Spring Boot拦截器与跨域问题，对象转换为JSON

Spring Boot中，拦截器与跨域同时配置后，跨域会失效。

在prehandle中加入

if("OPTIONS".equals(request.getMethod().toUpperCase())){
    return true;
}

遇到OPTIONS请求直接放行。

或者将跨域写为filter

package com.loves.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;

@Configuration
public class CorsConfig {

    @Bean
    public CorsFilter corsFilter(){
        CorsConfiguration config = new CorsConfiguration();
        config.addAllowedHeader("*");
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.setAllowCredentials(true);
        UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
        configSource.registerCorsConfiguration("/**",config);
        return new CorsFilter(configSource);
    }
}

 

将对象转换为JSON，先引入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.75</version>
</dependency>

之后再用JSON类的toJSONString（）方法将对象转换为json字符串