ираюсь использовать подпись тега PrimeFaces на своем сайте, но я не знаю, как я могу сохранить в виде изображения в моей базе данных или, если возможно, любого другого типа. я просто хочу отобразить его позже в таблице данных, чтобы администратор мог управлять и проверять подлинность этих подписей.

это моя страница в формате xhtml.

<h:form>
    <p:growl autoUpdate="true" />

    <p:signature style="width:400px;height:200px" widgetVar="sig" value="#{cardBean.card.signature}" required="true" label="Signature" guideline="true"/>

    <div style="margin:20px 0">
        <p:commandButton value="Submit" icon="ui-icon-check" update="output"/>
        <p:commandButton value="Clear" icon="ui-icon-close" type="button" onclick="PF('sig').clear()"/>
    </div>

    <p:outputPanel id="output">
        <h:outputText rendered="#{not empty cardBean.card.signature}" style="font-size:24px;display:block" value="Your Signature" />
        <p:signature style="width:400px;height:200px;" value="#{cardBean.card.signature}" readonly="true"
                     rendered="#{not empty cardBean.card.signature}" backgroundColor="#eaeaea" color="#03a9f4"/>
    </p:outputPanel>

<p:commandButton value="Soumettre"
                        action="#{cardBean.doAjouterSignature()}" update="@all" />
</h:form>

и это мой журнал

14:12:47,711 INFO  [org.jboss.modules] (main) JBoss Modules version 1.3.3.Final
14:12:48,114 INFO  [org.jboss.msc] (main) JBoss MSC version 1.2.2.Final
14:12:48,180 INFO  [org.jboss.as] (MSC service thread 1-6) JBAS015899: WildFly 8.1.0.Final "Kenny" starting
14:12:51,394 INFO  [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) JBAS015003: Found ebankingJSF.war in deployment directory. To trigger deployment create a file called ebankingJSF.war.dodeploy
14:12:51,412 INFO  [org.jboss.as.server] (Controller Boot Thread) JBAS015888: Creating http management service using socket-binding (management-http)
14:12:51,440 INFO  [org.xnio] (MSC service thread 1-7) XNIO version 3.2.2.Final
14:12:51,447 INFO  [org.xnio.nio] (MSC service thread 1-7) XNIO NIO Implementation Version 3.2.2.Final
14:12:51,475 INFO  [org.jboss.as.security] (ServerService Thread Pool -- 45) JBAS013171: Activating Security Subsystem
14:12:51,479 WARN  [org.jboss.as.txn] (ServerService Thread Pool -- 46) JBAS010153: Node identifier property is set to the default value. Please make sure it is unique.
14:12:51,481 INFO  [org.jboss.as.naming] (ServerService Thread Pool -- 40) JBAS011800: Activating Naming Subsystem
14:12:51,485 INFO  [org.jboss.as.security] (MSC service thread 1-12) JBAS013170: Current PicketBox version=4.0.21.Beta1
14:12:51,490 INFO  [org.jboss.as.webservices] (ServerService Thread Pool -- 48) JBAS015537: Activating WebServices Extension
14:12:51,494 INFO  [org.jboss.as.jsf] (ServerService Thread Pool -- 38) JBAS012615: Activated the following JSF Implementations: [main]
14:12:51,495 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 32) JBAS010280: Activating Infinispan subsystem.
14:12:51,499 INFO  [org.wildfly.extension.io] (ServerService Thread Pool -- 31) WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors
14:12:51,508 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-1) JBAS017502: Undertow 1.0.15.Final starting
14:12:51,509 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017502: Undertow 1.0.15.Final starting
14:12:51,521 INFO  [org.jboss.as.connector.logging] (MSC service thread 1-4) JBAS010408: Starting JCA Subsystem (IronJacamar 1.1.5.Final)
14:12:51,548 INFO  [org.jboss.as.naming] (MSC service thread 1-12) JBAS011802: Starting Naming Service
14:12:51,550 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-14) JBAS015400: Bound mail session [java:jboss/mail/Default]
14:12:51,600 INFO  [org.jboss.remoting] (MSC service thread 1-13) JBoss Remoting version 4.0.3.Final
14:12:51,600 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010403: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)
14:12:51,607 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-9) JBAS010417: Started Driver service with driver-name = h2
14:12:51,619 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010404: Deploying non-JDBC-compliant driver class com.mysql.jdbc.Driver (version 5.1)
14:12:51,620 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-1) JBAS010417: Started Driver service with driver-name = mysql
14:12:51,656 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017527: Creating file handler for path C:\Users\Ali\Desktop\serveurWildFly\wildfly-8.1.0.Final/welcome-content
14:12:51,670 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-15) JBAS017525: Started server default-server.
14:12:51,686 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-2) JBAS017531: Host default-host starting
14:12:51,750 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-1) JBAS010400: Bound data source [java:/ebanking]
14:12:51,752 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-16) JBAS010400: Bound data source [java:/exam]
14:12:51,763 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-9) JBAS017519: Undertow HTTP listener default listening on localhost/127.0.0.1:8383
14:12:51,827 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-12) JBAS010400: Bound data source [java:jboss/datasources/ExampleDS]
14:12:51,911 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-15) JBAS015012: Started FileSystemDeploymentService for directory C:\Users\Ali\Desktop\serveurWildFly\wildfly-8.1.0.Final\standalone\deployments
14:12:51,913 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015876: Starting deployment of "ebankingJSF.war" (runtime-name: "ebankingJSF.war")
14:12:52,136 INFO  [org.jboss.ws.common.management] (MSC service thread 1-9) JBWS022052: Starting JBoss Web Services - Stack CXF Server 4.2.4.Final
14:12:54,556 INFO  [org.jboss.as.jpa] (MSC service thread 1-4) JBAS011401: Read persistence.xml for ebankingEJB
14:12:54,862 INFO  [org.jboss.as.jpa] (ServerService Thread Pool -- 50) JBAS011409: Starting Persistence Unit (phase 1 of 2) Service 'ebankingJSF.war#ebankingEJB'
14:12:54,869 INFO  [org.hibernate.jpa.internal.util.LogHelper] (ServerService Thread Pool -- 50) HHH000204: Processing PersistenceUnitInfo [
    name: ebankingEJB
    ...]
14:12:54,922 INFO  [org.hibernate.Version] (ServerService Thread Pool -- 50) HHH000412: Hibernate Core {4.3.5.Final}
14:12:54,924 INFO  [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 50) HHH000206: hibernate.properties not found
14:12:54,926 INFO  [org.hibernate.cfg.Environment] (ServerService Thread Pool -- 50) HHH000021: Bytecode provider name : javassist
14:12:55,045 INFO  [org.jboss.weld.deployer] (MSC service thread 1-3) JBAS016002: Processing weld deployment ebankingJSF.war
14:12:55,180 INFO  [org.hibernate.validator.internal.util.Version] (MSC service thread 1-3) HV000001: Hibernate Validator 5.1.0.Final
14:12:55,237 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named GestionCards in deployment unit deployment "ebankingJSF.war" are as follows:

