用java8写一个list根据配置文件中写的条件进行skip的共通方法

以下是一个使用Java 8的Stream API实现的具有条件跳过功能的通用方法：

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class ListSkipper {

    public static <T> List<T> skip(List<T> list, String configFile) throws IOException {
        Properties props = new Properties();
        props.load(Files.newBufferedReader(Paths.get(configFile)));

        Map<String, String> conditions = props.entrySet().stream()
                .collect(Collectors.toMap(e -> e.getKey().toString(), e -> e.getValue().toString()));

        Stream<T> stream = list.stream();
        for (Map.Entry<String, String> entry : conditions.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            switch (key) {
                case "skipFirst":
                    stream = stream.skip(Integer.parseInt(value));
                    break;
                case "skipLast":
                    stream = stream.limit(list.size() - Integer.parseInt(value));
                    break;
                case "skipIfContains":
                    stream = stream.filter(item -> !item.toString().contains(value));
                    break;
                // Add more cases here for other conditions
                default:
                    throw new IllegalArgumentException("Unknown condition: " + key);
            }
        }

        return stream.collect(Collectors.toList());
    }
}

使用方法：

List<String> list = Arrays.asList("apple", "banana", "orange", "grape", "kiwi");

// Skip first 2 elements
List<String> result1 = ListSkipper.skip(list, "config1.properties");
System.out.println(result1); // [orange, grape, kiwi]

// Skip last 2 elements
List<String> result2 = ListSkipper.skip(list, "config2.properties");
System.out.println(result2); // [apple, banana]

// Skip elements containing "a"
List<String> result3 = ListSkipper.skip(list, "config3.properties");
System.out.println(result3); // [kiwi]

其中，配置文件`config1.properties`的内容为：

skipFirst=2

配置文件`config2.properties`的内容为：

skipLast=2

配置文件`config3.properties`的内容为：

skipIfContains=a