[原创]java WEB学习笔记68：Struts2 学习之路-- 类型转换与复杂属性配合使用

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 package com.jason.struts2.model;

 import java.util.Date;

 /*
  *
  *
  * */
 public class Manager {

     private String name;
     private Date birth;

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public Date getBirth() {
         return birth;
     }

     public void setBirth(Date birth) {
         this.birth = birth;
     }

     @Override
     public String toString() {
         return "Manager [name=" + name + "]";
     }

 }

Manager

 package com.jason.struts2.model;

 /*
  * 1.Department 是模型，实际录入的Department, deptName, 可以直接写入；manager 属性的处理？
  * Struts2  表单标签的name 值可以被赋为属性的属性：name=manager.name / name=manager.birth
  *
  * 3.manager 中有一个Date 类型的birth 属性，Struts2 是否能完成自动的转换？
  *
  * 全局的类型转换器可以正常工作
  *
  * */
 public class Department {
     private Integer id;
     private String deptName;

     private Manager manager;

     public Integer getId() {
         return id;
     }

     public void setId(Integer id) {
         this.id = id;
     }

     public String getDeptName() {
         return deptName;
     }

     public void setDeptName(String deptName) {
         this.deptName = deptName;
     }

     public Manager getManager() {
         return manager;
     }

     public void setManager(Manager manager) {
         this.manager = manager;
     }

     @Override
     public String toString() {
         return "Department [id=" + id + ", deptName=" + deptName + ", manager="
                 + manager + "]";
     }

 }

Department

 package com.jason.struts2.model;

 import com.opensymphony.xwork2.ActionSupport;
 import com.opensymphony.xwork2.ModelDriven;

 public class TestComplexPropertyAction extends ActionSupport implements ModelDriven<Department>{

     /**
      *  @Fields:serialVersionUID
      */
     private static final long serialVersionUID = 1L;
     private Department department;

     @Override
     public Department getModel() {
         department = new Department();
         return department;
     }

     @Override
     public String execute() throws Exception {
         System.out.println(department);
         return "success";
     }

 }

TestComplexPropertyAction

 package com.jason.strut2.conversion;

 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.Map;

 import javax.servlet.ServletContext;
 import javax.xml.crypto.Data;

 import org.apache.struts2.ServletActionContext;
 import org.apache.struts2.util.StrutsTypeConverter;

 import com.opensymphony.xwork2.ActionContext;
 import com.sun.jndi.url.dns.dnsURLContext;

 public class DateConverter extends StrutsTypeConverter {

     private DateFormat dateFormat;

     public void setDateFormat(DateFormat dateFormat) {
         //获取当前web应用下的初始化参数

         ServletContext servletContext = ServletActionContext.getServletContext();
         String pattern = servletContext.getInitParameter("datePattern");
         dateFormat = new SimpleDateFormat(pattern);

     }

     public DateFormat getDateFormat() {
         return dateFormat;
     }

     @Override
     public Object convertFromString(Map context, String[] values, Class toClass) {

         System.out.println("convertFromString ... ");
         if(toClass == Data.class){
             if(values != null && values.length > 0){
                 String value = values[0];
                 try {
                     return getDateFormat().parseObject(value);
                 } catch (ParseException e) {

                     e.printStackTrace();
                 }
             }
         }
         //若没有转换成功，则返回values
         return values;
     }

     @Override
     public String convertToString(Map context, Object o) {
         System.out.println("convertToString ...");
         if( o instanceof Date){
             Date date = (Date) o;
             return getDateFormat().format(date);
         }
         //若转换失败，则返回null
         return null;
     }

 }

DateConverter

 java.util.Date=com.jason.strut2.conversion.DateConverter

xwork-conversion.properties

 <context-param>
       <param-name>datePattern</param-name>
       <param-value>yyyy-MM-dd hh:mm:ss</param-value>
   </context-param>
   

web.xml

 <action name="testComplexPropertyAction" class="com.jason.struts2.model.TestComplexPropertyAction">
              <result>/success.jsp</result>
          </action>

strut.xml

 <%@ 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:form action="testComplexPropertyAction">
         <s:textfield name="deptName" label="DeptName"></s:textfield>
         <!-- 映射属性的属性 -->
         <s:textfield name="manager.name" label="ManagerName"></s:textfield>
         <s:textfield name="manager.birth" label="ManagerBirth"></s:textfield>

         <s:submit></s:submit>
     </s:form>

 </body>
 </html>

complex-property.jsp

核心点：

　　1.struts 的表单标签支持：映射属性的属性

　　

 <s:form action="testComplexPropertyAction">
         <s:textfield name="deptName" label="DeptName"></s:textfield>
         <!-- 映射属性的属性 -->
         <s:textfield name="manager.name" label="ManagerName"></s:textfield>
         <s:textfield name="manager.birth" label="ManagerBirth"></s:textfield>

         <s:submit></s:submit>
     </s:form>

　　2.通过配置全局的：类型转换类，和配置。进行类型自动的转换

　　　　xwork-conversion.properties

　　

 java.util.Date=com.jason.strut2.conversion.DateConverter