Example usage for java.sql Connection close

List of usage examples for java.sql Connection close

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Introduction

In this page you can find the example usage for java.sql Connection close.

Prototype

void close() throws SQLException;

Source Link

Document

Releases this Connection object's database and JDBC resources immediately instead of waiting for them to be automatically released.

Usage

From source file:CreateDatabase.java

public static void main(String[] args) {
    Connection connection = null;
    Statement statement = null;/*from www.  j ava2 s . c  om*/
    try {
        Class.forName("org.gjt.mm.mysql.Driver").newInstance();
        String url = "jdbc:mysql://localhost/mysql";
        connection = DriverManager.getConnection(url, "username", "password");

        statement = connection.createStatement();
        String hrappSQL = "CREATE DATABASE hrapp";
        statement.executeUpdate(hrappSQL);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException e) {
            } // nothing we can do
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (SQLException e) {
            } // nothing we can do
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    // Move cursor to the last row
    rs.absolute(-1);//  w ww  .j a  v  a 2 s .  c o  m
    // Get data at cursor
    String id = rs.getString("id");
    System.out.println(id);

    // Move cursor to the second-to-last row
    //rs.absolute(-2);

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();

    DatabaseMetaData mtdt = conn.getMetaData();

    // list catalogs managed by this dbms
    System.out.println(mtdt.getCatalogTerm());

    ResultSet rs = mtdt.getCatalogs();

    ResultSetMetaData rsmd = rs.getMetaData();
    int numCols = rsmd.getColumnCount();
    for (int i = 1; i <= numCols; i++) {
        if (i > 1)
            System.out.print(", ");
        System.out.print(rsmd.getColumnLabel(i));
    }/* w ww. ja v  a  2  s.  c  o m*/
    System.out.println("");
    while (rs.next()) {
        for (int i = 1; i <= numCols; i++) {
            if (i > 1)
                System.out.print(", ");
            System.out.print(rs.getString(i));
        }
        System.out.println("");
    }
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");

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

    // Move cursor to the row to update
    rs.first();//w  w  w. ja v a2  s  .  com

    // Update the value of column column_1 on that row
    rs.updateString("name", "new data");

    // Discard the update to the row
    rs.cancelRowUpdates();

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");
    st = conn.createStatement();/*w w w .  j  a v  a  2  s  . c o  m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    rs = st.executeQuery("SELECT COUNT(*) FROM survey");
    // get the number of rows from the result set
    rs.next();
    int rowCount = rs.getInt(1);
    System.out.println(rowCount);

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

}

From source file:DemoPreparedStatementSetIntegers.java

public static void main(String[] args) throws Exception {
    String id = "0001";
    byte byteValue = 1;
    short shortValue = 1;
    int intValue = 12345;
    long longValue = 100000000L;

    Connection conn = null;
    PreparedStatement pstmt = null;
    try {/*from  ww  w .java2  s.c  om*/
        conn = getConnection();
        String query = "insert into integer_table(id, byte_column, "
                + "short_column, int_column, long_column) values(?, ?, ?, ?, ?)";

        // create PrepareStatement object
        pstmt = conn.prepareStatement(query);
        pstmt.setString(1, id);
        pstmt.setByte(2, byteValue);
        pstmt.setShort(3, shortValue);
        pstmt.setInt(4, intValue);
        pstmt.setLong(5, longValue);

        // execute query, and return number of rows created
        int rowCount = pstmt.executeUpdate();
        System.out.println("rowCount=" + rowCount);
    } finally {
        pstmt.close();
        conn.close();
    }
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    String URL = "jdbc:microsoft:sqlserver://yourServer:1433;databasename=pubs";
    String userName = "yourUser";
    String password = "yourPassword";

    Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
    Connection con = DriverManager.getConnection(URL, userName, password);
    CallableStatement callstmt = con
            .prepareCall("INSERT INTO myIdentTable (col2) VALUES (?);SELECT @@IDENTITY");
    callstmt.setString(1, "testInputBatch");
    callstmt.execute();//w w  w .  j  a  v a  2 s  . co m

    int iUpdCount = callstmt.getUpdateCount();
    boolean bMoreResults = true;
    ResultSet rs = null;
    int myIdentVal = -1; // to store the @@IDENTITY

    while (bMoreResults || iUpdCount != -1) {
        rs = callstmt.getResultSet();
        if (rs != null) {
            rs.next();
            myIdentVal = rs.getInt(1);
        }
        bMoreResults = callstmt.getMoreResults();
        iUpdCount = callstmt.getUpdateCount();
    }
    callstmt.close();
    con.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);

    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,null)");
    st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    // Move cursor to the end, after the last row
    rs.afterLast();/*from   www  .  j  a v  a2 s  . c o  m*/
    //String id = rs.getString("id");//Exception
    rs.previous();
    // Get data at cursor
    String id = rs.getString("id");
    System.out.println(id);

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    conn.setAutoCommit(false);/*from  ww w  .j ava  2s. co  m*/
    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();
    int[] updateCounts = pstmt.executeBatch();
    checkUpdateCounts(updateCounts);
    conn.commit();
    ResultSet rs = st.executeQuery("SELECT * FROM survey");
    outputResultSet(rs);
    rs.close();
    st.close();
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws SQLException {
    // DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    Connection conn = DriverManager.getConnection("jdbc:oracle:oci8:@yourDB", "scott", "tiger");

    Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    stmt.setFetchSize(1);/*  w w  w  . ja  v a 2  s  .c o m*/
    ResultSet rset = stmt.executeQuery("select EMPNO, ENAME, SAL from EMP");
    showProperty(rset);

    while (rset.next()) {
        System.out.println(rset.getInt(1) + " " + rset.getString(2) + " " + rset.getInt(3));
    }
    doSomeChanges(conn);
    // Place the cursor before the first row
    rset.beforeFirst();

    while (rset.next()) {
        System.out.println(rset.getInt(1) + " " + rset.getString(2) + " " + rset.getInt(3));
    }
    rset.close();
    stmt.close();
    cleanup(conn);
    conn.close();
}