action的代码：
1 package cn.com.spdbccc.coms.action; 2 3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.IOException; 6 import java.io.InputStream; 7 import java.io.UnsupportedEncodingException; 8 import java.text.SimpleDateFormat; 9 import java.util.Date; 10 import org.apache.commons.io.FileUtils; 11 import org.apache.commons.lang.xwork.StringUtils; 12 import org.apache.commons.logging.Log; 13 import org.apache.commons.logging.LogFactory; 14 import org.apache.struts2.ServletActionContext; 15 import org.apache.struts2.convention.annotation.InterceptorRef; 16 import org.apache.struts2.convention.annotation.Result; 17 import org.apache.struts2.convention.annotation.Results; 18 import org.springframework.beans.factory.annotation.Autowired; 19 import cn.com.spdbccc.coms.helper.MasterHelper; 20 import cn.com.spdbccc.coms.model.CardBase; 21 import cn.com.spdbccc.coms.model.User; 22 import cn.com.spdbccc.coms.service.CardBaseService; 23 import cn.com.spdbccc.coms.service.UniqueException; 24 import cn.com.spdbccc.coms.util.BrowserEncodingUtils; 25 26 import com.opensymphony.xwork2.Action; 27 28 @InterceptorRef(value = "fileUpload", params = { "maximumSize", "5242880", 29 "allowedExtensions", ".jpg", "allowedTypes", "image/jpeg"}) 30 @Results({ 31 @Result(name = Action.SUCCESS, type = "redirect", location = "card-base-list.action"), 32 @Result(name = CardBaseAction.PICTURE, type = "stream", params = { 33 "contentType", "application/image/jpeg", "inputName", 34 "downloadedPictureStream", "contentDisposition", 35 "attachment;filename="${downloadedPictureName}"", 36 "bufferSize", "4096" }) }) 37 public class CardBaseAction extends 38 AbstractCRUDAction<CardBase, Long, CardBaseService> { 39 /** 40 * serialVersionUID 41 */ 42 public static final long serialVersionUID = 5015762234382684801L; 43 44 private final static Log log = LogFactory.getLog(CardBaseAction.class); 45 /** 46 * 下载时的图片名 47 */ 48 private String downloadedPictureName; 49 50 private InputStream downloadedPictureStream; 51 52 /** 53 * 在页面显示的图片名 54 */ 55 private String displayedPictureName; 56 57 /** 58 * 相对于服务器的图片所在路径 59 */ 60 private String pictureWebPath; 61 62 /** 63 * @param cardBaseService 64 * the cardBaseService to set 65 */ 66 @Autowired 67 public void setCardBaseService(CardBaseService cardBaseService) { 68 super.setService(cardBaseService); 69 } 70 71 @Override 72 public String save() throws Exception { 73 // 当文件过大或者文件类型不符合的时候，hasError在拦截器处已经为false。但是仍然能够跳转到该函数 74 // 因此将hasError继承父类的值进行返回 75 boolean hasError = super.hasErrors(); 76 if (!hasError) { 77 User user = getUserFromSession(); 78 try { 79 if (model.getPicture() != null) { 80 model.setPicturePath(getSavedPicturePathName()); 81 } 82 service.save(model, user.getId()); 83 84 } catch (UniqueException e) { 85 addActionError(getText("errors.card.base.name.unique", 86 new String[] { model.getName() })); 87 hasError = true; 88 } 89 } 90 91 return hasError ? INPUT : SUCCESS; 92 } 93 94 @Override 95 public String update() throws Exception { 96 // 当文件过大或者文件类型不符合的时候，hasError在拦截器处已经为false。但是仍然能够跳转到该函数 97 // 因此将hasError继承父类的值进行返回 98 boolean hasError = super.hasErrors(); 99 if (!hasError) { 100 User user = getUserFromSession(); 101 try { 102 if (model.getPicture() != null) { 103 model.setPicturePath(getSavedPicturePathName()); 104 } 105 service.update(model, user.getId()); 106 } catch (UniqueException e) { 107 addActionError(getText("errors.card.base.name.unique", 108 new String[] { model.getName() })); 109 hasError = true; 110 } catch (Exception e) { 111 log.error(e); 112 addActionError(getText("errors.card.base.upload.failed", 113 new String[] { model.getPicturePath() })); 114 hasError = true; 115 } 116 } 117 return hasError ? INPUT : SUCCESS; 118 } 119 120 public String download() throws Exception { 121 downloadedPictureStream = null; 122 boolean hasError = false; 123 try { 124 if (StringUtils.isNotEmpty(model.getPicturePath())) { 125 model.setPicture(new File(model.getPicturePath())); 126 