java - 通过java将文件路径保存到mysql

Question

我已阅读所有解决方案，但现在我不知道如何通过 java jdbc 将文件路径保存到 mysql。 这是我的代码:

enter  try{
        String url= "jdbc:mysql://127.0.0.1:3306/test";
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        con= DriverManager.getConnection(url,"root","");
        System.out.println("ket noi thanh cong");
        s = con.createStatement( );

        JFileChooser chooser = new JFileChooser();
        chooser.showOpenDialog(null);
        File f = chooser.getSelectedFile();
        fileName = f.getAbsolutePath().toString();

        String input = "INSERT INTO imagesrc ( image_src ) VALUES (?);";
        PreparedStatement p = con.prepareStatement(input);
        p.setString(1, fileName);

        System.out.println(p.toString());
        p.executeQuery();

    }
    catch(Exception e){
        System.out.println("error");
    } here

但是没有运行并且出现错误？ 当我通过以下方式打印 SQL 代码时:

System.out.println(p.toString());

将其复制并粘贴到 mysql 中，运行后没有错误？ 请帮助我，谢谢

谢谢 salah anh，这是解决方案:

String url= "jdbc:mysql://127.0.0.1:3306/test";
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    con= DriverManager.getConnection(url,"root","");
    System.out.println("ket noi thanh cong");
    s = con.createStatement( );

    JFileChooser chooser = new JFileChooser();
    chooser.showOpenDialog(null);
    File f = chooser.getSelectedFile();
    fileName = f.getAbsolutePath();

    String input = "INSERT INTO imagesrc ( image_src ) VALUES (?)";
     PreparedStatement p = con.prepareStatement(input);
     p.setString(1, fileName);
     // s.executeUpdate(input);
     p.executeUpdate();

Answer 1

您将需要使用executeUpdate() 方法来执行INSERT 语句，而您将需要使用executeQuery() 方法来执行SELECT 语句。这是由于 JDBC 规范对其使用提出了要求:

来自 Statement.executeQuery() 的 Java API 文档:

Executes the given SQL statement, which returns a single ResultSet object.

Parameters:

sql - an SQL statement to be sent to the database, typically a static SQL SELECT statement

以及来自 Java API 文档 Statement.executeUpdate() :

Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement.

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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