前后端传参中遇见的问题

前后端传参经常容易出错，本文记录开发springBoot+Mybatis-plus+vuecli项目中出现的传参问题及解决办法
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1.前后端没有跨域配置，报错

解决方法：后端进行跨域配置，拷贝CorsConfig类

package com.example.xxxx.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

/**
 * 全局配置可跨域访问api接口
 */

@Configuration
public class CorsConfig {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); //允许任何域名
        corsConfiguration.addAllowedHeader("*"); //允许任何头
        corsConfiguration.addAllowedMethod("*"); //允许任何方法
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); //注册
        return new CorsFilter(source);
    }
}