$.SayHiImage.java Source code

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Here is the source code for $.SayHiImage.java

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    /*
     * Copyright (c) 2002-2012 Alibaba Group Holding Limited.
     * All rights reserved.
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     *    http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     */

package ${package}.app1.module.screen.simple;

    import static com.alibaba.citrus.util.ObjectUtil.*;
    import static com.alibaba.citrus.util.StringEscapeUtil.*;
    import static org.apache.commons.lang.StringUtils.*;

    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.io.IOException;
    import java.io.OutputStream;
    import javax.imageio.ImageIO;
    import javax.servlet.http.HttpServletResponse;

    import com.alibaba.citrus.service.requestcontext.buffered.BufferedRequestContext;
    import com.alibaba.citrus.turbine.dataresolver.Param;
    import org.springframework.beans.factory.annotation.Autowired;

    /**
     * ?
     *
     * @author Michael Zhou
     */
    public class SayHiImage {
        @Autowired
        private HttpServletResponse response;

        @Autowired
        private BufferedRequestContext brc;

        public void execute() throws Exception {
            // ?buffering
            brc.setBuffering(false);

            // ??content type?
            // HTML?JSON?JavaScript?JPG?PDF?EXCEL
            response.setContentType("image/jpeg");

            OutputStream out = response.getOutputStream();

            writeImage(out);
        }

        private void writeImage(OutputStream out) throws IOException {
            BufferedImage img = new BufferedImage(800, 600, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2d = img.createGraphics();

            g2d.setPaint(Color.red);
            g2d.setFont(new Font("Serif", Font.BOLD, 36));
            g2d.drawString("Hi there, how are you doing today?", 5, g2d.getFontMetrics().getHeight());
            g2d.dispose();

            ImageIO.write(img, "jpg", out);
        }
    }