小编dex*_*lin的帖子

我在Spring Boot项目中有几个类,有些使用@Autowired,有些则没有.我的代码如下:

Application.java(@Autowired works):

package com.example.myproject;

@ComponentScan(basePackages = {"com.example.myproject"})
@Configuration
@EnableAutoConfiguration
@EnableJpaRepositories(basePackages = "com.example.myproject.repository")
@PropertySource({"classpath:db.properties", "classpath:soap.properties"})
public class Application {

@Autowired
private Environment environment;

public static void main(String[] args) {
    SpringApplication.run(Application.class);
}

@Bean
public SOAPConfiguration soapConfiguration() {
    SOAPConfiguration SOAPConfiguration = new SOAPConfiguration();
    SOAPConfiguration.setUsername(environment.getProperty("SOAP.username"));
    SOAPConfiguration.setPassword(environment.getProperty("SOAP.password"));
    SOAPConfiguration.setUrl(environment.getProperty("SOAP.root"));
    return SOAPConfiguration;
}

HomeController(@Autowired works):

package com.example.myproject.controller;

@Controller
class HomeController {

    @Resource
    MyRepository myRepository;

MyService(@Autowired不起作用):

package com.example.myproject.service;

@Service
public class MyServiceImpl implements MyService {

    @Autowired
    public SOAPConfiguration soapConfiguration; // is null

    private void init() { …

我的问题非常非常简单,但我在网上发现的一切都告诉我,我正在以正确的方式做到这一点 - 但我显然误解了一些事情.

我有一个简单,简单的Java ListIterator,它在while-hasNext() - 循环中为next()返回一个null.以下是我对调试状态的评论代码:

[...]
ListIterator<Role> rolesIterator = currentUser.getRoles().listIterator();
// rolesIterator is now: java.util.ArrayList$ListItr
while( rolesIterator.hasNext() ) {
        Role roleObject = rolesIterator.next(); // extra step for debugging reasons
        String role = roleObject.getName(); // NullPointerException - roleObject is null
[...]

在我的想法中,如果没有next()对象,则不应输入循环 - 这就是我使用hasNext()检查的原因.我理解错了什么,正确的方法是什么？

我尝试使用 Spring(-WS) 将 HTTP Basic Auth 凭据添加到我的 SOAP-Request 中。请求本身有效，但未提交任何凭据。HTTP 标头应如下所示：

[...]
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)
Authorization: Basic mybase64encodedtopsecretcredentials=

但最后一行并没有丢失。在 MyConfig.java 中，我配置 Bean（无 XML）：

@Bean
public WebServiceTemplate webServiceTemplate() {
    WebServiceTemplate template = new WebServiceTemplate();
    try {
        template.setMarshaller(marshaller());  //Jaxb2Marshaller
        template.setUnmarshaller(marshaller());

        // proxy for tcpmon inspection
        template.setDefaultUri("http://127.0.0.1:29080/target/webservice.php");
        String username = environment.getProperty("config.username");
        String password = environment.getProperty("config.password");
        Credentials credentials = new UsernamePasswordCredentials(username, password);
        HttpComponentsMessageSender sender = new HttpComponentsMessageSender();
        sender.setCredentials(credentials);
        sender.afterPropertiesSet();
        template.setMessageSender(sender);
    } catch (Exception e) {
        // @todo: handle me
    }
    return template; …