我很难让图像显示在Tomcat中运行的JSP Web应用程序上。从添加MIME映射到更改context.xml文件以引用Webapp外部目录，我都尝试了所有方法。我还更改了目录所有权权限，但仍然没有得到预期的结果。文件路径值存储在数据库中。
此路径有效：/opt/tomcat/Harvester/Results/REQUESTID/REQUESTID_Image.FITS
此路径不是：/home/tomcat/harvester/results/REQUESTID/REQUESTID_Image.FITS
我已经确认文件存在，并且我不知道还需要配置什么才能显示第二个位置中引用的图像。
环境：
Requests.xhtml数据表有问题：
<p:dataTable id="RequestResults" var="RequestResult" value="#{Requests.allrequestresults}" selection="#{Requests.selectedrequestresults}" rowKey="#{RequestResult.id}" sortMode="multiple"
rows="10" paginator="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="5,10,15,20,50,100"
resizableColumns="true" liveResize="true"
draggableColumns="true"
style="margin-bottom:20px; table-layout:auto;"
>
<f:facet name="header">
Results
</f:facet>
<p:column selectionMode="multiple" style="width:16px;text-align:center"/>
<p:column headerText="Result ID" sortBy="#{RequestResult.id}" style="width: 200px">
<h:outputText value="#{RequestResult.id}" />
</p:column>
<p:column headerText="Request ID" sortBy="#{RequestResult.requestid}" style="width: 200px">
<h:outputText value="#{RequestResult.requestid}" />
</p:column>
<p:column headerText="File Name" sortBy="#{RequestResult.filename}" style="width: 200px">
<h:outputText value="#{RequestResult.filename}" />
</p:column>
<p:column headerText="Image" style="width: 100%">
<h:graphicImage id="image" name="results/#{RequestResult.imagename}" width="300" height="300"/>
<p:resizable for="image" animate="true" ghost="true"/>
</p:column>
</p:dataTable>
Requests.java
public void LoadRequestResults(){
MySqlDB mysqldb = new MySqlDB(); //Open and close of the connection and it's contents must be handled
ResultSet resultsRS = null;
allrequestresults = new ArrayList();
String RequestReviewList = "";
for(Request r : selectedrequests)
{
if(RequestReviewList.matches("")) RequestReviewList = "'" + r.getId() + "'";
else RequestReviewList += ",'" + r.getId() + "'";
}
try{
String query = String.format("Select id, requestid, filename from RESULTS where requestid in (%s) order by requestid",
RequestReviewList);
resultsRS = mysqldb.ExecuteDataTable(query);
while (resultsRS.next()) {
allrequestresults.add(new RequestResult(resultsRS.getInt("id"),
resultsRS.getInt("requestid"),
resultsRS.getString("filename"),
RequestResult.convertFITSToPNGString(new File(resultsRS.getString("filename")), config.TempDir)
));
}
}catch(IOException | SQLException e){
downloadmsg = "Failed to load.: " + e.toString();
}
finally{
try{
mysqldb.close((Connection)((Statement)resultsRS.getStatement()).getConnection(),(Statement)resultsRS.getStatement(),resultsRS);
}
catch(Exception e) {
}
}
try{Thread.sleep(2000);}catch(Exception e){} //Wait for the files to be recognized by the web site
}
RequestResult.java
public static String convertFITSToPNGString(File file, String tempfiledir){
String ReturnFileName = null;
try {
String TempFileName = file.getName().substring(0, file.getName().lastIndexOf(".")) + ".jpeg";
String TempFile = tempfiledir + TempFileName;
File f = new File(TempFile);
if(!f.exists())
{
Opener op = new Opener();
ImagePlus Imp = op.openImage(file.getPath());
FileSaver fileSaver = new FileSaver(Imp);
fileSaver.saveAsJpeg(TempFile);
}
ReturnFileName = TempFileName;
}catch(Exception e)
{
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, e.toString(), null));
//errorMSG = e.toString();
}
return ReturnFileName;
}
使用“ journalctl -xe -u tomcat的Tomcat日志”
Dec 31 22:30:51 server[4153]: Unsupported format or not found
Dec 31 22:30:51 server[4153]: Unsupported format or not found
Dec 31 22:30:51 server[4153]: Dec 31, 2019 10:30:51 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:51 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:51 server[4153]: Dec 31, 2019 10:30:51 PM com.sun.faces.application.resource.WebappResourceHelper findResource
Dec 31 22:30:51 server[4153]: WARNING: jsf.application.resource.unable_to_determine_resource_version.
Dec 31 22:30:51 server[4153]: Dec 31, 2019 10:30:51 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:51 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.application.resource.WebappResourceHelper findResource
Dec 31 22:30:53 server[4153]: WARNING: jsf.application.resource.unable_to_determine_resource_version.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.application.resource.WebappResourceHelper findResource
Dec 31 22:30:53 server[4153]: WARNING: jsf.application.resource.unable_to_determine_resource_version.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.application.resource.WebappResourceHelper findResource
Dec 31 22:30:53 server[4153]: WARNING: jsf.application.resource.unable_to_determine_resource_version.
Dec 31 22:30:53 server[4153]: Dec 31, 2019 10:30:53 PM com.sun.faces.context.ExternalContextImpl getMimeType
Dec 31 22:30:53 server[4153]: WARNING: JSF1091: No mime type could be found for file results/. To resolve this, add a mime-type mapping to the applications web.xml.
使用Google Chrome浏览器上的“检查”工具显示图像URL不完整：
<img id="form:RequestResults:0:image" src="/Website/javax.faces.resource/results/.xhtml" alt="" height="300" width="300">
我在使用tomcat托管的其他应用程序时发现了问题。我对系统执行更新后，必须已启用SELinux。
SELinux是Linux内核模块，它提供了一个框架，用于为系统上的许多资源配置强制性访问控制。
我禁用了SELINUX，然后重新引导了我的虚拟机（关闭了虚拟机，重新启动了VMware，打开了虚拟机）。
键入nano /etc/sysconfig/selinux并编辑要读取的文件：
#This file controls the state of SELinux on the system.
#SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced
# permissive - SELinux prints warnings instead of enforcing
# disabled - No SELinux policy is loaded
SELINUX = disabled
#SELINUXTYPE = can take one of these two values:
# targeted - Targeted processes are protected
# mls - Multi Level Security protection
SELINUXTYPE=targeted