我目前有以下代码,它是我的 Gui,用于我的主要 gui 的一部分图像搜索器,从我的角度来看,它的目标是获取用户输入,然后打印出用户输入并将用户输入添加到另一组中JTextFields,然后使用此输入在我的数据库中搜索匹配图像,用户不需要选择所有 3 个搜索条件,只需选择一个。我的问题是我需要有关如何将用户输入存储在结果集列表中,然后使用这些存储的信息来查询我的数据库的指导。
到目前为止,我已经尝试获取用户输入,但我不确定接下来需要做什么。
class DisplaySearch {
// database URL
static final String DATABASE_URL = "jdbc:mysql://localhost:3306/mysql";
static final String USERNAME = "root";
static final String PASSWORD = "root";
// launch the application
public static void Search(String imageName, String DateStamp, String imageTag) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
Connection connection = null; // manages connection
Statement statement = null; // query statement
ResultSet resultSet = null; // manages results
// connect to database books and query database
try {
// establish connection to database
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(DATABASE_URL, USERNAME, PASSWORD);
// create Statement for querying database
statement = connection.createStatement();
// query database
resultSet = statement.executeQuery(
"SELECT imageName, DateStamp, imageTag FROM images");
// process query results
System.out.println("Search Criteria");
while (resultSet.next()) {
// Position the cursor
imageName = resultSet.getString(0);
DateStamp= resultSet.getString(1);
imageTag = resultSet.getString(2);
System.out.println("datas : " + imageName + " " + DateStamp + " " + imageTag );
//while (resultSet.next()) {
if (imageName != "" || imageName != null) {
String Name = resultSet.getString(imageName);
System.out.print("Image Name: " + Name);
resultSet = statement.executeQuery("SELECT imageName, DateStamp, imageTag FROM images where imageName='"
+ imageName + "'");
}
if (DateStamp != null) {
String Date = resultSet.getString(DateStamp);
System.out.print(", Date: " + Date);
resultSet = statement.executeQuery("SELECT imageName, DateStamp, imageTag FROM images where DateStamp='"
+ DateStamp + "'");
}
if (imageTag != "" || imageTag != null) {
String Tag = resultSet.getString(imageTag);
System.out.print(", Tag: " + Tag);
resultSet = statement.executeQuery("SELECT imageName, DateStamp, imageTag FROM images where imageTag='"
+ imageTag + "'");
}
} // end while
} // end try
catch (SQLException sqlException) {
sqlException.printStackTrace();
} // end catch
finally // ensure resultSet, statement and connection are closed
{
try {
resultSet.close();
statement.close();
connection.close();
} // end try
catch (Exception exception) {
exception.printStackTrace();
} // end catch
} // end finally
}
最佳答案
为什么要将数据存储在 ResultSet 对象中?我认为这不是推荐的方式。 您可以使用一些变量来存储您的值并将它们与您的查询一起使用以将数据放入结果集中
关于java - 获取用户输入,然后存储在 resultSet 列表中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19220039/