Example usage for java.sql Connection close

List of usage examples for java.sql Connection close

  1. HOME
  2. Java
  3. java
  4. java.sql.*
  5. Connection
  6. close

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:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySqlConnection();
    Statement st = conn.createStatement();
    st.executeUpdate("drop table survey;");
    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");

    DatabaseMetaData meta = conn.getMetaData();

    ResultSet rs = meta.getImportedKeys(conn.getCatalog(), null, "survey");
    while (rs.next()) {
        String fkTableName = rs.getString("FKTABLE_NAME");
        String fkColumnName = rs.getString("FKCOLUMN_NAME");
        int fkSequence = rs.getInt("KEY_SEQ");
        System.out.println("getExportedKeys(): fkTableName=" + fkTableName);
        System.out.println("getExportedKeys(): fkColumnName=" + fkColumnName);
        System.out.println("getExportedKeys(): fkSequence=" + fkSequence);
    }/*from   w  ww .  java  2s.  com*/

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getHSQLConnection();
    System.out.println("Got Connection.");
    Statement st = conn.createStatement();
    st.executeUpdate("create table survey (id int,name varchar);");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
    st.executeUpdate("insert into survey (id,name ) values (2,'anotherValue')");

    JdbcRowSet jdbcRS;/* ww w  .  j a  va 2  s  .  c  om*/
    jdbcRS = new JdbcRowSetImpl(conn);
    jdbcRS.setType(ResultSet.TYPE_SCROLL_INSENSITIVE);
    String sql = "SELECT * FROM survey";
    jdbcRS.setCommand(sql);
    jdbcRS.execute();
    jdbcRS.addRowSetListener(new ExampleListener());

    while (jdbcRS.next()) {
        // each call to next, generates a cursorMoved event
        System.out.println("id=" + jdbcRS.getString(1));
        System.out.println("name=" + jdbcRS.getString(2));
    }
    conn.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getConnection();
    conn.setAutoCommit(false);//  w  ww  .  j av a 2  s .c  o m
    Statement st = conn.createStatement();

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

    st.addBatch("INSERT INTO survey(id, name) " + "VALUES(444, 'ginger')");
    // we intentionally pass a table name (animals_tableZZ)
    // that does not exist
    st.addBatch("INSERT INTO survey(id, name) " + "VALUES(555, 'lola')");
    st.addBatch("INSERT INTO survey(id, name) " + "VALUES(666, 'freddy')");

    // Execute the batch
    int[] updateCounts = st.executeBatch();

    checkUpdateCounts(updateCounts);

    // since there were no errors, commit
    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 Exception {
    Connection conn = getConnection();
    Statement st = conn.createStatement();

    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 = conn.createStatement();//w w w .j  av  a2  s.  c o  m
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    // extract data from the ResultSet
    while (rs.next()) {
        int id = rs.getInt(1);
        System.out.println("id=" + id);
        String name = rs.getString(2);
        System.out.println("name=" + name);
        if (rs.wasNull()) {
            System.out.println("name is null");
        } else {
            System.out.println("name is not null");
        }
        System.out.println("---------------");
    }
    rs.close();
    st.close();
    conn.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    // DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
    final Connection c = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE", "system",
            "manager");
    String plsql = " declare " + "    p_id varchar2(20) := null; " + "    l_rc sys_refcursor;" + " begin "
            + "    p_id := ?; " + "    ? := 'input parameter was = ' || p_id;" + "    open l_rc for "
            + "        select 1 id, 'abc' name from dual; " + "    ? := l_rc;" + " end;";

    CallableStatement cs = c.prepareCall(plsql);
    cs.setString(1, "12345");
    cs.registerOutParameter(2, Types.VARCHAR);
    //  cs.registerOutParameter(3, OracleTypes.CURSOR);

    cs.execute();/*from   www .  ja v a  2  s. c  om*/

    System.out.println("Result = " + cs.getObject(2));

