用java将多个Treemaps合并成csv表

FileWriter writer = new FileWriter("output.csv");

TreeMap<String, String> mergedMap = new TreeMap<>();
mergedMap.putAll(treeMap1);
mergedMap.putAll(treeMap2);
// 继续添加其他的Treemap

CSVWriter csvWriter = new CSVWriter(writer);
for (Map.Entry<String, String> entry : mergedMap.entrySet()) {
    String[] row = {entry.getKey(), entry.getValue()};
    csvWriter.writeNext(row);
}
csvWriter.close();

import java.io.FileWriter;
import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;

public class MergeTreemapsToCSV {
    public static void main(String[] args) {
        // 创建多个Treemaps
        TreeMap<String, String> treeMap1 = new TreeMap<>();
        treeMap1.put("key1", "value1");
        treeMap1.put("key2", "value2");

        TreeMap<String, String> treeMap2 = new TreeMap<>();
        treeMap2.put("key3", "value3");
        treeMap2.put("key4", "value4");

        // 合并Treemaps
        TreeMap<String, String> mergedMap = new TreeMap<>();
        mergedMap.putAll(treeMap1);
        mergedMap.putAll(treeMap2);

        // 将合并后的Treemap写入CSV文件
        try {
            FileWriter writer = new FileWriter("output.csv");
            CSVWriter csvWriter = new CSVWriter(writer);
            for (Map.Entry<String, String> entry : mergedMap.entrySet()) {
                String[] row = {entry.getKey(), entry.getValue()};
                csvWriter.writeNext(row);
            }
            csvWriter.close();
            System.out.println("CSV文件写入成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}