blaze

由于引入struts用了UTF-8来编码后，javascript就不能正确输出中文
并非在页面上hidden一些<bean:message/>

应该这样做

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size、index 查看全文

对validate进行的使用，有了一定的认识 查看全文

struts与tomcat版本不同发现的问题 查看全文

最近很忙，没有写东西。

沟通说起来简单，做起来难。

struts学习小记3

1 比较

<logic:greaterEqual>

</logic:greaterEqual>

等同于

>=,用法与小记2中类似

<logic:lessEqual>

</logic:lessEqual>

等同于

<=,用法与小记2中类似

2 对于时间类型的属性的处理

显示：

java.util.Date:<bean:write name="welcomeFeeBean" formatKey="global.formatDate"
property="cardDate"/>

java.util.Calendar:<bean:write name="welcomeFeeBean" formatKey="global.formatDate"
property="cardDate.time"/>

页面form生成bean:

增加类(处理Calendar的处理类,Date型稍作改动):

public class DateConvert implements Converter

{

static SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");

public DateConvert()

{



}

public Object convert(Class type, Object value)

{



if(value==null)return null;

if(((String)value).trim().length()==0) return null;



if(value instanceof String)

{

try

{

Calendar cal=Calendar.getInstance();

cal.setTime(df.parse((String)value));

return cal;

}

catch (Exception ex)

{

throw new ConversionException("输入的日期类型不合乎yyyy-MM-dd"

+ value.getClass());

}



}

else

{

throw new ConversionException("输入的不是字符类型"+value.getClass());

}



}

}

在servlet中注册

ConvertUtils.register(new DateConvert(),java.util.Calendar.class);

对于jsp中的处理，我沿用以前的办法用<%...%>(可能是没找到更好的办法)

3 几点疑问

a)怎样实现

<html:link page="<%=((com.longtop.oa.bean.WelcomeFeeBean)welcomeFeeBean).getBillSource()%>"
target="_blank">

即链接放在库中

　

b)怎样访问页面中的bean

struts学习小记2

1 比较

等于：

<logic:equal name="welcomeFeeBean" property="confirmNum" value="2">
。。。
</logic:equal>

等同于：

if(welcomeFeeBean.confirmNum()==2)

{

}

大于：（不包含=）

<logic:greaterThan name="welcomeFeeBean" property="confirmNum" value="2">

</logic:greaterThan>

等同于：

if(welcomeFeeBean.confirmNum()>2)

{

}

小于：（不包含=）
<logic:lessThan name="welcomeFeeBean" property="confirmNum" value="2">
&nbsp;
</logic:lessThan>

等同于：

if(welcomeFeeBean.confirmNum()<2)

{

}

2 链接

<html:link page='/a.jsp?oper=view' target="_blank" paramId="pid" paramName="welcomeFeeBean" paramProperty="id">

等同于：

<a href="/a.jsp?oper=view&pid=<%=welcomeFeeBean.getId()%>" target="_blank">

3 用反射方法，解决struts中文问题，利用反射，转换编码

public static void beanEnocdePropertySet(Object rec)
{

Field[] fields = rec.getClass().getDeclaredFields();

for (int i = 0; i < fields.length; i++)
{
String tmp = fields[i].getName();
String getMethodName =
"get" + tmp.substring(0, 1).toUpperCase() + tmp.substring(1);
String setMethodName =
"set" + tmp.substring(0, 1).toUpperCase() + tmp.substring(1);

try
{
Method getMethod =
rec.getClass().getMethod(getMethodName, null);
if (getMethod.getReturnType().getName() == "java.lang.String")
{

rec
.getClass()
.getMethod(
setMethodName,
new Class[] { getMethod.getReturnType()})
.invoke(
rec,
new Object[] {
CommonFunction.ISO88592GB2312(
(String) rec.getClass().getMethod(
getMethodName,
null).invoke(
rec,
null))});
}

}
catch (IllegalArgumentException e)
{

e.printStackTrace();
}
catch (SecurityException e)
{

e.printStackTrace();
}
catch (IllegalAccessException e)
{

e.printStackTrace();
}
catch (InvocationTargetException e)
{

e.printStackTrace();
}
catch (NoSuchMethodException e)
{

e.printStackTrace();
}

}
}

struts标签：

1 判断空值

<logic:notPresent scope="request" name="personcols">
<jsp:forward page="/welcomefeesearch.do">
<jsp:param name="type" value='add' />
</jsp:forward>
</logic:notPresent>

<logic:present scope="request" name="personcols">

...

</logic:present>

等同于

personcols=(Collection)request.getAttribute("personcols");

if(personcols==null)

{

response.sendRedirect("/welcomefeesearch.do");

}

else

{

...

}

-------

<logic:present name="welcomeFeeBean" property="manId">
<bean:write name="welcomeFeeBean" property="manId"/>
</logic:present>
<logic:notPresent name="welcomeFeeBean" property="manId">
&nbsp;
</logic:notPresent>

等同于

<%=(welcomeFeeBean==null?"&nbsp;":welcomeFeeBean.getManId()%>

2 显示格式化

方法一：

<bean:write name="welcomeFeeBean" formatKey="global.formatDate" property="makedate.time"/>

在属性文件中配置

global.formatDate=yyyy-MM-dd

方法二：

<bean:write name="welcomeFeeBean" format="￥###,###.###" property="eatFee"/>

<bean:write name="welcomeFeeBean" format="yyyy-MM-dd" property="makedate.time"/>

3 迭代

<logic:iterate>

</logic:iterate>

用迭代生成下拉列表框

<select size="1" name="jiedaidanwei">
<option selected value="-1">请选择接待单位</option>
<logic:iterate id="departmentBean" name="departmentcols" >
<option value="<bean:write name='departmentBean' property='id'/>"><bean:write name="departmentBean" property="name"/></option>
</logic:iterate>
</select>