}")) {
                end++;
            }
            if(end == 1) {
                break;
            }
            if(started) {
                sb.append(line).append("\r\n");
            }else {
                continue;
            }
        }
        
        return sb.toString();
    }
}

 

思路：类似重入锁的加锁和解锁

 

结果：

		public static class MenuTreeRes_Message {
		}

		public static class MenuTreeRes_Data {
		}

		public static class MenuTreeRes_Menu {
		}