gwt2.8beta1-尝试使用jsinterop从javascript调用java方法

我正试图使用最新的JsInterop从javascript调用一个gwt方法-下面是我的html 的头部

<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--                                                               -->
<!-- Consider inlining CSS to reduce the number of requested files -->
<!--                                                               -->
<link type="text/css" rel="stylesheet" href="Home.css">
<!--                                           -->
<!-- Any title is fine                         -->
<!--                                           -->
<title>Web Application Starter Project</title>
<!--                                           -->
<!-- This script loads your compiled module.   -->
<!-- If you add any GWT meta tags, they must   -->
<!-- be added before this line.                -->
<!--                                           -->
<script type="text/javascript" language="javascript"    src="Home/Home.nocache.js"></script>
</head>

下面是我的html 的主体部分

<body onload="myFunction()">
<script >
function myFunction(){
    alert("something to say");
    var foo = new host.Employee();
    foo.hello("Gautam");
}
</script>
<!-- RECOMMENDED if your web app will not function without JavaScript  enabled -->
<h1>Web Application Starter Project</h1>
<table align="center">
  <tr>
    <td colspan="2" style="font-weight:bold;">Please enter your name:</td>
  </tr>
  <tr>
    <td id="nameFieldContainer"></td>
    <td id="sendButtonContainer"></td>
    <td id="someButton"><input type="button" value="SomeValue"  onclick=myFunction()/></td>
  </tr>
  <tr>
    <td colspan="2" style="color:red;" id="errorLabelContainer"></td>
  </tr>
</table>
</body>

这是java类

import com.google.gwt.user.client.Window;
import jsinterop.annotations.JsMethod;
import jsinterop.annotations.JsType;
@JsType(namespace = "host" , name = "Employee" )
public class Employee implements Serializable {
private String name ;
private int age ;
private long salary ;
@JsMethod(name = "hello")
public String sayHello(String name){
    String last = "Hello " + name ;  
    Window.alert(last);
    return last ;
}
}

在浏览器中，将调用body onload=myFunction（），并始终显示第一个警报。

但是单击按钮someValue会显示来自myFunction的第一个警报，但会显示预期的主机。Employee（）始终显示未定义的

Home.html:47 Uncaught ReferenceError: host is not defined

你能告诉我这里出了什么问题吗？

我正在使用用于2.8.0-beta1的gwt-maven插件进行构建。

更新-这是我的pom内容4.0.0

  <parent>
    <artifactId>bi-parent-client</artifactId>
    <groupId>com.pa.bi</groupId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <groupId>com.pa.bi</groupId>
  <artifactId>bi-gwt-host</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>Maven Archetype for GWT</name>
<properties>
<!-- Convenience property to set the GWT version -->
<gwtVersion>2.8.0-beta1</gwtVersion>
<!-- GWT needs at least java 1.7 -->
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencyManagement>
<dependencies>
  <dependency>
    <groupId>com.google.gwt</groupId>
    <artifactId>gwt</artifactId>
    <version>${gwtVersion}</version>
    <type>pom</type>
    <scope>import</scope>
  </dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
  <groupId>com.google.gwt</groupId>
  <artifactId>gwt-servlet</artifactId>
  <scope>runtime</scope>
</dependency>
<dependency>
  <groupId>com.google.gwt</groupId>
  <artifactId>gwt-user</artifactId>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>com.google.gwt</groupId>
  <artifactId>gwt-dev</artifactId>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.11</version>
  <scope>test</scope>
</dependency>
</dependencies>
<build>
<!-- Output classes directly into the webapp, so that IDEs and "mvn process- classes" update them in DevMode -->
<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
<plugins>
  <!-- Mojo's Maven Plugin for GWT -->
  <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>gwt-maven-plugin</artifactId>
    <version>2.8.0-beta1</version>
    <executions>
      <execution>
        <goals>
          <goal>compile</goal>
          <goal>test</goal>
          <goal>generateAsync</goal>
        </goals>
      </execution>
    </executions>
    <!-- Plugin configuration. There are many available options, see 
      gwt-maven-plugin documentation at codehaus.org -->
    <configuration>
      <runTarget>Home.html</runTarget>
      <modules>
        <module>com.pa.bi.gwt.host.Home</module>
      </modules>
      <copyWebapp>true</copyWebapp>
    </configuration>
  </plugin>
</plugins>
</build>
</project>

我添加了

<add-linker name="xsiframe" />
<set-configuration-property name="devModeRedirectEnabled"
    value="true" />

到我的Home.gwt.xml模块文件。但仍然没有运气

更新-

删除了jsInterOpMode标志并添加了

<generateJsInteropExports>true</generateJsInteropExports>

我的maven gwt:run抛出了一个奇怪的错误-

[ERROR] Unable to find 'JS_RC.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?

这通常意味着我需要继承一个模块，我在github上的gwt项目中寻找这样的模块，但到目前为止运气不佳。

当将-generateJsInteropExports与SDM一起使用时，这是GWT 2.8.0-beta1中已知的问题；已修复但尚未发布：https://github.com/gwtproject/gwt/issues/9223

尝试使用GWT2.8.0-SNAPSHOT.

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