推土机：列表的字符串到日期字段级别映射

Question

我想将DTO （都属于String数据类型）映射到VO （包含String，int，boolean，Date）

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;

我正在使用DOZZER将我的DTO映射到VO String-to-Date-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 ）无法从字符串格式转换为日期。

难道我做错了什么？

我是否需要为此paidOn字段编写一个CustomStringToDateConvertor ？

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:]

我尝试调试，发现该日期的dateFormat在Dozzer org.dozer.converters.DateConvertor的Date转换器中为null 。

我在field-level定义了date-format ，但它对“对象List ”没有影响。

还有其他方法吗？

Answer 1

As，Dozer无法为列表转换String-To-Date - At Field Level Mapping for a List 。

我已经为列表定义了一个新的映射，即将其视为一个Object

我更改了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>