Java CSVWriter.writeAll方法代碼示例

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
public static String generate(Map<String, Object> row) {
    StringWriter writer = new StringWriter();
    CSVWriter csvWriter = new CSVWriter(writer);

    String[] keys;
    ArrayList<String[]> output = new ArrayList<>();

    keys = row.keySet().toArray(new String[] {});
    Arrays.sort(keys);
    output.add(keys);

    String[] values = new String[keys.length];
    int i = 0;
    for(final String key : keys) {
        final Object value = row.get(key);
        values[i++] = (value != null) ? value.toString() : "null";
    }
    output.add(values);

    try {
        csvWriter.writeAll(output);
        return writer.toString();
    } catch (Exception e) {
        return CeeqlError.errorType(e.getClass().getSimpleName(), e.getMessage());
    }
}
 

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
public static void write2File(String filePath,List<String[]> lines) {
    //寫之前需要先寫入header
    List<String[]> addHeader = new ArrayList<>();
    String[] header = new String[21];
    header[0] = "id(編號)";
    header[1] = "sysid(係統ID)";
    header[2] = "imei(設備IMEI)";
    header[3] = "trucknum(車輛編號)";
    header[4] = "driverno(司機編號)";
    header[5] = "orgcode(機構號)";
    header[6] = "type(10為進出區域)";
    header[7] = "beginLng(開始經度)";
    header[8] = "beginLat(開始緯度)";
    header[9] = "beginTime(開始時間)";
    header[10] = "endLng(結束經度)";
    header[11] = "endLat(結束緯度)";
    header[12] = "endTime(結束時間)";
    header[13] = "triggerTime(觸發時間)";
    header[14] = "triggerLng(觸發經度)";
    header[15] = "triggerLat(觸發緯度)";
    header[16] = "createTime(創建時間)";
    header[17] = "updateTime(更新時間)";
    header[18] = "seconds(持續時間|秒)";
    header[19] = "additional_info(附加信息)";
    header[20] = "additional_key(額外key)";
    addHeader.add(header);
    addHeader.addAll(lines);
    try {
        Charset encoder = Charset.forName("GBK");//解決亂碼
        OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(filePath), encoder); 
        CSVWriter writer = new CSVWriter(out, ',');
        writer.writeAll(addHeader);
        writer.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
/**
 * 寫入(保存)消息曆史
 *
 * @param map key:消息名稱 value:消息詳情
 * @throws IOException
 */
public void writeMsgHis(Map<String, String[]> map) throws IOException {
    CSVWriter writer = new CSVWriter(new FileWriter(msgHisFile));
    String[] entries = new String[]{"消息名稱", "消息類型", "模板ID", "跳轉URL", "客服消息類型", "客服消息標題/內容", "客服消息圖片URL", "客服消息描述", "客服消息跳轉URL"};
    writer.writeNext(entries);
    writer.writeAll(map.values());
    writer.close();
}
 

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
/**
 * 保持模板數據
 *
 * @param msgName 消息名稱
 * @throws IOException
 */
public void writeTemplateData(String msgName) throws IOException {
    File dir = new File("data/template_data/");
    File file = new File("data/template_data/" + msgName + ".csv");
    if (!file.exists()) {
        dir.mkdirs();
        file.createNewFile();
    }

    CSVWriter writer = new CSVWriter(new FileWriter(file));

    List<String[]> records = new ArrayList<String[]>();

    // 如果table為空，則初始化
    if (MainWindow.mainWindow.getTemplateMsgDataTable().getModel().getRowCount() == 0) {
        Init.initTemplateDataTable();
    }

    // 逐行讀取
    DefaultTableModel tableModel = (DefaultTableModel) MainWindow.mainWindow.getTemplateMsgDataTable()
            .getModel();
    int rowCount = tableModel.getRowCount();
    String[] arryData;
    for (int i = 0; i < rowCount; i++) {
        arryData = new String[3];
        arryData[0] = (String) tableModel.getValueAt(i, 0);
        arryData[1] = (String) tableModel.getValueAt(i, 1);
        arryData[2] = ((String) tableModel.getValueAt(i, 2)).trim();
        records.add(arryData);
    }

    // 寫入文件
    writer.writeAll(records);
    writer.close();
}
 

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
/**
 * Saves the table to a file
 * @param f the file
 * @throws IOException an exception
 */
public void save( File f ) throws IOException
{
	CSVWriter csvWriter = new CSVWriter(new FileWriter( f.getAbsoluteFile() ),','); 
	int N = names.size();
	List<String[]> rows = new ArrayList<String[]>( N );
	
	int rowLength = 2 * ndims + 2;
	for( int i = 0; i < N; i++ )
	{
		String[] row = new String[ rowLength ];
		row[ 0 ] = names.get( i );
		row[ 1 ] = activeList.get( i ).toString();
		
		int k = 2;
		int j = 0;
		while( j < ndims )
			row[ k++ ] = movingPts.get( i )[ j++ ].toString();
		
		j = 0;
		while( j < ndims )
			row[ k++ ] = targetPts.get( i )[ j++ ].toString();
		
		
		rows.add( row );
		
	}
	csvWriter.writeAll( rows );
	csvWriter.close();
	
}
 

import com.opencsv.CSVWriter; //導入方法依賴的package包/類
public static void episodesToCSV(final Path containerPath) throws IOException {

        //read all episodes
        List<Episode> episodes = Episode.readEpisodes(containerPath.resolve("data").toAbsolutePath().toString());
        List<String[]> csv = new LinkedList<>();
        //use this object to turn the state into a vector of numbers
        NumericVariableFeatures features = new NumericVariableFeatures();
        State state = episodes.get(0).state(0);
        int featuresLength =  features.features(state).length;
        //write the header: old states, reward, action, new states
        String[] header = new String[featuresLength*2+2];
        for(int i=0; i<featuresLength; i++)
            header[i] = state.variableKeys().get(i).toString();
        header[featuresLength] = "reward";
        header[featuresLength+1] = "action";
        for(int i=0; i<featuresLength; i++)
            header[i+featuresLength+2] = "new_"+state.variableKeys().get(i).toString();
        csv.add(header);
        //for each episode and for each time step
        for(Episode e : episodes)
            for(int t=0; t<e.maxTimeStep(); t++) {

                //write the csv
                String[] line = new String[featuresLength*2+2];
                double[] preState = features.features(e.state(t));
                double[] postState = features.features(e.state(t+1));
                for(int i=0; i<featuresLength; i++)
                    line[i] = String.valueOf(preState[i]);
                line[featuresLength] = String.valueOf(e.reward(t+1));
                line[featuresLength+1] = String.valueOf(e.action(t));
                for(int i=0; i<featuresLength; i++)
                    line[i+featuresLength+2] = String.valueOf(postState[i]);
                csv.add(line);
            }
        //dump
        CSVWriter writer = new CSVWriter(new FileWriter(containerPath.resolve("data.csv").toFile()));
        writer.writeAll(csv);
    }