Spring MVC 使用@InitBinder转换数据

末蓝、 2022-05-15 01:19 199阅读 0赞

**示例【Spring MVC 使用@InitBinder转换数据】**

**创建MyConverter**

package com.converter;
    import java.beans.PropertyEditorSupport;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    //自定义属性编辑器
    public class MyConverter extends PropertyEditorSupport{
    	// 将传如的字符串数据转换成Date类型
    	@Override
    	public void setAsText(String text) throws IllegalArgumentException {
    		SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
    		try {
    			Date date=df.parse(text);
    			setValue(date);
    		} catch (ParseException e) {
    			e.printStackTrace();
    		}
    	}	
    }

**创建UserController**

package com.controller;
    import java.util.Date;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.WebDataBinder;
    import org.springframework.web.bind.annotation.InitBinder;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import com.converter.MyConverter;
    import com.po.User;
    @Controller
    public class UserController {
    	// 在控制器初始化时注册属性编辑器
    		 @InitBinder
    		  public void initBinder(WebDataBinder binder){
    			// 注册自定义编辑器
    			binder.registerCustomEditor(Date.class, new MyConverter());
    		  }
    	@RequestMapping("/register")
    	public String register(@ModelAttribute User user,Model model) {
    		System.out.println(user);
    		model.addAttribute("user", user);
    		return "success";
    	}
    }

**配置springmvc-config.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:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
    
    <mvc:annotation-driven/>
    
    <context:component-scan base-package="com.*" />
    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    	<property name="prefix" value=""></property>
    	<property name="suffix" value=".jsp" />
    </bean>
    </beans>

**启动Tomcat访问register.jsp**

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[70]: /images/20220515/1814dac774304689a04ffc899fb02eb3.png
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