java读取本地图片并在jsp中显示

java读取本地图片并在jsp中显示

 

java：

public void showPicture() throws Exception
    {
       
            String picId = getRequest().getParameter("picId");
            String pic_path = pointCardApplyManager.findPicturePath(picId);
            System.out.println(pic_path);
            FileInputStream is = new FileInputStream(pic_path);
            int i = is.available(); // 得到文件大小
            byte data[] = new byte[i];
            is.read(data); // 读数据
            is.close();
            response.setContentType("image/*"); // 设置返回的文件类型
            OutputStream toClient = response.getOutputStream(); // 得到向客户端输出二进制数据的对象
            toClient.write(data); // 输出数据
            toClient.close();

    }

 

jsp：

                          src="${ctx}/showPicture.action?picId=" οnclick="selectForward('');">
      

 

javascript：

 

function selectForward(picId){  
  var objForm = document.applyForm;
  
  var url="${ctx}/showPicture.action?picId="+picId;
   
  var openStyle="dialogHeight:500px; dialogWidth:500px; status:no; help:no; scroll:auto";
  var result = window.showModalDialog(url,window.document,openStyle);
  
  return true;
 }

 

显示效果二：

 

jsp：

                          src="${ctx}/showPicture.action?picId=">
      

      

                          src="${ctx}/showPicture.action?picId=">
      

 

 

 

javascript：

 

function displayDiv1(name) {
  document.getElementById(name).style.display="block";
 }
 function displayDiv2(name) {
  document.getElementById(name).style.display="none";
 }