springboot整合fastJson遇到重定向问题

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!

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转载自www.cnblogs.com/dyc940210/p/9178052.html