（转）通过getGeneratedKeys()获取主键

Statement stmt = null;    
ResultSet rs = null;    
try {    
    stmt = conn.createStatement(java.sql.ResultSet.TYPE_FORWARD_ONLY,    
                                java.sql.ResultSet.CONCUR_UPDATABLE);      
    // ...    
    // 省略若干行（如上例般创建demo表）    
    // ...    
    stmt.executeUpdate(    
            "INSERT INTO autoIncTutorial (dataField) "    
            + "values (‘Can I Get the Auto Increment Field?‘)",    
            Statement.RETURN_GENERATED_KEYS);                      // 向驱动指明需要自动获取generatedKeys！    
    int autoIncKeyFromApi = -1;    
    rs = stmt.getGeneratedKeys();                                  // 获取自增主键！    
    if (rs.next()) {    
        autoIncKeyFromApi = rs.getInt(1);    
    }  else {    
        // throw an exception from here    
    }     
    rs.close();    
    rs = null;    
    System.out.println("Key returned from getGeneratedKeys():"    
        + autoIncKeyFromApi);    
}  finally { ... }