自定义日期类型的数据绑定前台 - 后台或后台

第一,, 前台表单中,有一个日期 2014-03-11 提交到后台类型为date 时,会报一个转换类错误如下错误

default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'sdate';

因为springMVC不会自动转换.

解决办法

[java] view plain copy

package com.lanyuan.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.support.WebBindingInitializer;
import org.springframework.web.context.request.WebRequest;
/**
* spring3 mvc 的日期传递[前台-后台]bug:
* org.springframework.validation.BindException
* 的解决方式.包括xml的配置
* new SimpleDateFormat("yyyy-MM-dd"); 这里的日期格式必须与提交的日期格式一致
* @author lanyuan
* Email：mmm333zzz520@163.com
* date：2014-3-20
*/
public class SpringMVCDateConverter implements WebBindingInitializer {
public void initBinder(WebDataBinder binder, WebRequest request) {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, new CustomDateEditor(df,true));
}
}

然后在springmvc的配置文件 spring-servlet.xml 上加一个段, 重点在于红色字体

[html] view plain copy

<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
<span style="color:#ff0000;"><property name="webBindingInitializer">
<bean class="com.lanyuan.util.SpringMVCDateConverter" />
</property></span>
</bean>

第二: 后台回返前台时, 日期格式是Unix时间戳

例如后台data : 2014-03-11 20:22:25 返回前台json的时间戳是1394508055 很明显这不是我的要的结果, 我们需要的是 2014-03-11 20:22:25

解决办法,在controller下新建这个类,然后在javabean的get方法上加上@JsonSerialize(using=JsonDateSerializer.class)

[java] view plain copy

package com.lanyuan.controller;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonProcessingException;
import org.codehaus.jackson.map.JsonSerializer;
import org.codehaus.jackson.map.SerializerProvider;
import org.springframework.stereotype.Component;
/**
* springMVC返回json时间格式化
* 解决SpringMVC使用@ResponseBody返回json时，日期格式默认显示为时间戳的问题。
* 需要在get方法上加上@JsonSerialize(using=JsonDateSerializer.class)
* @author lanyuan
* Email：mmm333zzz520@163.com
* date：2014-2-17
*/
@Component
public class JsonDateSerializer extends JsonSerializer<Date>{
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public void serialize(Date date, JsonGenerator gen, SerializerProvider provider) throws IOException, JsonProcessingException {
String formattedDate = dateFormat.format(date);
gen.writeString(formattedDate);
}
}

结语: 前台 - 后台或后台 - 前台互相转换方法有多种,. 这些只是之一,供参考!

转自http://blog.csdn.net/mmm333zzz/article/details/21696653

SpringMVC自定义日期类型的数据绑定

应用场景
实现方法

[一]、应用场景

在实际应用中，经常会碰到表单中的日期字符串和Javabean中的日期类型的属性自动转换，一般页面输入的日志格式为：yyyy-MM-dd ,而SpringMVC中默认不支持这样的格式转换，所以需要我们自定义数据类型的绑定才能实现这个功能。

[二]、实现方法

利用 WebBindingInitializer 注册自定义日期转换控制器。

自定义日期转换器：MyDataBinding.java

package com.micmiu.demo.web.v1.utils;

import java.text.SimpleDateFormat;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.support.WebBindingInitializer;
import org.springframework.web.context.request.WebRequest;

/**
 * 自定义日期、时间的类型绑定
 *
 * @author &lt;a href="http://www.micmiu.com"&gt;Michael Sun&lt;/a&gt;
 */
public class MyDataBinding implements WebBindingInitializer {

	public void initBinder(WebDataBinder binder, WebRequest request) {
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
		dateFormat.setLenient(false);

		SimpleDateFormat datetimeFormat = new SimpleDateFormat(
				"yyyy-MM-dd HH:mm:ss");
		datetimeFormat.setLenient(false);

		binder.registerCustomEditor(java.util.Date.class, new CustomDateEditor(
				dateFormat, true));
		binder.registerCustomEditor(java.sql.Timestamp.class,
				new CustomTimestampEditor(datetimeFormat, true));
	}
}

package com.micmiu.demo.web.v1.utils;

import java.text.SimpleDateFormat;

import org.springframework.beans.propertyeditors.CustomDateEditor;

import org.springframework.web.bind.WebDataBinder;

import org.springframework.web.bind.support.WebBindingInitializer;

import org.springframework.web.context.request.WebRequest;

/**

* 自定义日期、时间的类型绑定

* @author <a href="http://www.micmiu.com">Michael Sun</a>

public class MyDataBinding implements WebBindingInitializer {

public void initBinder(WebDataBinder binder, WebRequest request) {

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

dateFormat.setLenient(false);

SimpleDateFormat datetimeFormat = new SimpleDateFormat(

"yyyy-MM-dd HH:mm:ss");

datetimeFormat.setLenient(false);

binder.registerCustomEditor(java.util.Date.class, new CustomDateEditor(

dateFormat, true));

binder.registerCustomEditor(java.sql.Timestamp.class,

new CustomTimestampEditor(datetimeFormat, true));

}

Timestamp 的实现：CustomTimestampEditor.java

package com.micmiu.demo.web.v1.utils;

import java.beans.PropertyEditorSupport;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import org.springframework.util.StringUtils;
import java.text.ParseException;

