Example usage for java.sql PreparedStatement setCharacterStream

Introduction

In this page you can find the example usage for java.sql PreparedStatement setCharacterStream.

Prototype

void setCharacterStream(int parameterIndex, java.io.Reader reader) throws SQLException;

Source Link

Document

Sets the designated parameter to the given Reader object.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection con = DriverManager.getConnection("jdbc:h2:mem:");
    Statement s = con.createStatement();
    s.execute("CREATE TABLE Table1 (Column1 CLOB)");

    InputStream is = new FileInputStream("data.txt");
    Reader rdr = new InputStreamReader(is, StandardCharsets.ISO_8859_1);
    PreparedStatement ps = con.prepareStatement("INSERT INTO Table1 (Column1) VALUES (?)");
    ps.setCharacterStream(1, rdr);
    ps.executeUpdate();/*from   w ww .j ava 2 s  .  c  om*/

    ResultSet rs = s.executeQuery("SELECT Column1 FROM Table1");
    int rowNumber = 0;
    while (rs.next()) {
        String str = rs.getString("Column1");
        System.out.println(String.format("Row %d: CLOB is %d character(s) long.", ++rowNumber, str.length()));
    }
    rs.close();
    con.close();
}

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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 CLOB);");

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

    File file = new File("c:/Java_Dev/data.txt");

    FileReader reader = new FileReader(file);
    pstmt.setCharacterStream(1, reader);

    pstmt.execute();//from w w  w  . j  a  va2 s .  co m

    ResultSet resultSet = pstmt.executeQuery("select b from survey ");

    File data = new File("C:\\a.txt");
    Reader dataReader = resultSet.getCharacterStream(1);
    FileWriter writer = new FileWriter(data);
    char[] buffer = new char[1];
    while (dataReader.read(buffer) > 0) {
        writer.write(buffer);
    }
    writer.close();

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

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From source file:com.feedzai.commons.sql.abstraction.engine.impl.H2Engine.java

@Override
protected int entityToPreparedStatement(final DbEntity entity, final PreparedStatement ps,
        final EntityEntry entry, final boolean useAutoInc) throws DatabaseEngineException {

    int i = 1;//from  w  w w . ja  va 2s.c om
    for (DbColumn column : entity.getColumns()) {
        if ((column.isAutoInc() && useAutoInc)) {
            continue;
        }

        try {
            final Object val;
            if (column.isDefaultValueSet() && !entry.containsKey(column.getName())) {
                val = column.getDefaultValue().getConstant();
            } else {
                val = entry.get(column.getName());
            }

            switch (column.getDbColumnType()) {
            case BLOB:
                ps.setBytes(i, objectToArray(val));

                break;
            case CLOB:
                if (val == null) {
                    ps.setNull(i, Types.CLOB);
                    break;
                }

                if (val instanceof String) {
                    StringReader sr = new StringReader((String) val);
                    ps.setCharacterStream(i, sr);
                } else {
                    throw new DatabaseEngineException("Cannot convert " + val.getClass().getSimpleName()
                            + " to String. CLOB columns only accept Strings.");
                }
                break;
            default:
                ps.setObject(i, val);
            }
        } catch (Exception ex) {
            throw new DatabaseEngineException("Error while mapping variables to database", ex);
        }

        i++;
    }

    return i - 1;
}

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From source file:no.polaric.aprsdb.MyDBSession.java

public long addFileObject(InputStream data) throws java.sql.SQLException {
    PreparedStatement stmt = getCon()
            .prepareStatement(" INSERT INTO \"FileObject\" (data)" + " VALUES (?) RETURNING id");
    stmt.setCharacterStream(1, new InputStreamReader(data));
    ResultSet rs = stmt.executeQuery();
    rs.next();//from  www.ja  v  a 2  s.co m
    return rs.getLong("id");
}

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From source file:nz.co.gregs.dbvolution.actions.DBUpdateLargeObjects.java

private void setUsingCharacterStream(DBDefinition defn, DBRow row, final String col,
        final DBLargeObject largeObject, DBDatabase db, DBStatement statement) throws SQLException {
    String sqlString = defn.beginUpdateLine() + defn.formatTableName(row) + defn.beginSetClause()
            + defn.formatColumnName(col) + defn.getEqualsComparator() + defn.getPreparedVariableSymbol()
            + defn.beginWhereClause() + defn.formatColumnName(row.getPrimaryKeyColumnName())
            + defn.getEqualsComparator() + row.getPrimaryKey().toSQLString(db) + defn.endSQLStatement();
    //               db.printSQLIfRequested(sqlString);
    log.info(sqlString);// ww  w .  j  ava 2  s. c o  m
    PreparedStatement prep = statement.getConnection().prepareStatement(sqlString);
    try {
        prep.setCharacterStream(1, new InputStreamReader(largeObject.getInputStream()));
        prep.execute();
    } finally {
        prep.close();
    }
}

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From source file:org.batoo.jpa.jdbc.dbutils.QueryRunner.java

/**
 * Fill the <code>PreparedStatement</code> replacement parameters with the given objects.
 * //from   w  w  w .  j  a v a  2 s  . c  o  m
 * @param statement
 *            PreparedStatement to fill
 * @param params
 *            Query replacement parameters; <code>null</code> is a valid value to pass in.
 * @throws SQLException
 *             if a database access error occurs
 */
private void fillStatement(PreparedStatement statement, Object... params) throws SQLException {
    // use local variable for performance
    boolean pmdKnownBroken = this.pmdKnownBroken;
    ParameterMetaData pmd = this.pmd;
    final boolean hasLob = this.hasLob;

    if (pmdKnownBroken) {
        ((PreparedStatementProxy) statement).setParamCount(params.length);
    } else {
        ((PreparedStatementProxy) statement).setParamCount(-1);
    }

    // if the jdbc adaptor wants to modify the parameters we let it do it its own way
    final JdbcAdaptor jdbcAdaptor = this.jdbcAdaptor;
    if ((jdbcAdaptor != null) && jdbcAdaptor.modifiesParameters()) {
        pmd = this.pmd = statement.getParameterMetaData();

        jdbcAdaptor.modifyParameters(pmd, params);
    }

    for (int i = 0; i < params.length; i++) {
        final Object param = params[i];
        if ((param != null) && (param != Void.TYPE)) {
            if (hasLob && (param instanceof Clob)) {
                if (this.jdbcAdaptor instanceof OracleAdaptor) {
                    statement.setCharacterStream(i + 1, ((Clob) param).getCharacterStream());
                } else {
                    statement.setClob(i + 1, (Clob) param);
                }
            } else if (hasLob && (param instanceof Blob)) {
                if (this.jdbcAdaptor instanceof OracleAdaptor) {
                    statement.setBinaryStream(i + 1, ((Blob) param).getBinaryStream());
                } else {
                    statement.setBlob(i + 1, (Blob) param);
                }
            } else {
                statement.setObject(i + 1, param);
            }
        } else {
            if (!pmdKnownBroken && (pmd == null)) {
                pmd = this.pmd = statement.getParameterMetaData();
            }

            // VARCHAR works with many drivers regardless of the actual column type.
            // Oddly, NULL and OTHER don't work with Oracle's drivers.
            int sqlType = Types.VARCHAR;
            if (!pmdKnownBroken) {
                try {
                    sqlType = pmd.getParameterType(i + 1);
                } catch (final SQLException e) {
                    pmdKnownBroken = this.pmdKnownBroken = true;
                }
            }
            if (param != Void.TYPE) {
                statement.setNull(i + 1, sqlType);
            }
        }
    }
}

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