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!