解决思路：自己建立el标签，通过静态方法。
代码如下：
1: data.tld
<?xml version="1.0" encoding="UTF-8"?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<tlib-version>1.0</tlib-version>
<short-name>myf</short-name>
<function>
<description>getAppList</description>
<name>getAppList</name>
<!-- 调用EL方法的名称 -->
<function-class>com.tongtech.em.view.application.storage.DataUtils</function-class>
<function-signature>
java.lang.String getAppList(java.lang.String,java.lang.String,java.lang.String)
</function-signature>
<example>${myf:getAppList(1,2)}</example>
<!-- 例如 -->
</function>
</taglib>
2:
类 DataUtils
package com.tongtech.em.view.application.storage;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import com.tongtech.em.master.storage.AppInfo;
import com.tongtech.em.master.storage.ManagerImpl;
import com.tongtech.em.master.storage.StorageAreaInfo;
import com.tongtech.em.master.usermanager.AuthenticationService;
import com.tongtech.em.persistence.usermanager.dataobject.User;
public final class DataUtils {
public static String getAppList(String appId, String areaId, String storageId) {
ManagerImpl applicationService = new ManagerImpl();
List<AppInfo> list = new ArrayList<AppInfo>();
list = applicationService.getAppInfos(areaId, storageId);
StringBuffer temp = new StringBuffer("<select id =\"existNameSelect\" name=\"appNameExist\" theme=\"simple\" onchange=\"changeData(this)\">");
if (StringUtils.isEmpty(appId)) {
temp.append("<option value=\"\" selected>请选择</option>");
} else {
temp.append("<option value=\"\">请选择</option>");
}
for (AppInfo appInfo : list) {
if (appInfo.getAppId().equals(appId)) {
temp.append("<option value=\"" + appInfo.getAppId() + "\" selected>" + appInfo.getAppName() + "</option>");
} else {
temp.append("<option value=\"" + appInfo.getAppId() + "\" >" + appInfo.getAppName() + "</option>");
}
}
temp.append("</select>");
return temp.toString();
}
}
3:页面显示：<%@taglib uri="/WEB-INF/tlds/data.tld" prefix="myf"%>
调用： ${myf:getAppList(appInfo.appId,appInfo.areaId,appInfo.storageId)}