使用Jersey构建图片服务器过程解析

这篇文章主要介绍了使用Jersey构建图片服务器过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

前台页面代码

<form  action="add.do" method="post" enctype="multipart/form-data">	<table>		<tr>			<td width="20%" class="pn-flabel pn-flabel-h"></td>			<td width="80%" class="pn-fcontent">				<img width="100" height="100"  />				<input type="hidden" name="imgUrl"  />				<input type="file" onchange="uploadPic()" name="pic" />			</td>		</tr>	</table></form>

前台JS代码

<script type="text/javascript">	//上传图片	function uploadPic() {		//定义参数		var options = {			url : "/upload/uploadPic.do",			dataType : "json",			type : "post",			beforeSubmit : function(formData,jqForm,options){				// 判断是否为图片				// 将jqForm转成DOM对象				var f = jqForm[0];				// 获取DOM对象中name为logoPic的值				var v = f.logoPic.value;				// 获取扩展名,并转成小写				var ext = v.substring(v.length-3).toLowerCase();				// 比对扩展名 jpg gif bmp png 				if(ext != "jpg" && ext != "gif" && ext != "bmp" && ext != "png"){					alert("只允许上传图片!");					return false;				}				//校验提交的表单				return true;			},			success : function(data) {				// 回显图片内容				$("#allImgUrl").attr("src", data.url);				$("#path").val(data.path);			}		};		// jquery.form使用方式		$("#jvForm").ajaxSubmit(options);	}</script>

在Spring中配置图片转换器

<bean  class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 	<!-- 设置上传文件的最大尺寸为1MB --> 	<property name="maxUploadSize" value="1048576"/></bean>

创建UploadController以及工具类

package cn.itcast.core.controller.admin;import java.io.IOException;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;import javax.servlet.http.HttpServletResponse;import org.apache.commons.io.FilenameUtils;import org.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;import com.sun.jersey.api.client.Client;import com.sun.jersey.api.client.WebResource;import cn.itcast.common.web.ResponseUtils;import cn.itcast.core.web.Constants;@Controllerpublic class UploadController {	// 上传图片	@RequestMapping(value = "/upload/uploadPic.do")	public void uploadPic(@RequestParam(required = false) MultipartFile pic, HttpServletResponse response) {		// 扩展名		String ext = FilenameUtils.getExtension(pic.getOriginalFilename());		// 图片名称生成策略		DateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");		// 图片名称一部分		String format = df.format(new Date());		// 随机三位数		Random r = new Random();		// n 1000 0-999 99		for (int i = 0; i < 3; i++) {			format += r.nextInt(10);		}		// 实例化一个Jersey		Client client = new Client();		// 保存数据库		String path = "upload/" + format + "." + ext;		// 另一台服务器的请求路径是?		String url = Constants.IMAGE_URL + path;		// 设置请求路径		WebResource resource = client.resource(url);		// 发送开始 POST GET PUT		try {			resource.put(String.class, pic.getBytes()); 		} catch (IOException e) {			e.printStackTrace();		}		// 返回二个路径		JSONObject jsonObject = new JSONObject();		jsonObject.put("url", url);		jsonObject.put("path", path);		ResponseUtils.renderJson(response, jsonObject.toString());	}}package cn.itcast.core.web;public interface Constants {	/**	 * 图片服务器	 */	public static final String IMAGE_URL = "http://localhost:8088/BabasportProject_ImageService/";}package cn.itcast.common.web;import java.io.IOException;import javax.servlet.http.HttpServletResponse;public class ResponseUtils {	// 发送内容	public static void render(HttpServletResponse response, String contentType, String text) {		response.setContentType(contentType);		try {			response.getWriter().write(text);		} catch (IOException e) {			e.printStackTrace();		}	}	// 发送的是JSON	public static void renderJson(HttpServletResponse response, String text) {		render(response, "application/json;charset=UTF-8", text);	}	// 发送xml	public static void renderXml(HttpServletResponse response, String text) {		render(response, "text/xml;charset=UTF-8", text);	}	// 发送text	public static void renderText(HttpServletResponse response, String text) {		render(response, "text/plain;charset=UTF-8", text);	}}