一群面人，这么个问题都没人回答

yycathryn 2002-03-15 10:18:33

网上下载了一个生成Jpeg图片的Servlet，
生成的图片中包含中文。
不能正确显示中文，只要是中文统统显示乱码。
用resin发布的。

已经反编译了取得源码，然后重新编译，仍然不行。

package com.objectplanet.chart;

import com.objectplanet.chart.jpeg.JpegEncoder;
import java.awt.*;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.StringTokenizer;
import javax.servlet.*;

// Referenced classes of package com.objectplanet.chart:
// ChartApplet, Chart, BarChartApplet, LineChartApplet,
// PieChartApplet

public class ChartServlet extends GenericServlet
{

public String encodeChartImage(Image image, OutputStream outputstream)
throws IOException
{
if(image != null && outputstream != null)
{
JpegEncoder jpegencoder = new JpegEncoder(image, 75, outputstream);
jpegencoder.Compress();
outputstream.flush();
}
return "image/jpeg";
}

public ChartServlet()
{
}

private final boolean hasValidLicense()
{
return true;
}

protected static Double[] getDoubleValues(String s)
{
Double adouble[] = null;
if(s != null && !s.equals(""))
{
StringTokenizer stringtokenizer = new StringTokenizer(s, ",");
adouble = new Double[stringtokenizer.countTokens()];
for(int i = 0; i < adouble.length; i++)
try
{
adouble[i] = new Double(stringtokenizer.nextToken());
}
catch(NumberFormatException _ex) { }

}
return adouble;
}

public synchronized void service(ServletRequest servletrequest, ServletResponse servletresponse)
throws ServletException, IOException
{
Object obj = null;
String s = servletrequest.getParameter("chart");
s = s == null ? "bar" : s;
if(s.equals("bar"))
obj = barChart;
else
if(s.equals("line"))
obj = lineChart;
else
if(s.equals("pie"))
obj = pieChart;
if(obj == null)
return;
((ChartApplet) (obj)).theChart.setSize(300, 200);
((ChartApplet) (obj)).reset();
((ChartApplet) (obj)).setParameter("seriesCount", servletrequest.getParameter("seriesCount"));
String s1 = servletrequest.getParameter("sampleCount");
if(s1 == null || s1.trim().length() == 0)
{
Double adouble[] = getDoubleValues(servletrequest.getParameter("sampleValues"));
int i = adouble == null ? 0 : adouble.length;
int j = ((ChartApplet) (obj)).theChart.getSeriesCount();
for(int k = 0; k < j; k++)
{
Double adouble1[] = getDoubleValues(servletrequest.getParameter("sampleValues_" + k));
i = adouble1 == null ? i : Math.max(i, adouble1.length);
}

((ChartApplet) (obj)).setParameter("sampleCount", i + "");
} else
{
((ChartApplet) (obj)).setParameter("sampleCount", s1);
}
String s2;
String s3;
for(Enumeration enumeration = servletrequest.getParameterNames(); enumeration.hasMoreElements(); ((ChartApplet) (obj)).setParameter(s2, s3))
{
s2 = (String)enumeration.nextElement();
s3 = servletrequest.getParameter(s2);
}

((ChartApplet) (obj)).setParameter("rangeStep", servletrequest.getParameter("rangeStep"));
((ChartApplet) (obj)).setParameter("range", servletrequest.getParameter("range"));
((ChartApplet) (obj)).setParameter("lowerRange", servletrequest.getParameter("lowerRange"));
((ChartApplet) (obj)).setParameter("rangeStep_2", servletrequest.getParameter("rangeStep_2"));
((ChartApplet) (obj)).setParameter("range_2", servletrequest.getParameter("range_2"));
((ChartApplet) (obj)).setParameter("lowerRange_2", servletrequest.getParameter("lowerRange_2"));
Dimension dimension = ((ChartApplet) (obj)).theChart.getSize();
Image image = ((ChartApplet) (obj)).theChart.getImage(dimension.width, dimension.height);
if(!hasValidLicense())
{
Graphics g = image.getGraphics();
g.setColor(Color.white);
g.fillRect(0, dimension.height - 8, dimension.width, 8);
g.setColor(Color.gray);
g.setFont(new Font("Arial", 0, 9));
g.drawString("www.objectplanet.com www.objectplanet.com www.objectplanet.com www.objectplanet.com www.objectplanet.com", 0, dimension.height - 2);
}

String s4 = encodeChartImage(image,servletresponse.getOutputStream());
if(s4 != null && s4.length() > 0)
{

servletresponse.setContentType(s4);
}
else
{
servletresponse.setContentType("image");
}
}

public void init(ServletConfig servletconfig)
{
try
{
super.init(servletconfig);
}
catch(ServletException _ex) { }
barChart = new BarChartApplet();
lineChart = new LineChartApplet();
pieChart = new PieChartApplet();
barChart.init();
lineChart.init();
pieChart.init();
}

protected BarChartApplet barChart;
protected LineChartApplet lineChart;
protected PieChartApplet pieChart;
}

...全文