使用JDBC Prepared语句的MySQL upsert(ON DUPLICATE KEY)

问题描述

我试图用Java中的准备好的语句编写一种具有UPSERT功能的方法.该代码如下所示；

I am trying to write a method to have an UPSERT functionality with a prepared statement in java. The code looks as follows;

public boolean addUserDeviceToken(String userid, String password, String deviceToken, Connection connection) {
    String addDeviceToken = "INSERT INTO swiped.Users (userid, password, deviceToken) VALUES( ?, ?, ?) ON DUPLICATE KEY UPDATE devicetoken = ?";
    boolean result = false;

    ResultSet rs = null;
    PreparedStatement st = null;
    try {
        st = connection.prepareStatement(addDeviceToken);
        st.setString(1, userid);
        st.setString(2, password);
        st.setString(3, deviceToken);
        st.setString(4, deviceToken);

我不确定是使用st.executeQuery();还是st.executeUpdate();，这肯定取决于重复密钥的条件?

What I am unsure of is whether i use st.executeQuery(); or st.executeUpdate(); as surely it depends on the condition of the duplicate key?

什么是正确的方法

谢谢

推荐答案

您不想获得resultSet，除了插入或更新的数量之外没有结果，只需使用 executeUpdate .

You don't want to get a resultSet, there's no result apart the number of insertions or updates, simply use executeUpdate.

从javadoc中提取:

Extract from the javadoc :

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