Question

我需要解析一个csv文件并将数据存储到java bean类中。像：

email,fname,lname
imr@gmail.com,abc,xyz

这些细节变成了bean类。我能够解析一个csv文件。如何在bean类中存储细节。

private static List<List<String>> readTXTFile(String csvFileName) throws IOException {

     String line = null;
    BufferedReader stream = null;
    List<List<String>> csvData = new ArrayList<List<String>>();

    try {
        stream = new BufferedReader(new FileReader(csvFileName));
        while ((line = stream.readLine()) != null) {
            String[] splitted = line.split(",");
            List<String> dataLine = new ArrayList<String>(splitted.length);
            for (String data : splitted)
                dataLine.add(data);
            csvData.add(dataLine);
        }
    } finally {
        if (stream != null)
            stream.close();
    }

    return csvData;

}

上面的代码正在解析csv文件，但我希望将这些数据插入到java bean类中。

Answer 1

创建POJO

private class Data{//You can make it public too, in a separate class
    String email;
    String fname;
    String lname;

    //Getters

    //Setters
}

在您原来的课程中，您可以像这样使用

List<Data> datas = new ArrayList<Data>();
try {
    stream = new BufferedReader(new FileReader(csvFileName));
    while ((line = stream.readLine()) != null) {
        String[] splitted = line.split(",");
        Data data = new Data();
        data.setEmail(splitted[0]);
        data.setFname(splitted[1]);
        data.setLname(splitted[2]);

        datas.add(data);
    }
}

你的arraylist中将包含所有行。您可以进行空检查以提高效率。

Answer 2

使用OpenCSV

书写

        CSVWriter writer = new CSVWriter(new FileWriter("myfile.csv"), ',');
        String[] headers = {"id","name","address"};
        writer.writeNext(headers);

阅读（在bean内部设置并添加到列表中的示例）

USER_ID_INDEX等是常量

    CSVReader reader = new CSVReader(new InputStreamReader(userManActionForm.getUploadFile().getInputStream()));
    List<String[]> entries = reader.readAll();
    List<Member> memberList = new ArrayList<Member>();
        for (String[] entry : entries) {
            Member member = new Member();
            member.setUserId(entry[USER_ID_INDEX]);
            member.setUserName(entry[USER_NAME_INDEX]);
            member.setGroup(entry[USER_GROUP_INDEX]);
            memberList.add(member);
        }

https://code.google.com/p/opencsv/

如何解析csv文件并在java bean类中存储细节

2 个答案: