3.Springboot配置跨域

一.过滤器进行全局配置统一跨域配置方法

使用过滤器和拦截器方法来统一配置跨域请求性能是差不多，方便的地方是在这一个方法统一配置之后，就可以方便的使用后台方法了，但是也有个缺点，如果你不是设置为私有的方法，在controller里能够看到的代码在服务器外部都可以被访问到。

package com.tms.tblog.infrastructure.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

/***
 * 配置跨域
 */
@Configuration
public class CorsConfig {
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        // 1允许任何域名使用
        corsConfiguration.addAllowedOrigin("*");
        // 2允许任何头
        corsConfiguration.addAllowedHeader("*");
        // 3允许任何方法（post、get等）
        corsConfiguration.addAllowedMethod("*");
        return corsConfiguration;
    }
}

二.使用注解@CrossOrigin 可以实现单个Controller类跨域访问或者单个方法跨域

package com.ten.ms.tmsframework.sys.controller;


import java.io.File;
import java.io.FileOutputStream;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * 测试跨域
 */
@CrossOrigin
@RestController
@RequestMapping("/test/test")
public class TestController {

    @Resource
    private testService testService;


    @RequestMapping(value = "/gettestList", method = {RequestMethod.GET, RequestMethod.POST})
    @ResponseBody
    public boolean gettestList(@RequestBody testPageInvo testPageInvo) {
        return true;
    }
}

三.拦截器进行全局配置统一跨域配置方法三.拦截器进行全局配置统一跨域配置方法

使用拦截器来配置跨域，好像WebMvcConfigurerAdapter这个类有些方法已经过时了，这个还是尽量别用了，用不好再出问题了。

@Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter  {
    @Value("${file.staticAccessPath}")
    private String staticAccessPath;
    @Value("${file.uploadFolder}")
    private String uploadFolder;

    @Bean
    public CorsFilter corsFilter() {
        final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
        final CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.setAllowCredentials(true);
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsFilter(urlBasedCorsConfigurationSource);
    }

    @Override  
    public void addCorsMappings(CorsRegistry registry) {  
        registry.addMapping("/**")  
                .allowCredentials(true)  
                .allowedHeaders("*")  
                .allowedOrigins("*")  
                .allowedMethods("*");

    }


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/upload/**").addResourceLocations("file:" + "upload");
        super.addResourceHandlers(registry);
    }

    /**
     * 用于处理编码问题
     *
     * @return
     */
    @Bean
    public Filter characterEncodingFilter() {
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("UTF-8");
        characterEncodingFilter.setForceEncoding(true);
        return characterEncodingFilter;
    }
}