我有一个如下字符串 -
value1,value2,value3,value4,“value5,1234”,value6,value7,“value8”,value9,“value10,123.23”
如果我在上面的字符串上进行标记,我就会得到逗号分隔的标记。但是我想在进行拆分时用双引号后的字符串标记器忽略逗号。我该怎么说呢?
提前致谢
沙市
答案 0 :(得分:6)
使用像OpenCSV这样的CSV解析器来处理引用元素中的逗号,自动跨越多行等的值。您也可以使用该库将文本序列化为CSV格式。
String str = "value1, value2, value3, value4, \"value5, 1234\", " +
"value6, value7, \"value8\", value9, \"value10, 123.23\"";
CSVReader reader = new CSVReader(new StringReader(str));
String [] tokens;
while ((tokens = reader.readNext()) != null) {
System.out.println(tokens[0]); // value1
System.out.println(tokens[4]); // value5, 1234
System.out.println(tokens[9]); // value10, 123.23
}
答案 1 :(得分:2)
你只需要一行和正确的正则表达式:
String[] values = input.replaceAll("^\"", "").split("\"?(,|$)(?=(([^\"]*\"){2})*[^\"]*$) *\"?");
这也为你整理了包装双引号,包括最终报价!
注意:引用第一个术语时的有趣边缘情况需要使用replaceAll()
修剪引号的额外步骤。
这是一些测试代码:
String input= "\"value1, value2\", value3, value4, \"value5, 1234\", " +
"value6, value7, \"value8\", value9, \"value10, 123.23\"";
String[] values = input.replaceAll("^\"", "").split("\"?(,|$)(?=(([^\"]*\"){2})*[^\"]*$) *\"?");
for (String s : values)
System.out.println(s);
输出:
value1, value2
value3
value4
value5, 1234
value6
value7
value8
value9
value10, 123.23
答案 2 :(得分:2)
我对正则表达式过敏;为什么不按照某人的建议进行双重拆分?
String str = "value1, value2, value3, value4, \"value5, 1234\", value6, value7, \"value8\", value9, \"value10, 123.23\"";
boolean quoted = false;
for(String q : str.split("\"")) {
if(quoted)
System.out.println(q.trim());
else
for(String s : q.split(","))
if(!s.trim().isEmpty())
System.out.println(s.trim());
quoted = !quoted;
}
答案 3 :(得分:1)
您可以使用以下几种方法:
答案 4 :(得分:1)
如果没有任何第三方库依赖关系,以下代码也可以根据给定的要求解析字段:
import java.util.*;
public class CSVSpliter {
public static void main (String [] args) {
String inputStr = "value1, value2, value3, value4, \"value5, 1234\", value6, value7, \"value8\", value9, \"value10, 123.23\"";
StringBuffer sb = new StringBuffer (inputStr);
List<String> splitStringList = new ArrayList<String> ();
boolean insideDoubleQuotes = false;
StringBuffer field = new StringBuffer ();
for (int i=0; i < sb.length(); i++) {
if (sb.charAt (i) == '"' && !insideDoubleQuotes) {
insideDoubleQuotes = true;
} else if (sb.charAt(i) == '"' && insideDoubleQuotes) {
insideDoubleQuotes = false;
splitStringList.add (field.toString().trim());
field.setLength(0);
} else if (sb.charAt(i) == ',' && !insideDoubleQuotes) {
// ignore the comma after double quotes.
if (field.length() > 0) {
splitStringList.add (field.toString().trim());
}
// clear the field for next word
field.setLength(0);
} else {
field.append (sb.charAt(i));
}
}
for (String str: splitStringList) {
System.out.println ("Split fields: "+str);
}
}
}
这将提供以下输出:
拆分字段:value1
拆分字段:value2
拆分字段:value3
拆分字段:value4
拆分字段:value5,1234
拆分字段:value6
拆分字段:value7
拆分字段:value8
拆分字段:value9
拆分字段:value10,123.23
答案 5 :(得分:0)
String delimiter = ",";
String v = "value1, value2, value3, value4, \"value5, 1234\", value6, value7, \"value8\", value9, \"value10, 123.23\"";
String[] a = v.split(delimiter + "(?=(?:(?:[^\"]*+\"){2})*+[^\"]*+$)");