bytesailing-mail/src/main/java/com/fjhx/email/config/WebMvcConfig.java

package com.fjhx.email.config;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fjhx.email.utils.PageWrapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.List;

/**
 * WebMvc配置
 */
@EnableWebMvc
@Configuration
@SuppressWarnings({"unchecked", "rawtypes"})
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * webMvc序列化
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();

        ObjectMapper objectMapper = converter.getObjectMapper()
                // 时间格式化
                .setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"))
                .registerModule(new SimpleModule()
                        // 将Long转换成String
                        .addSerializer(Long.class, ToStringSerializer.instance)
                        // 将Page转成PageWrapper
                        .addSerializer(IPage.class, new JsonSerializer<IPage>() {
                            @Override
                            public void serialize(IPage page, JsonGenerator jg, SerializerProvider sp) throws IOException {
                                jg.writeObject(new PageWrapper(page));
                            }
                        })
                );

        converter.setObjectMapper(objectMapper);
        converters.add(converter);
    }

}