SpringBoot8-Spring MVC-Spring MVC基本配置一：静态资源映射 二：拦截器配置三：@ControllerAdvice四：其他配置

        Spring MVC的定制配置需要我们的配置类继承一个WebMvcConfigurerAdapter类，并在此类使用@EnableWebMvc注解，并开启对Spring MVC的配置支持，这样我们就可以重写这个类的方法，完成我们的常用配置。

        我们将前面的MyMvcConfig配置类继承WebMvcConfigurerAdapter。下面没有特别说明，关于配置的相关内容都在MyMvcConfig里编写。

一：静态资源映射

    程序的静态文件（js，css，图片）等需要直接访问，这时我们可以在配置里重写addResourceHandlers方法来实现。

     示例：

     1，添加静态资源

      我们在src/main/resource建立assets/js目录，并复制一个jquery的js文件放置在此目录，如下：

   配置代码如下：

package jack.springmvc.config;

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

/**
 * Created by jack on 2017/7/16.
 */
@Configuration
@EnableWebMvc   //开启Spring MVC支持，若无此句，重写WebMvcConfigurerAdapter方法无效
@ComponentScan("jack.springmvc")
//继承WebMvcConfigurerAdapter类，重写其方法可对Spring MVC进行配置
public class MyMvcConfig extends WebMvcConfigurerAdapter{
    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        //viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setSuffix(".jsp");
        viewResolver.setViewClass(JstlView.class);
        return  viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //super.addResourceHandlers(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("classpath:/assets/");
    }
}

二：拦截器配置

      拦截器（Interceptor）实现对每一个请求前后进行相关的业务处理，类似于Servlet的Filter。

      可让普通的Bean实现HanlderInterceptor接口或者继承HandlerInterceptorAdapter类来实现自定义拦截器。

      通过重写WebMvcConfigurerAdapter的addInterceptors方法来注册自定义拦截器，下面演示一个简单拦截器的开发和配置，业务含义为计算每一次的处理时间。

      示例：

编写拦截器代码：

package jack.springmvc.interceptor;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by jack on 2017/7/24.
 */
//继承HandlerInterceptorAdapter类来实现自定义拦截器
public class DemoInterceptor extends HandlerInterceptorAdapter{
    /**
     * 重写preHandle方法，在请求发生之前执行
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //return super.preHandle(request, response, handler);
        long startTime = System.currentTimeMillis();
        request.setAttribute("startTime",startTime);
        return true;
    }

    /**
     * 重写postHandle方法，在请求完成之后执行
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        //super.postHandle(request, response, handler, modelAndView);
        long startTime = (long) request.getAttribute("startTime");
        request.removeAttribute("startTime");
        long endTime = System.currentTimeMillis();
        System.out.println("本次请求处理时间为："+new Long(endTime-startTime)+"ms");
        request.setAttribute("handlingTime",endTime-startTime);
    }
}

配置拦截器，配置拦截器的Bean，重写addInterceptors，注册拦截器，代码如下：

package jack.springmvc.config;

import jack.springmvc.interceptor.DemoInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

/**
 * Created by jack on 2017/7/16.
 */
@Configuration
@EnableWebMvc   //开启Spring MVC支持，若无此句，重写WebMvcConfigurerAdapter方法无效
@ComponentScan("jack.springmvc")
//继承WebMvcConfigurerAdapter类，重写其方法可对Spring MVC进行配置
public class MyMvcConfig extends WebMvcConfigurerAdapter{

    /**
     * 配置拦截器的Bean
     * @return
     */
    @Bean
    public DemoInterceptor demoInterceptor(){
        return new DemoInterceptor();
    }

    /**
     * c重写addInterceptors方法，注册拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //super.addInterceptors(registry);
        registry.addInterceptor(demoInterceptor());
    }

    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        //viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setSuffix(".jsp");
        viewResolver.setViewClass(JstlView.class);
        return  viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //super.addResourceHandlers(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("classpath:/assets/");
    }
}

在浏览器输入：http://localhost:8080/index

输出如下：

三：@ControllerAdvice

      通过@ControllerAdvice，我们可以将对于控制器的全局配置放置在同一个位置，注解了 @ControllerAdvice的类的方法可使用@ExceptionHandler，@InitBinder，@ModelAttribute注解到方法上，这对所有注解了@RequestMapping的控制器内的方法有效。

     @ExceptionHandler：用于全局处理控制器的异常

     @InitBinder：用来设置WebDataBinder，WebDataBinder用来自动绑定前台请求参数到Model中。

     @ModelAttribute：@ModelAttribute本来的作用是绑定键值对到Model里，此处是让全局的@RequestMapping都能获得此处设置的键值对。

     下面演示使用@ExceptionHandler处理全局异常，更人性化的将异常输出给用户。

    示例：

1）定制ControllerAdvice

package jack.springmvc.advice;

import org.springframework.ui.Model;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.ModelAndView;


/**
 * Created by jack on 2017/7/24.
 */
//@ControllerAdvice声明一个控制器建言，@ControllerAdvice组合了@Component注解，所以自动注册为Spring的bean
@ControllerAdvice
public class ExceptionHandlerAdvice {
    /**
     * @ExceptionHandler在此处定义全局处理，通过@ExceptionHandler的value属性可过滤拦截的条件，
     * 再此我们可以看出我们拦截所有的Exception
     * @param exception
     * @param request
     * @return
     */
    @ExceptionHandler(value = Exception.class)
    public ModelAndView exception(Exception exception, WebRequest request){
        ModelAndView modelAndView = new ModelAndView("error");//error页面
        modelAndView.addObject("errorMessage",exception.getMessage());
        return modelAndView;
    }


    /**
     * 此处使用@ModelAttribute注解将键值对添加到全局，所有注解了@RequestMapping的方法可获得此键值对
     * @param model
     */
    @ModelAttribute
    public void addAttributes(Model model){
        model.addAttribute("msg", "额外信息");
    }

    /**
     * 通过@InitBinder注解定制WebDataBinder
     * @param webDataBinder
     */
    @InitBinder
    public void initBinder(WebDataBinder webDataBinder){
        //此处演示忽略request参数的id
        webDataBinder.setDisallowedFields("id");
    }

}

2）演示控制器

package jack.springmvc.controller;

import jack.springmvc.domain.DemoObj;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Created by jack on 2017/7/24.
 */
@Controller
public class AdviceController {
    @RequestMapping("/advice")
    public String getSomething(@ModelAttribute("msg") String msg, DemoObj obj){
        throw new IllegalArgumentException("非常抱歉，参数有误/" + "来自@ModelAttribute：" + msg);
    }
}

3）异常展示页面

    在src/main/resources/views下，新建error.jsp，内容如下：

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>
<html>
<head>
    <meta http-equiv="CONTENT-TYPE" content="text/html; charset=UTF-8" >
    <title>@ControllerAdvice Demo</title>
</head>
<body>
<pre>
    ${errorMessage}
</pre>
</body>
</html>

4）运行

 在浏览器输入：http://localhost:8080/advice?id=1&name=xx，页面显示如下所示：

   其中DemoObj的id被过滤掉了。且获得了@ModelAttribute的msg信息

四：其他配置

1，快捷的ViewController

   在前面我们配置页面转向的时候使用了下面的代码：

   @RequestMapping(value = "/index")
    public String hello(){
        //通过MyMvcConfig里面的配置，通过ViewResolver的Bean配置，返回值为index，
        // 说明我们的页面存放的路径为/classes/views/index.jsp
        return "index";
    }

  此处无任何业务处理，只是简单的页面转向，写了至少三行代码，在实际开发中会涉及大量的这样页面转向，若都这样写会很麻烦，我们可以通过在配置中重写addViewControllers来简化配置：

package jack.springmvc.config;

import jack.springmvc.interceptor.DemoInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

/**
 * Created by jack on 2017/7/16.
 */
@Configuration
@EnableWebMvc   //开启Spring MVC支持，若无此句，重写WebMvcConfigurerAdapter方法无效
@ComponentScan("jack.springmvc")
//继承WebMvcConfigurerAdapter类，重写其方法可对Spring MVC进行配置
public class MyMvcConfig extends WebMvcConfigurerAdapter{

    /**
     * 配置拦截器的Bean
     * @return
     */
    @Bean
    public DemoInterceptor demoInterceptor(){
        return new DemoInterceptor();
    }

    /**
     * c重写addInterceptors方法，注册拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //super.addInterceptors(registry);
        registry.addInterceptor(demoInterceptor());
    }

    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        //viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setSuffix(".jsp");
        viewResolver.setViewClass(JstlView.class);
        return  viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //super.addResourceHandlers(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("classpath:/assets/");
    }

    /**
     * 统一处理没啥业务逻辑处理的controller请求，实现代码的简洁
     * @param registry
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //super.addViewControllers(registry);
        registry.addViewController("/index").setViewName("/index");
    }
}

注释掉之前处理/index的controller，重启服务器，输入http://localhost:8080/index进行访问，发现和之前是一样的结果。把没有业务的controller统一进行处理，代码根据简洁，管理更加集中了。

