testsqlpersistent.java

hsql是很有名的嵌入式数据库

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package org.hsqldb.test;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;

import junit.framework.TestCase;
import junit.framework.TestResult;

/**
 * Test sql statements via jdbc against a database with cached tables
 * @author fredt@users
 */
public class TestSqlPersistent extends TestCase {

    // change the url to reflect your preferred db location and name
    // String url = "jdbc:hsqldb:hsql://localhost/yourtest";
    String     url = "jdbc:hsqldb:/hsql/test/testpersistent";
    String     user;
    String     password;
    Statement  sStatement;
    Connection cConnection;

    public TestSqlPersistent(String name) {
        super(name);
    }

    protected void setUp() {

        user        = "sa";
        password    = "";
        sStatement  = null;
        cConnection = null;

        try {
            Class.forName("org.hsqldb.jdbcDriver");

            cConnection = DriverManager.getConnection(url, user, password);
            sStatement  = cConnection.createStatement();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("TestSql.setUp() error: " + e.getMessage());
        }
    }

    /**
     *  demonstration of bug fix #482109 - inserting Integers
     *  and Strings with PreparedStatement.setObject() did not work;
     *  String, Integer and Array types are inserted and retrieved<b>
     *
     *  demonstration of retrieving values using different getXXX methods
     */
    public void testInsertObject() {

        Object  stringValue        = null;
        Object  integerValue       = null;
        Object  arrayValue         = null;
        Object  bytearrayValue     = null;
        Object  stringValueResult  = null;
        Object  integerValueResult = null;
        Object  arrayValueResult   = null;
        boolean wasNull            = false;
        String  message            = "DB operation completed";

        try {
            String sqlString = "DROP TABLE PREFERENCE IF EXISTS;"
                               + "CREATE CACHED TABLE PREFERENCE ("
                               + "User_Id INTEGER NOT NULL, "
                               + "Pref_Name VARCHAR(30) NOT NULL, "
                               + "Pref_Value OBJECT NOT NULL, "
                               + "DateCreated DATETIME DEFAULT NOW NOT NULL, "
                               + "PRIMARY KEY(User_Id, Pref_Name) )";

            sStatement.execute(sqlString);

            sqlString = "INSERT INTO PREFERENCE "
                        + "(User_Id,Pref_Name,Pref_Value,DateCreated) "
                        + "VALUES (?,?,?,current_timestamp)";

            PreparedStatement ps = cConnection.prepareStatement(sqlString);

            // initialise
            stringValue  = "String Value for Preference 1";
            integerValue = new Integer(1000);
            arrayValue   = new Double[] {
                new Double(1), new Double(Double.NaN),
                new Double(Double.NEGATIVE_INFINITY),
                new Double(Double.POSITIVE_INFINITY)
            };
            bytearrayValue = new byte[] {
                1, 2, 3, 4, 5, 6,
            };

            // String as Object
            ps.setInt(1, 1);
            ps.setString(2, "String Type Object 1");

// fredt - in order to store Strings in OBJECT columns setObject should
// explicitly be called with a Types.OTHER type
//            ps.setObject(3, stringValue); will throw an exception
            ps.setObject(3, stringValue, Types.OTHER);
            ps.execute();

            // Integer as Object
            ps.setInt(1, 2);
            ps.setString(2, "Integer Type Object 2");

//            ps.setObject(3, integerValue, Types.OTHER); should work too
            ps.setObject(3, integerValue);
            ps.execute();

            // Array as object
            ps.setInt(1, 3);
            ps.setString(2, "Array Type Object 3");
            /*
            ps.setCharacterStream(
                2, new java.io.StringReader("Array Type Object 3"), 19);
            */

            // ps.setObject(3, arrayValue, Types.OTHER); should work too
            ps.setObject(3, arrayValue);
            ps.execute();

            // byte arrray as object
            ps.setInt(1, 3);
            ps.setString(2, "byte Array Type Object 3");
            /*
            ps.setCharacterStream(
                2, new java.io.StringReader("byte Array Type Object 3"), 19);
            */

            // ps.setObject(3, bytearrayValue); will fail
            // must use this to indicate we are inserting into an OTHER column
            ps.setObject(3, bytearrayValue, Types.OTHER);
            ps.execute();

            ResultSet rs =
                sStatement.executeQuery("SELECT * FROM PREFERENCE");
            boolean result = rs.next();

            // a string can be retrieved as a String or a stream
            // as Unicode string
            String str = rs.getString(2);

            System.out.println(str);

            // as Unicode stream
            InputStream is = rs.getUnicodeStream(2);
            int         c;

            while ((c = is.read()) > -1) {
                c = is.read();

                System.out.print((char) c);
            }

            System.out.println();

            // as ASCII stream, ignoring the high order bytes
            is = rs.getAsciiStream(2);

            while ((c = is.read()) > -1) {
                System.out.print((char) c);
            }

            System.out.println();

            // JAVA 2 specific
            // as character stream via a Reader
            /*
            Reader re = rs.getCharacterStream(2);

            while ((c = re.read()) > -1) {
                System.out.print((char) c);
            }
            */

            // retrieving objects inserted into the third column
            stringValueResult = rs.getObject(3);

            rs.next();

            integerValueResult = rs.getObject(3);

            rs.next();

            arrayValueResult = rs.getObject(3);

            // how to check if the last retrieved value was null
            wasNull = rs.wasNull();

