不使用JSP中的模型值

Question

我正在开发一个Spring应用程序。我的问题是，当视图出现时，它不会解析来自模型的值。

application.properties

spring.application.name=test-mvc
server.context-path=/test-mvc

Config

@Configuration
@EnableWebMvc
public class ApplicationConfigurerAdapter extends WebMvcConfigurerAdapter{

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

    @Bean
    public InternalResourceViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/pages/");
        resolver.setSuffix(".jsp");

        return resolver;
    }
}

应用程序

@SpringBootApplication
public class Application extends SpringBootServletInitializer {
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

控制器

@Controller
@RequestMapping("/view")
public class TestController {

    @RequestMapping("/greeting")
    public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, ModelMap model) {
        model.addAttribute("name", name);

        return "greeting";
    }
}

greeting.jsp

<html>
 <head><title>Hello world Example</title></head>
 <body>
     <h1>Hello ${name}, How are you?</h1>
 </body>
</html> 

来自http://localhost:8080/test-mvc/view/greeting?name=Mikey的输出

你好${name}，你好吗？

我还尝试返回一个ModelAndView。我不知道为什么它不把"Mikey“放在${name}的位置。

更新

每当我向JSP页面添加taglib或任何内容时，它都会显示页面源。它不会渲染页面。下面是我的pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.3.RELEASE</version>
</parent>

<properties>
    <hibernate.version>5.0.5.Final</hibernate.version>
    <postgres.version>9.4.1208</postgres.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j</artifactId>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
    </dependency>

    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
    </dependency>

    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.taglibs</groupId>
        <artifactId>taglibs-standard-impl</artifactId>
        <version>1.2.5</version>
    </dependency>
</dependencies>

Answer 1

在pom.xml中添加下面的依赖项

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>

为了避免javax.servlet.ServletException: java.lang.NoSuchMethodError: org.apache.el.lang.ELSupport.coerceToType，您可能必须在下面添加依赖项。如果您不将其添加为scope=required，那么tomcat-embed el-8.0.32.jar将被放置在您的Tomcat 8.0\webapps\AppName\WEB-INF\lib文件夹中，并将导致上述错误。如果您通过IDE或mvn Spring-boot:run命令运行应用程序，则不需要在下面添加依赖项。

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-el</artifactId>
        <scope>provided</scope>
    </dependency> 

然后访问- http://localhost:8080/AppName/view/greeting?name=Mikey

检查这个回购的完整源代码。

更新：问题由于“Tomcat -embed el”依赖关系，JSP示例的tomcat war部署无法工作。已在弹簧启动- 1.4.0.M2中修复