1、引入文件插件 2、对div控件重写（插件实现）
代码语言：javascript复制<code class="hljs javascript has-numbering"><span class="hljs-comment">// 初始化上传图片插件</span>
$(<span class="hljs-string">'#upload_bottom1'</span>).diyUpload({
url : <span class="hljs-string">'fileUploadAction'</span>,
success : <span class="hljs-function"><span class="hljs-keyword">function</span><span class="hljs-params">(data)</span> {</span>
$.ajax({
async : <span class="hljs-literal">false</span>,
url : <span class="hljs-string">"addProductImg"</span>,
data : {
prodId : prodId,
imgUrl : data.message,
type : <span class="hljs-number">1</span>,
sort : <span class="hljs-number">1</span>
},
dataType : <span class="hljs-string">"JSON"</span>,
type : <span class="hljs-string">"POST"</span>,
success : <span class="hljs-function"><span class="hljs-keyword">function</span><span class="hljs-params">(result)</span> {</span>
<span class="hljs-keyword">if</span> (result > <span class="hljs-number">0</span>) {
getPic(<span class="hljs-number">1</span>);
}
}
});
},
error : <span class="hljs-function"><span class="hljs-keyword">function</span><span class="hljs-params">(err)</span> {</span>
alert(err);
},
buttonText : <span class="hljs-string">'选择文件'</span>,
chunked : <span class="hljs-literal">true</span>,
<span class="hljs-comment">// 分片大小</span>
chunkSize : <span class="hljs-number">512</span> * <span class="hljs-number">1024</span>,
<span class="hljs-comment">// 最大上传的文件数量, 总文件大小,单个文件大小(单位字节);</span>
fileNumLimit : <span class="hljs-number">50</span>,
fileSizeLimit : <span class="hljs-number">500000</span> * <span class="hljs-number">1024</span>,
fileSingleSizeLimit : <span class="hljs-number">50000</span> * <span class="hljs-number">1024</span>,
accept : {}
});</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li></ul>//点击上传后执行：
/////分析：执行了两个操作： （1）、上传图片都服务器：fileUploadAction ////相应：
//stucts拦截请求，
代码语言：javascript复制<code class="hljs applescript has-numbering"><action <span class="hljs-property">name</span>=<span class="hljs-string">"fileUploadAction"</span> <span class="hljs-type">class</span>=<span class="hljs-string">"yamadv.com.upload.FileAction"</span>>
<<span class="hljs-constant">result</span> type=<span class="hljs-string">"json"</span> <span class="hljs-property">name</span>=<span class="hljs-string">"success"</span>>
<param <span class="hljs-property">name</span>=<span class="hljs-string">"contentType"</span>>
<span class="hljs-type">text</span>/html
</param>
</<span class="hljs-constant">result</span>>
<<span class="hljs-constant">result</span> type=<span class="hljs-string">"json"</span> <span class="hljs-property">name</span>=<span class="hljs-string">"error"</span>>
<param <span class="hljs-property">name</span>=<span class="hljs-string">"contentType"</span>>
<span class="hljs-type">text</span>/html
</param>
</<span class="hljs-constant">result</span>>
</action></code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li></ul>//到action中执行，后返回数据：
代码语言：javascript复制<code class="hljs java has-numbering"><span class="hljs-keyword">public</span> String <span class="hljs-title">execute</span>() <span class="hljs-keyword">throws</span> Exception {
String path = ServletActionContext.getServletContext().getRealPath(<span class="hljs-string">"/upload"</span>);
String pathuri = ServletActionContext.getRequest().getContextPath();
FileInputStream inputStream=<span class="hljs-keyword">null</span>;
FileOutputStream outputStream=<span class="hljs-keyword">null</span>;
<span class="hljs-keyword">try</span> {
File f = <span class="hljs-keyword">this</span>.getFile();
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.getFileFileName().endsWith(<span class="hljs-string">".exe"</span>)) {
message = <span class="hljs-string">"对不起,你上传的文件格式不允许!!!"</span>;
<span class="hljs-keyword">return</span> ERROR;
}
inputStream = <span class="hljs-keyword">new</span> FileInputStream(f);
String s = DateParse.date4String(<span class="hljs-keyword">new</span> Date());
fileFileName = s <span class="hljs-keyword">this</span>.getFileFileName();
outputStream = <span class="hljs-keyword">new</span> FileOutputStream(path <span class="hljs-string">"/"</span>
fileFileName);
<span class="hljs-keyword">byte</span>[] buf = <span class="hljs-keyword">new</span> <span class="hljs-keyword">byte</span>[<span class="hljs-number">1024</span>];
