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我使用的是struts 2.1.8和ognl 2.7.3。Struts2 post列表<地圖<String,T>>回到行動
在我的動作類,我有一個字段(地圖的鑰匙:「富」,「棒」):
public class TestAction extends ActionSupport {
private static Log log = LogFactory.getLog(TestAction.class);
private static final long serialVersionUID = -4684320206927996693L;
private List<Map<String, Long>> myData = new ArrayList<Map<String,Long>>();
public TestAction() {
super();
}
public String execute() {
Map<String,Long> obj1 = new HashMap<String,Long>();
obj1.put("foo", 111L);
obj1.put("bar", 112L);
Map<String,Long> obj2 = new HashMap<String,Long>();
obj2.put("foo", 551L);
obj2.put("bar", 552L);
myData.add(obj1);
myData.add(obj2);
return INPUT;
}
public String save() {
log.info("In save()");
log.info("--> " + CollectionUtil.dump(myData));
return SUCCESS;
}
public List<Map<String, Long>> getMyData() {
return myData;
}
public void setMyData(List<Map<String, Long>> myData) {
this.myData = myData;
}
}
我可以顯示在JSP頁面上的內容,但我得到轉換錯誤當我試圖回到行動。
的JSP代碼:
<s:form action="Test_save">
<s:if test="myData != null && myData.size > 0">
<s:iterator value="myData" status="status">
<tr>
<td>
<s:textfield name="myData[%{#status.index}].foo" />
</td>
<td>
<s:textfield name="myData[%{#status.index}].bar" />
</td>
</tr>
</s:iterator>
</s:if>
<s:submit value="Submit"></s:submit>
</s:form>
下面是在日誌文件輸出:
[75913] DEBUG com.opensymphony.xwork2.interceptor.StaticParametersInterceptor debug -> Setting static parameters {} [75913] DEBUG com.opensymphony.xwork2.interceptor.ParametersInterceptor debug -> Setting params myData[0].bar => [ 112 ] myData[0].foo => [ 111 ] myData[1].bar => [ 552 ] myData[1].foo => [ 551 ] [75917] DEBUG com.opensymphony.xwork2.conversion.impl.XWorkConverter debug -> Property: CreateIfNull_myData [75918] DEBUG com.opensymphony.xwork2.conversion.impl.XWorkConverter debug -> Class: com.mcw.web.actions.TestAction [75923] WARN com.opensymphony.xwork2.ognl.OgnlValueStack warn -> Error setting value java.util.Map - Class: java.lang.ClassFile: Class.javaMethod: newInstance0 Line: 340 - java/lang/Class.java:340:-1 at com.opensymphony.xwork2.ognl.accessor.XWorkListPropertyAccessor.getProperty(XWorkListPropertyAccessor.java:102) at ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2210) at ognl.ASTProperty.getValueBody(ASTProperty.java:114) at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) at ognl.SimpleNode.getValue(SimpleNode.java:258) at ognl.ASTChain.setValueBody(ASTChain.java:222) at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220) at ognl.SimpleNode.setValue(SimpleNode.java:301) at ognl.Ognl.setValue(Ognl.java:737) .... Caused by: java.lang.InstantiationException: java.util.Map at java.lang.Class.newInstance0(Class.java:340) at java.lang.Class.newInstance(Class.java:308) at com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:119) at com.opensymphony.xwork2.ognl.accessor.XWorkListPropertyAccessor.getProperty(XWorkListPropertyAccessor.java:100) ... 82 more
我缺少什麼?
你可以顯示你的conversion.properties? – mprabhat
我目前沒有該操作的轉換屬性文件。我有一個用於全局轉換的'xwork-conversion.properties'(但它是一個空文件)。 –
什麼是轉換錯誤,「沒有方法接受一個字符串數組」一個?您是否嘗試在文本字段名稱中使用'['foo']'表示地圖鍵值? –