SpringBoot解決ajax跨域，供大家參考，具體內容如下
一、第一種方式
1、編寫一個支持跨域請求的Configuration
import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.CorsRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * 處理AJAX請求跨域的問題* @author Levin * @time 2017-07-13 */@Configurationpublic class CorsConfig extends WebMvcConfigurerAdapter { static final String ORIGINS[] = new String[] { "GET", "POST", "PUT", "DELETE" }; @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/**").allowedOrigins("*").allowCredentials(true).allowedMethods(ORIGINS) .maxAge(3600); }}2、HTTP請求接口
@RestControllerpublic class HelloController { @Autowired HelloService helloService; @GetMapping(value = "/test", produces = MediaType.APPLICATION_JSON_UTF8_VALUE) public String query() { return "hello"; }}二、 第二種方式（推薦）
PS：第一種存在一個問題，當服務器拋出500 的時候依舊存在跨域問題
@SpringBootApplication@ComponentScan@EnableDiscoveryClientpublic class ManagementApplication { public static void main(String[] args) { SpringApplication.run(ManagementApplication.class, args); } private CorsConfiguration buildConfig() { CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.addAllowedOrigin("*"); corsConfiguration.addAllowedHeader("*"); corsConfiguration.addAllowedMethod("*"); corsConfiguration.addExposedHeader(HttpHeaderConStant.X_TOTAL_COUNT); return corsConfiguration; } /** * 跨域過濾器* * @return */ @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration("/**", buildConfig()); // 4 return new CorsFilter(source); }}2、index.html
<!DOCTYPE html><html><head><meta charset="utf-8"><title>跨域請求</title><script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $.ajax({url:"http://localhost:8080/test",success:function(result){ $("#p1").html(result); }}); });});</script></head><body><p id="p1"></p><button>獲取其他內容</button></body></html>三、第三種方式，編寫Filter過濾器
package com.cci.market.common.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Component;/** * 處理跨域問題* @author MR.ZHENG * @date 2016/08/08 * */@Componentpublic class OriginFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin", "*"); response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE,PUT"); response.setHeader("Access-Control-Max-Age", "3600"); response.setHeader("Access-Control-Allow-Headers", "x-requested-with"); chain.doFilter(req, res); } @Override public void destroy() { // TODO Auto-generated method stub }}四、Nginx跨域配置
Nginx跨域也比較簡單，只需添加以下配置即可。
location / { proxy_pass http://localhost:8080; if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token'; add_header 'Access-Control-Max-Age' 1728000; add_header 'Content-Type' 'text/plain; charset=utf-8'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token'; add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token'; add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Token'; }}其中：add_header 'Access-Control-Expose-Headers' 務必加上你請求時所帶的header。例如本例中的“Token”，其實是前端傳給後端過來的。如果記不得也沒有關係，瀏覽器的調試器會有詳細說明。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。