SpringMVC自定义类型转换器实现解析

SpringMVC自定义类型转换器实现解析

这篇文章主要介绍了SpringMVC自定义类型转换器实现解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

页面录入的字符串：2019/12/05可以映射到实体的日期属性上，但是如果是录入2019-12-05就会报错400 http://bad request，想要以2019-12-05日期格式的方式映射到实体的日期属性上，需要自定义类型转换器，主要步骤如下：

1、 自定义类实现Convertro接口

2、Springmvc.xml中配置ConversionServiceFactoryBean，其属性上配置我们自定义的转换器

3、欲使配置的转换器生效，需要将springmvc.xml的改为

1、 自定义类实现Convertro接口

package com.example.util;

import org.springframework.core.convert.converter.Converter;

import org.springframework.util.StringUtils;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

public class StingToDateConvertr implements Converter {

@Override

public Date convert(String s) {

if(StringUtils.isEmpty(s)){

throw new RuntimeException("日期字符串不能为空！");

}

DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

try {

return df.parse(s);

} catch (ParseException e) {

throw new RuntimeException("类型转换出错！");

}

}

}

2、Springmvc.xml中配置ConversionServiceFactoryBean，其属性上配置我们自定义的转换器

3、欲使配置的转换器生效，需要将springmvc.xml的改为

springmvc.xml的完整配置如下：

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:aop="http://springframework.org/schema/aop"

xmlns:c="http://springframework.org/schema/c"

xmlns:cache="http://springframework.org/schema/cache"

xmlns:context="http://springframework.org/schema/context"

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:jee="http://springframework.org/schema/jee"

xmlns:lang="http://springframework.org/schema/lang"

xmlns:mvc="http://springframework.org/schema/mvc"

xmlns:p="http://springframework.org/schema/p"

xmlns:task="http://springframework.org/schema/task"

xmlns:tx="http://springframework.org/schema/tx"

xmlns:util="http://springframework.org/schema/util"

xsi:schemaLocation="http://springframework.org/schema/jee http://springframework.org/schema/jee/spring-jee-4.3.xsd

http://springframework.org/schema/mvc http://springframework.org/schema/mvc/spring-mvc-4.3.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd

http://springframework.org/schema/aop http://springframework.org/schema/aop/spring-aop-4.3.xsd

http://springframework.org/schema/util http://springframework.org/schema/util/spring-util-4.3.xsd

http://springframework.org/schema/jdbc http://springframework.org/schema/jdbc/spring-jdbc-4.3.xsd

http://springframework.org/schema/cache http://springframework.org/schema/cache/spring-cache-4.3.xsd

http://springframework.org/schema/task http://springframework.org/schema/task/spring-task-4.3.xsd

http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/lang http://springframework.org/schema/lang/spring-lang-4.3.xsd

http://springframework.org/schema/tx http://springframework.org/schema/tx/spring-tx-4.3.xsd ">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:aop="http://springframework.org/schema/aop"

xmlns:c="http://springframework.org/schema/c"

xmlns:cache="http://springframework.org/schema/cache"

xmlns:context="http://springframework.org/schema/context"

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:jee="http://springframework.org/schema/jee"

xmlns:lang="http://springframework.org/schema/lang"

xmlns:mvc="http://springframework.org/schema/mvc"

xmlns:p="http://springframework.org/schema/p"

xmlns:task="http://springframework.org/schema/task"

xmlns:tx="http://springframework.org/schema/tx"

xmlns:util="http://springframework.org/schema/util"

xsi:schemaLocation="http://springframework.org/schema/jee http://springframework.org/schema/jee/spring-jee-4.3.xsd

http://springframework.org/schema/mvc http://springframework.org/schema/mvc/spring-mvc-4.3.xsd

http://springframework.org/schema/context http://springframework.org/schema/context/spring-context-4.3.xsd

http://springframework.org/schema/aop http://springframework.org/schema/aop/spring-aop-4.3.xsd

http://springframework.org/schema/util http://springframework.org/schema/util/spring-util-4.3.xsd

http://springframework.org/schema/jdbc http://springframework.org/schema/jdbc/spring-jdbc-4.3.xsd

http://springframework.org/schema/cache http://springframework.org/schema/cache/spring-cache-4.3.xsd

http://springframework.org/schema/task http://springframework.org/schema/task/spring-task-4.3.xsd

http://springframework.org/schema/beans http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/lang http://springframework.org/schema/lang/spring-lang-4.3.xsd

http://springframework.org/schema/tx http://springframework.org/schema/tx/spring-tx-4.3.xsd ">

注意：自定义的类型转换器生效之后，日期格式就只能使用yyyy-MM-dd的格式了，若再使用原有的yyyy/MM/dd格式就会报错！

如有理解不到之处，望指正！

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