SpringBoot日期格式转换之配置全局日期格式转换器的实例详解

 spring: # 配置日期格式化 jackson: date-format: yyyy-MM-dd HH:mm:ss #时间戳统一转换为指定格式 time-zone: GMT+8 # 时区修改为东8区

 spring.jackson.date-format=yyyy-MM-dd HH:mm:ss	#时间戳统一转换为指定格式 spring.jackson.time-zone=GMT+8	# 时区修改为东8区

 //在pattern上设置自己需要的格式 @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss") private Date createTime;

 //注解将yyyy-MM-dd的形式转换为Date数据 @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date birthday;

 @Temporal(TemporalType.TIMESTAMP) private Date createTime;

 import org.springframework.core.convert.converter.Converter; import org.springframework.stereotype.Component; import org.springframework.util.StringUtils; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; //Converter<S> S: 代表的是源,将要转换的数据类型 T:目标类型,将会转成什么数据类型 @Component public class GlobalFormDateConvert implements Converter { //静态初始化定义日期字符串参数列表（需要转换的） private static final List paramList = new ArrayList(); //静态初始化可能初夏你的日期格式 private static final String param1 = "yyyy-MM"; private static final String param2 = "yyyy-MM-dd"; private static final String param3 = "yyyy-MM-dd HH:mm"; private static final String param4 = "yyyy-MM-dd HH:mm:ss"; //静态代码块，将日期参数加入到列表中 static { paramList.add(param1); paramList.add(param2); paramList.add(param3); paramList.add(param4); } //自定义函数，将字符串转Date 参1：传入的日期字符串 参2：格式参数 public Date parseDate(String source, String format) { System.out.println("parseDate转换日期"); Date date = null; try { //日期格式转换器 DateFormat dateFormat = new SimpleDateFormat(format); date = dateFormat.parse(source); } catch (Exception e) { e.printStackTrace(); } return date; } //convert转换方法 ，s是将会传递过来的日期的字符串 @Override public Date convert(String source) { System.out.println("convert日期格式转换器"); if(StringUtils.isEmpty(source)){ return null; } source = source.trim(); //去除首尾空格 DateFormat dateFormat = new SimpleDateFormat(param1); //正则表达式判断是哪一种格式参数 if (source.matches("^\\d{4}-\\d{1,2}$")) { return parseDate(source, paramList.get(0)); } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$")) { return parseDate(source, paramList.get(1)); } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}$")) { return parseDate(source, paramList.get(2)); } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}:\\d{1,2}$")) { return parseDate(source, paramList.get(3)); } else { throw new IllegalArgumentException("还未定义该种字符串转Date的日期转换格式 --> 【日期格式】：" + source); } } }

 import java.text.FieldPosition; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Date; import com.fasterxml.jackson.databind.util.StdDateFormat; import org.springframework.util.StringUtils; public class GlobalJsonDateConvert extends StdDateFormat { //静态初始化final，共享 public static final GlobalJsonDateConvert instance = new GlobalJsonDateConvert(); //覆盖parse(String)这个方法即可实现 @Override public Date parse(String dateStr, ParsePosition pos) { return getDate(dateStr, pos); } @Override public Date parse(String dateStr) { ParsePosition pos = new ParsePosition(0); return getDate(dateStr, pos); } private Date getDate(String dateStr, ParsePosition pos) { System.out.println("json格式日期转换"); SimpleDateFormat sdf = null; if (StringUtils.isEmpty(dateStr)) { return null; } else if (dateStr.matches("^\\d{4}-\\d{1,2}$")) { sdf = new SimpleDateFormat("yyyy-MM"); return sdf.parse(dateStr, pos); } else if (dateStr.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$")) { sdf = new SimpleDateFormat("yyyy-MM-dd"); return sdf.parse(dateStr, pos); } else if (dateStr.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}$")) { sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm"); return sdf.parse(dateStr, pos); } else if (dateStr.match<i style="color:transparent">来源gaodai$ma#com搞$$代**码)网</i>es("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}:\\d{1,2}$")) { sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.parse(dateStr, pos); } else if (dateStr.length() == 23) { sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); return sdf.parse(dateStr, pos); } return super.parse(dateStr, pos); } @Override public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(date, toAppendTo, fieldPosition); } @Override public GlobalJsonDateConvert clone() { return new GlobalJsonDateConvert(); } }

 import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.databind.ObjectMapper; import com.xgf.online_mall.convert.GlobalFormDateConvert; import com.xgf.online_mall.convert.GlobalJsonDateConvert; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.support.ConversionServiceFactoryBean; import org.springframework.core.convert.ConversionService; import org.springframework.core.convert.converter.Converter; import org.springframework.http.MediaType; import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter; import java.util.ArrayList; import java.util.List; import java.util.HashSet; import java.util.Set; @Configuration public class WebConfig { //JSON格式 全局日期转换器配置 @Bean public MappingJackson2HttpMessageConverter getMappingJackson2HttpMessageConverter() { MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter(); //设置日期格式 ObjectMapper objectMapper = new ObjectMapper(); objectMapper.setDateFormat(GlobalJsonDateConvert.instance); objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper); //设置中文编码格式 List list = new ArrayList(); list.add(MediaType.APPLICATION_JSON_UTF8); mappingJackson2HttpMessageConverter.setSupportedMediaTypes(list); return mappingJackson2HttpMessageConverter; } //表单格式 全局日期转换器 @Bean @Autowired public ConversionService getConversionService(GlobalFormDateConvert globalDateConvert){ ConversionServiceFactoryBean factoryBean = new ConversionServiceFactoryBean(); Set converters = new HashSet(); converters.add(globalDateConvert); factoryBean.setConverters(converters); return factoryBean.getObject(); } }