SpringBoot解决ajax跨域问题的方法
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2022-06-21 16:07:10
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....
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 ($request_method = 'post') {
add_header 'access-control-allow-origin' '*';
add_header 'access-control-allow-methods' 'get, post, options';
add_header 'access-control-allow-headers' 'dnt,x-customheader,keep-alive,user-agent,x-requested-with,if-modified-since,cache-control,content-type,content-range,range,token';
add_header 'access-control-expose-headers' 'dnt,x-customheader,keep-alive,user-agent,x-requested-with,if-modified-since,cache-control,content-type,content-range,range,token';
}
if ($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' 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。
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