    java:global/ebankingJSF/GestionCards!services.GestionCardsLocal
    java:app/ebankingJSF/GestionCards!services.GestionCardsLocal
    java:module/GestionCards!services.GestionCardsLocal
    java:global/ebankingJSF/GestionCards
    java:app/ebankingJSF/GestionCards
    java:module/GestionCards

14:12:55,238 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named GestionClient in deployment unit deployment "ebankingJSF.war" are as follows:

    java:global/ebankingJSF/GestionClient!services.GestionClientRemote
    java:app/ebankingJSF/GestionClient!services.GestionClientRemote
    java:module/GestionClient!services.GestionClientRemote
    java:jboss/exported/ebankingJSF/GestionClient!services.GestionClientRemote
    java:global/ebankingJSF/GestionClient!services.GestionClientLocal
    java:app/ebankingJSF/GestionClient!services.GestionClientLocal
    java:module/GestionClient!services.GestionClientLocal

14:12:55,238 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named GestionAccounts in deployment unit deployment "ebankingJSF.war" are as follows:

    java:global/ebankingJSF/GestionAccounts!services.GestionAccountsLocal
    java:app/ebankingJSF/GestionAccounts!services.GestionAccountsLocal
    java:module/GestionAccounts!services.GestionAccountsLocal
    java:global/ebankingJSF/GestionAccounts!services.GestionAccountsRemote
    java:app/ebankingJSF/GestionAccounts!services.GestionAccountsRemote
    java:module/GestionAccounts!services.GestionAccountsRemote
    java:jboss/exported/ebankingJSF/GestionAccounts!services.GestionAccountsRemote

14:12:55,239 INFO  [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named GestionTransactions in deployment unit deployment "ebankingJSF.war" are as follows:

    java:global/ebankingJSF/GestionTransactions!services.GestionTransactionsLocal
    java:app/ebankingJSF/GestionTransactions!services.GestionTransactionsLocal
    java:module/GestionTransactions!services.GestionTransactionsLocal
    java:global/ebankingJSF/GestionTransactions
    java:app/ebankingJSF/GestionTransactions
    java:module/GestionTransactions

