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import org.junit.Test;</p> <p>public class ConstructorTest {</p> <p> @Test @SuppressWarnings(“unchecked”)<br /> public void testConstructor(){<br /> try {<br /> Class clazz = Class.forName(“cn.vicky.utils.User”);<br /> Method method = clazz.getDeclaredMethod(“getName”);<br /> Constructor<? extends Live> constructor = clazz.getConstructor(String.class);<br /> System.out.println(method.invoke(constructor.newInstance(“Vicky”)));<br /> } catch (ClassNotFoundException e) {<br /> e.printStackTrace();<br /> } catch (SecurityException e) {<br /> e.printStackTrace();<br /> } catch (NoSuchMethodException e) {<br /> e.printStackTrace();<br /> } catch (IllegalArgumentException e) {<br /> e.printStackTrace();<br /> } catch (IllegalAccessException e) {<br /> e.printStackTrace();<br /> } catch (InvocationTargetException e) {<br /> e.printStackTrace();<br /> } catch (InstantiationException e) {<br /> e.printStackTrace();<br /> }<br /> }<br /> }</p> <p>abstract class Live{<br /> String name;</p> <p> public Live(String name) {<br /> this.name = name;<br /> }</p> <p> public String getName() {<br /> return name;<br /> }</p> <p>}</p> <p>class User extends Live{</p> <p> public User(String name) {<br /> super(name);<br /> }</p> <p> public String getName() {<br /> return ” —> ” +name;<br /> }</p> <p>}

打印:

—> Vicky

package cn.vicky.service.task;</p> <p>import java.io.Serializable;<br /> import java.lang.reflect.Constructor;<br /> import java.lang.reflect.Method;<br /> import java.util.Map;<br /> import java.util.logging.Logger;</p> <p>import cn.vicky.service.command.BaseCommand;</p> <p>import com.sun.sgs.app.AppContext;<br /> import com.sun.sgs.app.ManagedReference;<br /> import com.sun.sgs.app.Task;</p> <p>public class SolutionCommandTask implements Task, Serializable {</p> <p> private static final long serialVersionUID = 1L;<br /> private static final Logger logger = Logger.getLogger(SolutionCommandTask.class.getName());</p> <p> private String className;<br /> private String functionName;<br /> private Map mapMessage;<br /> private String username;<br /> private ManagedReference<Task[]> tasksRef;</p> <p> public SolutionCommandTask(String className, String functionName, Map mapMessage, String username,<br /> Task… tasks) {<br /> super();<br /> this.className = className;<br /> this.functionName = functionName;<br /> this.mapMessage = mapMessage;<br /> this.username = username;<br /> if (tasks.length > 0)<br /> this.tasksRef = AppContext.getDataManager().createReference(tasks);<br /> }</p> <p> public void run() throws Exception {</p> <p> long time1 = System.currentTimeMillis();</p> <p> try {<br /> Class clazz = Class.forName(className);<br /> Constructor<? extends BaseCommand> command;<br /> Method method = clazz.getMethod(functionName);<br /> // Method method = clazz.getDeclaredMethod(functionName);<br /> if (tasksRef == null) {<br /> command = clazz.getConstructor(Map.class, String.class);<br /> method.invoke(command.newInstance(mapMessage, username));<br /> } else {<br /> command = clazz.getConstructor(Map.class, String.class, Task[].class);<br /> method.invoke(command.newInstance(mapMessage, username, tasksRef.get()));<br /> }<br /> } catch (Exception e) {<br /> e.printStackTrace();<br /> logger.warning(“ReceivedMessageTask –> run –> ” + e.getMessage());<br /> }</p> <p> long time2 = System.currentTimeMillis();</p> <p> System.out.println(“SolutionCommandTask run() 耗时 ： ” + (time2 – time1));<br /> }</p> <p>}<br />