Dozer :列表的字符串到日期字段级别映射
Dozer :列表的字符串到日期字段级别映射
提问于 2015-01-09 16:09:30
我想将一个DTO (都是字符串数据类型)映射到VO (包含字符串、int、布尔值、日期)。
StudentDTO
private StudentDetailDTO student;StudentDetailDTO :
private String sid;
private String name;
private String createDt;
private String studentInd;
private List<FeeReceiptDTO> feeDetails;FeeReceiptDTO:
private String semisterNum;
private String feeAmount;
private String paidOn;StudentDetailVO :
private int sid;
private String name;
private Date createDt;
private boolean studentInd;
private List<FeeReceiptVO> feeDetails;FeeReceiptVO:
private int semisterNum;
private Double feeAmount;
private Date paidOn;我使用DOZZER将我的DTO映射到VO 字符串-日期-DozzerMapping
DozzerMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<mappings xmlns="http://dozer.sourceforge.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://dozer.sourceforge.net http://dozer.sourceforge.net/schema/beanmapping.xsd">
<mapping date-format="MM/dd/yyyy HH:mm" map-null="true" map-empty-string="true" wildcard="true" type="one-way" >
<class-a>com.college.student.dto.StudentDTO</class-a>
<class-b>com.college.student.vo.StudentVO</class-b>
<field>
<a>student.sid</a>
<b>sid</b>
</field>
<field>
<a>student.name</a>
<b>name</b>
</field>
<field>
<a>student.createDt</a>
<b>createDt</b>
</field>
<field>
<a>student.studentInd</a>
<b>studentInd</b>
</field>
<field>
<a date-format="MM/dd/yyyy HH:mm">student.feeDetails</a>
<b>feeDetails</b>
</field>
</mapping>
</mappings>但是，feeDetails中的日期(即，paidOn )无法从字符串到日期格式化。
我做错什么了吗？
我需要只为这个CustomStringToDateConvertor字段编写一个paidOn吗？
错误日志:
ERROR [org.dozer.MappingProcessor] (http-localhost-127.0.0.1-9090-1) Field mapping error -->
MapId: null
Type: null
Source parent class: com.college.student.dto.StudentDTO
Source field name: paidOn
Source field type: class java.lang.String
Source field value: 01/01/2015 01:01
Dest parent class: com.college.student.vo.StudentVO
Dest field name: paidOn
Dest field type: java.util.Date: org.dozer.converters.ConversionException: Unable to determine time in millis of source object
at org.dozer.converters.DateConverter.convert(DateConverter.java:81) [dozer-5.4.0.jar:]
at org.dozer.converters.PrimitiveOrWrapperConverter.convert(PrimitiveOrWrapperConverter.java:70) [dozer-5.4.0.jar:]我试着调试，我发现这个日期的dateFormat将在Dozzer org.dozer.converters.DateConvertor的日期转换器中作为null出现。
我在date-format上定义了field-level，但是对象的List不受影响。
还有别的办法吗？
Stack Overflow用户
回答已采纳
发布于 2015-01-14 11:36:32
因为，Dozer无法转换String-To-Date - At Field Level Mapping for a List。
我为列表定义了一个新的映射，即将它视为一个Object。
我换了DozerMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<mappings xmlns="http://dozer.sourceforge.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://dozer.sourceforge.net http://dozer.sourceforge.net/schema/beanmapping.xsd">
<mapping date-format="MM/dd/yyyy HH:mm" map-null="true" map-empty-string="true" wildcard="true" type="one-way" >
<class-a>com.college.student.dto.FeeReceiptDTO</class-a>
<class-b>com.college.student.vo.FeeReceiptVO</class-b>
</mapping>
<mapping date-format="MM/dd/yyyy HH:mm" map-null="true" map-empty-string="true" wildcard="true" type="one-way" >
<class-a>com.college.student.dto.StudentDTO</class-a>
<class-b>com.college.student.vo.StudentVO</class-b>
<field>
<a>student.sid</a>
<b>sid</b>
</field>
<field>
<a>student.name</a>
<b>name</b>
</field>
<field>
<a>student.createDt</a>
<b>createDt</b>
</field>
<field>
<a>student.studentInd</a>
<b>studentInd</b>
</field>
<field>
<a>student.feeDetails</a>
<b>feeDetails</b>
</field>
</mapping>
</mappings>页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/27864640
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