Question

我的sql脚本文件包含所有插入语句，如下所示

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如何将每个参数单独存储到ArrayList中，如下所示

 INSERT INTO PUBLIC.EMPLOYEE(ID, NAME) VALUES
    (1, 'Madhava'),
    (2, 'Rao'),
    (3, 'Tmr');  

    INSERT INTO PUBLIC.ADDRESS(ID, CITY) VALUES
    (1, 'Bangalore'),
    (2, 'Chirala'),
    (3, 'Pune');

我如何解析sql文件并将每个语句单独存储到Arraylist中，如上所述？

Answer 1

让我们假设我们有

String data = 
          " INSERT INTO PUBLIC.EMPLOYEE(ID, NAME) VALUES\r\n"
        + "    (1, 'Madhava'),\r\n" + "    (2, 'Rao'),\r\n"
        + "    (3, 'Tmr');  \r\n" + "\r\n"
        + "    INSERT INTO PUBLIC.ADDRESS(ID, CITY) VALUES\r\n"
        + "    (1, 'Bangalore'),\r\n" + "    (2, 'Chirala'),\r\n"
        + "    (3, 'Pune'); ";
List<String> inserts = new ArrayList<>();
Scanner sc = new Scanner(data); //you can also use new Scanner(new File("location/of/your/textfile.sql"));

您的解决方案可能看起来像（我们使用空行将数据分成几个部分）：

String command = "";
while (sc.hasNextLine()) {
    String line = sc.nextLine().trim();
    if (line.isEmpty() || command.isEmpty()) {
        command = line;
    } else {
        String values = line.replaceAll(",$", ";");//replace `,` at the end with ;
        inserts.add(command + " " + values);
    }
}

或者更简单（我们只需将命令设置为以＆＃34开头的行; INSERT＆＃34;并创建命令和非空行的连接）：

String command = "";
while (sc.hasNextLine()) {
    String line = sc.nextLine().trim();
    //ignore empty lines
    if (!line.isEmpty()) {
        if (line.startsWith("INSERT ")) {
            command = line;
        } else {
            //lets change `),` to `);`
            String values = line.replaceAll(",$", ";");
            inserts.add(command + " " + values);
        }
    }
}

如何将脚本文件中的所有insert语句存储到Arraylist中

1 个答案: