[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 + "]";
    }

}

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 + "]";
    }

}

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";
    }
    
    

}

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;
    }

}

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

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

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

<%@ 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>

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