Question

我正在尝试使用java配置运行一个简单的Spring MVC Web应用程序。但是当我在Tomcat上启动我的应用程序时（右键单击Project并在Server上运行），它无法按预期将我重定向到home.jsp。它给出的错误是请求的资源不可用。

以下是我从Spring in Action：Edition 4 book中复制的代码。

My Code Setup

以下是我尝试/检查的内容： 1.Tomcat起来了。我可以看到tomcat欢迎页面。

2.双击tomcat，设置＆＃34;服务器位置＆＃34;选项，＆＃34;使用Tomcat安装（控制tomcat安装）＆＃34;在Eclips。

3.部署大会：

/ src＆lt; - ＆gt; WEB-INF /类

/ WebContent＆lt; ---＆gt; /

4.这只是动态网络项目，没有专家。

5.我得到的错误： Error that I am getting

Dispatcher类：SpringWebInitializer.class

package config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class SpringWebInitializer extends
    AbstractAnnotationConfigDispatcherServletInitializer {

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

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

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

WebConfig.class

package config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan("config")
public class WebConfig extends WebMvcConfigurerAdapter {

@Bean
public ViewResolver viewResolver() {
    InternalResourceViewResolver resolver = new InternalResourceViewResolver();
    resolver.setPrefix("/WEB-INF/views/");
    resolver.setSuffix(".jsp");
    resolver.setExposeContextBeansAsAttributes(true);
    return resolver;
}

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

RootConfig.class

package config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@ComponentScan(basePackages={"config"},
excludeFilters={
 @Filter(type=FilterType.ANNOTATION, value=EnableWebMvc.class)
})
public class RootConfig {

}

HomeController.class

 package config;

import static org.springframework.web.bind.annotation.RequestMethod.*;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class HomeController {
@RequestMapping(value = "/", method = GET)
public String home() {
    return "home";
}
}

针对home.jsp：

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>

</head>
<body>
<h1>Welcome to Spittr</h1>
</body>
</html>

另请查找下面的tomcat日志：

127.0.0.1 - - [10/Sep/2016:11:18:19 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:18:21 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
127.0.0.1 - - [10/Sep/2016:11:21:56 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:21:56 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:22:15 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:22:15 +0530] "GET /favicon.ico HTTP/1.1" 200 21630
127.0.0.1 - - [10/Sep/2016:11:24:37 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:24:38 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:25:13 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
127.0.0.1 - - [10/Sep/2016:11:26:48 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:26:48 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
127.0.0.1 - - [10/Sep/2016:11:28:45 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:28:45 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:29:10 +0530] "GET /SpringMVC2/WEB-INF/views/home.jsp HTTP/1.1" 404 992
127.0.0.1 - - [10/Sep/2016:11:30:25 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:30:25 +0530] "GET /SpringMVC2/WEB-INF/classes/config/SpringWebInitializer.java HTTP/1.1" 404 992
127.0.0.1 - - [10/Sep/2016:11:31:49 +0530] "GET / HTTP/1.1" 200 11452
 0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:31:49 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:32:31 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:32:39 +0530] "GET /host-manager/html HTTP/1.1" 401 2100
0:0:0:0:0:0:0:1 - tomcat [10/Sep/2016:11:32:44 +0530] "GET /host-manager/html HTTP/1.1" 403 2857
127.0.0.1 - - [10/Sep/2016:11:33:54 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:33:54 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
127.0.0.1 - - [10/Sep/2016:11:39:42 +0530] "GET / HTTP/1.1" 200 11452
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:39:42 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:42:22 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016
127.0.0.1 - - [10/Sep/2016:11:43:33 +0530] "GET / HTTP/1.1" 200 11452
 0:0:0:0:0:0:0:1 - - [10/Sep/2016:11:43:34 +0530] "GET /SpringMVC2/ HTTP/1.1" 404 1016

Answer 1

您需要使用@Bean注释标记您的bean，这是一个配置类。

视图解析器应该用@Bean注释标记，这样它才能真正“开始”工作。

执行此操作后，您应该可以请求并查看您的home.jsp

Answer 2

好的，所以终于找到了解决方案。如果有人面临同样的问题，请离开这里。我已经使用构建路径添加了所有必需的JARS，但不确定为什么应用程序无法在运行时识别这些JARS。所以我手动将所有JARS复制到/ WEB-INF / lib文件夹。它开始工作了。

基于Java的Dispatcher Servlet：Controller无法找到jsp

2 个答案: