Spring MVC Java配置 [英] Spring MVC Java config
问题描述
我想从spring webapp设置一个简单的响应主体.我的问题很简单，就是出现网络错误.
I want to set a simple response body from a spring webapp. My problem is simple is given a web error.
我的POM.xml是:
My POM.xml is:
<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>pt.dummy</groupId>
<artifactId>dummy</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>dummy Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring-framework.version>3.2.3.RELEASE</spring-framework.version>
<tomcat.servlet.version>7.0.42</tomcat.servlet.version>
<log4j.version>1.7.5</log4j.version>
<java.version>1.7</java.version>
<junit.version>4.11</junit.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>${tomcat.servlet.version}</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-logging-juli</artifactId>
<version>${tomcat.servlet.version}</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>${tomcat.servlet.version}</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jdt.core.compiler</groupId>
<artifactId>ecj</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring-framework.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-framework.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>dummy</finalName>
<testResources>
<testResource>
<!-- declared explicitly so Spring config files can be placed next to their corresponding JUnit test class
(see example with ValidatorTests) -->
<directory>${project.basedir}/src/test/java</directory>
</testResource>
<testResource>
<directory>${project.basedir}/src/test/resources</directory>
</testResource>
</testResources>
<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>
</plugins>
</build>
</project>
我的网络初始化程序是:
My web initializer is:
package dummy.web.config;
import javax.servlet.Filter;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class WebAppInitializer extends
AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[] { CoreConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[] { WebConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
@Override
protected Filter[] getServletFilters() {
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
return new Filter[] { characterEncodingFilter};
}
}
核心配置:
package dummy.web.config;
import org.springframework.context.annotation.Configuration;
@Configuration
public class CoreConfig {
}
Web配置:
package dummy.web.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"dummy.web.controller"})
public class WebConfig {
}
站点控制器:
package dummy.web.controller;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/")
public class SiteController {
// private static final Logger LOG = LoggerFactory.getLogger(SiteController.class);
@RequestMapping(method = RequestMethod.GET)
@ResponseBody
public String getHome() {
// LOG.debug("Home to ResponseBody");
return "Response Body";
}
}
任何人都可以指出进行这项工作所需的更改吗?
Could anyone indicate the changes necessary to add to make this work?
推荐答案
我认为这是因为Tomcat.网络上的大多数教程都将spring mvc servlet直接放在应用程序上下文中.它对我没用.
I believe it is because of Tomcat. Most tutorials on the web put the spring mvc servlet directly in the application context. It never worked for me.
在Tomcat7(甚至具有XML配置)上，您必须创建两个上下文:一个用于整个应用程序，一个用于spring web mvc.与
On Tomcat7 (even with XML configuration) you have to create two contexts: one for the overall app and one for spring web mvc. It has something to do with
@RequestMapping("/")
服务器将"/"映射分配给默认的内置servlet.您要他(或他或她)要做的事情.但是您还需要Spring MVC来映射"/".
The server assigns "/" mapping to the default built-in servlet. Which is something you want him (or it or her) to do. But you also need Spring MVC to map "/".
也许他们(架构师)认为springmvc是特定的servlet，并且不应该映射根contex.相反，它应该在自己的映射下(例如"/springmvc/").然后，它期望我们有一个真正的调度程序，可以在springmvc和其他任何servlet之间进行调度.
Maybe they (the architects) thought springmvc is a specific servlet and shouldn't map the root contex. Instead, it should be under his own mapping (eg "/springmvc/"). And then it expects we have a real dispatcher which...dispatches between springmvc and whatever other servlets.
出于某种神奇的原因，在Tomcat 7.0.29中，如果您试图劫持"/"，则甚至无法派遣".在最新版本中，可以使用映射"/".但是为此，您需要一个单独的Web MVC上下文/根上下文.
For some magical reason, in Tomcat 7.0.29 it wasn't even able to "dispatch" if you tried to hijack "/". On the recent version, mapping "/" works .But for this you need a separate web mvc context/root context.
我不使用AbstractAnnotationConfigDispatcherServletInitializer，您必须翻译下面的代码.这是根据本教程从XML迁移到Javaconfig改编而成的.
I do not use AbstractAnnotationConfigDispatcherServletInitializer you have to translate the code below. This was adapted from this tutorial on migrating from XML to Javaconfig spring-app-migration-from-xml-to-java-based-config
public class WebInit implements WebApplicationInitializer {
private static final String DISPATCHER_SERVLET_NAME = "spring-mvc";
private static final String DISPATCHER_SERVLET_MAPPING = "/";
@Override
public void onStartup(ServletContext servletContext)
throws ServletException {
//If you want to use the XML configuration, comment the following two lines out.
AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
appContext.register(CoreConfig.class);
appContext.setDisplayName("removed customer name");
//If you want to use the XML configuration, uncomment the following lines.
//XmlWebApplicationContext rootContext = new XmlWebApplicationContext();
//rootContext.setConfigLocation("classpath:mvc-servlet.xml");
AnnotationConfigWebApplicationContext mvcContext = new AnnotationConfigWebApplicationContext();
mvcContext.register(ServletConfig.class);
ServletRegistration.Dynamic springmvc =
servletContext.addServlet(DISPATCHER_SERVLET_NAME,
new DispatcherServlet(mvcContext));
springmvc.setLoadOnStartup(1);
springmvc.addMapping(DISPATCHER_SERVLET_MAPPING);
EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD);
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
characterEncodingFilter.setForceEncoding(true);
FilterRegistration.Dynamic characterEncoding = servletContext.addFilter("characterEncoding", characterEncodingFilter);
characterEncoding.addMappingForUrlPatterns(dispatcherTypes, true, "/*");
FilterRegistration.Dynamic security = servletContext.addFilter("springSecurityFilterChain", new DelegatingFilterProxy());
security.addMappingForUrlPatterns(dispatcherTypes, true, "/*");
servletContext.addListener(new ContextLoaderListener(appContext));
}
这篇关于Spring MVC Java配置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
