SpringBoot解決ajax跨域，供大家參考，具體內(nèi)容如下
一、第一種方式
1、編寫(xiě)一個(gè)支持跨域請(qǐng)求的 Configuration
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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(qǐng)求跨域的問(wèn)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(qǐng)求接口
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@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(gè)問(wèn)題，當(dāng)服務(wù)器拋出 500 的時(shí)候依舊存在跨域問(wèn)題
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@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(guò)濾器 * * @return */ @Bean public CorsFilter corsFilter() { UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration("/**", buildConfig()); // 4 return new CorsFilter(source); }} |
2、index.html
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<!DOCTYPE html><html><head><meta charset="utf-8"><title>跨域請(qǐng)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){ $("#p1").html(result); }}); });});</script></head><body><p width="500px" height="100px" id="p1"></p><button>獲取其他內(nèi)容</button></body></html> |
三、第三種方式，編寫(xiě)Filter過(guò)濾器
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package com.cci.market.common.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Component;/** * 處理跨域問(wèn)題 * @author MR.ZHENG * @date 2016/08/08 * */@Componentpublic class OriginFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin", "*"); response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE,PUT"); response.setHeader("Access-Control-Max-Age", "3600"); response.setHeader("Access-Control-Allow-Headers", "x-requested-with"); chain.doFilter(req, res); } @Override public void destroy() { // TODO Auto-generated method stub }} |
四、Nginx跨域配置
Nginx跨域也比較簡(jiǎn)單，只需添加以下配置即可。
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location / { proxy_pass http://localhost:8080; if ($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(wù)必加上你請(qǐng)求時(shí)所帶的header。例如本例中的“Token”，其實(shí)是前端傳給后端過(guò)來(lái)的。如果記不得也沒(méi)有關(guān)系，瀏覽器的調(diào)試器會(huì)有詳細(xì)說(shuō)明。
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://www.cnblogs.com/smiler/p/8509062.html
