动态Jfreechart
我有一个问题，让primefaces动态图像工作。我认为我正在完成与primefaces展示中的示例完全相同但图像未加载到页面上。我的托管bean看起来如下。
@ManagedBean(name = "statisticsBean")
@NoneScoped
public class StatisticsBean {
private WMCUser user;
private BasicGroup group;
private List<GameProgressStatistics> lineChartStats;
private List<UserStatistics> userStatistics;
private static final Logger logger = Logger.getLogger(StatisticsBean.class.getName());
public StatisticsBean() {
...
createUserStatistics();
}
private void createUserStatistics() {
List<WMCUser> users = GroupHelper.getNonDeletedMembers(group);
for (WMCUser wmcUser : users) {
userStatistics.add(new UserStatistics(
wmcUser.getStatUser().getMakeCount(),
wmcUser.getStatUser().getGamesPlayed(),
wmcUser.getFirstName(),
wmcUser.getLastName()));
}
}
public class UserStatistics {
private int makeCount;
private int gameCount;
private String firstName;
private String lastName;
private StreamedContent thermoChart;
public UserStatistics(int makeCount, int gameCount, String firstName, String lastName) {
this.makeCount = makeCount;
this.gameCount = gameCount;
this.firstName = firstName;
this.lastName = lastName;
try {
ThermometerPlot plot = new ThermometerPlot(createThermometerDataset());
File chartFile = new File("dynamichart");
JFreeChart chart = new JFreeChart(plot);
ChartUtilities.saveChartAsPNG(chartFile, chart, 50, 50);
thermoChart = new DefaultStreamedContent(new FileInputStream(chartFile), "image/png");
} catch (Exception e) {
logger.severe(e.getMessage());
}
.....
}
.....
}
<h:form id="stats">
<p:dataTable id="statsTable" var="user" value="#{statisticsBean.userStatistics}">
<p:column styleClass="textColumn">
<f:facet name="header">
<h:outputText value="Name" />
</f:facet>
<h:outputText value="#{user.firstName} #{user.lastName}"/>
</p:column>
...
<p:column styleClass="imageColumn">
<f:facet name="header">
<h:outputText value="Luck Barometer"/>
</f:facet>
<p:graphicImage value="#{user.thermoChart}"/>
</p:column>
</p:dataTable>
</h:form>
没有找到相关结果
已邀请:
2 个回复
熊融炭臀陛
师埠女
try { ThermometerPlot plot = new ThermometerPlot(createThermometerDataset()); ByteArrayOutputStream baos = new ByteArrayOutputStream(); JFreeChart chart = new JFreeChart(plot); ChartUtilities.writeChartAsPNG(baos, chart, 50, 50); thermoChart = new DefaultStreamedContent( new ByteArrayInputStream(baos.toByteArray()), "image/png"); } catch (Exception e) { logger.severe(e.getMessage()); }