@RequestMapping("/testJar")    public @ResponseBody String exteriorJar(int ys, int csd,int jg,int sf,int yf,int sd){        String result = "error";        //从数据库中读取算法类        String sql = "select EXTERIOR from T_EXTERIOR where id=2";        InputStream ins = null;        try{            Connection con = jdbcTemplate.getDataSource().getConnection();            Statement ps = con.createStatement();            ResultSet rs = ps.executeQuery(sql);            while(rs.next()){                Blob blob = rs.getBlob("EXTERIOR");                ins = blob.getBinaryStream();            }            File file = new File("test.jar");            OutputStream os = new FileOutputStream(file);            byte[] bt = new byte[1024];            int size = 0;            while((size=ins.read(bt))!=-1){                os.write(bt,0,size);            }            os.flush();            os.close();            ins.close();                        URLClassLoader loader = new URLClassLoader(new URL[]{
   new URL("file:"+file.getAbsolutePath())});            Class cs = loader.loadClass("com.tf.userApp.bean.Exterior");            Object obj = cs.newInstance();                        Method[] methods = obj.getClass().getMethods();            for(Method method : methods){                if(method.getName().equals("add")){                    Class[] css = method.getParameterTypes();                    Object[] params = new Object[css.length];                    params[0] = ys;                    params[1] = csd;                    params[2] = jg;                    params[3] = sf;                    params[4] = yf;                    params[5] = sd;                    /**                    int index = 0;                    for(Class cs : css){                        if(String.class == cs){                            params[index++] = "String val is :" + index;                        }                    }*/                    Object rt = method.invoke(obj, params);                    if(rt.getClass() == Integer.class){                        result = String.valueOf((Integer)rt);                    }else if(rt.getClass()==String.class){                        result = (String)rt;                    }                }            }        }catch (Exception e) {            e.printStackTrace();        }                return result;    }