我有一个包含大文件(100 MB)的ByteBuffer:
java.nio.ByteBuffer byteBuffer = ByteBuffer.wrap(multipartFile.getBytes());
writeChannel.write(byteBuffer);
writeChannel.closeFinally();
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我一次只能合法地写1 MB writeChannel.
如何切片ByteBuffer的内容,一次只写1 MB的切片到writeChannel?
String[] values = line.split(",");
Long locId = Long.parseLong(replaceQuotes(values[0]));
String country = replaceQuotes(values[1]);
String region = replaceQuotes(values[2]);
String city = replaceQuotes(values[3]);
String postalCode = replaceQuotes(values[4]);
String latitude = replaceQuotes(values[5]);
String longitude = replaceQuotes(values[6]);
String metroCode = replaceQuotes(values[7]);
String areaCode = replaceQuotes(values[8]);
//...
public String replaceQuotes(String txt){
txt = txt.replaceAll("\"", "");
return txt;
}
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我正在使用上面的代码用这种格式的数据解析CSV:
828,"US","IL","Melrose Park","60160",41.9050,-87.8641,602,708
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但是,当我遇到一系列数据时,如下所示我得到了 java.lang.ArrayIndexOutOfBoundsException: 7
1,"O1","","","",0.0000,0.0000,,
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这是否意味着我甚至试图访问该值时values[7],会抛出异常?
如果是这样,我如何解析文本行的那个位置不包含数据的行?
java csv exception-handling string-parsing indexoutofboundsexception