最近在做关于微信公众号的项目，其中需要上传图片代码如下（亲测有效）
前端代码，请将样式忽略
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>上传微信永久素材</title>
<link rel="stylesheet" type="text/css" href="../script/css/index.css" />
<script type="text/javascript" src="../script/js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="../script/js/jquery-cookie.js"></script>
<script type="text/javascript" src="../script/js/main_new.js"></script>
<script type="text/javascript" src="../script/js/jsmd5.js"></script>
<script type="text/javascript" src="../script/js/jsuuid.js"></script>
<style type="text/css">
.register ul li span.title { padding-left:160px; width:150px;}
</style>
<script language="javascript" type="text/javascript">
function subMit(){
var formData = new FormData($("#formContent")[0]);
$.ajax({
url: E_URL+"/tbs/uploadImageToWechat",
type: 'POST',
data: formData,
async: false,
cache: false,
contentType: false,
processData: false,
dataType:'json',
success:function(result){
alert(result.mess);
},
error:function(){
}
})
}
</script>
</head>
<body>
<div class="headebox"></div>
<div class="main">
<h2 class="login_h">上传图片</h2>
<div class="loginbox clearfloat">
<form id="formContent" >
<input type="file" name="picFile" id="fileName"/><br />
<input type="button" value="提交" id="uploadImage" οnclick="subMit()"/>
</form>
</div>
</div>
</body>
</html>
controller层代码
@RequestMapping("/uploadImageToWechat")
public ModelAndView uploadImageToWechat(HttpServletRequest request,@RequestParam(value = "picFile", required = false) CommonsMultipartFile picFile){
String mediaId="";
if(picFile!=null){
String result=tbsService.addMaterialEver(picFile, request);
JSONObject json=JSONObject.fromObject(result);
mediaId=json.getString("media_id");
}
return ModelAndViewUtil.Json_ok(mediaId);
}
service层代码
/**
* 向微信新增永久素材
*/
@Override
public String addMaterialEver(CommonsMultipartFile picFile,HttpServletRequest request) {
File file = new File(request.getSession().getServletContext().getRealPath(File.separator+"weChatPic"));
if (!file.exists())
file.mkdirs();
File file1 = new File(request.getSession().getServletContext().getRealPath(File.separator+"weChatPic"+File.separator+System.currentTimeMillis()+picFile.getFileItem().getName()));
try {
picFile.getFileItem().write(file1);
} catch (Exception e) {
}
String result = null;
try {
result = addMaterialEverInter(file1,"image");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(result);
return result;
}
public static String addMaterialEverInter(File file,String type) throws Exception {
String accessToken="";
try {
accessToken=AccessTokenUtil.getTBS_AccessToken();
} catch (Exception e) {
e.printStackTrace();
};
//上传素材
String path="https://api.weixin.qq.com/cgi-bin/material/add_material?access_token="+accessToken+"&type="+type;
String result =null;
URL realUrl = new URL(path);
URLConnection con= realUrl.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false); // post方式不能使用缓存
// 设置请求头信息
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
// 设置边界
String BOUNDARY = "----------" + System.currentTimeMillis();
con.setRequestProperty("Content-Type",
"multipart/form-data; boundary="
+ BOUNDARY);
// 请求正文信息
// 第一部分：
StringBuilder sb = new StringBuilder();
sb.append("--"); // 必须多两道线
sb.append(BOUNDARY);
sb.append("\r\n");
sb.append("Content-Disposition: form-data;name=\"media\";filelength=\""+file.length()+"\";filename=\""
+ file.getName() + "\"\r\n");
sb.append("Content-Type:application/octet-stream\r\n\r\n");
byte[] head = sb.toString().getBytes("utf-8");
// 获得输出流
OutputStream out = new DataOutputStream(con.getOutputStream());
// 输出表头
out.write(head);
// 文件正文部分
// 把文件已流文件的方式 推入到url中
DataInputStream in = new DataInputStream(new FileInputStream(file));
int bytes = 0;
byte[] bufferOut = new byte[1024];
while ((bytes = in.read(bufferOut)) != -1) {
out.write(bufferOut, 0, bytes);
}
in.close();
// 结尾部分
byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定义最后数据分隔线
out.write(foot);
out.flush();
out.close();
StringBuffer buffer = new StringBuffer();
BufferedReader reader = null;
try {
// 定义BufferedReader输入流来读取URL的响应
reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
if (result == null) {
result = buffer.toString();
}
} catch (IOException e) {
System.out.println("发送POST请求出现异常！" + e);
e.printStackTrace();
throw new IOException("数据读取异常");
} finally {
if (reader != null) {
reader.close();
}
}
return result.toString();
}
返回值为media_id和url
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