14:12:55,512 INFO  [org.jboss.weld.deployer] (MSC service thread 1-15) JBAS016005: Starting Services for CDI deployment: ebankingJSF.war
14:12:55,537 INFO  [org.jboss.weld.Version] (MSC service thread 1-15) WELD-000900: 2.1.2 (Final)
14:12:55,567 INFO  [org.jboss.weld.deployer] (MSC service thread 1-11) JBAS016008: Starting weld service for deployment ebankingJSF.war
14:12:55,674 INFO  [org.jboss.as.jpa] (ServerService Thread Pool -- 50) JBAS011409: Starting Persistence Unit (phase 2 of 2) Service 'ebankingJSF.war#ebankingEJB'
14:12:55,734 INFO  [org.hibernate.annotations.common.Version] (ServerService Thread Pool -- 50) HCANN000001: Hibernate Commons Annotations {4.0.4.Final}
14:12:56,098 INFO  [org.hibernate.dialect.Dialect] (ServerService Thread Pool -- 50) HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
14:12:56,237 INFO  [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (ServerService Thread Pool -- 50) HHH000397: Using ASTQueryTranslatorFactory
14:12:56,534 INFO  [org.hibernate.tool.hbm2ddl.SchemaU,pdate] (ServerService Thread Pool -- 50) HHH000228: Running hbm2ddl schema update
14:12:56,534 INFO  [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 50) HHH000102: Fetching database metadata
14:12:56,537 INFO  [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 50) HHH000396: Updating schema
14:12:56,755 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000261: Table found: banque.card_request
14:12:56,755 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000037: Columns: [id, letter, client_id, type, agence, intitule]
14:12:56,755 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000108: Foreign keys: [fk_lcmgyotmshaveq7jopygkpkbr]
14:12:56,755 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000126: Indexes: [primary, fk_lcmgyotmshaveq7jopygkpkbr]
14:12:56,795 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000261: Table found: banque.t_account
14:12:56,795 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000037: Columns: [id, solde, date_creation, min_amount, client_id, type, max_amount, iban]
14:12:56,795 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000108: Foreign keys: [fk_10y3sqkbms3tmyv69xp9qs9nv]
14:12:56,795 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000126: Indexes: [primary, fk_10y3sqkbms3tmyv69xp9qs9nv]
14:12:56,870 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000261: Table found: banque.t_client
14:12:56,871 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000037: Columns: [id, first_name, pwd, last_name, login]
14:12:56,871 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000108: Foreign keys: []
14:12:56,871 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000126: Indexes: [primary]
14:12:56,907 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000261: Table found: banque.t_question
14:12:56,907 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000037: Columns: [produit, id, text, client_id, contact]
14:12:56,907 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000108: Foreign keys: [fk_i7v6miypxgh04j9htf2hiks6k]
14:12:56,907 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000126: Indexes: [primary, fk_i7v6miypxgh04j9htf2hiks6k]
14:12:56,931 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000261: Table found: banque.t_transaction
14:12:56,931 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000037: Columns: [id, date_creation, account_id, status, transaction_type, credit]
14:12:56,931 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000108: Foreign keys: [fk_f9wd4bufpvgj1xr7p8h7vn9h8]
14:12:56,931 INFO  [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 50) HHH000126: Indexes: [fk_f9wd4bufpvgj1xr7p8h7vn9h8, primary]
14:12:56,932 INFO  [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 50) HHH000232: Schema update complete
14:12:57,866 INFO  [javax.enterprise.resource.webcontainer.jsf.config] (MSC service thread 1-14) Initializing Mojarra 2.2.6-jbossorg-4 20140501-1134 for context '/ebankingJSF'
14:13:02,980 INFO  [org.primefaces.webapp.PostConstructApplicationEventListener] (MSC service thread 1-14) Running on PrimeFaces 5.2
14:13:02,991 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-14) JBAS017534: Registered web context: /ebankingJSF
14:13:03,030 INFO  [org.jboss.as.server] (ServerService Thread Pool -- 28) JBAS018559: Deployed "ebankingJSF.war" (runtime-name : "ebankingJSF.war")
14:13:03,129 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on http://127.0.0.1:9997/management
14:13:03,129 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9997
14:13:03,129 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.1.0.Final "Kenny" started in 16007ms - Started 391 of 444 services (92 services are lazy, passive or on-demand)