java从MySQL数据库获取插入行的索引

Question

我正在使用Java（jdbc）与MySQL数据库交互。我有一个主索引是自动递增的表。当我插入一行时，我需要得到它刚刚收到的索引。我该怎么做

Answer 1

发件人：http://dev.mysql.com/doc/refman/5.0/en/connector-j-usagenotes-basic.html#connector-j-usagenotes-last-insert-id

stmt.executeUpdate(
        "INSERT INTO autoIncTutorial (dataField) "
        + "values ('Can I Get the Auto Increment Field?')",
        Statement.RETURN_GENERATED_KEYS);

//
// Example of using Statement.getGeneratedKeys()
// to retrieve the value of an auto-increment
// value
//

int autoIncKeyFromApi = -1;

rs = stmt.getGeneratedKeys();

if (rs.next()) {
    autoIncKeyFromApi = rs.getInt(1);
} else {

    // throw an exception from here
}

rs.close();

rs = null;

Answer 2

或者，使用Spring JDBC，它看起来像：

 Map<String, Object> map = new HashMap<String, Object>();
 map.put("column1", "test");
 map.put("column2", Boolean.TRUE);

 SimpleJdbcInsert insert = new SimpleJdbcInsert(template).withTableName("table").usingGeneratedKeyColumns("id");
 int id = insert.executeAndReturnKey(map).intValue();

Answer 3

感谢约翰·博克的出色回应

如果希望使用PreparedStatement，仍然可以使用^{，但必须以不同的方式应用命令：

PreparedStatement ps = mysql.prepareStatement(
    "INSERT INTO myTable (colA, colB, colC) VALUES (?, ?, ?)",
     Statement.RETURN_GENERATED_KEYS );
ps.setString(1, "My text");
ps.setTimestamp(2, new java.sql.Timestamp(new java.util.Date().getTime()););
ps.setInt(3, 5150);
ps.executeUpdate();
ResultSet results = ps.getGeneratedKeys();
results.next(); // Assume just one auto-generated key; otherwise, use a while loop here
System.out.println(results.getInt(1)); // there should only be 1 column in your results: the value of the auto-generated key

1. 在prepareStatement()中添加RETURN_GENERATED_KEYS参数 功能
2. 不是从statement.executeUpdate()而是从 statement.getGeneratedKeys()