【Springboot】FastJson与Jackson全局序列化方式的配置和相关工具类

springboot 版本:

 <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
 </parent>

FastJson版本:

<!--fastJson库-->
<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.46</version>
</dependency>

Jackson的序列化方式：

@Configuration
@EnableWebMvc
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * 配置Jackson的序列化方式
     * @param converters
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        final MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = new ObjectMapper();
        converter.setObjectMapper(objectMapper);
        converters.add(converter);
        converters.add(new StringHttpMessageConverter(StandardCharsets.UTF_8));
    }
}

FastJson的序列化方式：

@Configuration
@EnableWebMvc
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * fastjson的全局序列化方式
     * @param converters
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        // 1、需要先定义一个·convert转换消息的对象；
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2、添加fastjson的配置信息，比如 是否要格式化返回json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        // 3、在convert中添加配置信息.
        fastConverter.setFastJsonConfig(fastJsonConfig);
        // 4、将convert添加到converters当中.
        converters.add(fastConverter);
    }
}

序列化 工具类

Jackson工具类

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.Lists;
import lombok.NoArgsConstructor;
import lombok.SneakyThrows;

import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author: Sam.yang
 * @date: 2020/9/15 11:41
 * @desc: Jackson 解析器
 */
@NoArgsConstructor
public class JacksonUtil {

    /**
     * 单个对象复制
     */
    @SneakyThrows
    public static <F, T> T copy(F from, Class<T> destCls) {
        if (from == null) {
            return null;
        }

        if (from.getClass().equals(destCls)) {
            return (T) from;
        }
        ObjectMapper mapper = new ObjectMapper().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        return mapper.readValue(mapper.writeValueAsString(from), destCls);
    }

    /**
     * 集合复制
     */
    public static <F, T> List<T> copyList(List<F> from, Class<T> destCls) {
        if (CollectionUtils.isEmpty(from)) {
            return Collections.<T>emptyList();
        }
        if (from.get(0).getClass().equals(destCls)) {
            return (List<T>) from;
        }
        return from.stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
    }

    /**
     * Page复制
     */
    public static <F, T> IPage<T> copyPage(IPage<F> from, Class<T> destCls) {
        IPage<T> to = new Page<>();
        if (null != from) {
            to.setCurrent(from.getCurrent());
            to.setPages(from.getPages());
            to.setSize(from.getSize());
            to.setTotal(from.getTotal());
            List<T> dls = Lists.newArrayList();
            if (!CollectionUtils.isEmpty(from.getRecords())) {
                dls = from.getRecords().stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
            }
            to.setRecords(dls);
        }
        return to;
    }

    /**
     * Page复制到集合 这里用的是mybatisplus分页
     */
    public static <F, T> List<T> copyPageToList(IPage<F> from, Class<T> destCls) {
        List<T> dls = Lists.newArrayList();
        if (null != from) {
            if (!CollectionUtils.isEmpty(from.getRecords())) {
                dls = from.getRecords().stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
            }
        }
        return dls;
    }
}

FastJson序列化工具类

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.ValueFilter;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.google.common.collect.Lists;

import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

public class BeanCopyUtil {
    private BeanCopyUtil() { }
    //单个对象复制
    public static <F, T> T copy(F from, Class<T> destCls) {
        if (from == null) {
            return null;
        }

        if (from.getClass().equals(destCls)) {
            return (T) from;
        }
        return JSON.parseObject(JSON.toJSONString(from), destCls);
    }
    private static ValueFilter filter = (obj, s, v) -> {
        if (v == null)
            return "";
        return v;
    };

    //集合复制
    public static <F, T> List<T> copyList(List<F> from, Class<T> destCls) {
        if (CollectionUtils.isEmpty(from)) {
            return Collections.<T>emptyList();
        }
        if (from.get(0).getClass().equals(destCls)) {
            return (List<T>) from;
        }
        return from.stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
    }
    //Page复制
    public static <F, T> IPage<T> copyPage(IPage<F> from, Class<T> destCls) {
        IPage<T> to = new Page<>();
        if (null != from){
            to.setCurrent(from.getCurrent());
            to.setPages(from.getPages());
            to.setSize(from.getSize());
            to.setTotal(from.getTotal());
            List<T> dls = Lists.newArrayList();
            if (!CollectionUtils.isEmpty(from.getRecords())) {
                dls = from.getRecords().stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
            }
            to.setRecords(dls);
        }
        return to;
    }
    //Page复制到集合
    public static <F, T> List<T> copyPageToList(IPage<F> from, Class<T> destCls) {
        List<T> dls = Lists.newArrayList();
        if (null != from){
            if (!CollectionUtils.isEmpty(from.getRecords())) {
                dls = from.getRecords().stream().map(f -> copy(f, destCls)).collect(Collectors.toList());
            }
        }
        return dls;
    }
}