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List转为String数组 List对象.toArray(new String[0])

private String[] getStringArray() {
    return new String[]{"one", "two", "three"};
}

@Test
public void testConvertListToStringArray() {
    String[] indices = getStringArray();
    List<String> indicesList = Arrays.stream(indices).map(e -> "prefix_" + e).collect(Collectors.toList());
    String[] indicesArray = indicesList.toArray(new String[0]);
    System.out.println(Arrays.toString(indicesArray));
}

测试输出结果：

[prefix_one, prefix_two, prefix_three]