Java在MySQL数据库中创建表

是我目前遇到的问题，是无论这行代码

statement.executeUpdate(myTableName);

或代码

String myTableName = "CREATE TABLE AgentDetail (" 
     + "idNo INT(64) NOT NULL AUTO_INCREMENT," 
     + "initials VARCHAR(2)," 
     + "agentDate DATE," 
     + "agentCount INT(64))";

这些线当代码达到这几点，它生成一个由SQLException块捕获的错误。

它要么非常简单，它是非常复杂的

可能有人指出哪里这个新手到Java MySQL的编程做出了错误，希望不是错误，在此先感谢

这里的休息代码已满

public class DbStuff { 
    private String jdbcDriver = "com.mysql.jdbc.Driver"; 
    private String dbAddress = "jdbc:mysql://localhost:3306/"; 
    private String userPass = "?user=root&password="; 
    private String dbName = "TIGER19"; 
    private String userName = "root"; 
    private String password = ""; 

    private PreparedStatement preStatement; 
    private Statement statement; 
    private ResultSet result; 
    private Connection con; 

    public DbStuff() { 
     try { 
      Class.forName(jdbcDriver); 
      con = DriverManager.getConnection(dbAddress + dbName, userName, password); 
     } 
     catch (ClassNotFoundException e) { 
      e.printStackTrace(); 
     } 
     catch (SQLException e) { 
      createDatabase(); 
      createTableCub1(); 
     } 
    } 

    private void createDatabase() { 
     try { 
      Class.forName(jdbcDriver); 
      con = DriverManager.getConnection(dbAddress + userPass); 
      Statement s = con.createStatement(); 
      int myResult = s.executeUpdate("CREATE DATABASE IF NOT EXISTS " + dbName); 
     } 
     catch (ClassNotFoundException | SQLException e) { 
      e.printStackTrace(); 
     } 
    } 

    private void createTableCub1() { 
     String myTableName = "CREATE TABLE AgentDetail (" 
      + "idNo INT(64) NOT NULL AUTO_INCREMENT," 
      + "initials VARCHAR(2)," 
      + "agentDate DATE," 
      + "agentCount INT(64))"; 
     try { 
      Class.forName(jdbcDriver); 
      con = DriverManager.getConnection(dbAddress + dbName, userName, password); 
      statement = con.createStatement(); 
      //The next line has the issue 
      statement.executeUpdate(myTableName); 
      System.out.println("Table Created"); 
     } 
     catch (SQLException e) { 
      System.out.println("An error has occurred on Table Creation"); 
     } 
     catch (ClassNotFoundException e) { 
      System.out.println("An Mysql drivers were not found"); 
     } 
    } 
    }

来源

2013-09-25 K Spriggs

使用'e.printStackTrace（）'到你的'catch'block中。获取堆栈跟踪并添加到您的帖子。 – Smit

请这样做，我的猜测是你缺少'Connection.setCatalog（dbName）;'db创建和表创建之间，但实际的错误信息需要确认。 – rsanchez

为了使事情更清楚，并添加到Smit的注释中，将'System.out.println（e.getMessage（））'添加到'catch'块（和'e.printStackTrace（）'）以获得错误消息和它发生的地方。 – Barranka

您的表创建SQL语句不正确。要在mysql中设置列自动增量，它必须是主键。

CREATE TABLE AgentDetail ( 
     idNo INT(64) NOT NULL AUTO_INCREMENT, 
     initials VARCHAR(2), 
     agentDate DATE, 
     agentCount INT(64),PRIMARY KEY (`idNo`));

来源

2013-09-25 22:50:08

这可能是一个可能的原因。 – Smit

首先感谢您的帮助和建议。确实非常有用。由于这个我已经学会了三件事，

如何编写正确的指令如何创建表。
如何在Java中创建MySQL表。
Smit说，这是读取e.printStackTrace（）的信息。

这是我想出的代码。

private void createTableCub1() { 
    String myTableName = "CREATE TABLE AgentDetail (" 
      + "idNo INT(64) NOT NULL AUTO_INCREMENT," 
      + "initials VARCHAR(2)," 
      + "agentDate DATE," 
      + "agentCount INT(64), " 
      + "PRIMARY KEY(idNo))"; 
    try { 
     Class.forName(jdbcDriver); 
     con = DriverManager.getConnection(dbAddress + dbName, userName, password); 
     statement = con.createStatement(); 
     //This line has the issue 
     statement.executeUpdate(myTableName); 
     System.out.println("Table Created"); 
    } 
    catch (SQLException e) { 
     System.out.println("An error has occured on Table Creation"); 
     e.printStackTrace(); 
    } 
    catch (ClassNotFoundException e) { 
     System.out.println("An Mysql drivers were not found"); 
    } 
}

我当然欢迎并感谢任何及所有反馈

来源

2013-09-26 20:40:03

Java在MySQL数据库中创建表

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