Check BatchUpdateException : Batch Update « Database « Java Tutorial

1. Java Tutorial
2. Database
3. Batch Update

import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;

public class Main {
  public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    conn.setAutoCommit(false);
    Statement st = conn.createStatement();

    st.executeUpdate("create table survey (id int, name VARCHAR(30) );");

    String INSERT_RECORD = "insert into survey(id, name) values(?,?)";

    PreparedStatement pstmt = conn.prepareStatement(INSERT_RECORD);
    pstmt.setString(1, "1");
    pstmt.setString(2, "name1");
    pstmt.addBatch();

    pstmt.setString(1, "2");
    pstmt.setString(2, "name2");
    pstmt.addBatch();

    try {
      // execute the batch
      int[] updateCounts = pstmt.executeBatch();
    } catch (BatchUpdateException e) {
      int[] updateCounts = e.getUpdateCounts();
      checkUpdateCounts(updateCounts);
      try {
        conn.rollback();
      } catch (Exception e2) {
        e.printStackTrace();
        System.exit(1);
      }
    }
    // since there were no errors, commit
    conn.commit();

    ResultSet rs = st.executeQuery("SELECT * FROM survey");
    outputResultSet(rs);

    rs.close();
    st.close();
    conn.close();
  }

  public static void checkUpdateCounts(int[] updateCounts) {
    for (int i = 0; i < updateCounts.length; i++) {
      if (updateCounts[i] >= 0) {
        System.out.println("OK; updateCount=" + updateCounts[i]);
      } else if (updateCounts[i] == Statement.SUCCESS_NO_INFO) {
        System.out.println("OK; updateCount=Statement.SUCCESS_NO_INFO");
      } else if (updateCounts[i] == Statement.EXECUTE_FAILED) {
        System.out.println("Failure; updateCount=Statement.EXECUTE_FAILED");
      }
    }
  }

  private static void outputResultSet(ResultSet rs) throws Exception {
    ResultSetMetaData rsMetaData = rs.getMetaData();
    int numberOfColumns = rsMetaData.getColumnCount();
    for (int i = 1; i < numberOfColumns + 1; i++) {
      String columnName = rsMetaData.getColumnName(i);
      System.out.print(columnName + "   ");

    }
    System.out.println();
    System.out.println("----------------------");

    while (rs.next()) {
      for (int i = 1; i < numberOfColumns + 1; i++) {
        System.out.print(rs.getString(i) + "   ");
      }
      System.out.println();
    }

  }

  private static Connection getConnection() throws Exception {
    Class.forName("org.hsqldb.jdbcDriver");
    String url = "jdbc:hsqldb:mem:data/tutorial";

    return DriverManager.getConnection(url, "sa", "");
  }
}

ID   NAME   
----------------------
1   name1   
2   name2