JSF文件上传功能
2007-10-21 22:24
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最近项目需要用jsf1.2实现文件上传功能，我没有采用myfaces，而是用Apache MyFaces Trinidad 这个实现的文件上传，实现方法和myfaces是一样的。页面采用的是.xhtml。
Apache MyFaces Trinidad是一个基于部分Oracle's ADF Faces构建的JSF1.2组件库。我们要先下在它的jar包，然后导入到我们工程里面。http://myfaces.apache.org/trinidad/index.html这个链接里有文档和包的下载。
下面来看看代码，首先要配置web.xml文件，配置文件里的UPLOAD_MAX_MEMORY设置成500k说明只要是小于500k的文件都会存放在memory里面，UPLOAD_MAX_DISK_SPACE设置成5000k说明上传文件最大为5000k，并且大小在500k和5000k之间的文件才会存放在磁盘默认路径里面，UPLOAD_TEMP_DIR用来设置存放文件的路径
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<!-- Maximum memory per request (in bytes) -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_MAX_MEMORY</param-name>
<!-- Use 500K -->
<param-value>512000</param-value>
</context-param>
<context-param>
<!-- Maximum disk space per request (in bytes) -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_MAX_DISK_SPACE</param-name>
<!-- Use 5,000K -->
<param-value>5120000</param-value>
</context-param>
<context-param>
<!-- directory to store temporary files -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_TEMP_DIR</param-name>
<!-- Use a TrinidadUploads subdirectory of /tmp -->
<param-value>/tmp/TrinidadUploads/</param-value>
</context-param>
<!-- This filter is always required; one of its functions is
file upload. -->
<filter>
<filter-name>trinidad</filter-name>
<filter-class>org.apache.myfaces.trinidad.webapp.TrinidadFilter</filter-class>
</filter>
</web-app>
然后是faces-config.xml的配置信息
<?xml version='1.0' encoding='UTF-8'?>
<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd"
version="1.2">
<!-- upload files by lw -->
<navigation-rule>
<from-view-id>/upload/upload.xhtml</from-view-id>
<navigation-case>
<from-outcome>uploadedfile</from-outcome>
<to-view-id>/upload/uploadlist.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
<managed-bean>
<managed-bean-name>upLoadBean</managed-bean-name>
<managed-bean-class>
com.lw.bean.UpLoadBean
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
UpLoadBean类
package com.lw.bean;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import org.apache.myfaces.trinidad.model.UploadedFile;
public class UpLoadBean ...{
private UploadedFile file;
public UploadedFile getFile() ...{
return file;
}
public void setFile(UploadedFile file) ...{
this.file = file;
}
public String uploadedfile() ...{
try ...{
FacesContext context = FacesContext.getCurrentInstance();
//在控制台输出上传文件的文件名，和文件大小
FacesMessage message = new FacesMessage(
"Successfully uploaded file" + file.getFilename() + "("
+ file.getLength() + "bytes)");
context.addMessage(null, message);
InputStream stream;
stream = new BufferedInputStream(file.getInputStream());
byte[] bytes = new byte[1024 * 1024];//设定文件大小
@SuppressWarnings("unused")
int count;
count = stream.read(bytes);
stream.close();//关闭流
return "uploadedfile";
} catch (IOException e) ...{
e.printStackTrace();
return null;
}
}
}
上传页面upload.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:u="http://java.sun.com/blueprints/ui"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:tr="http://myfaces.apache.org/trinidad" xml:lang="en" lang="en">
<head>
<title>My Facelets Page</title>
<meta http-equiv="keywords" content="enter,your,keywords,here" />
<meta http-equiv="description"
content="A short description of this page." />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<!--<link rel="stylesheet" type="text/css" href="styles.css">-->
<script>
</script>
</head>
<body>
<f:view>
<tr:form usesUpload="true">
<tr:inputFile label="上传:" value="#{upLoadBean.file}" />
<tr:commandButton text="开始" action="#{upLoadBean.uploadedfile}" />
</tr:form>
</f:view>
</body>
</html>
显示上传文件的文件名和文件大小的页面uploadlist.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<head>
<title>My Facelets Page</title>
<meta http-equiv="keywords" content="enter,your,keywords,here" />
<meta http-equiv="description"
content="A short description of this page." />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<!--<link rel="stylesheet" type="text/css" href="styles.css">-->
</head>
<body>
<f:view>
<h:panelGrid border="0" columns="2" style="width: 411px">
<h:outputText value="文件名：" />
<h:outputText value="#{upLoadBean.file.filename}" />
<h:outputText value="文件大小：" />
<h:outputText value="#{upLoadBean.file.length}" />
</h:panelGrid>
</f:view>
</body>
</html>
现在功能已经实现了，不过这个程序上传的文件成功后，会把文件变成tmp文件，不过我需要的功能已经实现了，因为我上传的是excel和work文件，然后用POI解析tmp文件，把它存入数据库就可以了。
