SpringBoot集成fastjson

项目结构

pom.xml 中导入依赖

        <!-- fastjson -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.47</version>
		</dependency>

实现WebMvcConfigurer并重写configureMessageConverters方法

ApplicationConfigurerAdapter.java

package com.example.demo.config.web;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

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

/**
 * Created by Administrator on 2018/7/30.
 */
@Configuration
@EnableWebMvc
@ComponentScan("com.example.demo.config.web")
public class ApplicationConfigurerAdapter implements WebMvcConfigurer {

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
    /**
     * 配置静态资源的处理
     */
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        //定义一个convert 转换消息的对象
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        //fastJson的配置信息
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        //是否需要格式化返回的json数据
        // 空值特别处理
        // WriteNullListAsEmpty 将Collection类型字段的字段空值输出为[]
        // WriteNullStringAsEmpty 将字符串类型字段的空值输出为空字符串 ""
        // WriteNullNumberAsZero 将数值类型字段的空值输出为0
        // WriteNullBooleanAsFalse 将Boolean类型字段的空值输出为false
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        // 处理中文乱码问题
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
        converters.add(fastJsonHttpMessageConverter);
    }
}

DemoWebAppInitializer.java

package com.example.demo.config.web;

import com.example.demo.config.RootConfig;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * Created by Administrator on 2018/7/30.
 */
public class DemoWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{RootConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[]{ApplicationConfigurerAdapter.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

RootConfig.java

package com.example.demo.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

/**
 * Created by Administrator on 2018/7/30.
 */
@Configuration
@ComponentScan(basePackages = "com.example.demo", excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)})
public class RootConfig {
}

HelloController.java

package com.example.demo.controller;

import com.example.demo.config.test.ConfigTest;
import com.example.demo.pojo.TestPojo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.Date;

/**
 * Created by Administrator on 2018/7/30.
 */
@Controller
@RequestMapping("/hello")
public class HelloController {

    @Autowired
    private ConfigTest configTest;

    @Value("${helloWord}")
    private String helloWord;

    @RequestMapping("/word")
    public String helloWord() {
        System.out.println(configTest.getPrefix());
        System.out.println(configTest.getSuffix());
        return "helloWord";
    }

    @RequestMapping("/test/pojo")
    @ResponseBody
    public TestPojo getTestPojo() {
        TestPojo tp = new TestPojo();
        tp.setId(1);
        tp.setSex("男");
        tp.setTime(new Date());
        return tp;
    }
}

测试PO类TestPojo.java

package com.example.demo.pojo;

import com.alibaba.fastjson.annotation.JSONField;

import java.util.Date;

/**
 * Created by Administrator on 2018/8/1.
 */
public class TestPojo {

    private Integer id;

    private String sex;

    @JSONField(format = "yyyy-MM-dd HH:mm")
    private Date time;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Date getTime() {
        return time;
    }

    public void setTime(Date time) {
        this.time = time;
    }
}

SpringBoot启动类DemoApplication.java

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}
}

启动项目,测试地址http://localhost:8080/hello/test/pojo

配置成功