if (model.getPicture().exists()) { 127 downloadedPictureStream = new FileInputStream(model.getPicture()); 128 } 129 } 130 } catch (IOException e) { 131 log.error(e); 132 addActionError(getText("errors.card.base.download.failed", 133 new String[] { getDisplayedPictureName() })); 134 hasError = true; 135 } 136 return hasError ? INPUT : PICTURE; 137 138 } 139 140 /** 141 * 保存图片并获取文件名和路径 142 * 143 * @return 144 * @throws Exception 145 */ 146 public String getSavedPicturePathName() throws Exception { 147 SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS"); // 精确到毫秒 148 User user = getUserFromSession(); 149 String savedPictureFileName = user.getId() + "_" + fmt.format(new Date()) + ".jpg";// 取文件名:用户id_时间（毫秒级） 150 File savedPicture = null; 151 try { 152 if (model.getPicture() != null) { 153 String cardBasePath = MasterHelper.get().getValue("card.base.path"); 154 String savedPicturePath = ServletActionContext.getServletContext().getRealPath(cardBasePath); 155 savedPicture = new File(savedPicturePath, savedPictureFileName); 156 if (!savedPicture.getParentFile().exists()) { 157 savedPicture.getParentFile().mkdirs(); 158 } 159 FileUtils.copyFile(model.getPicture(), savedPicture); 160 model.getPicture().delete();// 删除临时文件 161 } 162 } catch (Exception e) { 163 throw e; 164 } 165 return savedPicture.getAbsolutePath();// 获取的包括路径和名称 166 } 167 168 public void setDownloadedPictureStream(InputStream downloadedPictureStream) { 169 this.downloadedPictureStream = downloadedPictureStream; 170 } 171 172 173 174 public String deletePicture() throws Exception { 175 model.setPicturePath(""); 176 super.update(); 177 return INPUT; 178 } 179 180 public InputStream getDownloadedPictureStream() { 181 return downloadedPictureStream; 182 } 183 184 public String getPictureWebPath() throws Exception { 185 model.setPicture(new File(model.getPicturePath()));//通过PicturePath找到图片 186 //如果PicturePath存在，但是Picture不存在，就不显示，不用抛出异常 187 pictureWebPath = MasterHelper.get().getValue("card.base.path") + "/" + model.getPicture().getName(); 188 return pictureWebPath; 189 } 190 191 public void setPictureWebPath(String pictureWebPath) { 192 this.pictureWebPath = pictureWebPath; 193 } 194 195 /** 196 * 获取下载的图片名 197 * 198 * @return 199 * @throws UnsupportedEncodingException 200 */ 201 public String getDownloadedPictureName() throws UnsupportedEncodingException { 202 // 处理浏览器中文文件名乱码问题 203 downloadedPictureName = BrowserEncodingUtils.convert(getDisplayedPictureName()); 204 return downloadedPictureName; 205 } 206 207 public void setDownloadedPictureName(String downloadedPictureName) { 208 this.downloadedPictureName = downloadedPictureName; 209 } 210 211 public String getDisplayedPictureName() { 212 if (StringUtils.isNotEmpty(model.getCardBaseNo()) && StringUtils.isNotEmpty(model.getName())) { 213 //e.g. HIP00000009 214 displayedPictureName = model.getCardBaseNo() + "_" + model.getName() + ".jpg"; 215 } else { 216 displayedPictureName = null; 217 } 218 return displayedPictureName; 219 } 220 221 public void setDisplayedPictureName(String displayedPictureName) { 222 this.displayedPictureName = displayedPictureName; 223 } 224 }
jsp代码：
<tr>
<!-- 图片上传选择框 -->
<td class="label"><s:label key="labels.card.base.picture"/></td>
<td><s:file name="picture" id="picture" cssStyle="400px"/>
<!-- 此处用于显示卡基图片名称和删除按钮 -->
<s:if test="picturePath != null && picturePath != '' ">
<!-- <td class="label"></td> -->
<!-- 图片名称超链接 -->
<s:url id="urlDownloadPicture" action="card-base!download" includeParams="none">
<s:param name="pk" value="id"></s:param>
</s:url>
<s:a href="%{urlDownloadPicture}">${displayedPictureName}</s:a>
<!-- 刪除按鈕 -->
<s:submit key="labels.card.base.button.deletePicture" name="buttonDeletePicture" id="buttonDeletePicture" onclick="return false;"/>
</s:if>
</td>
</tr>
<s:if test="picturePath != null && picturePath != '' ">
<tr>
<td class="label"></td>
<td><img src='${pictureWebPath}' height="300px"></td>
</tr>
</s:if>
这里面有modelDriven机制，同时在基类定义了相关传递pk后的处理方法。