springboot解决js前端跨域问题，javascript跨域问题解决

闻说社

发布于 2024-11-25 16:33:43

4750

一，编写Filter过滤器

把下面代码放到你的springboot项目中就可以了

 代码解读复制代码package com.qcl;

import org.springframework.stereotype.Component;

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;

/**
 * 处理跨域问题
 *  qcl：微信2501902696
 */
@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() {

    }
}

二，用js做下请求验证下

 代码解读复制代码{
    "code": 100,
    "msg": "成功",
    "data": 3
}

对应的js请求代码如下

 代码解读复制代码<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js+springboot解决跨域请求</title>
</head>
<body>
<script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
    var baseUrl = "https://30paotui.com";

    $(document).ready(function () {
        $("button").click(function () {
            $.ajax({
                url: baseUrl + "/pv/2048/list", success: function (result) {
                    document.getElementById("p1").innerHTML = result;
                    var str = JSON.stringify(result); //将JSON对象转化为JSON字符
                    var obj = JSON.parse(str); //由JSON字符串转换为JSON对象
                    console.log(str);
                    console.log(obj);
                    console.log(obj.data);
                    console.log(result.msg);
                    console.log(result.code);
                }
            });
        });
    });
</script>
<p id="p1"></p>
<button>获取其他内容</button>

</body>
</html>

请求效果如下