Apache Commons DBUtils - Update Query

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The following example will demonstrate how to update a record using Update query with the help of DBUtils. We'll update a record in Employees Table.

Syntax

String updateQuery = "UPDATE employees SET age=? WHERE id=?";
int updatedRecords = queryRunner.update(conn, updateQuery, 33,104);

Where,

  • updateQuery − Update query having placeholders.

  • queryRunner − QueryRunner object to update employee object in database.

To understand the above-mentioned concepts related to DBUtils, let us write an example which will run an update query. To write our example, let us create a sample application.

Step Description
1 Update the file MainApp.java created under chapter DBUtils - First Application.
2 Compile and run the application as explained below.

Following is the content of the Employee.java.

public class Employee {
   private int id;
   private int age;
   private String first;
   private String last;
   public int getId() {
      return id;
   }
   public void setId(int id) {
      this.id = id;
   }
   public int getAge() {
      return age;
   }
   public void setAge(int age) {
      this.age = age;
   }
   public String getFirst() {
      return first;
   }
   public void setFirst(String first) {
      this.first = first;
   }
   public String getLast() {
      return last;
   }
   public void setLast(String last) {
      this.last = last;
   }
}

Following is the content of the MainApp.java file.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;

public class MainApp {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost:3306/emp";

   //  Database credentials
   static final String USER = "root";
   static final String PASS = "admin";

   public static void main(String[] args) throws SQLException {
      Connection conn = null;
      QueryRunner queryRunner = new QueryRunner();
  
      DbUtils.loadDriver(JDBC_DRIVER);       
      conn = DriverManager.getConnection(DB_URL, USER, PASS);
      try {
         int updatedRecords = queryRunner.update(conn, 
            "UPDATE employees SET age=? WHERE id=?", 33,104);         
         System.out.println(updatedRecords + " record(s) updated.");
      } finally {
         DbUtils.close(conn);
      }        
   }
}

Once you are done creating the source files, let us run the application. If everything is fine with your application, it will print the following message.

1 record(s) updated.
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