java - 正则表达式读取以下格式化字符串模式

Question

我想读取以下格式化行并将其映射到 java bean

80 : (1,53.38,€45) (2,88.62,€98) (3,78.48,€3) (4,72.30,€76) (5,30.18,€9)
7  : (1,10.02,€5) (2,8.2,€9) (3,7.8,€2) (4,7.0,€6) (5,3.18,€9)

因此，这里 : 之前的数字将被捕获为 int 值，并将映射到 TotalWeight 上，并且像 (1,53.38,€45) 这样的重复模式将映射到项目

这是我的 java bean

public class Package {

    private double maxWeigh; \\ so the digit value before : will be here

    private List<Product> products;  \\ (1,53.38,€45) will be parsed to product class

    public double getMaxWeigh() {
        return maxWeigh;
    }

    public void setMaxWeigh(double maxWeigh) {
        this.maxWeigh = maxWeigh;
    }

    public List<Product> getProducts() {
        return products;
    }

    public void setProducts(List<Product> products) {
        this.products = products;
    }
}

这是我的产品类别

public class Product {

    private int index;

    private double weight;

    private double cost;

    private String currencySymbol;

    public double getWeight() {
        return weight;
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }

    public double getCost() {
        return cost;
    }

    public void setCost(double cost) {
        this.cost = cost;
    }

    public String getCurrencySymbol() {
        return currencySymbol;
    }

    public void setCurrencySymbol(String currencySymbol) {
        this.currencySymbol = currencySymbol;
    }

    public int getIndex() {
        return index;
    }

    public void setIndex(int index) {
        this.index = index;
    }



}

这是我到目前为止所尝试的，但这仅适用于我想立即捕获整条产品线的产品部分

\\((\\d+),(\\d+\\.?\\d*?),€?(\\d+)\\)

Answer 1

下面的代码可让您迭代每个标记(a、b、c)并检索其成员。
它使用 named capturing groups .

import java.util.regex.*;

public static void main(String[] args) {

        Pattern headPattern = Pattern.compile("^(\\d+).*");
        Pattern tailPattern = Pattern.compile("\\((?<p1>\\d),(?<p2>\\d+\\.\\d+),(?<p3>€\\d+)\\)");
        Matcher m1 = headPattern.matcher("80 : (1,53.38,€45) (2,88.62,€98) (3,78.48,€3) (4,72.30,€76) (5,30.18,€9)");
        Matcher m2 = tailPattern.matcher("80 : (1,53.38,€45) (2,88.62,€98) (3,78.48,€3) (4,72.30,€76) (5,30.18,€9)");

        m1.matches();
        System.out.println("p0 = " + m1.group(1));

        while(m2.find()) {
            System.out.println("token = " + m2.group());
            System.out.println("p1 = " + m2.group("p1"));
            System.out.println("p2 = " + m2.group("p2"));
            System.out.println("p3 = " + m2.group("p3"));
        }
}