<span class="hljs-keyword">int</span> length = <span class="hljs-number">0</span>;
<span class="hljs-keyword">while</span> ((length = inputStream.read(buf)) != -<span class="hljs-number">1</span>) {
outputStream.write(buf, <span class="hljs-number">0</span>, length);
}
<span class="hljs-comment">//message = pathuri "/upload/" fileFileName;</span>
message = <span class="hljs-string">"/upload/"</span> fileFileName;
} <span class="hljs-keyword">catch</span> (Exception e) {
e.printStackTrace();
message = <span class="hljs-string">"对不起,文件上传失败了!!!!"</span>;
}<span class="hljs-keyword">finally</span>{
outputStream.flush();
inputStream.close();
outputStream.close();
}
<span class="hljs-keyword">return</span> SUCCESS;
}</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li><li>36</li></ul>（2）、将数据add进数据库中：返回json数据：1232
代码语言：javascript复制<code class="hljs java has-numbering"><span class="hljs-javadoc">/**
* 添加商品图片
*/</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">addProductImg</span>() {
<span class="hljs-keyword">int</span> prodId = Integer.parseInt(<span class="hljs-keyword">this</span>.getRequest().getParameter(<span class="hljs-string">"prodId"</span>));
String imgUrl = <span class="hljs-keyword">this</span>.getRequest().getParameter(<span class="hljs-string">"imgUrl"</span>);
<span class="hljs-keyword">int</span> type = Integer.parseInt(<span class="hljs-keyword">this</span>.getRequest().getParameter(<span class="hljs-string">"type"</span>));
<span class="hljs-keyword">int</span> sort = Integer.parseInt(<span class="hljs-keyword">this</span>.getRequest().getParameter(<span class="hljs-string">"sort"</span>));
Tproducyimg pimg = <span class="hljs-keyword">new</span> Tproducyimg();
pimg.setType(type);
pimg.setImgUrl(imgUrl);
pimg.setProdId(prodId);
pimg.setIsValid(<span class="hljs-keyword">true</span>);
pimg.setSort(sort);
<span class="hljs-keyword">int</span> result = <span class="hljs-keyword">this</span>.productImgService.addProductImg(pimg);
<span class="hljs-keyword">if</span> (result > <span class="hljs-number">0</span>) {
MSG = <span class="hljs-string">"OK"</span>;
} <span class="hljs-keyword">else</span> {
MSG = <span class="hljs-string">"NO"</span>;
}
<span class="hljs-keyword">this</span>.writeJson(result);
}</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li></ul>action补充：如何相应请求到前台：
代码语言：javascript复制<code class="hljs java has-numbering"><span class="hljs-annotation">@Component</span>(value=<span class="hljs-string">"baseAction"</span>)
<span class="hljs-keyword">public</span> <span class="hljs-keyword">abstract</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">BaseAction</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">ActionSupport</span> <span class="hljs-keyword">implements</span> <span class="hljs-title">ServletRequestAware</span> {</span>
<span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">long</span> serialVersionUID = -<span class="hljs-number">6604674795899991348</span>L;
<span class="hljs-keyword">private</span> HttpServletRequest request;
<span class="hljs-keyword">private</span> HttpSession session;
<span class="hljs-annotation">@SuppressWarnings</span>(<span class="hljs-string">"unused"</span>)
<span class="hljs-keyword">private</span> ServletConfig config;
<span class="hljs-keyword">public</span> ServletConfig <span class="hljs-title">getConfig</span>(){
<span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.config = (ServletConfig)request.getSession().getServletContext().getAttribute(<span class="hljs-string">"servletConfig"</span>);
}
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setConfig</span>(ServletConfig config) {
<span class="hljs-keyword">this</span>.config = config;
}
<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setServletRequest</span>(HttpServletRequest arg0) {
<span class="hljs-comment">// TODO Auto-generated method stub</span>
<span class="hljs-keyword">this</span>.request=arg0;
<span class="hljs-keyword">this</span>.session=<span class="hljs-keyword">this</span>.request.getSession();<span class="hljs-comment">//get session for client</span>
}
<span class="hljs-keyword">public</span> HttpServletRequest <span class="hljs-title">getRequest</span>() {
<span class="hljs-keyword">return</span> request;
