Struts2框架实现了大多数常见的用于类型转换的转换器，开发人员不用自己编写类型转换代码，就可以实现数据类型的转换。下面一个Struts2框架类型转换的简单事例,
本例可在使用validate()方法进行输入校验 --Struts2框架基础上进行修改。
1、修改BookAction.java：
public class BookAction extends ActionSupport {
private Book book;
public Book getBook() {
return book;
}
public void setBook(Book book) {
this.book = book;
}
public String execute() {
if (book == null || book.getBookName().isEmpty()) {
addActionError("请输入完整的数目信息！");
return INPUT;
} else {
System.out.println("添加的书目信息如下：");
System.out.println("书名：" + book.getBookName());
System.out.println("单价：" + book.getBookPrice());
System.out.println("出版日期：" + book.getBookPublishDate());
System.out.println("数量：" + book.getBookCount());
return SUCCESS;
}
}
}
2、修改addBook.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";
%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'addBook.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<s:actionerror />
<s:form action="addBook">
<s:textfield name="book.bookName" label="书名" />
<s:textfield name="book.bookPrice" label="单价" />
<s:textfield name="book.bookPublishDate" label="出版日期" />
<s:textfield name="book.bookCount" label="数量" />
<s:submit value="提交" />
<s:reset value="重置" />
</s:form>
<s:if test="book.bookName != ''">
添加的书目信息如下：<br>
书名：<s:property value="book.bookName" />
<br>
单价：<s:property value="book.bookPrice" />
<br>
出版日期：<s:property value="book.bookPublishDate" />
<br>
数量：<s:property value="book.bookCount" />
</s:if>
</body>
</html>
3、执行结果
控制台显示类型转换后的信息
