Springmvc框架-提交数据处理

将提交参数直接进行实体类的封装

springmvc-test.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans 
      xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:context="http://www.springframework.org/schema/context"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
	  xmlns:mvc="http://www.springframework.org/schema/mvc"
      xsi:schemaLocation="
      
	  http://www.springframework.org/schema/beans 
	  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	  
	  http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-3.0.xsd
 	  
	  http://www.springframework.org/schema/aop 
	  http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
	  
	  http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        
      ">

       <!-- 
    可选
    	映射器(框架) 将bean标签的name属性当作URL请求
     -->  
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>  
      
    <!--
    可选
    	适配器(框架) 寻找实现了Controller接口的Action类
    	也能去找继承了AbstractCommandController类的Action
    -->  
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
      
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    	<!-- 路径前缀 -->
    	<property name="prefix" value="/jsp/"></property>
    	<!-- 路径后缀 -->
    	<property name="suffix" value=".jsp"></property>
    	<!-- 前缀+视图逻辑名+后缀=真实路径 -->
    </bean>
    
    
    <bean name="/add.action" class="test.EmpAction"></bean>
    
    
</beans>

Emp.java

package test;

public class Emp {

	private String username;
	private String gender;
	private String hiredate;
	
	public String getHiredate() {
		return hiredate;
	}

	public void setHiredate(String hiredate) {
		this.hiredate = hiredate;
	}

	public Emp() {
		
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getGender() {
		return gender;
	}

	public void setGender(String gender) {
		this.gender = gender;
	}
}

EmpAction.java

package test;

import java.sql.Date;
import java.text.SimpleDateFormat;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.validation.BindException;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractCommandController;

@SuppressWarnings("deprecation")
public class EmpAction extends AbstractCommandController{

	public EmpAction() {
		//自动将表单参数封装到Emp对象中去
		this.setCommandClass(Emp.class);
		
	}
	
	/*
	 * 自定义类型转换器，将String->Date类型（格式yyyy-MM-dd)
	 * */
	@Override
	protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception {
		
		/*
		 * 向springmvc内部注入一个自定义的类型转换器
		 * 参数一：将String转成什么类型的字节码
		 * 参数二：自定义转换规则
		 * true表示该日期字段可以为空
		 * */
		binder.registerCustomEditor(Date.class,new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));
	}
	
	
	/*
	 * obj表示封装后的实体
	 * error表示封装时产生的异常
	 * */
	
	@Override
	protected ModelAndView handle(
			HttpServletRequest request, 
			HttpServletResponse response, 
			Object obj, 
			BindException error)
			throws Exception {
		request.setCharacterEncoding("utf-8");
		ModelAndView modelAndView = new ModelAndView();
		modelAndView.addObject("message","增加员工成功");
		
		Emp emp = (Emp)obj;
		System.out.println(emp.getUsername()+":"+emp.getGender()+":"+emp.getHiredate());
		
		//将Emp封装到ModelAndView对象中
		modelAndView.addObject("emp",emp);
		
		modelAndView.setViewName("success");
		
		return modelAndView;
	}

	
	
}

success.jsp

<%@ page language="java" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <body>
	success.jsp<br/>
	成功<br/>
	${requestScope.message}<br/>
	姓名：${requestScope.emp.username}<br/>
	性别：${requestScope.emp.gender}<br/>
	
	入职时间：${requestScope.emp.hiredate}<br/>
	<hr/>
	
	<!-- 
	入职时间：<fmt:formatDate 
				value="${requestScope.emp.hiredate}"
				type="date"
				dateStyle="medium"
			/>
	< % @ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" % >
		1)fmt:formatDate 来源于 http://java.sun.com/jsp/jstl/fmt
		2)fmt:formatDate作用是格式化日期的显示，例如：2015年5月10日 星期日
		3)value表示需要格式化的值
		4)type表示显示日期,时间,都显示
		  type=date表示只显示日期
		  type=time表示只显示时间
		  type=both表示日期时间均显示
		5)dateStyle表示显示日期的格式：short/medium/default/long/full
	-->
	
  </body>
</html>

输出结果

success.jsp
成功
增加员工成功
姓名：123
性别：男
入职时间：2015-5-10