向服务器上 上传图片

**1.首先配置tomcat服务器上的web.xml（readOnly=false）
2.在服务器上创建一个文件目录（用来存放）
3.导入相关依赖的jar包（jersey json）
4.ajax异步提交**

一：明确资源服务器地址

public class Constant {


public static final String RESOURCEURL="http://192.168.237.129";


}

二：在资源服务器上确定文件路径（创建文件夹）
这里举例：*upImages*
三：配置所上传的最大文件大小，在springmvc配置文件中

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="1048576"></property>
    </bean>

<form id="jvForm" action="add!!!" method="post" enctype="multipart/form-data">

<td width="80%" class="pn-fcontent">
<img width="100" height="100" id="allUrl"/>
<input id="imgUrl" name="imgUrl" type="hidden" value=""></input>
<input id="f" name="fileName" type="file" />
</td>

</from>
<script type="text/javascript">
 $(function(){
 $("#f").change(function(){

 $("#jvForm").ajaxSubmit({
 url:"URL",//默认是form action
 type:"post",
 dataType:"json",
 success:function(data){
 $("#imgUrl").val(data.path);
 $("#allUrl").attr("src",data.url);

 } 
 });
 });
 });
</script>
</body>
</html>

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import org.apache.commons.io.FilenameUtils;
import org.json.simple.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.classroom.util.Constant;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientHandlerException;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.sun.jersey.api.client.WebResource;

@Controller
public class FileUploadController {

 @RequestMapping("/URL")
 @ResponseBody
 public String fileUpload(MultipartFile fileName){
 JSONObject json = new JSONObject();
 StringBuilder pathName =new StringBuilder("upImages/");
 SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmssSSS");
 pathName.append(sdf.format(new Date()));
 for(int i=0;i<4;i++){
 Random random=new Random();
 pathName.append(random.nextInt(10));
 }
 pathName.append("."+FilenameUtils.getExtension(fileName.getOriginalFilename()));

 json.put("path", pathName.toString());
 pathName.insert(0, Constant.RESOURCEURL+"/");
 json.put("url",pathName.toString());

 Client client = new Client();
 WebResource webResource =client.resource(pathName.toString());
 try {
 webResource.put(String.class, fileName.getBytes());
 } catch (UniformInterfaceException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (ClientHandlerException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 return json.toJSONString();

 }

}

记录一下 有点乱,…