插入类型 TIMESTAMP 的 Java JDBC MySQL 失败答案

【问题标题】：Java JDBC MySQL inserting into type TIMESTAMP fails插入类型 TIMESTAMP 的 Java JDBC MySQL 失败
【发布时间】：2013-07-20 12:56:30
【问题描述】：

我无法正确插入 TIMESTAMP 字段。

方法如下所示：

private static void addPickup(Connection conn, boolean debug, String 
        logfileName, String serverName, String mapName, long start, 
        long end) throws SQLException {

    try (CallableStatement statement = conn.prepareCall("{CALL AddPickup "
                 + "(?, ?, ?, ?, ?) }")) {
        statement.setString(1, logfileName);
        statement.setString(2, serverName);
        statement.setString(3, mapName);
        statement.setTimestamp(4, new Timestamp(start));
        statement.setTimestamp(5, new Timestamp(end));
        statement.execute();
    }
}

start 的值为 1373573918000

end 的值为 1373574819000

程序：

CREATE PROCEDURE AddPickup(
    IN logfilename VARCHAR(45), 
    IN servername VARCHAR(10), 
    IN mapname VARCHAR(20),
    IN start TIMESTAMP,
    IN end TIMESTAMP
)
AddPickup:BEGIN
IF EXISTS(SELECT p.id FROM pickup p WHERE p.logfile_name = logfilename) THEN
    LEAVE AddPickup;
END IF;

INSERT IGNORE INTO map (name) VALUES (mapname);
INSERT IGNORE INTO server (name) VALUES (servername);
INSERT INTO pickup (logfile_name, server_id, map_id, started, ended, datetime) 
    VALUES (
        logfilename, 
        (SELECT s.id FROM server s WHERE s.name = servername),
        (SELECT m.id FROM map m WHERE m.name = mapname),
        start,
        end,
        NOW()
    );
END //

表格：

CREATE TABLE map (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(20) UNIQUE NOT NULL
) ENGINE = 'InnoDB';

CREATE TABLE server (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(10) UNIQUE NOT NULL
) ENGINE = 'InnoDB';

CREATE TABLE pickup (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    logfile_name VARCHAR(45) UNIQUE NOT NULL,
    server_id INT UNSIGNED NOT NULL,
    map_id INT UNSIGNED NOT NULL,
    started TIMESTAMP NOT NULL,
    ended TIMESTAMP NOT NULL,
    datetime DATETIME NOT NULL,
    FOREIGN KEY (map_id) REFERENCES map(id) ON UPDATE CASCADE ON DELETE CASCADE,
    FOREIGN KEY (server_id) REFERENCES server(id) ON UPDATE CASCADE ON DELETE CASCADE
 ) ENGINE = 'InnoDB';

它将所有内容都插入到表中，只是 TIMESTAMP 字段 pickup.started 和 pickup.ended 总是显示“0000-00-00 00:00:00”，我不知道为什么。

【问题讨论】：

标签： java mysql jdbc timestamp

【解决方案1】：

我认为问题在于您传递给 setTimestamp

的参数

当我使用 setTimestamp 时，如果我没有要使用的具体日期，我总是传递一个 new Date().getTime() 作为参数。

private static void addPickup(Connection conn, boolean debug, String 
    logfileName, String serverName, String mapName, long start, 
    long end) throws SQLException {

try (CallableStatement statement = conn.prepareCall("{CALL AddPickup "
             + "(?, ?, ?, ?, ?) }")) {
    statement.setString(1, logfileName);
    statement.setString(2, serverName);
    statement.setString(3, mapName);
    statement.setTimestamp(4, new Date().getTime());
    statement.setTimestamp(5, new Date().getTime());
    statement.execute();
}

}

【讨论】：

【解决方案2】：

我不太确定它在 MYSQL 中是如何工作的，但是当我在 SQLSERVER 中使用时间戳时，TIMESTAMP 用于在创建行时自动生成，在这种情况下，我没有提供任何值查询的时间戳。所以只需尝试 n 插入其他值希望对你也有帮助。

【讨论】：