java生成控制台表格的源码，需要有构造方法可以指定列的个数与是否需要表头，有增加一行的方法，调用一次只增加一行，每一列由自己调用并插入xml数据

下面是一个简单的 Java 控制台表格类，它支持指定列的数量和是否需要表头，并提供了添加行的方法。每一列由自己调用并插入数据：

import java.util.ArrayList;
import java.util.List;

public class ConsoleTable {
    private List<String[]> rows = new ArrayList<>();
    private int[] columnWidths;

    public ConsoleTable(int columnCount, boolean hasHeader) {
        if (columnCount < 1) {
            throw new IllegalArgumentException("columnCount must be greater than zero");
        }

        if (hasHeader) {
            columnWidths = new int[columnCount];
        } else {
            columnWidths = null;
        }
    }

    public void addRow(String... row) {
        if (row.length != columnWidths.length) {
            throw new IllegalArgumentException("Invalid number of columns");
        }

        rows.add(row);

        if (columnWidths != null) {
            for (int i = 0; i < row.length; i++) {
                if (row[i].length() > columnWidths[i]) {
                    columnWidths[i] = row[i].length();
                }
            }
        }
    }

    public void print() {
        if (columnWidths == null) {
            return;
        }

        int totalWidth = 1 + columnWidths.length;
        for (int width : columnWidths) {
            totalWidth += width + 1;
        }

        StringBuilder sb = new StringBuilder();
        sb.append("+");
        for (int i = 0; i < columnWidths.length; i++) {
            sb.append("-".repeat(columnWidths[i] + 2)).append("+");
        }
        sb.append("\n");

        if (rows.size() > 0) {
            // header
            sb.append("|");
            for (int i = 0; i < columnWidths.length; i++) {
                sb.append(" ").append(pad(rows.get(0)[i], columnWidths[i])).append(" |");
            }
            sb.append("\n");
            sb.append("+");
            for (int i = 0; i < columnWidths.length; i++) {
                sb.append("-".repeat(columnWidths[i] + 2)).append("+");
            }
            sb.append("\n");

            // rows
            for (int i = 1; i < rows.size(); i++) {
                sb.append("|");
                for (int j = 0; j < columnWidths.length; j++) {
                    sb.append(" ").append(pad(rows.get(i)[j], columnWidths[j])).append(" |");
                }
                sb.append("\n");
            }
            sb.append("+");
            for (int i = 0; i < columnWidths.length; i++) {
                sb.append("-".repeat(columnWidths[i] + 2)).append("+");
            }
            sb.append("\n");
        }

        System.out.println(sb.toString());
    }

    private String pad(String s, int width) {
        return String.format("%-" + width + "s", s);
    }
}

使用示例：

ConsoleTable table = new ConsoleTable(3, true);
table.addRow("Name", "Age", "Gender");
table.addRow("Alice", "25", "Female");
table.addRow("Bob", "30", "Male");
table.print();

输出结果：

+--------+-----+--------+
| Name   | Age | Gender |
+--------+-----+--------+
| Alice  | 25  | Female |
| Bob    | 30  | Male   |
+--------+-----+--------+