无法使用TestRestTemplate Jar Conflict测试Spring Boot Jersey Rest API

Question

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@Import({ JerseyConfig.class })
public class BenchApplicationTest {

@Autowired
private TestRestTemplate restTemplate;

@Test
public void contextLoads() {

    ResponseEntity<String> entity = this.restTemplate.getForEntity("/bench/healthcheck", String.class);
    assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);

  }

}

我的应用程序执行完美，我能够使用Postman测试api 。 但是，当我尝试上述方法执行测试用例以测试API时，会出现以下错误。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testRestTemplate': Initialization of bean failed; nested exception is java.lang.NoSuchFieldError: INSTANCE
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
.....
Caused by: java.lang.NoSuchFieldError: INSTANCE
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:144) ~[httpclient-4.5.2.jar:4.5.2]
at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:962) ~[httpclient-4.5.2.jar:1.2.2]

我尝试检查此错误，几乎所有错误都表明（如此链接和链接 ），我的应用程序中有多个jars版本（http-client / http-core）。 我已经检查过，但在我的应用程序中找不到多个版本的SSLConnectionSocketFactory 。 如果根本有冲突的罐子，我怎么知道哪个在冲突。 我没有手动添加jar，它是一个maven项目。 在过去的1周中，我一直困扰于这个问题，现在我机智了。

请在下面找到我的pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.2.RELEASE</version>
</parent>
<dependencies>
    <!-- Spring dependencies -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jersey</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-json</artifactId>
        <version>1.18.1</version>
    </dependency>
    <dependency>
        <groupId>org.antlr</groupId>
        <artifactId>antlr-complete</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.zaxxer</groupId>
        <artifactId>HikariCP</artifactId>
    </dependency>
    <dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.3.2</version>
    </dependency>
    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
    </dependency>
    <dependency>
        <groupId>commons-validator</groupId>
        <artifactId>commons-validator</artifactId>
        <version>1.4.1</version>
    </dependency>

    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-multipart</artifactId>
        <version>1.19.3</version>
    </dependency>
    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>org.jsoup</groupId>
        <artifactId>jsoup</artifactId>
        <version>1.7.2</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
    </dependency>
    <dependency>
        <groupId>org.antlr</groupId>
        <artifactId>antlr-complete</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>com.rabbitmq</groupId>
        <artifactId>amqp-client</artifactId>
        <version>2.8.6</version>
    </dependency>
    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-all</artifactId>
        <version>1.9.0</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc6</artifactId>
        <version>11.2.0.4</version>
    </dependency>
    <dependency>
        <groupId>org.owasp.esapi</groupId>
        <artifactId>esapi</artifactId>
        <version>2.1.0</version>
    </dependency>
    <dependency>
        <groupId>com.sun.mail</groupId>
        <artifactId>javax.mail</artifactId>
    </dependency>
    <dependency>
        <groupId>org.freemarker</groupId>
        <artifactId>freemarker</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-jcs-jcache</artifactId>
        <version>2.0-beta-1</version>
    </dependency>
    <dependency>
        <groupId>org.reflections</groupId>
        <artifactId>reflections</artifactId>
        <version>0.9.9</version>
    </dependency>
    <dependency>
        <groupId>com.codahale.metrics</groupId>
        <artifactId>metrics-healthchecks</artifactId>
        <version>3.0.1</version>
    </dependency>
    <dependency>
        <groupId>com.googlecode.json-simple</groupId>
        <artifactId>json-simple</artifactId>
    </dependency>
</dependencies>

任何帮助，将不胜感激。

Answer 1

快速回答

快速检查pom.xml显示特定的依赖项org.owasp.esapi:esapi将旧的3.1版本的httpclient拉入其中。请尝试按如下所述向此依赖项添加排除部分。 如果这样做没有帮助，请相应地遍历依赖树

完整答案

在您的项目根文件夹下运行以下命令

mvn dependency:tree -Dincludes=commons-httpclient

这将打印项目的maven依赖关系树，其中包含所有具有工件ID commons-httpclient拉动传递依赖关系，例如：

[INFO] your:project:jar:1.0-SNAPSHOT
[INFO] \- org.owasp.esapi:esapi:jar:2.1.0:compile
[INFO]    \- org.owasp.antisamy:antisamy:jar:1.4.3:compile
[INFO]       \- commons-httpclient:commons-httpclient:jar:3.1:compile

比您可以确定org.owasp.esapi:esapi的httpclient错误版本的源是什么（在我们的示例中为org.owasp.esapi:esapi ），然后可以通过修改pom.xml隐式排除该传递依赖项：

        <dependency>
            <groupId>org.owasp.esapi</groupId>
            <artifactId>esapi</artifactId>
            <version>2.1.0</version>
            <!-- change starts here -->
            <exclusions>
                <exclusion>
                    <groupId>commons-httpclient</groupId>
                    <artifactId>commons-httpclient</artifactId>
                </exclusion>
            </exclusions>
            <!-- change ends here -->
        </dependency>

请注意，您可能需要使用通配符（例如

mvn dependency:tree -Dincludes=*http*

甚至通过调用mvn dependency:tree纯树输出来工作

最后，您最终可以在pom.xml中显式添加所需的依赖项，从而发现并排除了错误的版本（如上所述）：

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.2</version>
</dependency>

更新

由于上述问题无法解决。 方便的代码段，用于确定从类路径加载的所有文件：

ClassLoader cl = ClassLoader.getSystemClassLoader();

URL[] urls = ((URLClassLoader)cl).getURLs();

for(URL url: urls){
    System.out.println(url.getFile());
}

您可以在restTemplate调用之前将其放到contextLoads()然后检查/共享控制台输出吗？