标签：arraylist exe method 代码 路径 ack const java int
今天学习了Struts的OGNL访问复杂对象和静态方法，现在来总结下。
1、OGNL访问复杂对象
（1）先创建包model、action、在model中创建模型Student（name,age）。action中创建HelloAction
package com.fangchao.action; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.fangchao.model.Student; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class HelloAction extends ActionSupport{ /** * */ private static final long serialVersionUID = 1L; private Student student; private List<Student> students; private Map<String,Student> studentMap; public Student getStudent() { return student; } public void setStudent(Student student) { this.student = student; } public List<Student> getStudents() { return students; } public void setStudents(List<Student> students) { this.students = students; } public Map<String, Student> getStudentMap() { return studentMap; } public void setStudentMap(Map<String, Student> studentMap) { this.studentMap = studentMap; } public static long getSerialversionuid() { return serialVersionUID; } @Override public String execute() throws Exception { ActionContext actonContext=ActionContext.getContext(); student=new Student("fangchao", 23); students=new ArrayList<Student>(); students.add(new Student("fangchao1",21)); students.add(new Student("fangchao2",22)); studentMap=new HashMap<String,Student>(); studentMap.put("good", new Student("fangchao3", 23)); studentMap.put("bad", new Student("fangchao4", 24)); return SUCCESS; } }
前台页面success.jsp（注意在页面上加入<%@taglib prefix="s" uri="/struts-tags" %>）
ognl访问javabean对象： <s:property value="student.name"/> <s:property value="student.age"/><br> ognl访问List对象： <s:property value="students[0].name"/> <s:property value="students[0].age"/><br> <s:property value="students[1].name"/> <s:property value="students[1].age"/><br> ognl访问Map： <s:property value="studentMap[‘good‘].name"/> <s:property value="studentMap[‘good‘].age"/><br> <s:property value="studentMap[‘bad‘].name"/> <s:property value="studentMap[‘bad‘].age"/><br>
2、OGNL访问静态方法
访问静态方法基本同上。除了在struts.xml中加入（<constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant> ）表示可以访问静态方法。
代码如下：
<body> 访问静态属性：<s:property value="@com.fangchao.common.MyStatic@str"/> 访问静态方法：<s:property value="@com.fangchao.common.MyStatic@print()"/> </body>
唯一需要注意的地方是访问时需要加上@符号，同时需要完整的路径访问。
标签：arraylist exe method 代码 路径 ack const java int
原文地址：http://www.cnblogs.com/TigerandRose/p/6516595.html
