Linux上的java JFreeChart没有X AWTError:无法连接到X11窗口服务器

Question

当我在VPS（虚拟专用服务器）中执行此代码时：

SortedSet<Integer> keys = new TreeSet<>(map.keySet());
DefaultCategoryDataset dateset = new DefaultCategoryDataset();
for (Integer hour : keys) {
    dateset.addValue(map.get(hour), "", hour);
}
JFreeChart chart = ChartFactory.createLineChart("Channel: ",
        "Hour", "Person", dateset, PlotOrientation.VERTICAL, false, false, false);
int width = 600; /* Width of the image */

int height = 480; /* Height of the image */

File lineChart = new File(channel_id + "_Chart.jpeg");
try {
    ChartUtilities.saveChartAsJPEG(lineChart, chart, width, height);
} catch (IOException ex) {
    App.sendLogger(ActivityCharts.class, "Error...
}

my xshell显示此错误：

Failed to execute Xmanager:

以及：

Exception in thread "pool-2-thread-2" java.awt.AWTError: Can't connect to X11 window server using 'localhost:10.0' as the value of the DISPLAY variable.

一致：

JFreeChart chart = ChartFactory.createLineChart("Channel: ",
        "Hour", "Person", dateset, PlotOrientation.VERTICAL, false, false, false);

但当我在电脑上启动这个程序时，一切都正常