读 Spring Boot实战笔记--day004

接上一节：读 Spring Boot实战笔记–day003
其他配置

viewController 配置：

package com.example.springboot.mvc;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;/*** @Author: hyh* @Date: 2021/11/15 16:27**/
@Controller
public class ControllerH {// 通过ModelAttribute 注解获取参数 msg@GetMapping("index")public void index(@ModelAttribute("msg") String msg){}// 跳转主页面 可以配置在是视图配置里@RequestMapping("/index")public String toIndex(){return "index";}
}package com.example.springboot.mvc;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;/*** @Author: hyh* @Date: 2021/11/15 15:12**/
@Configuration
@EnableWebMvc // 开启 webmvc
public class MyMvcConfig implements WebMvcConfigurer {@Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {//addResourceLocations 指的是文件放置的目录，addResourceHandler指的是对外暴露的访问路径。registry.addResourceHandler("/assets/**").addResourceLocations("class:/assets/");}@Beanpublic MyInterceptor interceptor(){return new MyInterceptor();}@Beanpublic InternalResourceViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("WEB-INF/class/views/");resolver.setSuffix(".jsp");resolver.setViewClass(JstlView.class);return resolver;}//  拦截所有请求@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(interceptor());}// 直接配置在视图配置里@Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController("index").setViewName("index");}
}

路径匹配参数配置：
在 Spring MVC 中，路径参数如果带“.”的话，“.”后面的值将被忽略，例如，访问http://localhost:8080/highlight _springmvc4/anno/pathvar/xx.yy，此时“.”后面的yy被忽略，如图4-10所示。

通过重写configurePathMatch方法可不忽略“.”后面的参数，代码如下:

package com.example.springboot.mvc;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;/*** @Author: hyh* @Date: 2021/11/15 15:12**/
@Configuration
@EnableWebMvc // 开启 webmvc
public class MyMvcConfig implements WebMvcConfigurer {@Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {//addResourceLocations 指的是文件放置的目录，addResourceHandler指的是对外暴露的访问路径。registry.addResourceHandler("/assets/**").addResourceLocations("class:/assets/");}@Beanpublic MyInterceptor interceptor(){return new MyInterceptor();}@Beanpublic InternalResourceViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("WEB-INF/class/views/");resolver.setSuffix(".jsp");resolver.setViewClass(JstlView.class);return resolver;}//  拦截所有请求@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(interceptor());}// 直接配置在视图配置里@Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController("index").setViewName("index");}// 重写方法 不过滤 .@Overridepublic void configurePathMatch(PathMatchConfigurer configurer) {configurer.setUseSuffixPatternMatch(false);}
}

文件上传配置：
文件上传是一个项目里经常要用的功能，Spring MVC通过配置一个MultipartResolver来上传文件。在 Spring 的控制器中，通过 MultipartFile file来接收文件，通过MultipartFile[]files接收多个文件上传。

(1）添加文件上传依赖。<!-- file upload --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><!--非必需,可简化1/O操作--><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.3</version></dependency>
</dependencies>

// 前台代码  post 请求  upload 路径
<div class-"upload"><form action="upload" enctype="multipart/form-data" method="post"><input type-"file" name="file"/><br/><input type=" submit" value="上传"></form>
</div>

package com.example.springboot.mvc;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;/*** @Author: hyh* @Date: 2021/11/15 16:27**/
@Controller
public class ControllerH {@PostMapping("/upload")@ResponseBodypublic String upload(MultipartFile file){// 编写上传逻辑return "ok";}
}
package com.example.springboot.mvc;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;/*** @Author: hyh* @Date: 2021/11/15 15:12**/
@Configuration
@EnableWebMvc // 开启 webmvc
public class MyMvcConfig implements WebMvcConfigurer {@Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {//addResourceLocations 指的是文件放置的目录，addResourceHandler指的是对外暴露的访问路径。registry.addResourceHandler("/assets/**").addResourceLocations("class:/assets/");}@Beanpublic MyInterceptor interceptor(){return new MyInterceptor();}@Beanpublic InternalResourceViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("WEB-INF/class/views/");resolver.setSuffix(".jsp");resolver.setViewClass(JstlView.class);return resolver;}//  拦截所有请求@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(interceptor());}// 直接配置在视图配置里@Overridepublic void addViewControllers(ViewControllerRegistry registry) {registry.addViewController("index").setViewName("index");// 调用 toUpload 会转到 upload 方法registry.addViewController("toUpload").setViewName("upload");}// 重写方法@Overridepublic void configurePathMatch(PathMatchConfigurer configurer) {configurer.setUseSuffixPatternMatch(false);}// 配置 bean 对象@Beanpublic MultipartResolver multipartResolver(){CommonsMultipartResolver resolver = new CommonsMultipartResolver();// 文件最大为 10Mresolver.setMaxUploadSize(10 * 1024 * 1024);return resolver;}
}

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