Mybatis 使用@requestbody 日期自定义转换

通常情况下，使用@requestbody json这种传参格式的时候 日期转换可能会遇到的问题。

查看源码

/**
* Defines a commonly used date format that conforms
* to ISO-8601 date formatting standard, when it includes basic undecorated
* timezone definition
*/
protected final static String DATE_FORMAT_STR_ISO8601 = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";

/**
* Same as 'regular' 8601, but handles 'Z' as an alias for "+0000"
* (or "GMT")
*/
protected final static String DATE_FORMAT_STR_ISO8601_Z = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";

/**
* ISO-8601 with just the Date part, no time
*/
protected final static String DATE_FORMAT_STR_PLAIN = "yyyy-MM-dd";

/**
* This constant defines the date format specified by
* RFC 1123 / RFC 822.
*/
protected final static String DATE_FORMAT_STR_RFC1123 = "EEE, dd MMM yyyy HH:mm:ss zzz";

只支持这几种格式 日期转换。因此遇到了各种坑，特此分享。

解决方案如下：

<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<!-- <constructor-arg>
<bean class="com.fasterxml.jackson.databind.ObjectMapper">
<property name="dateFormat">
<bean class="java.text.SimpleDateFormat">
<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />
</bean>
</property>
</bean>
</constructor-arg> -->
<property name="objectMapper">
<bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
<property name="featuresToEnable">
<array>
<util:constant static-field="com.fasterxml.jackson.databind.SerializationFeature.WRAP_ROOT_VALUE" />
</array>
</property>
<property name="dateFormat">
<!-- 智能日期转换 -->
<bean class="com.dateformatx.SmartDateFormat"/>
</property>
</bean>
</property>
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>

</bean>

我们可以自己去定义一个日期转换类

package com.dateformatx;

import java.text.FieldPosition;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
* Description: 智能日期转换
* Author:
*/
public class SmartDateFormat extends SimpleDateFormat {
/**
*
*/
private static final long serialVersionUID = 6517753776479429611L;

@Override
public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition pos) {
return new StringBuffer(DateUtil.smartFormat(date));
}

@Override
public Date parse(String text) throws ParseException {
return DateUtil.smartFormat(text);
}
}

package com.dateformatx;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.lang3.StringUtils;

/**
* DateUtil类
*
* @author
*/
public class DateUtil {

public static final String Y_M_D = "yyyy-MM-dd";
public static final String Y_M_D_HM = "yyyy-MM-dd HH:mm";
public static final String Y_M_D_HMS = "yyyy-MM-dd HH:mm:ss";
public static final String YMD = "yyyyMMdd";
public static final String YMDHM = "yyyyMMddHHmm";
public static final String YMDHMS = "yyyyMMddHHmmss";
public static final String ymd = "yyyy/MM/dd";
public static final String ymd_HM = "yyyy/MM/dd HH:mm";
public static final String ymd_HMS = "yyyy/MM/dd HH:mm:ss";
public static final String Y_M = "yyyy-MM";

/**
* 智能转换日期
*
* @param date
* @return
*/
public static String smartFormat(Date date) {
String dateStr = null;
if (date == null) {
dateStr = "";
} else {
try {
dateStr = formatDate(date, Y_M_D_HMS);
//时分秒
if (dateStr.endsWith(" 00:00:00")) {
dateStr = dateStr.substring(0, 10);
}
//时分
else if (dateStr.endsWith("00:00")) {
dateStr = dateStr.substring(0, 16);
}
//秒
else if (dateStr.endsWith(":00")) {
dateStr = dateStr.substring(0, 16);
}
} catch (Exception ex) {
throw new IllegalArgumentException("转换日期失败: " + ex.getMessage(), ex);
}
}
return dateStr;
}

/**
* 智能转换日期
*
* @param text
* @return
*/
public static Date smartFormat(String text) {
Date date = null;
try {
if (text == null || text.length() == 0) {
date = null;
} else if (text.length() == 10) {
date = formatStringToDate(text, Y_M_D);
} else if (text.length() == 13) {
date = new Date(Long.parseLong(text));
} else if (text.length() == 16) {
date = formatStringToDate(text, Y_M_D_HM);
} else if (text.length() == 19) {
date = formatStringToDate(text, Y_M_D_HMS);
}else if (text.length() == 7) {
date = formatStringToDate(text, Y_M);
}else {
throw new IllegalArgumentException("日期长度不符合要求!");
}
} catch (Exception e) {
throw new IllegalArgumentException("日期转换失败!");
}
return date;
}

/**
* 获取当前日期
* @param format
* @return
* @throws Exception
*/
public static String getNow(String format) throws Exception{
return formatDate(new Date(), format);
}

/**
* 格式化日期格式
*
* @param argDate
* @param argFormat
* @return 格式化后的日期字符串
*/
public static String formatDate(Date argDate, String argFormat) throws Exception {
if (argDate == null) {
throw new Exception("参数[日期]不能为空!");
}
if (StringUtils.isEmpty(argFormat)) {
argFormat = Y_M_D;
}
SimpleDateFormat sdfFrom = new SimpleDateFormat(argFormat);
return sdfFrom.format(argDate).toString();
}

/**
* 把字符串格式化成日期
*
* @param argDateStr
* @param argFormat
* @return
*/
public static Date formatStringToDate(String argDateStr, String argFormat) throws Exception {
if (argDateStr == null || argDateStr.trim().length() < 1) {
throw new Exception("参数[日期]不能为空!");
}
String strFormat = argFormat;
if (StringUtils.isEmpty(strFormat)) {
strFormat = Y_M_D;
if (argDateStr.length() > 16) {
strFormat = Y_M_D_HMS;
} else if (argDateStr.length() > 10) {
strFormat = Y_M_D_HM;
} else if(argDateStr.length() ==7 ){
strFormat = Y_M;
}
}
SimpleDateFormat sdfFormat = new SimpleDateFormat(strFormat);
//严格模式
sdfFormat.setLenient(false);
try {
return sdfFormat.parse(argDateStr);
} catch (ParseException e) {
throw new Exception(e);
}
}
}