SpringBoot支援AJAX跨域請求

最後更新：2018-04-25 來源：互聯網

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利用註解的方式解決AJAX請求跨域問題

1.編寫一個支援跨域請求的 Configuration

- 第一種方式- CorsConfig.java

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請求介面

- HelloController.java

@RestControllerpublic class HelloController {        @Autowired    HelloService helloService;        @GetMapping(value = "/test", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)    public String query() {        return "hello";    }}

- 第二種方式（推薦）

PS：第一種存在一個問題，當伺服器拋出 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);    }}

- 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 width="500px" height="100px" id="p1"></p><button>擷取其他內容</button></body></html>

SpringBoot支援AJAX跨域請求

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