Java 当我启动Spring项目时，controller方法将被调用三次_Java_Spring_Spring Mvc_Intellij Idea

Java 当我启动Spring项目时，controller方法将被调用三次

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Java 当我启动Spring项目时，controller方法将被调用三次,java,spring,spring-mvc,intellij-idea,Java,Spring,Spring Mvc,Intellij Idea,我使用的是Spring 4.2.5。当我第一次运行Spring项目并访问localhost时，映射的控制器方法将被调用三次。之后，当我访问localhost时，它只被调用一次如果你不明白我的意思，请评论，因为我的英语不是很好 public class AppWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { @Override protected Class<?>

我使用的是Spring 4.2.5。当我第一次运行Spring项目并访问

localhost

时，映射的控制器方法将被调用三次。之后，当我访问

localhost

时，它只被调用一次

如果你不明白我的意思，请评论，因为我的英语不是很好

public class AppWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[] { RootConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[] {
                WebConfig.class
        };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

    @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("utf-8");
        characterEncodingFilter.setForceEncoding(true);
        return new Filter[]{characterEncodingFilter};
    }

}

控制器

@Controller
public class HomeController {

    @Autowired
    private HttpLogin httpLogin;

    @RequestMapping(value = "/",method = RequestMethod.GET)
    public String home(){
        System.out.println("home");   //print three times ,when first called.
        return "home";
    }

}

我的pom.xml

<packaging>war</packaging>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring4</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.9.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

检查pom.xml，我认为一些依赖项或参数会被多次调用。例如，请确保此配置正确。应该在pom或其他配置文件中调用一次DispatcherServlet

即使如此，您也可以尝试使用此配置

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.company</groupId>
    <artifactId>test-proyect</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>     

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring4</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.9.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>    

</project>

AppWebInitializer.java

public class AppWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[] { WebConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[0];
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

}

公共类AppWebInitializer扩展了AbstractAnnotationConfigDispatcherServletInitializer{
@凌驾
受保护类[]getRootConfigClasses（）{
返回新类[]{WebConfig.Class}；
}
@凌驾
受保护类[]getServletConfigClasses（）{
返回新类[0]；
}
@凌驾
受保护的字符串[]getServletMappings（）{
返回新字符串[]{”/“}；
}
}

启动后，IntelliJ的

功能可以三次调用您的web应用程序。您的Spring配置没有问题。要解决此问题，只需转到IntelliJ中的编辑配置
，然后取消选中启动后的复选框：
我没有其他配置文件。我发布了pom.xml
。请帮我检查好，让我检查一下。运行控制台时，控制台上没有错误或警告？好的，您可以检查一下吗。它正常运行，只打印一次。您可以为调试级别的org.springframework.web
包添加一些日志吗？尝试删除configurer.enable（）在您的配置中。现在发生了什么？你是如何部署你的应用程序的？你在Tomcat上使用IntelliJ及其运行配置吗？是的。我在Tomcat上使用IntelliJ及其运行配置。你是英雄。我花了4个小时调试这个问题，它来自IntelliJ！为什么他妈的要打三次电话？不管怎样，你让我开心了，谢谢你。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.company</groupId>
    <artifactId>test-proyect</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>     

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.5.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring4</artifactId>
            <version>2.1.4.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.9.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>    

</project>

@Configuration
@EnableWebMvc
@ComponentScan("kyzs.web")
public class WebConfig extends WebMvcConfigurerAdapter{

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Bean
    UrlBasedViewResolver resolver(){
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();

        resolver.setPrefix("/WEB_INF/views/");
        resolver.setSuffix(".html");
        resolver.setViewClass(JstlView.class);

        return resolver;
    }

}

public class AppWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[] { WebConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[0];
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

}