Example usage for java.sql Connection 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[] argv) throws Exception {
    String url = "jdbc:mysql://localhost:3306/";
    String dbName = "javatutorial";
    String userName = "root";
    String password = "root";

    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection(url + dbName, userName, password);
    File imgfile = new File("images.jpg");
    FileInputStream fin = new FileInputStream(imgfile);
    PreparedStatement pre = con.prepareStatement("insert into Image values(?,?,?)");
    pre.setInt(1, 5);//  w  w  w  .  j a  v  a 2s.  co m
    pre.setString(2, "A");
    pre.setBinaryStream(3, fin, (int) imgfile.length());
    pre.executeUpdate();
    pre.close();
    con.close();
}

From source file:Main.java

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

    DatabaseMetaData meta = conn.getMetaData();
    ResultSet schemas = meta.getSchemas();
    while (schemas.next()) {
        String tableSchema = schemas.getString(1); // "TABLE_SCHEM"
        System.out.println("tableSchema:" + tableSchema);
        String tableCatalog = schemas.getString(2); //"TABLE_CATALOG"
        System.out.println("tableCatalog:" + tableCatalog);
    }//from   w  ww.j  a v a2 s .  c  o m

    conn.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Connection dbConnection = null;
    PreparedStatement preparedStatement = null;
    Class.forName(DB_DRIVER);/*from www  . j  a v  a2s.  c o m*/
    dbConnection = DriverManager.getConnection(DB_CONNECTION, DB_USER, DB_PASSWORD);
    String deleteSQL = "DELETE Person WHERE USER_ID = ?";
    preparedStatement = dbConnection.prepareStatement(deleteSQL);
    preparedStatement.setInt(1, 1001);

    preparedStatement.executeUpdate();
    preparedStatement.close();
    dbConnection.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = getOracleConnection();
    Statement stmt = null;/*www . j a v  a2 s  .  c o m*/
    ResultSet rs = null;
    stmt = conn.createStatement();
    //only for Oracle
    rs = stmt.executeQuery("select object_name from user_objects where object_type = 'VIEW'");

    while (rs.next()) {
        String tableName = rs.getString(1);
        System.out.println("viewName=" + tableName);
    }

    stmt.close();
    conn.close();
}

From source file:Main.java

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

    stmt.executeUpdate("create table survey (id int, name CHAR(5) );");

    stmt.executeUpdate("INSERT INTO survey(id, name)VALUES(111, '123456789')");

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

    outputResultSet(rs);/*  ww w  .  ja va2 s.  c  o  m*/

    stmt.executeUpdate("drop table survey");

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

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection conn = null;
    Statement stmt = null;/*from  www .ja v a2 s .  co m*/

    Class.forName(JDBC_DRIVER);
    conn = DriverManager.getConnection(DB_URL, USER, PASS);
    System.out.println("Deleting database...");
    stmt = conn.createStatement();

    conn = DriverManager.getConnection(DB_URL, USER, PASS);

    stmt = conn.createStatement();

    String sql = "DELETE FROM Person WHERE id = 1";
    stmt.executeUpdate(sql);
    stmt.close();
    conn.close();
}

From source file:JdbcDemo.java

public static void main(String args[]) throws Exception {
    String query = "SELECT Name,Description,Qty,Cost FROM Stock";

    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con = DriverManager.getConnection("jdbc:odbc:Inventory");
    Statement stmt = con.createStatement();
    ResultSet rs = stmt.executeQuery(query);
    while (rs.next()) {
        String name = rs.getString("Name");
        String desc = rs.getString("Description");
        int qty = rs.getInt("Qty");
        float cost = rs.getFloat("Cost");
        System.out.println(name + ", " + desc + "\t: " + qty + "\t@ $" + cost);
    }/*from  w  w w.  j ava  2 s.  c o m*/
    con.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, b BLOB);");

    PreparedStatement pstmt = conn.prepareStatement("INSERT INTO survey VALUES(1,?)");

    File file = new File("blob.txt");
    FileInputStream fis = new FileInputStream(file);
    pstmt.setBinaryStream(1, fis, (int) file.length());
    pstmt.execute();/* w w w.  j  a va 2s. com*/

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

From source file:Main.java

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

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

    outputResultSet(rs);

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

From source file:DynaBeansExampleV2.java

public static void main(String args[]) throws Exception {

    Connection conn = getConnection();
    PreparedStatement ps = conn//from  w w  w . ja v  a 2 s.c  o  m
            .prepareStatement("SELECT * from movie, person " + "WHERE movie.director = person.Id");
    ResultSet rs = ps.executeQuery();

    ResultSetDynaClass rsdc = new ResultSetDynaClass(rs);

    Iterator itr = rsdc.iterator();
    while (itr.hasNext()) {
        DynaBean bean = (DynaBean) itr.next();
        System.err.println(bean.get("title"));
    }

    conn.close();
}