java导出csv文件工具类

以下是一个简单的Java导出CSV文件的工具类示例：

import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

public class CSVUtils {

    private static final char DEFAULT_SEPARATOR = ',';

    public static void writeLine(FileWriter writer, List<String> values) throws IOException {
        writeLine(writer, values, DEFAULT_SEPARATOR, ' ');
    }

    public static void writeLine(FileWriter writer, List<String> values, char separators) throws IOException {
        writeLine(writer, values, separators, ' ');
    }

    public static void writeLine(FileWriter writer, List<String> values, char separators, char customQuote) throws IOException {
        boolean first = true;

        if (separators == ' ') {
            separators = DEFAULT_SEPARATOR;
        }

        StringBuilder sb = new StringBuilder();
        for (String value : values) {
            if (!first) {
                sb.append(separators);
            }
            if (customQuote == ' ') {
                sb.append(followCVSformat(value));
            } else {
                sb.append(customQuote).append(followCVSformat(value)).append(customQuote);
            }

            first = false;
        }
        sb.append("\n");
        writer.append(sb.toString());
    }

    private static String followCVSformat(String value) {

        String result = value;
        if (result.contains("\"")) {
            result = result.replace("\"", "\"\"");
        }
        return result;

    }
}

使用示例：

import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Example {

    public static void main(String[] args) throws IOException {
        FileWriter writer = new FileWriter("data.csv");

        List<String> headers = new ArrayList<>();
        headers.add("Name");
        headers.add("Age");
        headers.add("Gender");
        CSVUtils.writeLine(writer, headers);

        List<String> record1 = new ArrayList<>();
        record1.add("John");
        record1.add("25");
        record1.add("Male");
        CSVUtils.writeLine(writer, record1);

        List<String> record2 = new ArrayList<>();
        record2.add("Jane");
        record2.add("30");
        record2.add("Female");
        CSVUtils.writeLine(writer, record2);

        writer.flush();
        writer.close();
    }
}

这个例子将生成一个名为“data.csv”的文件，包含两个记录和一个标题行。