SpringBoot支持AJAX跨域请求

文章目录
  1. 1. - 第一种方式
    1. 1.1. - CorsConfig.java
    2. 1.2. - HelloController.java
  2. 2. - 第二种方式(推荐)
  3. 3. - index.html

利用注解的方式解决AJAX请求跨域问题

1.编写一个支持跨域请求的 Configuration

- 第一种方式

- CorsConfig.java

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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;

/**
* 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

- HelloController.java

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@RestController
public class HelloController {

@Autowired
HelloService helloService;

@GetMapping(value = "/test", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public String query() {
return "hello";
}
}

- 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

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@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);
}
}

- index.html

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<!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>