通过网上教程使用springboot整合fastJson后遇到页面重定向问题(使用的springboot版本是2.0.2.RELEASE ，其他的版本可能不会出现以下问题)，如下图：

我的项目结构如下

自定义的fastJson消息转换器配置类(WebMvcConfigurerAdapter这个类好像在springboot2.0以及spring5.0的版本后被废弃了所以通过继承WebMvcConfigurationSupport来实现configureMessageConverters方法的重写)，代码如下：

package com.boot.interceptor;

import java.util.ArrayList;
import java.util.List;

import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@Configuration
public class FastJsonConfiguration extends WebMvcConfigurationSupport{
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);
        // 创建FastJson消息转换器
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        // 创建配置类
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        // 修改配置返回内容的过滤
        fastJsonConfig.setSerializerFeatures(
            SerializerFeature.PrettyFormat
        );
        
        List<MediaType> fastMediaType = new ArrayList<>();
        fastMediaType.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaType);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
        // 将FastJson添加到视图消息转换器列表内
        converters.add(fastJsonHttpMessageConverter);
    }
    
}

在mvc.properties中配置了spring.mvc.view.prefix和spring.mvc.view.suffix，配置如下

 controller包中TestController测试类代码如下

package com.boot.interceptor.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController {
    
    @RequestMapping("/test")
    public String test() throws {
        return "index";
    }
    
}

index.jsp页面

将FastJsonConfiguration这个类注释掉后就可以正常返回，效果如下：

解决方案：

添加配置类生成UrlBasedViewResolver配置的Bean(@ConfigurationProperties注解的location属性好像在springboot1.5后已经没有了，所以通过@PropertySource可引入自定义配置文件)，代码如下：

package com.boot.interceptor;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.UrlBasedViewResolver;

@Configuration
@ConfigurationProperties(prefix="spring.mvc.view")
@PropertySource("classpath:mvc.properties")
public class DefaultConfiguration {
    
    private String prefix;
    private String suffix;
    
    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    public String getSuffix() {
        return suffix;
    }

    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }

    @Bean
    public UrlBasedViewResolver setupViewResolver() {
        UrlBasedViewResolver resolver = new UrlBasedViewResolver();
        resolver.setPrefix(prefix);
        resolver.setSuffix(suffix);
        resolver.setCache(true);
        resolver.setViewClass(JstlView.class);
        return resolver;
    }
}

问题是解决了，但是具体的原理问题我还没弄清楚，也希望园内的大佬指点下！