    ResultSet cursorResultSet = (ResultSet) cs.getObject(3);
    while (cursorResultSet.next()) {
        System.out.println(cursorResultSet.getInt(1) + " " + cursorResultSet.getString(2));
    }
    cs.close();
    c.close();
}

From source file:Main.java

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

    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 = conn.createStatement();/* www . j a v a 2s .  co m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    // extract data from the ResultSet
    while (rs.next()) {
        int id = rs.getInt("id");
        System.out.println("id=" + id);
        String name = rs.getString(2);
        System.out.println("name=" + name);
        if (rs.wasNull()) {
            System.out.println("name is null");
        } else {
            System.out.println("name is not null");
        }
        System.out.println("---------------");
    }
    rs.close();
    st.close();
    conn.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("com.mysql.jdbc.Driver");
    Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/testdb", "root", "");

    Statement statement = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
            ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = statement.executeQuery("SELECT * FROM products");

    // Move to the second row
    resultSet.absolute(2);/*  w  w w.ja  v a  2 s .  c  o m*/
    System.out.println("You are now in: " + resultSet.getRow());

    // Move 2 records forward from the current position (fourth row)
    resultSet.relative(2);
    System.out.println("You are now in: " + resultSet.getRow());

    // Move to the last row in the result set
    resultSet.absolute(-1);
    System.out.println("You are now in: " + resultSet.getRow());

    // Move 3 records backward from the current position (second row)
    resultSet.relative(-3);
    System.out.println("You are now in: " + resultSet.getRow());
    connection.close();
}

From source file:Main.java

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

    st.executeUpdate("create table images (Id int, b BLOB);");

    File file = new File("myimage.gif");
    FileInputStream fis = new FileInputStream(file);
    PreparedStatement ps = conn.prepareStatement("insert into images values (?,?)");
    ps.setString(1, "10");
    ps.setBinaryStream(2, fis);//w  w w .  j  a v a 2 s  .  c o m
    ps.executeUpdate();

    ResultSet rset = st.executeQuery("select b from images");
    InputStream stream = rset.getBinaryStream(1);
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    int a1 = stream.read();
    while (a1 >= 0) {
        output.write((char) a1);
        a1 = stream.read();
    }
    Image myImage = Toolkit.getDefaultToolkit().createImage(output.toByteArray());
    output.close();

    ps.close();

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

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Connection con = DriverManager.getConnection("jdbc:postgresql://localhost:5432/old", "user", "pass");
    Connection con1 = DriverManager.getConnection("jdbc:postgresql://localhost:5432/new", "user", "pass");

    String sql = "INSERT INTO users(" + "name," + "active," + "login," + "password)" + "VALUES(?,?,?,?)";

    Statement statement = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);

    PreparedStatement pstmt = con1.prepareStatement(sql);

    ResultSet rs = statement.executeQuery("SELECT * FROM users");
    while (rs.next()) {
        String nm = rs.getString(2);
        Boolean ac = rs.getBoolean(3);
        String log = rs.getString(4);
        String pass = rs.getString(5);
        pstmt.setString(1, nm);//from  w  ww . j  av a 2  s.  com
        pstmt.setBoolean(2, ac);
        pstmt.setString(3, log);
        pstmt.setString(4, pass);
        pstmt.executeUpdate();
    }
    con.close();
    con1.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getMySqlConnection();
    System.out.println("Got Connection.");
    Statement st = conn.createStatement();
    st.executeUpdate("drop table survey;");
    st.executeUpdate("create table survey (id int,name varchar(30));");
    st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");

    st = conn.createStatement();/* ww  w . j a v a 2 s. c  o m*/
    ResultSet rs = st.executeQuery("SELECT * FROM survey");

    ResultSetMetaData rsMetaData = rs.getMetaData();

    int numberOfColumns = rsMetaData.getColumnCount();
    System.out.println("resultSet MetaData column Count=" + numberOfColumns);

    for (int i = 1; i <= numberOfColumns; i++) {
        System.out.println("column MetaData ");
        System.out.println("column number " + i);
        // get the column's name.
        System.out.println(rsMetaData.getColumnName(i));

    }

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