读写csv文件

1.使用IO流读写csv文件

1) 读

BufferedReader br = new BufferedReader(new FileReader("acsv.csv"));
String line = null;
while ((line = br.readLine()) != null){
    String[] strs = line.split(",");
    System.out.println(Arrays.toString(strs));
}

2) 写

File file = new File("acsva.csv");
if (!file.exists()) {
　　file.createNewFile();
}
    
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
bw.write(""李四"" + "," + ""1988"" + "," + ""1992"");
bw.newLine();

2.使用CsvReader、CsvWriter读写csv文件

1) 读

// 用来保存数据
ArrayList<String[]> csvList = new ArrayList<String[]>();

CsvReader reader = new CsvReader("abc.csv", ',', Charset.forName("utf-8")); 
// 跳过表头 如果需要表头的话，不要写这句。
reader.readHeaders();
// 逐行读入除表头的数据
while (reader.readRecord()) {
　　csvList.add(reader.getValues());
}

for (int row = 0; row < csvList.size(); row++) {
　　String cell = csvList.get(row)[0]; // 取得第row行第0列的数据
　　System.out.println(cell);
}

2) 写

CsvWriter wr = new CsvWriter("abc.csv", ',', Charset.forName("utf-8"));
String[] contents = { "告警信息", "非法操作", "没有权限", "操作失败" };
// 写入一行数据
wr.writeRecord(contents);