struts2 action 返回图片流

数据库为mssql zp字段为image类型

java代码

 OutputStream out = null;
          try
          {
              String contenttype = "image/jpeg";
              ActionContext context = ActionContext.getContext();
               // HttpServletRequest request = (HttpServletRequest) context.get(ServletActionContext.HTTP_REQUEST);
                HttpServletResponse response = (HttpServletResponse) context.get(ServletActionContext.HTTP_RESPONSE);  

                response.setContentType(contenttype);
                out = response.getOutputStream();
           Statement stmt=con.createStatement();
           String sql="select top 1 zp from table_1 ";
           ResultSet rs=stmt.executeQuery(sql);
           //byte []by =rs.getBytes(0);
           while(rs.next()){
               out.write(rs.getBytes("ZP"));
           }
          }
          catch(SQLException ee){

          }
          finally {
              out.flush();
                out.close();
          }        

struts.xml

<action name="bb" class="test.tt" method="getimage2">
        </action>

index.jsp

 <img name="inputName"  id="inputName" src="bb.action"/>