            // cast objects to original types - will throw if type is wrong
            String   castStringValue      = (String) stringValueResult;
            Integer  castIntegerValue     = (Integer) integerValueResult;
            Double[] castDoubleArrayValue = (Double[]) arrayValueResult;

            {
                sqlString = "DELETE FROM PREFERENCE WHERE user_id = ?";

                PreparedStatement st =
                    cConnection.prepareStatement(sqlString);

                st.setString(1, "2");

                int ret = st.executeUpdate();

                // here, ret is equal to 1, that is expected
                //conn.commit(); // not needed, as far as AUTO_COMMIT is set to TRUE
                st.close();

                st = cConnection.prepareStatement(
                    "SELECT user_id FROM PREFERENCE WHERE user_id=?");

                st.setString(1, "2");

                rs = st.executeQuery();

                while (rs.next()) {
                    System.out.println(rs.getString(1));
                }
            }
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        } catch (IOException e1) {}

        /*
        boolean success = stringValue.equals(stringValueResult)
                          && integerValue.equals(integerValueResult)
                          && java.util.Arrays.equals((Double[]) arrayValue,
                              (Double[]) arrayValueResult);
        */
        boolean success = true;

        assertEquals(true, success);
    }

    public void testSelectObject() throws IOException {

        String   stringValue        = null;
        Integer  integerValue       = null;
        Double[] arrayValue         = null;
        byte[]   byteArrayValue     = null;
        String   stringValueResult  = null;
        Integer  integerValueResult = null;
        Double[] arrayValueResult   = null;
        boolean  wasNull            = false;
        String   message            = "DB operation completed";

        try {
            String sqlString = "DROP TABLE TESTOBJECT IF EXISTS;"
                               + "CREATE CACHED TABLE TESTOBJECT ("
                               + "ID INTEGER NOT NULL IDENTITY, "
                               + "STOREDOBJECT OTHER, STOREDBIN BINARY )";

            sStatement.execute(sqlString);

            sqlString = "INSERT INTO TESTOBJECT "
                        + "(STOREDOBJECT, STOREDBIN) " + "VALUES (?,?)";

            PreparedStatement ps = cConnection.prepareStatement(sqlString);

            // initialise
            stringValue  = "Test String Value";
            integerValue = new Integer(1000);
            arrayValue   = new Double[] {
                new Double(1), new Double(Double.NaN),
                new Double(Double.NEGATIVE_INFINITY),
                new Double(Double.POSITIVE_INFINITY)
            };
            byteArrayValue = new byte[] {
                1, 2, 3
            };

            // String as Object
// fredt - in order to store Strings in OBJECT columns setObject should
// explicitly be called with a Types.OTHER type
            ps.setObject(1, stringValue, Types.OTHER);
            ps.setBytes(2, byteArrayValue);
            ps.execute();

            // Integer as Object
            ps.setObject(1, integerValue, Types.OTHER);
            ps.setBinaryStream(2, new ByteArrayInputStream(byteArrayValue),
                               byteArrayValue.length);
            ps.execute();

            // Array as object
            ps.setObject(1, arrayValue, Types.OTHER);

            // file as binary - works fine but file path and name has to be modified for test environment
            /*
            int length = (int) new File("c://ft/db.jar").length();
            FileInputStream fis = new FileInputStream("c://ft/db.jar");
            ps.setBinaryStream(2,fis,length);
            */
            ps.execute();

            ResultSet rs =
                sStatement.executeQuery("SELECT * FROM TESTOBJECT");
            boolean result = rs.next();

            // retrieving objects inserted into the third column
            stringValueResult = (String) rs.getObject(2);

            rs.next();

            integerValueResult = (Integer) rs.getObject(2);

            rs.next();

            arrayValueResult = (Double[]) rs.getObject(2);

            // cast objects to original types - will throw if type is wrong
            String   castStringValue      = (String) stringValueResult;
            Integer  castIntegerValue     = (Integer) integerValueResult;
            Double[] castDoubleArrayValue = (Double[]) arrayValueResult;

            for (int i = 0; i < arrayValue.length; i++) {
                if (!arrayValue[i].equals(arrayValueResult[i])) {
                    System.out.println("array mismatch: " + arrayValue[i]
                                       + " : " + arrayValueResult[i]);
                }
            }

            rs.close();
            ps.close();

            sqlString = "SELECT * FROM TESTOBJECT WHERE STOREDOBJECT = ?";
            ps        = cConnection.prepareStatement(sqlString);

            ps.setObject(1, new Integer(1000));

            rs = ps.executeQuery();

            rs.next();

            Object returnVal = rs.getObject(2);

            rs.next();
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }

        boolean success = stringValue.equals(stringValueResult)
                          && integerValue.equals(integerValueResult)
                          && java.util.Arrays.equals((Double[]) arrayValue,
                              (Double[]) arrayValueResult);

        assertEquals(true, success);
    }

    protected void tearDown() {

        try {
            cConnection.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("TestSql.tearDown() error: " + e.getMessage());
        }
    }

    public static void main(String[] argv) {

        TestResult result = new TestResult();
        TestCase   testC  = new TestSqlPersistent("testInsertObject");
        TestCase   testD  = new TestSqlPersistent("testSelectObject");

        testC.run(result);
        testD.run(result);
        System.out.println("TestSqlPersistent error count: "
                           + result.failureCount());
    }
}