@RequestMapping("/testJar")public @ResponseBody String exteriorJar(int ys, int csd,int jg,int sf,int yf,intsd){

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= newFileOutputStream(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= newObject[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();

}returnresult;

}