Struts 标签错误

<bean:write name="invest" property="id"/>
出现错误
Cannot find message resources under key org.apache.struts.action.MESSAGE
而
<bean:write name="invest" property="phasename"/>
正常

我都快烦死了,请大家帮帮忙

public class TinvestPlan {
private int id;
private String phasename;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getPhasename() {
return phasename;
}
public void setPhasename(String phasename) {
this.phasename = phasename;
}
}