SSH改变用户头像

这个需求在大部分网站中都有体现，就是改变用户的头像，用户随意上传一张图片，然后以后还可以修改头像。

一般网站是这样做的：注册时不需要设置头像，然后当用户使用多了，便可以自由改变原有的默认头像。

这个实现起来很简单：

代码已经上传，使用时注意几点

1.struts.xml 中的配置 ，基本就这样写，showUsers指的是一个Action，表示改完图片后，执行的展示全部用户信息的Action。

<action name="upUser" class="com.action.UpUserAction"><interceptor-ref name="fileUpload"><param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg</param><param name="maximumSize">1024*1024</param></interceptor-ref><interceptor-ref name="defaultStack"></interceptor-ref><param name="savePath">/upload</param><result name="success" type="chain">showUsers</result><result name="input">/upUser.jsp</result></action>

UtilMethod.java(一个工具类，辅助实现JSP和文件的上传)

package com.util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.List;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.dao.UserDao;import com.domain.User;public class UtilMethod {public static List<User> findAll()   //表示静态调出全部用户信息{ApplicationContext context =new ClassPathXmlApplicationContext("applicationContext.xml");UserDao userDao=(UserDao) context.getBean("userDao");return userDao.findAll();}public  static void close(FileOutputStream fos, FileInputStream fis) {        if (fis != null) {            try {                fis.close();            } catch (IOException e) {                System.out.println("FileInputStream关闭失败");                e.printStackTrace();            }        }        if (fos != null) {            try {                fos.close();            } catch (IOException e) {                System.out.println("FileOutputStream关闭失败");                e.printStackTrace();            }        }    }public static void Upload(String uploadPath,String SaveName,File file){   //辅助类，实现文件的生成。if (!(new File(uploadPath)).exists()) {new File(uploadPath).mkdirs();}File saveFile=new File(uploadPath,SaveName);FileOutputStream fos = null;FileInputStream fis = null;try{fos = new FileOutputStream(saveFile);  fis = new FileInputStream(file);          //设置缓存          byte[] buffer = new byte[1024];            int length = 0;            //读取File文件输出到saveFile文件中          while ((length = fis.read(buffer)) > 0) {              fos.write(buffer, 0, length);          }  }catch(Exception e){System.out.println("文件上传失败");            e.printStackTrace();} finally {UtilMethod.close(fos, fis);        }}}

applicationContext.xml中核心

配置user是为了提交修改页面的数据后，可以在UpUser中自动把表单数据填充到user对象中。

       <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">       <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>       </bean>       <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">       <property name="sessionFactory" ref="sessionFactory"></property>       </bean>       <bean id="userDao" class="com.dao.UserDaoImpl">      <property name="hibernateTemplate" ref="hibernateTemplate"></property>       </bean>                   <bean id="user" class="com.domain.User"></bean>

UpUserAction.java

package com.action;import java.io.File;import java.io.IOException;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import org.apache.struts2.ServletActionContext;import com.dao.UserDao;import com.domain.User;import com.opensymphony.xwork2.ActionSupport;import com.util.UtilMethod;public class UpUserAction extends ActionSupport {private static final long serialVersionUID = 1L;private UserDao userDao;   //数据源private User user;//把标单数据自动注入到此JavaBean中private File file;private String fileFileName;  private String postId;public UserDao getUserDao() {return userDao;}public void setUserDao(UserDao userDao) {this.userDao = userDao;}public File getFile() {return file;}public void setFile(File file) {this.file = file;}public String getFileFileName() {return fileFileName;}public void setFileFileName(String fileFileName) {this.fileFileName = fileFileName;}public String getPostId() {return postId;}public void setPostId(String postId) {this.postId = postId;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}@Overridepublic String execute(){List<User>users=userDao.findAll();User old=new User();for(User u:users)            {if(u.getId().intValue()==user.getId().intValue())   //JSP中隐藏了user的Id数据，即这一项不可改变，找到原来的User，得到原来的数据{old=u;break;}}old.setName(user.getName());   //把表单中的数据填充到原来的user中。String uploadPath  = ServletActionContext.getServletContext().getRealPath("/upload");SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhhmmssSSS");//设置日期格式String msg =sdf.format(new Date(System.currentTimeMillis()));if(file==null || fileFileName==null){user.setPhoto("default.jpg");}else{if(!old.getPhoto().equals("default.jpg"))   //把过去使用的图片删除，但不会删除默认的图片{Path del=Paths.get(uploadPath+"\\"+user.getPhoto());  System.out.println("被删除的图片位置是："+uploadPath+"\\"+user.getPhoto());try {Files.deleteIfExists(del);} catch (IOException e) {System.out.println("原来的图片没有删除！！！");e.printStackTrace();}}String param = fileFileName.substring(fileFileName.lastIndexOf("."));String SaveName = msg + param;    UtilMethod.Upload(uploadPath, SaveName, file);old.setPhoto(SaveName);}userDao.update(old);return SUCCESS;}}

基本上便是这样实现，具体请参考源码：点我获得源码