2019独角兽企业重金招聘Python工程师标准>>> 
首先在idea创建一个jar工程，不需要去创建任何配置文件，也包括web.xml
首先写spring的配置类（）
package com.liy.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
/**
*spring配置文件类
*
*configuration 此注解标明配置类的身份
*下面的步骤相当于xml配置文件中的开启spring扫描，开启默认注解，不过排除掉controller注解
*/
@Configuration
@ComponentScan(basePackages = "com.liy",useDefaultFilters = true,
excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,
classes = Controller.class)})
public class SpringConfig {
}
然后是springmvc的配置类
package com.liy.config;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.omg.CosNaming.NamingContextExtPackage.AddressHelper;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import java.nio.charset.Charset;
import java.util.List;
/**
*springmvc 配置文件类
*/
@Configuration
@ComponentScan(basePackages = "com.liy",
useDefaultFilters = false,
includeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,
classes = Controller.class),
@ComponentScan.Filter(type = FilterType.ANNOTATION,
classes = Configuration.class)})
public class SpringMVCConfig extends WebMvcConfigurationSupport {
//把根目录下的静态资源放开，不过访问静态资源时，请求路径前要加上“/js/”
@Override
protected void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/js/**").addResourceLocations("classpath:/");
}
//给访问jsp的请求加上前缀（“/”） 和后缀 (".jsp")
@Override
protected void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp("/",".jsp");
}
//这里表示，访问/hello3路径后，进入名为hello的视图去
@Override
protected void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/hello3").setViewName("hello");
}
//加了fastjson的依赖后，这里配置引用fastjson，以及设置编码
@Override
protected void configureMessageConverters(List> converters) {
FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
converter.setDefaultCharset(Charset.forName("UTF-8"));
FastJsonConfig config = new FastJsonConfig();
config.setCharset(Charset.forName("UTF-8"));
converter.setFastJsonConfig(config);
converters.add(converter);
}
}
再写个初始化的类，相当于web.xml，启动项目就加载配置文件
package com.liy.config;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
/**
* 相当于web.xml
*
*/
public class WebInit implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//扫描springmvc
AnnotationConfigWebApplicationContext afw =
new AnnotationConfigWebApplicationContext();
afw.register(SpringMVCConfig.class);
//添加dispatchservlet
ServletRegistration.Dynamic springmvc = servletContext.addServlet("springmvc", new DispatcherServlet(afw));
//添加映射文件路径
springmvc.addMapping("/");
//给springmvc添加启动时机
springmvc.setLoadOnStartup(1);
}
}
注意这个相当于web.xml的类这能扫描springmvc的配置类，所以要把spring的配置类的注解类型加到springmvc的扫描中
@ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Configuration.class)
这样spring和springmvc的纯java注解方式就整合完成了
其实spring的配置类可以省略 ，只要springmvc的配置类扫描所有地方就行
@Configuration
@ComponentScan(basePackages = "com.liy")
public class SpringMVCConfig extends WebMvcConfigurationSupport {
这样spring的配置类就不需要了
然后写个controller类测试下
@Controller
public class HelloController {
@Autowired
HelloService hs;
@GetMapping(value = "/hello",produces = "text/html;charset=utf-8")
@ResponseBody
public String Hello(String name) {
return hs.hello(name);
}
页面能看到数据就表示成功了