ElementUI项目请求SpringBoot后台项目时提示：Access to XMLHttpRequest at **from origin ** has been blocked by CORS policy

然后打开webpack.config.js进行url的代理配置

devServer: {
    host: ‘127.0.0.1‘,
    port: 8010,
    proxy: {
      ‘/api/‘: {
        target: ‘http://127.0.0.1:8088‘,
        changeOrigin: true,
        pathRewrite: {
          ‘^/api‘: ‘‘
        }
      }
    },

以上配置代表项目的启动端口为8010，ElementUI在向后台请求Url时，就会将/api/的请求想target中执行的地址去请求

所以我们可以在页面App.vue中这样去调用后台数据接口

//页面初始化的时候，去调用
        created: function(){
            debugger
            this.getData()
        },
        methods: {
            //通过ajax去请求服务端，获取数据
            getData() {
                debugger
                let url = "/api/user/selectAllLimit?offset=2&limit=1" ;
                this.$axios.get(url).then((res) => {

                    this.tableData = res.data;//把传回来数据赋给packData

                }).catch(function(error){

                    console.log(error);

                })
            }

请求效果

ElementUI项目请求SpringBoot后台项目时提示：Access to XMLHttpRequest at **from origin ** has been blocked by CORS policy

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