SpringBoot解决ajax跨域问题的方法
发布时间:2020-12-14 19:58:32 所属栏目:Java 来源:网络整理
导读:SpringBoot解决ajax跨域,供大家参考,具体内容如下 一、第一种方式 1、编写一个支持跨域请求的 Configuration import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.CorsRegistry;impor
SpringBoot解决ajax跨域,供大家参考,具体内容如下 一、第一种方式 1、编写一个支持跨域请求的 Configuration import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.CorsRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; /** * 处理AJAX请求跨域的问题 * @author Levin * @time 2017-07-13 */ @Configuration public 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请求接口 @RestController public class HelloController { @Autowired HelloService helloService; @GetMapping(value = "/test",produces = MediaType.APPLICATION_JSON_UTF8_VALUE) public String query() { return "hello"; } } 二、 第二种方式(推荐) PS:第一种存在一个问题,当服务器抛出 500 的时候依旧存在跨域问题 @SpringBootApplication @ComponentScan @EnableDiscoveryClient public 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; } /** * 跨域过滤器 * * @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>跨域请求</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){ $("#p1").html(result); }}); }); }); </script> </head> <body> <p width="500px" height="100px" id="p1"></p> <button>获取其他内容</button> </body> </html> 三、第三种方式,编写Filter过滤器 package com.cci.market.common.filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Component; /** * 处理跨域问题 * @author MR.ZHENG * @date 2016/08/08 * */ @Component public class OriginFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest req,ServletResponse res,FilterChain chain) throws IOException,ServletException { HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Access-Control-Allow-Origin","*"); response.setHeader("Access-Control-Allow-Methods","POST,GET,OPTIONS,DELETE,PUT"); response.setHeader("Access-Control-Max-Age","3600"); response.setHeader("Access-Control-Allow-Headers","x-requested-with"); chain.doFilter(req,res); } @Override public void destroy() { // TODO Auto-generated method stub } } 四、Nginx跨域配置 Nginx跨域也比较简单,只需添加以下配置即可。 location / { proxy_pass http://localhost:8080; if ($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 ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET,Token'; add_header 'Access-Control-Expose-Headers' 'DNT,Token'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET,Token'; } } 其中:add_header 'Access-Control-Expose-Headers' 务必加上你请求时所带的header。例如本例中的“Token”,其实是前端传给后端过来的。如果记不得也没有关系,浏览器的调试器会有详细说明。 以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程小技巧。 您可能感兴趣的文章:
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