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Display MySQL table values using Java
For this, you can use the ResultSet concept. For connection, we will be using the MySQL JDBC Driver.
Let us create a table −
Example
mysql> create table demo87 -> ( -> name varchar(20), -> age int -> ) -> ; Query OK, 0 rows affected (0.62
Insert some records into the table with the help of insert command −
Example
mysql> insert into demo87 values('John',21);
Query OK, 1 row affected (0.15
mysql> insert into demo87 values('David',23);
Query OK, 1 row affected (0.12
mysql> insert into demo87 values('Bob',22);
Query OK, 1 row affected (0.16Display records from the table using select statement −
Example
mysql> select *from demo87;
This will produce the following output −
Output
+-------+------+| name | age |
+-------+------+| John | 21 |
| David | 23 || Bob | 22 |
+-------+------+3 rows in set (0.00 sec)
Following is the Java code to display table values in MySQL −
Example
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.HashMap;
import com.mysql.jdbc.Statement;
public class TableValuesDemo {
public static void main(String[] args) {
Connection con = null;
Statement statement = null;
try {
HashMap hm = new HashMap<>();
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/sampledatabase", "root", "123456");
statement = (Statement) con.createStatement();
String sql;
sql = "select *from demo87";
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
hm.put(resultSet.getString("name"), resultSet.getInt("age"));
}
System.out.println(hm);
} catch (Exception e) {
e.printStackTrace();
}
}
}This will produce the following output −
Output
{Bob=22, John=21, David=23}Following is the snapshot of sample output −
Updated on: 11-Dec-2020
4K+ Views
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