Apache MyFaces Trinidad是一个基于部分Oracle's ADF Faces构建的JSF1.2组件库。我们要先下在它的jar包，然后导入到我们工程里面。http://myfaces.apache.org/trinidad/index.html这个链接里有文档和包的下载。
下面来看看代码，首先要配置web.xml文件，配置文件里的UPLOAD_MAX_MEMORY设置成500k说明只要是小于500k的文件都会存放在memory里面，UPLOAD_MAX_DISK_SPACE设置成5000k说明上传文件最大为5000k，并且大小在500k和5000k之间的文件才会存放在磁盘默认路径里面，UPLOAD_TEMP_DIR用来设置存放文件的路径
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<!-- Maximum memory per request (in bytes) -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_MAX_MEMORY</param-name>
<!-- Use 500K -->
<param-value>512000</param-value>
</context-param>
<context-param>
<!-- Maximum disk space per request (in bytes) -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_MAX_DISK_SPACE</param-name>
<!-- Use 5,000K -->
<param-value>5120000</param-value>
</context-param>
<context-param>
<!-- directory to store temporary files -->
<param-name>org.apache.myfaces.trinidad.UPLOAD_TEMP_DIR</param-name>
<!-- Use a TrinidadUploads subdirectory of /tmp -->
<param-value>/tmp/TrinidadUploads/</param-value>
</context-param>
<!-- This filter is always required; one of its functions is
file upload. -->
<filter>
<filter-name>trinidad</filter-name>
<filter-class>org.apache.myfaces.trinidad.webapp.TrinidadFilter</filter-class>
</filter>
</web-app>
然后是faces-config.xml的配置信息
<?xml version='1.0' encoding='UTF-8'?>
<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd"
version="1.2">
<!-- upload files by lw -->
<navigation-rule>
<from-view-id>/upload/upload.xhtml</from-view-id>
<navigation-case>
<from-outcome>uploadedfile</from-outcome>
<to-view-id>/upload/uploadlist.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
<managed-bean>
<managed-bean-name>upLoadBean</managed-bean-name>
<managed-bean-class>
com.lw.bean.UpLoadBean
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
UpLoadBean类
package com.lw.bean;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import org.apache.myfaces.trinidad.model.UploadedFile;
public class UpLoadBean ...{
private UploadedFile file;
public UploadedFile getFile() ...{
return file;
}
public void setFile(UploadedFile file) ...{
this.file = file;
}
public String uploadedfile() ...{
try ...{
FacesContext context = FacesContext.getCurrentInstance();
//在控制台输出上传文件的文件名，和文件大小
FacesMessage message = new FacesMessage(
"Successfully uploaded file" + file.getFilename() + "("
+ file.getLength() + "bytes)");
context.addMessage(null, message);
InputStream stream;
stream = new BufferedInputStream(file.getInputStream());
byte[] bytes = new byte[1024 * 1024];//设定文件大小
@SuppressWarnings("unused")
int count;
count = stream.read(bytes);
stream.close();//关闭流
return "uploadedfile";
} catch (IOException e) ...{
e.printStackTrace();
return null;
}
}
}
上传页面upload.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:u="http://java.sun.com/blueprints/ui"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:a4j="https://ajax4jsf.dev.java.net/ajax"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:tr="http://myfaces.apache.org/trinidad" xml:lang="en" lang="en">
<head>
<title>My Facelets Page</title>
<meta http-equiv="keywords" content="enter,your,keywords,here" />
<meta http-equiv="description"
content="A short description of this page." />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<!--<link rel="stylesheet" type="text/css" href="styles.css">-->
<script>
</script>
</head>
<body>
<f:view>
<tr:form usesUpload="true">
<tr:inputFile label="上传:" value="#{upLoadBean.file}" />
<tr:commandButton text="开始" action="#{upLoadBean.uploadedfile}" />
</tr:form>
</f:view>
</body>
</html>
显示上传文件的文件名和文件大小的页面uploadlist.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<head>
<title>My Facelets Page</title>
<meta http-equiv="keywords" content="enter,your,keywords,here" />
<meta http-equiv="description"
content="A short description of this page." />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<!--<link rel="stylesheet" type="text/css" href="styles.css">-->
</head>
<body>
<f:view>
<h:panelGrid border="0" columns="2" style="width: 411px">
<h:outputText value="文件名：" />
<h:outputText value="#{upLoadBean.file.filename}" />
<h:outputText value="文件大小：" />
<h:outputText value="#{upLoadBean.file.length}" />
</h:panelGrid>
</f:view>
</body>
</html>
现在功能已经实现了，不过这个程序上传的文件成功后，会把文件变成tmp文件，不过我需要的功能已经实现了，因为我上传的是excel和work文件，然后用POI解析tmp文件，把它存入数据库就可以了。
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