我在尝试使用 Spring Framework 和 Spring Security + Jersey 设置 .RESTFUL API 时遇到了一些问题
我可以部署 Jersey REST API 并成功请求资源，但是当我还实现了 Spring(框架 + Spring 安全性)时，事情就变得失控了。
我以前使用过旧的 Spring 版本，其中配置是使用 XML 文件进行的，但我想尝试并学习如何使用 配置它仅限 Java 注释。我遇到了麻烦，因为我无法通过 applicationContext.xml。我只是不想放置 XML 文件，我只想仅使用 Java 注释配置我的小型 Rest api Web 应用程序。
当我将 Spring Security 配置行添加到我的 web.xml 并尝试请求任何资源时，出现此错误:
未找到 WebApplicationContext:未注册 ContextLoaderListener 或 DispatcherServlet？
因此，我还将此代码段添加到了我的 web.xml 中:
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
然后，我为 Spring 创建了一个新的配置类，一个简单的:
@Configuration
@ComponentScan({
"com.myapp.rest.api",
"com.myapp.business.services"
})
public class SpringApplicationConfig {
}
我再次重新启动我的 Tomcat 并尝试请求任何资源，然后它开始提示找不到 applicationContext.xml 文件，我没有提供，但我不知道为什么如果我有另一个带有 @Configuration 注释的类，它仍然试图找到它。如何在不使用 applicationContext.xml 的情况下配置 Spring？
注意:我知道 Spring MVC 和 Spring Boot，但我目前正在使用 Jersey > 并使用 Spring Framework 进行依赖注入(inject)，显然还使用 Spring Security 进行身份验证和安全性工作。
在我的web.xml下面:
<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.myapp.rest.api</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
<!-- SPRING SECURITY -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
还有我的pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myapp</groupId>
<artifactId>api</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>api</name>
<build>
<finalName>my api</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- JERSEY (2) -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
</dependency>
<!-- Soporte JSON -->
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
<!-- SPRING + SPRING SECURITY -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring-security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring-security.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<!-- JACKSON - JSON -->
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- LOG4J2 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- JWT TOKEN -->
<dependency>
<groupId>com.nimbusds</groupId>
<artifactId>nimbus-jose-jwt</artifactId>
<version>${jose.jwt.version}</version>
</dependency>
</dependencies>
<properties>
<jose.jwt.version>4.39.2</jose.jwt.version>
<spring-security.version>4.2.3.RELEASE</spring-security.version>
<spring.version>4.3.9.RELEASE</spring.version>
<log4j.version>2.8.2</log4j.version>
<jersey.version>2.9.1</jersey.version>
<jackson.version>2.8.9</jackson.version>
<servlet-api.version>3.1.0</servlet-api.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
最佳答案
您缺少 web.xml 中的一些重要点
// For java config, you don't want to use .xml
// you have to include AnnotationConfigWebApplicationContext
<context-param>
<param-name>contextClass</param-name>
<param-value>
org.springframework.web.context.support.AnnotationConfigWebApplicationContext
</param-value>
</context-param>
// Location of your Configuration class
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>my.package.AppConfig</param-value>
</context-param>
// To load context
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
// Spring Servlet
<servlet>
<servlet-name>SpringApplication</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
// Your controllers
<init-param>
<param-name>jersey.config.server.provider.classnames</param-name>
<param-value>my.package.controllers.HomeController</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
// Servlet url mapping
<servlet-mapping>
<servlet-name>SpringApplication</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
添加 Controller 类
@Component
@Path("/home")
public class HomeController {
更新: 据了解，问题的作者只对 Spring DI 感兴趣，不涉及 Spring MVC，下面是简单的配置引导 WebApplicationInitializer 以编程方式配置 ServletContext，无需 web.xml。请注意，这需要 Servlet 3.0+ 容器。
public class ApplicationInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext context
= new AnnotationConfigWebApplicationContext();
servletContext.addListener(new ContextLoaderListener(context));
servletContext.setInitParameter(
"contextConfigLocation", "com.package.my");
}
}
关于java - 使用 Java 配置 Spring RESTFUL API webapp，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45084061/