我是初学者并使用Spring 3.
我有以下豆子
public class Record {
private String title;
private double amount;
//Getter and Setter
}
public class RecordBean {
private List<Record> records;
public RecordBean() {
this.records = LazyList.lazyList(new ArrayList<Record>(), new InstantiateFactory<Record>(Record.class));
}
//Getter and Setter
}
我已将RecordBean
添加到model
modelMap.add('recordBean',new RecordBean());
以下是Spring Form
<form:form action="/save" method="POST" commandName="recordBean">
<form:input path="records[0].title"/>
<form:input path="records[0].amount"/>
<form:input path="records[1].title"/>
<form:input path="records[1].amount"/>
<input type="submit" value="Save"/>
</form:form>
我还在控制器
中添加了InitBinder
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(Double.class, new CustomNumberEditor(Double.class, true));
}
现在,如果我为amount[0]
输入值并为amount[1]
留空并提交表单,则会收到typeMismatch
错误。
Field error in object 'recordBean' on field 'records[1].amount': rejected value []; codes [typeMismatch.recordBean.records[1].amount,typeMismatch.recordBean.records.amount,typeMismatch.records[1].amount,typeMismatch.records.amount,typeMismatch.amount,typeMismatch.double,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [recordBean.records[1].amount,records[1].amount]; arguments []; default message [records[1].amount]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'double' for property 'records[1].amount'; nested exception is java.lang.NumberFormatException: empty String]
请告知。
由于
答案 0 :(得分:1)
也许尝试从这条线路改为:“double”到“Double”:
private double amount;