来自Rest API的Angular Consume数据

Question

我尝试使用Angular和jersey servlet从java服务中检索数据，但404 Not Found一直收到http://localhost:8080/ContactList/users错误。

这是我的app.js

angular.module('ContactList', ['ngRoute', 'ngResource', 'ngMessages'])
.config(function ($routeProvider, $locationProvider) {

    $locationProvider.html5Mode(true);

    $routeProvider
        .when('/ContactList', {
            controller: 'MyCtrl1',
            templateUrl: '/ContactList/resources/html/view.html'
        });
});

的web.xml

    <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/root-context.xml</param-value>
    </context-param>

    <!-- Creates the Spring Container shared by all Servlets and Filters -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Processes application requests -->
    <servlet>
        <servlet-name>appServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>appServlet</servlet-name>
        <url-pattern>/ContactList/*</url-pattern>
    </servlet-mapping>

</web-app>

controller.js

angular.module('ContactList')
.controller('MyCtrl1', ['$scope', 'UserFactory', function ($scope, UserFactory) {
UserFactory.get({}, function (userFactory) {
    $scope.firstname = userFactory.firstName;
})
}]);

Services.js

angular.module('ContactList')
.factory('UserFactory', function ($resource) {
return $resource('/ContactList/users', {}, {
    query: {
        method: 'GET',
        params: {},
        isArray: false
    }
})
});

最后是我的UserRestService.java

    import javax.ws.rs.GET;
    import javax.ws.rs.Path;
    import javax.ws.rs.Produces;
    import javax.ws.rs.core.MediaType;

    public class UserRestService {

    @RequestMapping(value = "/users", method = RequestMethod.GET)
    public User getDefaultUserInJSON() {
        UserService userService = new UserService();
        return userService.getDefaultUser();
    }
}

在我看来，我只想尝试输出Rest调用的结果：

Result from RESTful service is: {{ firstname }}

关于它为什么没有达到服务的任何想法？我最初的怀疑是我$resource中的services.js。

编辑 - Tomcat 7：运行错误

`Running war on http://localhost:8080/
[INFO] Creating Tomcat server configuration at C:\ContactList\target\tomcat
[INFO] create webapp with contextPath:
Feb 21, 2017 6:23:55 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Feb 21, 2017 6:23:55 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
Feb 21, 2017 6:23:55 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.47
Feb 21, 2017 6:23:55 PM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:192)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
        at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        ... 6 more
Caused by: java.lang.ClassCastException: org.springframework.web.SpringServletContainerInitializer cannot be cast to javax.servlet.ServletContainerInitializer
        at org.apache.catalina.startup.ContextConfig.getServletContainerInitializer(ContextConfig.java:1670)
        at org.apache.catalina.startup.ContextConfig.getServletContainerInitializers(ContextConfig.java:1652)
        at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1562)
        at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270)
        at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
`

的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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.wwt</groupId>
    <artifactId>ContactList</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <properties>
        <java-version>1.8</java-version>
        <org.springframework-version>3.1.0.RELEASE</org.springframework-version>
    </properties>
    <dependencies>

        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${org.springframework-version}</version>
            <exclusions>
                <!-- Exclude Commons Logging in favor of SLF4j -->
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.transaction</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.core</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.jdbc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>org.springframework.orm</artifactId>
            <version>${org.springframework-version}</version>
            <scope>test</scope>
        </dependency>

        <!-- Oracle driver -->
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.1.0</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.1.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.6.1</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
           <groupId>com.sun.jersey</groupId>
           <artifactId>jersey-server</artifactId>
           <version>1.9</version>
        </dependency>
       <dependency>
           <groupId>com.sun.jersey</groupId>
           <artifactId>jersey-servlet</artifactId>
           <version>LATEST</version>
       </dependency>
       <dependency>
           <groupId>com.sun.jersey</groupId>
           <artifactId>jersey-json</artifactId>
           <version>1.9</version>
       </dependency>
        <dependency>
            <groupId>com.owlike</groupId>
            <artifactId>genson</artifactId>
            <version>1.4</version>
        </dependency>

    </dependencies>

    <build>
       <finalName>ContactList</finalName>
       <plugins>
           <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.1</version>
               <configuration>
                   <source>${java-version}</source>
                   <target>${java-version}</target>
               </configuration>
          </plugin>
          <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-war-plugin</artifactId>
             <version>2.6</version>
             <configuration>
                <warName>ContactList</warName>
                <webappDirectory>../ContactList/target/ContactList</webappDirectory>
             </configuration>
          </plugin>
          <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-dependency-plugin</artifactId>
              <executions>
                  <execution>
                      <id>install</id>
                      <phase>install</phase>
                      <goals>
                          <goal>sources</goal>
                      </goals>
                  </execution>
              </executions>
          </plugin>
          <plugin>
              <groupId>org.apache.tomcat.maven</groupId>
              <artifactId>tomcat7-maven-plugin</artifactId>
              <version>2.2</version>
              <configuration>
                  <path>/${project.build.finalName}</path>
              </configuration>
          </plugin>
       </plugins>
    </build>

</project>`

Answer 1

跟进我们原来的问题评论。

首先，请删除@Path("/") getDefaultUserInJSON，因为它不需要。

其次，这是部署到Tomcat的问题。检查正在部署的战争中，文件WEB-INF / web.xml与项目中的内容相同。但是，让我们尝试一下，让我们运行Tomcat，让它运行起来。 如果您尚未安装Maven，则需要安装Maven 。

以下是最小的pom文件。只需复制它：

<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.wwt</groupId>
    <artifactId>RestTest</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>RestTest Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.8</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.8</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>RestTest</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

现在，只需打开项目根文件夹上的终端并执行mvn clean install tomcat7:run即可。你应该能够毫无问题地点击http://localhost:8080/ContactList/users

在你的pom中尝试更新以下依赖项（添加<scope>provide</scope>），看看是否能解决它。

<dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>javax.servlet-api</artifactId>
   <version>3.0.1</version>
   <scope>provide</scope>
</dependency>