實現原理：通過傳遞服務bean的名稱、執行的方法及引數，通過反射機制進行呼叫返回。
優點：只需對外提供一個介面服務即可，只要容器中操作服務bean,通過介面即可呼叫，增加服務bean無需增加對外介面。
程式碼如下：
介面類
public interface ProxyService {
/**
* webservice呼叫代理
* @param beanName bean或類名
* @param functionName 呼叫的函式名
* @param params 引數
* @return
* @throws Exception
*/
Object proxy(String beanName, String functionName,String… params) throws Exception;
}
實現類：
服務基於spring,為了方便獲取服務bean,實現類實現spring的'ApplicationContextAware介面
@Service
public class ProxyServiceImpl implements ProxyService ,ApplicationContextAware{
protected final Logger logger = ogger(getClass());
@Resource
private ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
icationContext = applicationContext;
}
/**
* 通過代理執行業務方法，方法資料
*/
@SuppressWarnings("rawtypes")
@Override
public Object proxy(String beanName, String functionName, String… params) throws ServiceException {
//引數判斷
if(pty(beanName)){
throw new Exception("error: beanName is empty.");
}
if(pty(functionName)){
throw new Exception("error: functionName is empty.");
}
//獲取服務bean
Object bean = getBean(beanName);
if(bean == null){
throw new Exception("error: bean is not exist.");
}
if(params == null || th ==0){
("proxy params is empty.");
}
Method method = null;
//處理無引數呼叫
if(params == null || th ==0){
try {
//獲取服務bean方法
method = lass()。getMethod(functionName);
} catch (SecurityException e) {
r("proxy getMethod SecurityException:"+essage());
tStackTrace();
} catch (Exception e) {
r("proxy invoke IllegalArgumentException:"+essage());
tStackTrace();
throw new Exception("error: get method Exception:"+essage());
}
}else{
//處理有引數呼叫
//處理呼叫方法引數
Class[] paraTypes = new Class[th];
for (int i = 0; i < th; i++) {
paraTypes[i] = s;
}
//獲取服務bean方法
method = lass()。getMethod(functionName, paraTypes);
}catch (Exception e) {
r("proxy invoke IllegalArgumentException:"+essage());
tStackTrace();
throw new Exception("error: get method Exception:"+essage());
}
}
if(method == null ){
throw new Exception("error: function is not exist.");
}
Object rs = null;
try {
//呼叫返回資料
rs = ke(bean,params);
} catch (Exception e) {
r("proxy invoke IllegalArgumentException:"+essage());
tStackTrace();
throw new Exception("error: invoke method Exception:"+essage());
}
return rs;
}
/**
* 獲取bean物件
* @param beanName
* @return
*/
private Object getBean(String beanName){
Object bean = null;
bean = ean(beanName);
if(bean == null){
try {
Class classe = ame(beanName);
bean = nstance();
} catch (InstantiationException e) {
r("getBean InstantiationException:"+essage());
tStackTrace();
} catch (IllegalAccessException e) {
r("getBean IllegalAccessException:"+essage());
tStackTrace();
}catch ( ClassNotFoundException e) {
r("getBean ClassNotFoundException:"+essage());
