Struts2 常见错误

1. 人员管理，设置Timestamp类型生日异常

jsp页面时间选择器是：WdatePicker

<input name="userInfo.userBirth" onclick="WdatePicker({dateFmt:'yyyy-MM-dd '})" readonly="true" cssClass="Wdate" />

异常代码：

Caused by: java.lang.NoSuchMethodException: com.bean.UserInfo.setUserBirth([Ljava.lang.String;)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1246)
... 64 more

#Error setting expression 'userInfo.userBirth' with value '[Ljava.lang.String;@3534c1'|#
ognl.MethodFailedException: Method "setUserBirth" failed for object com.bean.UserInfo@a75e9f [java.lang.NoSuchMethodException: com.bean.UserInfo.setUserBirth([Ljava.lang.String;)]
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1305)
at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1494)
at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85)
at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)
at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)
at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2332)
at ognl.ASTProperty.setValueBody(ASTProperty.java:127)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
at ognl.SimpleNode.setValue(SimpleNode.java:301)
at ognl.ASTChain.setValueBody(ASTChain.java:227)
at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)
at ognl.SimpleNode.setValue(SimpleNode.java:301)
at ognl.Ognl.setValue(Ognl.java:737)
at com.opensymphony.xwork2.ognl.OgnlUtil.setValue(OgnlUtil.java:234)

Caused by: java.lang.NoSuchMethodException: com.bean.UserInfo.setUserBirth([Ljava.lang.String;)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1246)
... 64 more
/-- Encapsulated exception ------------\
java.lang.NoSuchMethodException: com.bean.UserInfo.setUserBirth([Ljava.lang.String;)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1246)
at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1494)
at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85)
at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)
at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)

错误解析：

原因1：由于用户界面传过来的都是String, 本来struts2是可以将String类型转换成Integer或Timestamp, 但是Timestamp类型的字符串格式多样化，struts2不能正确判断，故无法设置 Timestamp类型变量值

原因2：jsp页面设置的是年月日，如2014-03-18，如struts2会报错

解决方案：

1. 定义一个传入参数是String的对于setter,如

public void setUserBirth(Timestamp userBirth) {
System.out.println("setUserBirth Timestamp = "+userBirth);
this.userBirth = userBirth;
}
public void setUserBirth(String userBirth) {
System.out.println("setUserBirth String = "+userBirth);
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
try {
this.setUserBirth( new Timestamp(df.parse(userBirth).getTime()) );
} catch (ParseException e) {
e.printStackTrace();
}
}

Console：

setUserBirth String = 2014-03-18
setUserBirth Timestamp = 2014-03-18 00:00:00.0

2. 将Timestamp类型的都转成String类型

3. 增加一个对于的String变量，如userBirthString