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

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

    <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,…