推荐统一处理    不需要单独处理了

package com.wochanye.ssc.portal.config;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;import java.math.BigInteger;@Configuration
@AutoConfigureAfter(JacksonAutoConfiguration.class)
public class JacksonConfiguration {public JacksonConfiguration(ObjectMapper objectMapper) {SimpleModule module = new SimpleModule();module.addSerializer(new ToStringSerializer(Long.TYPE));module.addSerializer(new ToStringSerializer(Long.class));module.addSerializer(new ToStringSerializer(BigInteger.class));objectMapper.registerModule(module);}}

方法一、使用JsonSerialize注解序列化的时候把Long自动转为String

import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;@JsonSerialize(using = ToStringSerializer.class)
private Long id;

方法二、使用JsonSerialize注解序列化的时候把Long自动转为String

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;@Configuration
@AutoConfigureAfter(JacksonAutoConfiguration.class)
public class JacksonConfiguration {public JacksonConfiguration(ObjectMapper objectMapper) {SimpleModule module = new SimpleModule();module.addSerializer(new ToStringSerializer(Long.TYPE));module.addSerializer(new ToStringSerializer(Long.class));module.addSerializer(new ToStringSerializer(BigInteger.class));objectMapper.registerModule(module);}}