编写程序，统计一个文本文件中的字符（包括空格）数、单词数和行的数目。

要编写一个程序来统计文本文件中的字符数、单词数和行数，你可以使用Java的IO流和正则表达式来完成这个任务。以下是一个简单的示例，该程序读取文本文件并逐行处理：

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileCounter {
    public static void main(String[] args) {
        String filePath = "path_to_your_text_file.txt"; // 替换为你的文本文件路径
        int characterCount = countCharacters(filePath);
        int wordCount = countWords(filePath);
        int lineCount = countLines(filePath);

        System.out.println("Character Count: " + characterCount);
        System.out.println("Word Count: " + wordCount);
        System.out.println("Line Count: " + lineCount);
    }

    private static int countCharacters(String filePath) {
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            int sum = 0;
            String line;
            while ((line = br.readLine()) != null) {
                sum += line.length();
            }
            return sum;
        } catch (IOException e) {
            throw new RuntimeException("Error reading file", e);
        }
    }

    private static int countWords(String filePath) {
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            int wordCount = 0;
            String line;
            while ((line = br.readLine()) != null) {
                wordCount += line.split("\\s+").length; // 使用正则表达式分割单词，忽略标点符号
            }
            return wordCount;
        } catch (IOException e) {
            throw new RuntimeException("Error reading file", e);
        }
    }

    private static int countLines(String filePath) {
        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            int lineCount = 0;
            String line;
            while ((line = br.readLine()) != null) {
                lineCount++;
            }
            return lineCount;
        } catch (IOException e) {
            throw new RuntimeException("Error reading file", e);
        }
    }
}

在这个例子中，我们定义了三个辅助方法：`countCharacters`计算字符数，`countWords`计算单词数（不包含标点），`countLines`计算行数。每个方法都使用`BufferedReader`逐行读取文件，然后累加计数。

请确保将`path_to_your_text_file.txt`替换为你实际要处理的文本文件路径。运行此程序后，它将在控制台上输出给定文本文件的字符数、单词数和行数。