}
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setRequest</span>(HttpServletRequest request) {
<span class="hljs-keyword">this</span>.request = request;
}
<span class="hljs-keyword">public</span> HttpSession <span class="hljs-title">getSession</span>() {
<span class="hljs-keyword">return</span> session;
}
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setSession</span>(HttpSession session) {
<span class="hljs-keyword">this</span>.session = session;
}
<span class="hljs-javadoc">/**
* 获得response
*
*<span class="hljs-javadoctag"> @return</span>
*/</span>
<span class="hljs-keyword">public</span> HttpServletResponse <span class="hljs-title">getResponse</span>() {
<span class="hljs-keyword">return</span> ServletActionContext.getResponse();
}
<span class="hljs-javadoc">/**
* 将对象转换成JSON字符串，并响应回前台
*
*<span class="hljs-javadoctag"> @param</span> object
*<span class="hljs-javadoctag"> @param</span> includesProperties
* 需要转换的属性
*<span class="hljs-javadoctag"> @param</span> excludesProperties
* 不需要转换的属性
*/</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">writeJsonByFilter</span>(Object object, String[] includesProperties, String[] excludesProperties) {
<span class="hljs-keyword">try</span> {
FastjsonFilter filter = <span class="hljs-keyword">new</span> FastjsonFilter();<span class="hljs-comment">// excludes优先于includes</span>
<span class="hljs-keyword">if</span> (excludesProperties != <span class="hljs-keyword">null</span> && excludesProperties.length > <span class="hljs-number">0</span>) {
filter.getExcludes().addAll(Arrays.<String> asList(excludesProperties));
}
<span class="hljs-keyword">if</span> (includesProperties != <span class="hljs-keyword">null</span> && includesProperties.length > <span class="hljs-number">0</span>) {
filter.getIncludes().addAll(Arrays.<String> asList(includesProperties));
}
String json;
String User_Agent = getRequest().getHeader(<span class="hljs-string">"User-Agent"</span>);
<span class="hljs-keyword">if</span> (StringUtils.indexOfIgnoreCase(User_Agent, <span class="hljs-string">"MSIE 6"</span>) > -<span class="hljs-number">1</span>) {
<span class="hljs-comment">// 使用SerializerFeature.BrowserCompatible特性会把所有的中文都会序列化为\uXXXX这种格式，字节数会多一些，但是能兼容IE6</span>
json = JSON.toJSONString(object, filter, SerializerFeature.WriteDateUseDateFormat, SerializerFeature.DisableCircularReferenceDetect, SerializerFeature.BrowserCompatible);
} <span class="hljs-keyword">else</span> {
<span class="hljs-comment">// 使用SerializerFeature.WriteDateUseDateFormat特性来序列化日期格式的类型为yyyy-MM-dd hh24:mi:ss</span>
<span class="hljs-comment">// 使用SerializerFeature.DisableCircularReferenceDetect特性关闭引用检测和生成</span>
json = JSON.toJSONString(object, filter, SerializerFeature.WriteDateUseDateFormat, SerializerFeature.DisableCircularReferenceDetect);
}
getResponse().setContentType(<span class="hljs-string">"text/html;charset=utf-8"</span>);
getResponse().getWriter().write(json);
getResponse().getWriter().flush();
getResponse().getWriter().close();
} <span class="hljs-keyword">catch</span> (IOException e) {
e.printStackTrace();
}
}
<span class="hljs-javadoc">/**
* 将对象转换成JSON字符串，并响应回前台
*
*<span class="hljs-javadoctag"> @param</span> object
*<span class="hljs-javadoctag"> @throws</span> IOException
*/</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">writeJson</span>(Object object) {
writeJsonByFilter(object, <span class="hljs-keyword">null</span>, <span class="hljs-keyword">null</span>);
}
<span class="hljs-javadoc">/**
* 将对象转换成JSON字符串，并响应回前台
*
*<span class="hljs-javadoctag"> @param</span> object
*<span class="hljs-javadoctag"> @param</span> includesProperties
* 需要转换的属性
*/</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">writeJsonByIncludesProperties</span>(Object object, String[] includesProperties) {
writeJsonByFilter(object, includesProperties, <span class="hljs-keyword">null</span>);
}
<span class="hljs-javadoc">/**
* 将对象转换成JSON字符串，并响应回前台
*
*<span class="hljs-javadoctag"> @param</span> object
*<span class="hljs-javadoctag"> @param</span> excludesProperties
* 不需要转换的属性
*/</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">writeJsonByExcludesProperties</span>(Object object, String[] excludesProperties) {
writeJsonByFilter(object, <span class="hljs-keyword">null</span>, excludesProperties);
}
}</code>
