structs2标签简单实用，及自定义转换器示例代码
一、在structs.xml中配置
<structs> <package name="tagp" namespace="/test" extends="struts-default"> <action name="TagDemo" class="cn.hjp.test.TagDemo"> <result name="success" type="dispatcher">/tag/Index2.jsp</result> </action> </package> </structs>
二、首页Index.jsp页面代码：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body>
<span style="color:red">生日日期格式：yyyy/MM/dd</span> <s:form action="TagDemo" namespace="/test"> <s:textfield name="name" label="姓名"></s:textfield> <s:textfield name="sex" label="性别"></s:textfield> <s:textfield name="age" label="年龄"></s:textfield> <s:textfield name="birthday" label="生日"></s:textfield> <s:submit value="提交"></s:submit> </s:form> </body> </html>
三、Action代码（注意要引用对包）：
如果想实现下面的自动装配，必须这样生成属性setter和getter
public class TagDemo extends ActionSupport { private String name; private char sex; private int age; private Date birthday; public String getName() { return name; } public void setName(String name) { this.name = name; } public char getSex() { return sex; } public void setSex(char sex) { this.sex = sex; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } @Override public String execute() throws Exception { // TODO Auto-generated method stub System.out.println(this.toString()); return SUCCESS; } @Override public String toString() { return "TagDemo [name=" + name + ", sex=" + sex + ", age=" + age + ", birthday=" + birthday + "]"; } }
四、自定义的转换器类（注意引用对包）：
public class MyDateConverter extends DefaultTypeConverter { @Override public Object convertValue(Object value, Class toType) { // TODO Auto-generated method stub SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd"); if (toType == Date.class) { String[] params = (String[]) value; try { return simpleDateFormat.parse(params[0]); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if (toType == String.class) { Date date = (Date) value; return simpleDateFormat.format(date); } throw new RuntimeException("错误"); } }
五、下面就是配置如何使用自定义的转换器类，分两种：
1、如果只想对某个包下Action里的字段进行格式化，就要在这个包下（和action类同级）新建properties文件，依据上面示例则要建文件TagDemo-conversion.properties
代码：birthday=cn.hjp.test.MyDateConverter
2、如果要对所有时间类型格式化，则要在src根下新建文件xwork-conversion.properties
代码：java.util.Date=cn.hjp.test.MyDateConverter
六、action返回的页面，如果实现页面值的自动加载，也要使用structs标签，Index2.jsp页面代码如下，
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <s:textfield name="name" label="姓名"></s:textfield> <s:textfield name="sex" label="性别"></s:textfield> <s:textfield name="age" label="年龄"></s:textfield> <s:textfield name="birthday" label="生日"></s:textfield> </body> </html>
