问题描述
Socketsocket=null;/***从连接中读取传入信息*/publicInputEntitygetTnputEntity(Socketsocket){this.socket=socket;ObjectInputStreamobjectInputStream=null;InputEntityinputEntity=newInputEntity();try{objectInputStream=newObjectInputStream(socket.getInputStream());}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("获取连接异常");e.printStackTrace();}try{Objectobject=objectInputStream.readObject();System.out.println(object);inputEntity=(InputEntity)object;}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}catch(ClassNotFoundExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}try{socket.close();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}returninputEntity;下面的是客户端ObjectOutputStreamobjectOutputStream=newObjectOutputStream(socket.getOutputStream());InputEntityinputEntity=newInputEntity();inputEntity.setHandle("F_id");inputEntity.setId(123);objectOutputStream.writeObject(inputEntity);objectOutputStream.flush();求大神解答啊
解决方案
解决方案二：
java.lang.ClassNotFoundException:com.chenkai.test.InputEntityatjava.net.URLClassLoader$1.run(URLClassLoader.java:200)atjava.security.AccessController.doPrivileged(NativeMethod)atjava.net.URLClassLoader.findClass(URLClassLoader.java:188)atjava.lang.ClassLoader.loadClass(ClassLoader.java:307)atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)atjava.lang.ClassLoader.loadClass(ClassLoader.java:252)atjava.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)atjava.lang.Class.forName0(NativeMethod)atjava.lang.Class.forName(Class.java:247)atjava.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)atjava.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)atjava.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)atjava.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)atjava.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)atjava.io.ObjectInputStream.readObject(ObjectInputStream.java:351)atcom.forward.five.jokebll.JokeHandle.getTnputEntity(JokeHandle.java:53)atcom.forward.five.jokebll.JokeSocket.run(JokeSocket.java:44)Exceptioninthread"Thread-1"java.lang.NullPointerExceptionatcom.forward.five.jokebll.JokeHandle.dataHandle(JokeHandle.java:91)atcom.forward.five.jokebll.JokeSocket.run(JokeSocket.java:45)Exceptioninthread"main"java.lang.NullPointerExceptionatcom.forward.five.jokebll.StartTest.main(StartTest.java:40)这是报错
解决方案三：
解决方案四：
解决方案五：
Objectobject=objectInputStream.readObject();System.out.println(object);inputEntity=(InputEntity)object;这种问题调试一下就可以确认！红色部分的代码得到的object没有判断是否为空就直接强转成InputEntity对象。还有你用把代码写全了格式化一下，吧socket获取连接对象那里的代码贴出来。
解决方案六：
publicvoidrun(){while(flag){JokeHandlejokeHandle=newJokeHandle();try{socket=serverSocket.accept();}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("获取连接错误");e.printStackTrace();}InputEntityinputEntity=jokeHandle.getTnputEntity(socket);jokeHandle.dataHandle(inputEntity);if(jokeHandle.fileOuputEntity!=null){jokeHandle.sendEntity(jokeHandle.fileOuputEntity);}elseif(jokeHandle.userOutputEntity!=null){jokeHandle.sendEntity(jokeHandle.userOutputEntity);}elseif(jokeHandle.flist!=null){jokeHandle.sendEntity(jokeHandle.flist);}else{System.out.println("执行错误！！");}}publicclassJokeHandle{/****///声明返回的实体类对象FileOuputEntityfileOuputEntity=null;UserOutputEntityuserOutputEntity=null;List<FileOuputEntity>flist=null;Jokeblljokebll=newJokebll();Socketsocket=null;/***从连接中读取传入信息*/publicInputEntitygetTnputEntity(Socketsocket){this.socket=socket;ObjectInputStreamobjectInputStream=null;InputEntityinputEntity=newInputEntity();try{objectInputStream=newObjectInputStream(newBufferedInputStream(socket.getInputStream()));}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("获取连接异常");e.printStackTrace();}Objectobject=null;try{object=objectInputStream.readObject();}catch(IOExceptione1){//TODOAuto-generatedcatchblocke1.printStackTrace();}catch(ClassNotFoundExceptione1){//TODOAuto-generatedcatchblocke1.printStackTrace();}System.out.println(object);if(object!