Question

我似乎无法解决这个问题。我需要ResultSet来获取实际的Object。错误是：java.sql.SQLException: Can not issue data manipulation statements with executeQuery().位于rs = pst.executeQuery();。代码：

Connection con = null;
PreparedStatement pst = null;
ResultSet rs = null;

String url = null; //Set, but not visible in code.
String user = null; //Set, but not visible in code.
String password = null; //Set, but not visible in code.

public Object get(String table, String key){
    try {
        con = DriverManager.getConnection(url, user, password);

        String query = "SELECT * FROM `" + table + "` WHERE key = ?;";
        pst = con.prepareStatement(query);

        pst.setString(1, key);
        pst.executeUpdate();

        rs = pst.executeQuery();

        rs.next();

        return rs.getObject(1);

    } catch (SQLException ex) {

        return null;

    } finally {
        try {
            if (rs != null) {
                rs.close();
            }
            if (pst != null) {
                pst.close();
            }
            if (con != null) {
                con.close();
            }

        } catch (SQLException ex) {

            return null;

        }
    }
}

Answer 1

不要使用executeQuery使用你的sql语句所使用的executeUpdate 之间（更新，插入，删除）请参阅 https://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html#executeUpdate(java.lang.String)

java.sql.SQLException：无法使用executeQuery（）发出数据操作语句

1 个答案: