我有一个Java EE应用程序,其中有许多使用相同模式的Web服务:
public Response myWebService1() {
try {
// do something different depending on the web service called
} catch (MyCustomException e1) {
return Response.status(409).build();
} catch (UnauthorizedException e2) {
return Response.status(401).build();
} catch (Exception e3) {
return Response.status(500).build();
}
}
这可以分解这段代码吗？
我尝试使用带有websocket的Spring.我开始使用本教程进行调查.
在我的客户端,我有类似的东西来初始化与服务器的连接:
function connect() {
var socket = new SockJS('/myphotos/form');
stompClient = Stomp.over(socket);
stompClient.connect({}, function(frame) {
setConnected(true);
console.log('Connected: ' + frame);
stompClient.subscribe('/topic/greetings', function(greeting){
showGreeting(JSON.parse(greeting.body).content);
});
});
}
它很棒,在我的控制器中我可以在下面的类中完成我的过程:
@Controller
@RequestMapping("/")
public class PhotoController {
@MessageMapping("/form")
@SendTo("/topic/greetings")
public Greeting validate(AddPhotosForm addPhotosForm) {
return new Greeting("Hello world !");
}
}
现在我想做的是让一个线程向客户端发送消息,收听"/ topic/greeting".我写了这样的Runnable类:
public class FireGreeting implements Runnable {
private PhotoController listener;
public FireGreeting(PhotoController listener) {
this.listener = listener;
}
@Override
public void run() {
while (true) {
try {
Thread.sleep( …我已将以下插件添加到pom.xml中的Maven构建中
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>xjc</goal>
</goals>
<configuration>
<extension>true</extension>
<clearOutputDir>false</clearOutputDir>
<schemaDirectory>${basedir}/src/main/resources/xsd</schemaDirectory>
<schemaFiles>myapp.xsd</schemaFiles>
<outputDirectory>${basedir}/src/main/java</outputDirectory>
<bindingDirectory>src/main/resources/xsd</bindingDirectory>
<bindingFiles>myapp-bindings.xjb</bindingFiles>
</configuration>
</execution>
</executions>
</plugin>
以下是构建错误.
[INFO] Ignored given or default xjbSources [C:\WorkSpace\MyApp\src\main\xjb], since it is not an existent file or directory.
[INFO] Ignored given or default sources [C:\WorkSpace\MyApp\src\main\xsd], since it is not an existent file or directory.
[WARNING] No XSD files found. Please check your plugin configuration.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.273s
[INFO] Finished at: Tue …我正在尝试发送带有cookie的帖子请求.这是代码:
try {
String query = URLEncoder.encode("key", "UTF-8") + "=" + URLEncoder.encode("value", "UTF-8");
String cookies = "session_cookie=value";
URL url = new URL("https://myweb");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setRequestProperty("Cookie", cookies);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes(query);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String decodedString;
while ((decodedString = in.readLine()) != null) {
System.out.println(decodedString);
}
in.close();
// Send the request to the server
//conn.connect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
问题是请求是在没有cookie的情况下发送的.如果我只做:conn.connect(); …
我是REST API的新手.我想使用REST API将用户选择的文件上传到用户提供的路径(远程或本地路径).我的html文件有1个文本框和1个文件选择器.用户将在文本框中输入FilePath(本地或远程计算机文件夹位置).请提出如何解决此问题的建议.
这是我的代码:
FileUpload.html ::
<body>
<form action="rest/file/upload" method="post" enctype="multipart/form-data">
<p>
Select a file : <input type="file" name="file" size="45" />
</p>
<p>Target Upload Path : <input type="text" name="path" /></p>
<input type="submit" value="Upload It" />
</form>
</body>
UploadFileService.java
@Path("/file")
public class UploadFileService {
@POST
@Path("/upload")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(
@FormDataParam("file") InputStream uploadedInputStream,
@FormDataParam("file") FormDataContentDisposition fileDetail,
@FormParam("path") String path) {
/*String uploadedFileLocation = "d://uploaded/" + fileDetail.getFileName();*/
/*String uploadedFileLocation = //10.217.14.88/Installables/uploaded/" + fileDetail.getFileName();*/
String uploadedFileLocation = path
+ fileDetail.getFileName();
// save it …假设我有两个类A,B并且扩展了A.用下面的方法我可以打印Collection的A或延长的东西A:
private static void print(Collection<? extends A> collection) {
for (A element : collection) {
System.out.println(element);
}
}
太棒了,我可以这样做:
public static void main(String[] args) {
List<A> l1 = new ArrayList<>();
l1.add(new A());
l1.add(new B());
print(l1);
List<B> l2 = new ArrayList<>();
l2.add(new B());
l2.add(new B());
print(l2);
}
现在我的问题是为什么在我的方法main(或其他地方)我可以写这个
List<? extends A> l3 = new ArrayList<>();
但不是这个
l3.add(new A());
l3.add(new B());
我明白为什么我不能添加A或B在中的实例l3.但为什么第一个似乎无用的声明被授权呢？ …
我目前正在我的项目中使用带有打字稿的angular 2.我已经研究了angularjs的一些内联编辑器,并发现了 angular-xeditable.但是这个插件适用于angularjs 1.
是否有任何方法可以使用角2？或者另一种替代方案,例如x-editable for angular 2
我想简单的内联编辑器与编辑按钮.
PS我不希望js内联编辑器插件为此而不是角度的一部分(不是angularjs模块)
我实现了一个通过Web服务访问的自定义loginModule,并检查JPA访问的数据库前面的用户名和密码.我在jboss 7.1上运行它并且它工作正常,但在将它移动到Wildfly(并添加我认为正确的配置)后,我得到了一个源自wildfly类内部的NullPointerException.有任何想法吗？
18:48:21,417 ERROR [io.undertow.request] (default task-3) UT005023: Exception handling request to /jass.ws/jaas/verifier/authenticateWithBasicUsernamePasswordAuth: java.lang.RuntimeException: java.lang.NullPointerException
at org.wildfly.extension.undertow.security.JAASIdentityManagerImpl.verifyCredential(JAASIdentityManagerImpl.java:126)
at org.wildfly.extension.undertow.security.JAASIdentityManagerImpl.verify(JAASIdentityManagerImpl.java:82)
at io.undertow.security.impl.BasicAuthenticationMechanism.authenticate(BasicAuthenticationMechanism.java:110) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:281) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:298) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:268) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:131) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:106) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:99) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.handlers.AuthenticationCallHandler.handleRequest(AuthenticationCallHandler.java:50) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.0.Final.jar:1.0.0.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) …我正在构建自己的AuthorizingRealm子类,并且很难将它连接到我的子类SecurityManager.
我的境界的本质:
public class MyRealm extends AuthorizingRealm {
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
try {
// My custom logic here
} catch(Throwable t) {
System.out.println(t.getMessage());
}
SimpleAuthenticationInfo authn = new SimpleAuthenticationInfo(new MyUser(), "somePassword");
return authn;
}
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
try {
// My custom logic here
} catch(Throwable t) {
System.out.println(t.getMessage());
}
return new SimpleAuthorizationInfo();
}
}
然后在我的'shiro.ini'中:
# =======================
# Shiro INI configuration
# =======================
[main]
myRealm = com.me.myapp.security.MyRealm
然后在我的Driver类/ main方法中(我用于测试): …
我在Windows上使用Eclipse,我不明白它为什么使用特定的java版本.我可以使用Eclipse查看java版本,执行此帮助 - >关于Eclipse - >安装详细信息 - >配置.该java.home设置为C:\ Program Files文件\的Java\jre1.8.0_65.但我的环境变量配置如下:
为什么Eclipse没有使用C:\ java\jdk1.8.0_60作为java.home.