java - Java API将数组转换为CSV

假设我有一个int，float，string等数组。是否有任何实用程序API(例如Commons，Guava)会给我一个逗号分隔的字符串？

像这样

int[] a = {1,2,3,4,5}.
String s = magicAPI.getCSV(a); // s == "1,2,3,4,5";

最佳答案

我过去使用过OpenCSV。

StringWriter stringWriter = new StringWriter();
int[] a = {1,2,3,4,5};
String[] b = new String[a.length];
for ( int i = 0; i < a.length; i++) {
    b[i] = a[i];
}
CSVWriter csvWriter = new CSVWriter(stringWriter, ",");
csvWriter.writeNext(b);

但是，对于这样一个简单的示例，您可能只想使用StringBuilder和for循环