2，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/anno/pathvar/xx.yy,此时“.”后面的yy被忽略了，如下所示：

通过重写configurePathMatch方法可忽略"."后面的参数，代码如下：

@Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        //super.configurePathMatch(configurer);
        configurer.setUseSuffixPatternMatch(false);
    }

目前spring mvc配置的完整代码如下：

package jack.springmvc.config;

import jack.springmvc.interceptor.DemoInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

/**
 * Created by jack on 2017/7/16.
 */
@Configuration
@EnableWebMvc   //开启Spring MVC支持，若无此句，重写WebMvcConfigurerAdapter方法无效
@ComponentScan("jack.springmvc")
//继承WebMvcConfigurerAdapter类，重写其方法可对Spring MVC进行配置
public class MyMvcConfig extends WebMvcConfigurerAdapter{

    /**
     * 配置拦截器的Bean
     * @return
     */
    @Bean
    public DemoInterceptor demoInterceptor(){
        return new DemoInterceptor();
    }

    /**
     * c重写addInterceptors方法，注册拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //super.addInterceptors(registry);
        registry.addInterceptor(demoInterceptor());
    }

    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        //viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setPrefix("/WEB-INF/classes/views/");
        viewResolver.setSuffix(".jsp");
        viewResolver.setViewClass(JstlView.class);
        return  viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //super.addResourceHandlers(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("classpath:/assets/");
    }

    /**
     * 统一处理没啥业务逻辑处理的controller请求，实现代码的简洁
     * @param registry
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //super.addViewControllers(registry);
        registry.addViewController("/index").setViewName("/index");
    }

    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        //super.configurePathMatch(configurer);
        configurer.setUseSuffixPatternMatch(false);
    }
}

重启tomcat，在访问http://localhost:8080/anno/pathvar/xx.yy，就可以接受"."后面的yy了，如下：

3，更多配置

    更多配置可以查看WebMvcConfigurerAdapter类的api。因其是WebMvcConfigurer接口的实现，所以WebMvcConfigurer的api内的也可以用来MVC。下面看看WebMvcConfigurerAdapter和WebMvcConfigurer的源码。

WebMvcConfigurerAdapter：

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package org.springframework.web.servlet.config.annotation;

import java.util.List;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
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.WebMvcConfigurer;

public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer {
    public WebMvcConfigurerAdapter() {
    }

    public void configurePathMatch(PathMatchConfigurer configurer) {
    }

    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
    }

    public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
    }

    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    }

    public void addFormatters(FormatterRegistry registry) {
    }

    public void addInterceptors(InterceptorRegistry registry) {
    }

    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    }

    public void addCorsMappings(CorsRegistry registry) {
    }

    public void addViewControllers(ViewControllerRegistry registry) {
    }

    public void configureViewResolvers(ViewResolverRegistry registry) {
    }

    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
    }

    public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) {
    }

    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
    }

    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
    }

    public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
    }

    public Validator getValidator() {
        return null;
    }

    public MessageCodesResolver getMessageCodesResolver() {
        return null;
    }
}

WebMvcConfigurer：

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package org.springframework.web.servlet.config.annotation;

import java.util.List;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;

public interface WebMvcConfigurer {
    void configurePathMatch(PathMatchConfigurer var1);

    void configureContentNegotiation(ContentNegotiationConfigurer var1);

    void configureAsyncSupport(AsyncSupportConfigurer var1);

    void configureDefaultServletHandling(DefaultServletHandlerConfigurer var1);

    void addFormatters(FormatterRegistry var1);

    void addInterceptors(InterceptorRegistry var1);

    void addResourceHandlers(ResourceHandlerRegistry var1);

    void addCorsMappings(CorsRegistry var1);

    void addViewControllers(ViewControllerRegistry var1);

    void configureViewResolvers(ViewResolverRegistry var1);

    void addArgumentResolvers(List<HandlerMethodArgumentResolver> var1);

    void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> var1);

    void configureMessageConverters(List<HttpMessageConverter<?>> var1);

    void extendMessageConverters(List<HttpMessageConverter<?>> var1);

    void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> var1);

    void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> var1);

    Validator getValidator();

    MessageCodesResolver getMessageCodesResolver();
}

最后

以上就是威武高跟鞋为你收集整理的SpringBoot8-Spring MVC-Spring MVC基本配置一：静态资源映射 二：拦截器配置三：@ControllerAdvice四：其他配置的全部内容，希望文章能够帮你解决SpringBoot8-Spring MVC-Spring MVC基本配置一：静态资源映射 二：拦截器配置三：@ControllerAdvice四：其他配置所遇到的程序开发问题。

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