=null){inputEntity=(InputEntity)object;try{objectInputStream.close();socket.close();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}}returninputEntity;}/***数据操作*/@SuppressWarnings("null")publicvoiddataHandle(InputEntityinputEntity){Stringhandle=inputEntity.getHandle();Stringtype=inputEntity.getType();Stringemail=inputEntity.getEmail();Stringname=inputEntity.getName();Stringpassword=inputEntity.getPassword();longtel=inputEntity.getTel();longid=inputEntity.getId();longuid=inputEntity.getUid();Stringreview=inputEntity.getReview();if(handle.equals("F_type")){FileOuputEntityfileOnputEntity=null;flist=newArrayList<FileOuputEntity>();List<FilesEntity>filesEntities=jokebll.fTypeSelect(type);for(inti=0;i<filesEntities.size();i++){FilesEntityfilesEntity=newFilesEntity();filesEntity=filesEntities.get(i);BufferedImageimage=null;BufferedImagebufferedImage=null;try{image=ImageIO.read(newFile(filesEntity.getUrl()));bufferedImage=smallimage(image);}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("打开图片文件失败");e.printStackTrace();}byte[]imageBytes=null;byte[]bufferimagebytes=null;ByteArrayOutputStreambaos=newByteArrayOutputStream();ByteArrayOutputStreambufferbaos=newByteArrayOutputStream();try{ImageIO.write(image,"jpg",baos);ImageIO.write(bufferedImage,"jpg",bufferbaos);}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("图片生成流失败");e.printStackTrace();}imageBytes=baos.toByteArray();bufferimagebytes=bufferbaos.toByteArray();List<Review>lrList=jokebll.selectFileOfId(null,0,filesEntity.getId());fileOnputEntity.setId(filesEntity.getId());fileOnputEntity.setExplains(filesEntity.getExplains());fileOnputEntity.setFavorateNum(filesEntity.getFavoritenum());fileOnputEntity.setImage(imageBytes);fileOnputEntity.setBimage(bufferimagebytes);fileOnputEntity.setReviews(lrList);flist.add(fileOnputEntity);}}elseif(handle.equals("F_id")){FilesEntityfilesEntity=null;List<Object>olistList=jokebll.fidSelect(id);for(inti=0;i<olistList.size();i++){if(i==0){filesEntity=(FilesEntity)olistList.get(i);BufferedImageimage=null;BufferedImagebufferedImage=null;try{image=ImageIO.read(newFile(filesEntity.getUrl()));bufferedImage=smallimage(image);}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("打开图片文件失败");e.printStackTrace();}byte[]imageBytes=null;byte[]bufferimagebytes=null;ByteArrayOutputStreambaos=newByteArrayOutputStream();ByteArrayOutputStreambufferbaos=newByteArrayOutputStream();try{ImageIO.write(image,"jpg",baos);ImageIO.write(bufferedImage,"jpg",bufferbaos);}catch(IOExceptione){//TODOAuto-generatedcatchblockSystem.out.println("图片生成流失败");e.printStackTrace();}imageBytes=baos.toByteArray();bufferimagebytes=bufferbaos.toByteArray();List<Review>lrList=jokebll.selectFileOfId(null,0,filesEntity.getId());fileOuputEntity.setId(filesEntity.getId());fileOuputEntity.setExplains(filesEntity.getExplains());fileOuputEntity.setFavorateNum(filesEntity.getFavoritenum());fileOuputEntity.setImage(imageBytes);fileOuputEntity.setBimage(bufferimagebytes);fileOuputEntity.setReviews(lrList);}}}elseif(handle.equals("U_login")){UserEntityuserEntity=newUserEntity();userEntity=jokebll.uLogin(name,password);userOutputEntity.setId(userEntity.getId());userOutputEntity.setName(userEntity.getName());}elseif(handle.equals("U_sign")){UserEntityuserEntity=newUserEntity();userEntity.setName(name);userEntity.setPassword(password);userEntity.setEmail(email);userEntity.setTel(String.valueOf(tel));jokebll.uSign(userEntity);}elseif(handle.equals("U_version")){}elseif(handle.equals("U_review")){List<Review>reviews=jokebll.selectFileOfId(review,id,uid);fileOuputEntity.setReviews(reviews);}}/***生成缩略图**@parambufferedImage*@return*/privateBufferedImagesmallimage(BufferedImagebufferedImage){BufferedImageimage=bufferedImage;AffineTransformtransform=newAffineTransform();transform.setToScale((double)320/image.getWidth(),(double)400/image.getWidth());AffineTransformOpato=newAffineTransformOp(transform,null);BufferedImagenewimage=newBufferedImage(400,400*image.getHeight()/image.getWidth(),BufferedImage.TYPE_3BYTE_BGR);ato.filter(image,newimage);returnnewimage;}/***返回数据方法**@return*/publicbooleansendEntity(FileOuputEntityfileOuputEntitys){ObjectOutputStreamobjectOutputStream=null;try{objectOutputStream=newObjectOutputStream(socket.getOutputStream());objectOutputStream.writeObject(fileOuputEntitys);objectOutputStream.flush();objectOutputStream.close();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}returntrue;}publicbooleansendEntity(UserOutputEntityuserOutputEntitys){ObjectOutputStreamobjectOutputStream=null;try{objectOutputStream=newObjectOutputStream(socket.getOutputStream());objectOutputStream.writeObject(userOutputEntitys);objectOutputStream.flush();objectOutputStream.close();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}returntrue;}publicbooleansendEntity(List<FileOuputEntity>flists){ObjectOutputStreamobjectOutputStream=null;try{objectOutputStream=newObjectOutputStream(socket.getOutputStream());objectOutputStream.writeObject(flists);objectOutputStream.flush();objectOutputStream.close();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}returntrue;}}终于有大神回复了服务器的大体就是这样了