/**
 * Property editor for &lt;code&gt;java.sql.Timestamp&lt;/code&gt;,&lt;br&gt;
 * supporting a custom &lt;code&gt;java.text.DateFormat&lt;/code&gt;.
 *
 * @author &lt;a href="http://www.micmiu.com"&gt;Michael Sun&lt;/a&gt;
 */
public class CustomTimestampEditor extends PropertyEditorSupport {

	private final SimpleDateFormat dateFormat;
	private final boolean allowEmpty;
	private final int exactDateLength;

	public CustomTimestampEditor(SimpleDateFormat dateFormat, boolean allowEmpty) {
		this.dateFormat = dateFormat;
		this.allowEmpty = allowEmpty;
		this.exactDateLength = -1;
	}

	public CustomTimestampEditor(SimpleDateFormat dateFormat,
			boolean allowEmpty, int exactDateLength) {
		this.dateFormat = dateFormat;
		this.allowEmpty = allowEmpty;
		this.exactDateLength = exactDateLength;
	}

	public void setAsText(String text) throws IllegalArgumentException {
		if ((this.allowEmpty) &amp;&amp; (!(StringUtils.hasText(text)))) {
			setValue(null);
		} else {
			if ((text != null) &amp;&amp; (this.exactDateLength &gt;= 0)
					&amp;&amp; (text.length() != this.exactDateLength)) {
				throw new IllegalArgumentException(
						"Could not parse date: it is not exactly"
								+ this.exactDateLength + "characters long");
			}
			try {
				setValue(new Timestamp(this.dateFormat.parse(text).getTime()));
			} catch (ParseException ex) {
				throw new IllegalArgumentException("Could not parse date: "
						+ ex.getMessage(), ex);
			}
		}
	}

	public String getAsText() {
		Timestamp value = (Timestamp) getValue();
		return ((value != null) ? this.dateFormat.format(value) : "");
	}
}

package com.micmiu.demo.web.v1.utils;

import java.beans.PropertyEditorSupport;

import java.sql.Timestamp;

import java.text.SimpleDateFormat;

import org.springframework.util.StringUtils;

import java.text.ParseException;

/**

* Property editor for <code>java.sql.Timestamp</code>,<br>

* supporting a custom <code>java.text.DateFormat</code>.

* @author <a href="http://www.micmiu.com">Michael Sun</a>

public class CustomTimestampEditor extends PropertyEditorSupport {

private final SimpleDateFormat dateFormat;

private final boolean allowEmpty;

private final int exactDateLength;

public CustomTimestampEditor(SimpleDateFormat dateFormat, boolean allowEmpty) {

this.dateFormat = dateFormat;

this.allowEmpty = allowEmpty;

this.exactDateLength = -1;

}

public CustomTimestampEditor(SimpleDateFormat dateFormat,

boolean allowEmpty, int exactDateLength) {

this.dateFormat = dateFormat;

this.allowEmpty = allowEmpty;

this.exactDateLength = exactDateLength;

}

public void setAsText(String text) throws IllegalArgumentException {

if ((this.allowEmpty) && (!(StringUtils.hasText(text)))) {

setValue(null);

} else {

if ((text != null) && (this.exactDateLength >= 0)

&& (text.length() != this.exactDateLength)) {

throw new IllegalArgumentException(

"Could not parse date: it is not exactly"

+ this.exactDateLength + "characters long");

}

try {

setValue(new Timestamp(this.dateFormat.parse(text).getTime()));

} catch (ParseException ex) {

throw new IllegalArgumentException("Could not parse date: "

+ ex.getMessage(), ex);

}

public String getAsText() {

Timestamp value = (Timestamp) getValue();

return ((value != null) ? this.dateFormat.format(value) : "");

}

修改spring-mvc 的配置文件，添加 webBindingInitializer 属性的注入配置：

<!--Spring3.1 之后的自定义注解 HandlerAdapter -->
<bean
	class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
	<property name="webBindingInitializer">
		<bean class="com.micmiu.demo.web.v1.utils.MyDataBinding" />
	</property>
	<property name="messageConverters">
		<list>
			<bean
				class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
			<bean
				class="org.springframework.http.converter.StringHttpMessageConverter">
				<property name="writeAcceptCharset" value="false" />
				<property name="supportedMediaTypes">
					<list>
						<value>text/plain;charset=UTF-8</value>
						<value>*/*;charset=UTF-8</value>
					</list>
				</property>
			</bean>
			<bean
				class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />
			<bean
				class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter" />
			<bean
				class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
		</list>
	</property>
</bean>

<bean

class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">

</property>

<list>

<bean

class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />

<bean

class="org.springframework.http.converter.StringHttpMessageConverter">

<list>

<value>text/plain;charset=UTF-8</value>

<value>*/*;charset=UTF-8</value>

</list>

</property>

</bean>

<bean

class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />

<bean

class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter" />

<bean

class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>

</list>

</property>

</bean>

这样就可以实现表单中的字符串自动转换为Date或者Timestamp 类型。

本文介绍到此结束@Michael Sun.

转自http://www.micmiu.com/j2ee/spring/springmvc-binding-date/

自定义日期类型的数据绑定前台 - 后台或后台 - 前台互相转换

SpringMVC自定义日期类型的数据绑定

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自定义日期类型的数据绑定 前台 - 后台 或 后台 - 前台 互相转换

SpringMVC自定义日期类型的数据绑定

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自定义日期类型的数据绑定前台 - 后台或后台 - 前台互相转换