SpringBoot 静态资源使用项目外部路径图片跨域问题CORS 解决

矫情吗；* 2021-09-19 14:32 841阅读 0赞

# 配置类 #

package com.zz.config;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    
    @Configuration
    public class WebAppConfig extends WebMvcConfigurerAdapter {
    
        @Value("${imagesPath}")
        private String mImagesPath;
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
            if(mImagesPath.equals("") || mImagesPath.equals("${imagesPath}")){
                String imagesPath = WebAppConfig.class.getClassLoader().getResource("").getPath();
                if(imagesPath.indexOf(".jar")>0){
                    imagesPath = imagesPath.substring(0, imagesPath.indexOf(".jar"));
                }else if(imagesPath.indexOf("classes")>0){
                    imagesPath = "file:"+imagesPath.substring(0, imagesPath.indexOf("classes"));
                }
                imagesPath = imagesPath.substring(0, imagesPath.lastIndexOf("/"))+"/images/";
                mImagesPath = imagesPath;
            }
            //LoggerFactory.getLogger(WebAppConfig.class).info("imagesPath="+mImagesPath);
            registry.addResourceHandler("/images/**").addResourceLocations(mImagesPath);
            // TODO Auto-generated method stub
            super.addResourceHandlers(registry);
        }
    }

# 配置文件设置外面路径地址 #

application.properties

## 图片上传真是地址
    imagesPath=file:/C:/upload/

# 测试 访问图片路径： http://localhost:9001/core/images/2.jpg #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70]

## 图片实际存放路径：C:\\upload ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 1]

# SpringBoot2.X #

Springboot2 里面WebMvcConfigurerAdapter 已经过时。

推荐使用接口 WebMvcConfigurer 。

package com.cy.config;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    
    @Configuration
    public class WebAppConfig implements WebMvcConfigurer {
    
        @Value("${imagesPath}")
        private String mImagesPath;
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
            if(mImagesPath.equals("") || mImagesPath.equals("${imagesPath}")){
                String imagesPath = WebAppConfig.class.getClassLoader().getResource("").getPath();
                if(imagesPath.indexOf(".jar")>0){
                    imagesPath = imagesPath.substring(0, imagesPath.indexOf(".jar"));
                }else if(imagesPath.indexOf("classes")>0){
                    imagesPath = "file:"+imagesPath.substring(0, imagesPath.indexOf("classes"));
                }
                imagesPath = imagesPath.substring(0, imagesPath.lastIndexOf("/"))+"/images/";
                mImagesPath = imagesPath;
            }
            //LoggerFactory.getLogger(WebAppConfig.class).info("imagesPath="+mImagesPath);
            registry.addResourceHandler("/images/**").addResourceLocations(mImagesPath);
            // TODO Auto-generated method stub
        }
    }

# 跨域问题CORS 统一处理 #

package com.zz.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.CorsRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    
    /**
     * @Description: java类作用描述
     * @Author: Bsea
     * @CreateDate: 2019/10/9$ 21:33$
     */
    @Configuration
    public class CorsConfig {
        @Bean
        public WebMvcConfigurer corsConfigurer() {
            return new WebMvcConfigurer() {
                @Override
                public void addCorsMappings(CorsRegistry registry) {
                    registry.addMapping("/**")
                            .allowedOrigins("*");//允许域名访问，如果*，代表所有域名
                }
            };
        }
    }

## 关注公众号，可以获取学习资料和源码 ##

![在这里插入图片描述][20200624163937211.jpg]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70]: /images/20210726/87c42f8e587044a48126d7a88ef8ae95.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2gzNTYzNjM_size_16_color_FFFFFF_t_70 1]: /images/20210726/ef436f01c95247c5950f9189f5241fba.png
[20200624163937211.jpg]: /images/20210726/ee09f60ff0914a68b534986ed55b8972.png