如何从Java中的字符串模板获取值

Question

I have a String template like this:

"Thanks, this is your value : [value]. And this is your account number : [accountNumber]"

And i have inputs like this:

input 1 : "Thanks, this is your value : 100. And this is your account number : 219AD098"

input 2 : "Thanks, this is your value : 150. And this is your account number : 90582374"

input 3 : "Thanks, this is your value : 200. And this is your account number : 18A47"

I want output like this:

output 1 : "[value] = 100 | [accountNumber] = 219AD098"

output 2 : "[value] = 150 | [accountNumber] = 90582374"

output 3 : "[value] = 200 | [accountNumber] = 18A47"

How to do that? Maybe using Regex?

note : the template is not fixed.. the only thing that fixed is [value] and [accountNumber]..

Answer 1

use this regex

(?<=value : )(\d+)|(?<=number : )(.+)(?=")

this will extract both the values from the lines that you want. after getting them you can concatenate them with anything you want like your output string.

the code to use this regex will be like this

Pattern pattern = Pattern.compile("(?<=value : )(\d+)|(?<=number : )(.+)(?=\")");
Matcher matcher = pattern.matcher(SOURCE_TEXT_LINE);
List<String> allMatches = new ArrayList<String>();
while (matcher.find()) {
 allMatches.add(matcher.group());
}

so this way you will get the matched values in this array list, of you can use a simple array if you prefer.

Answer 2

    String text = "Thanks, this is your value : 100. And this is your account number : 219AD098";
    Pattern pattern = Pattern
            .compile("Thanks, this is your value : (\\d+). And this is your account number : (\\w+)");
    Matcher matcher = pattern.matcher(text);
    matcher.find();
    String outputText = "[value] = " + matcher.group(1)
            + " | [accountNumber] = " + matcher.group(2);
    System.out.println(outputText);

Answer 3

is is easy to do without regex too:

String input = getInput();

String[] inputLines = input.split("\n");
String output = "";
int counter = 1;

for(string line : inputLines)
{
   int subValStart = line.indexOf("value : ");
   string val = line.substring(subValStart, line.indexOf("|") - subValStart);
   string accNum = line.substring("account number : ");
   output += "output " + counter + " :\"[value] = "+ val + " | [accountNumber] = " + accNum + "\"\n"; 
   counter++;
}

Answer 4

Try this, StringUtils.subStringBefore

   String sCurrentLine = CURRENT_LINE;
   String[] splitedValue = sCurrentLine.split(":");

   StringBuilder stringBuilder = new StringBuilder();
   stringBuilder.append(splitedValue[0].replace("input", "output"));
   stringBuilder.append(": \"[value] = "+StringUtils.substringBefore(splitedValue[2], "."));
   stringBuilder.append(" | [accountNumber] = "+splitedValue[3]);

Answer 5

You can use regular expression.

Here is full example

package snippet;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;



public class Test {

    public static void main(String[] args) throws CoffeeDOMException, IOException {
        String test = "Thanks, this is your value : 100 . And this is your account number : 219AD098";
        String valueExpression = "\\svalue\\s:([^.]+)";
        String accExpresion = "\\saccount\\snumber\\s:([^$]+)";
        System.out.println("Value:" + runSubRegex(valueExpression, test));
        System.out.println("Account:" + runSubRegex(accExpresion, test));

    }

    private static String runSubRegex(String regex, String tag) {
        Pattern p = Pattern.compile(regex);
        Matcher matcher = p.matcher(tag);
        if (matcher.find()) {
            return matcher.group(1);
        }
        return null;

    }

}

Output

Value: 100 
Account :  219AD098

Answer 6

Just check it out.

String template = "Thanks, this is your value : -XXXX-. And this is your account number : -XXXX- -XXXX- Value,Account Number";
String input = "Thanks, this is your value : 100. And this is your account number : 219AD098";

/*String template = "You can use -XXXX- mehod to read values from -XXXX- Value 1,value 2";
String input = "You can use this mehod to read values from custom string template";*/

String[] splitValue = template.split("-XXXX-");
for (String splitValueTemp : splitValue) {
    input = input.replace(splitValueTemp, "!");
}

List<String> value = Arrays.asList(input.split("!"));
List<String> Key = Arrays.asList(splitValue[splitValue.length - 1].split(","));
if (value != null && value.size() > 1) {
    int iCnt = 0;
    for (String opValue : value.subList(1, value.size())) {
        if (Key.size() > iCnt) {
            System.out.println(Key.get(iCnt).trim() + " : " + opValue.trim());
        }
        iCnt++;
    }
}

O/P: Value : 100
Account Number : 219AD098