SSH(Struts2+Spring+Hibernate)实现文件的上传
该模块我是前几天在实验室待了大半天刚刚写的,可能还有很多Bug,在项目中实现文献上传功能.
依旧用SSH实现,逻辑,结构,层次比较清晰.
各种jar包嘛和上次SSH实现登录所用的一致.
首先是上传页面(upload.jsp)
主要代码如下,其中文件字段按自己所需可以改,但在Action中也必须增减相应字段来接受,
<s:file name=“upload” label=“文件名” />
<s:textfield name=“author” label=“上传者” />
<s:textfield name=“description” label=“文件描述” />
<s:submit value=“上传” />
</s:form>
和上次一样,按照MVC思想:
增加一个上传文件的上传文件功能的Action
import com.opensymphony.xwork2.ActionSupport;
import edu.bjtu.resource.service.ResourceService;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
/**
*
* @author yilee
*/
public class FileUploadAction extends ActionSupport {
private static final long serialVersionUID = 1L;
// 代表上传文件的File对象
private File upload;
// 上传文件名
private String uploadFileName;
// 上传文件的MIME类型
private String uploadContentType;
// 上传文件的描述信息
private String description;
// 保存上传文件的目录，相对于WEB应用程序的根路径，在struts.xml中配置
private String uploadDir;
//作者
private String author;
//日期
private Date date;
//
private ResourceService resourceService;
//保存结果
private String result;
//省略Getter和Setter方法
@Override
public String execute() throws Exception {
// 得到保存上传文件的目录的真实路径
File dir = new File(“C:\\upload”);
// 如果该目录不存在，就创建
if (!dir.exists()) {
dir.mkdirs();
}
int pos = uploadFileName.lastIndexOf(“.”);
uploadContentType = uploadFileName.substring(pos + 1);//文件后缀名
date = new Date();//当前日期
InputStream is = new FileInputStream(upload);
OutputStream os = new FileOutputStream(new File(dir, uploadFileName));
byte[] buf = new byte[1024];
int len = -1;
while ((len = is.read(buf)) != -1) {
os.write(buf, 0, len);
}
is.close();
os.close();
setUploadDir(“C:\\upload”);//保存路径
if (resourceService.saveFile(uploadFileName, uploadDir, author, description, date)) {
result = “{suc:1, msg:’上传成功!’}”;
} else {
result = “{suc:0, msg:’上传失败!’}”;
}
return SUCCESS;
}
}
Service层
核心方法
private ResourceDao resourceDao;
//省略Getter和Setter方法
public boolean saveFile(String fileName, String fileDir, String author, String description, Date date) {
if (resourceDao.save(fileName, fileDir, author, description, date)) {
return true;
} else {
return false;
}
}
}
操作数据库,Dao层
public boolean save(String fileName, String fileDir, String author, String description, Date date) {
resource rs = new resource();
rs.setAuthor(author);
rs.setDescription(description);
rs.setFileDir(fileDir);
rs.setFileName(fileName);
rs.setDate(date);
try {
getHibernateTemplate().save(rs);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
}
Model层 资源文件
public class resource {
private int id;
private File doc;//文献
private String fileName;//名称
private String contentType;//类型
private String fileDir;//路径
private Date date;//上传日期
private String author;//作者
private String description;//注释
//按需添加属性
//省略Getter和Setter方法
}
Hibernate映射文件
resource.hbm.xml
<!DOCTYPE hibernate-mapping PUBLIC “-//Hibernate/Hibernate Mapping DTD 3.0//EN” “http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd”>
<hibernate-mapping package=“edu.bjtu.resouce.model”>
<class name=“edu.bjtu.resource.model.resource” table=“resource”>
<id column=“resource_id” name=“id” type=“integer”>
<generator class=“increment”/>
</id>
<property column=“fileName” name=“fileName” type=“string”/>
<property column=“fileDir” name=“fileDir” type=“string”/>
<property column=“author” name=“author” type=“string”/>
<property column=“description” name=“description” type=“string”/>
<property column=“date” name=“date” type=“date”/>
</class>
</hibernate-mapping>
Struts配置文件
<!DOCTYPE struts PUBLIC
“-//Apache Software Foundation//DTD Struts Configuration 2.0//EN”
“http://struts.apache.org/dtds/struts-2.0.dtd”>
<struts>
<!- 上传文件的临时目录 ->
<constant name=“struts.multipart.saveDir” value=“C:\\x”></constant>
<!- 上传文件的总大小限制 ->
<constant name=“struts.multipart.maxSize” value=“102400000″></constant>
<!- 资源文件配置 ->
<constant name=“struts.custom.i18n.resources”
value=“ApplicationResources”>
</constant>
<package name=“file” extends=“struts-default”>
<action name=“fileUploadAction” class=“fileUploadAction”>
<result name=“success”>/successUpload.jsp</result>
<param name=“uploadDir”>/WEB-INF/UploadFiles</param>
</action>
</package>
</struts>
Spring配置文件
<!DOCTYPE beans PUBLIC “-//SPRING//DTD BEAN//EN” “/WEB-INF/dtd/spring-beans.dtd”>
<beans default-lazy-init=“true”>
<bean id=“resourceDao” class=“edu.bjtu.resource.dao.impl.ResourceDaoImpl”>
<property name=“sessionFactory” ref=“sessionFactory”></property>
</bean>
<bean id=“resourceService” parent=“transactionProxy”>
<property name=“target”>
<bean class=“edu.bjtu.resource.service.impl.ResourceServiceImpl”>
<property name=“resourceDao”>
<ref local=“resourceDao”/>
</property>
</bean>
</property>
</bean>
<bean id=“fileUploadAction” class=“edu.bjtu.resource.action.FileUploadAction” lazy-init=“false”>
<property name=“resourceService”>
<ref local=“resourceService”/>
</property>
</bean>
</beans>
上传成功后页面, successUpload.jsp 核心代码
文件名：<s:property value=“uploadFileName” /><br/>
文件大小：<s:property value=“upload.length()” /><br/>
文件类型：<s:property value=“uploadContentType” /><br/>
上传者 : <s:property value=“author” /><br/>
文件描述：<s:property value=“description” /><br/>
当然,肯定还需要加各种拦截器,在Struts中,任何Action都需要拦截器.
这一文件上传模块中必须新建拦截器,以验证是否登录,验证权限等功能,这里省略拦截器.
关于拦截器的详细使用,也许过几天会详细描述.
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