技術標籤：尚籌網專案java

異常提示:

java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
	at java.lang.Class.getMethod0(
 
Class.java:3018)
	at java.lang.Class.getMethod(Class.java:1784)
	at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest
	at java.
 
net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 7 more
Error: A JNI error has occurred, please check your installation and try
 
 again
Exception in thread "main" 

看這網上的方法進行檢查:
版本號一致.

對pom.xml進行檢查:

    <groupId>com.atguigu.crowd</groupId>
    <artifactId>atcrowdfunding05-common-util</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <dependencies>

        <!-- 引入 Servlet 容器中相關依賴 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <!--傳送簡訊呼叫第三方api所需的依賴-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.15</version>
        </dependency>
        <!--當前環境本身就有httpclient的依賴,這裡不寫版本號就能夠使用已有的版本,避免因為版本不一致而產生衝突-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.9</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-util</artifactId>
            <version>9.4.19.v20190610</version>
        </dependency>

        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>

        <!-- OSS 客戶端 SDK -->
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
            <version>3.5.0</version>
        </dependency>

    </dependencies>

最後把servlet-api對應的jar包從

 <scope>provided</scope>

改為了

 <scope>compile</scope>

再執行,問題得到了解決…

雖然問題得到了解決,但為什麼這樣的原因尚未知