JSON格式化,详细介绍！

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对于date类型的转化一直是json中比较复杂的事情，我这只提出一种自己会的方式与大家分享，如果还好更好的方式别忘记告诉我学习下嘿嘿在这先谢了

对于date类型直接转化如下

Java代码

1. java.util.Date testDate = new Date();  
2. JSONObject jsonFromDate = JSONObject.fromObject(testDate);  
3. System.out.println(jsonFromDate);  
4. //prints {"date":26,"day":1,"hours":11,"minutes":30,"month":9,"seconds":18,"time":1256527818296,"timezoneOffset":-480,"year":109} 

		java.util.Date testDate = new Date();
		JSONObject jsonFromDate = JSONObject.fromObject(testDate);
		System.out.println(jsonFromDate);
		//prints {"date":26,"day":1,"hours":11,"minutes":30,"month":9,"seconds":18,"time":1256527818296,"timezoneOffset":-480,"year":109}

上述转化后的格式明显不利于我们使用，下面介绍我的方法

Java代码

1. //注册date类型的转化方式  
2. JsonConfig jsonConfig = new JsonConfig();  
3. jsonConfig.registerJsonValueProcessor(java.util.Date.class, new JsonValueProcessorImplTest());  
4.    
5. JSONObject jsonFromBean = JSONObject.fromObject(testBean,jsonConfig);  
6. System.out.println(jsonFromBean);  
7.  
8. //prints {"birthday":"2009-10-26","id":"id","name":"name"}  
9.  
10. String[] dateFormats = new String[] {"yyyy/MM/dd","yyyy-MM-dd"};   
11. JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats));   
12. TestBean jsonToBean = (TestBean)JSONObject.toBean(jsonFromBean,TestBean.class);  
13. System.out.println(jsonToBean);  
14. //prints TestBean@1126b07[id=id,name=name,birthday=Mon Oct 26 00:00:00 CST 2009] 

		//注册date类型的转化方式
		 JsonConfig jsonConfig = new JsonConfig();
		 jsonConfig.registerJsonValueProcessor(java.util.Date.class, new JsonValueProcessorImplTest());
		 
		JSONObject jsonFromBean = JSONObject.fromObject(testBean,jsonConfig);
		System.out.println(jsonFromBean);
		
		//prints {"birthday":"2009-10-26","id":"id","name":"name"}
		
		String[] dateFormats = new String[] {"yyyy/MM/dd","yyyy-MM-dd"}; 
		JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats)); 
		TestBean jsonToBean = (TestBean)JSONObject.toBean(jsonFromBean,TestBean.class);
		System.out.println(jsonToBean);
		//prints TestBean@1126b07[id=id,name=name,birthday=Mon Oct 26 00:00:00 CST 2009]

其中需要的类如下：

1.准备测试数据

Java代码

1. import java.util.Date;  
2.  
3. import org.apache.commons.lang.builder.ReflectionToStringBuilder;  
4.  
5. public class TestBean {  
6.  
7.     private String id;  
8.     private String name;  
9.     private java.util.Date birthday;  
10.  
11.     public TestBean() {  
12.         super();  
13.     }  
14.  
15.     public TestBean(String id, String name, Date birthday) {  
16.         super();  
17.         this.id = id;  
18.         this.name = name;  
19.         this.birthday = birthday;  
20.     }  
21.  
22.     public String getId() {  
23.         return id;  
24.     }  
25.  
26.     public void setId(String id) {  
27.         this.id = id;  
28.     }  
29.  
30.     public String getName() {  
31.         return name;  
32.     }  
33.  
34.     public void setName(String name) {  
35.         this.name = name;  
36.     }  
37.  
38.     public java.util.Date getBirthday() {  
39.         return birthday;  
40.     }  
41.  
42.     public void setBirthday(java.util.Date birthday) {  
43.         this.birthday = birthday;  
44.     }  
45.  
46.     public String toString() {  
47.         return ReflectionToStringBuilder.toString(this);  
48.     }  
49.  
50. } 

import java.util.Date;

import org.apache.commons.lang.builder.ReflectionToStringBuilder;

public class TestBean {

	private String id;
	private String name;
	private java.util.Date birthday;

	public TestBean() {
		super();
	}

	public TestBean(String id, String name, Date birthday) {
		super();
		this.id = id;
		this.name = name;
		this.birthday = birthday;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public java.util.Date getBirthday() {
		return birthday;
	}

	public void setBirthday(java.util.Date birthday) {
		this.birthday = birthday;
	}

	public String toString() {
		return ReflectionToStringBuilder.toString(this);
	}

}

2.创建date格式化类

Java代码

1. import java.text.SimpleDateFormat;  
2. import java.util.Date;  
3.  
4. import net.sf.json.JsonConfig;  
5. import net.sf.json.processors.JsonValueProcessor;  
6.  
7. public class JsonValueProcessorImplTest implements JsonValueProcessor {  
8.     private String format = "yyyy-MM-dd";  
9.  
10.       
11.     public JsonValueProcessorImplTest() {  
12.         super();  
13.     }  
14.  
15.     public JsonValueProcessorImplTest(String format) {  
16.         super();  
17.         this.format = format;  
18.     }  
19.  
20.     @Override 
21.     public Object processArrayValue(Object value, JsonConfig jsonConfig) {  
22.         String[] obj = {};  
23.         if (value instanceof Date[]) {  
24.             SimpleDateFormat sf = new SimpleDateFormat(format);  
25.             Date[] dates = (Date[]) value;  
26.             obj = new String[dates.length];  
27.             for (int i = 0; i < dates.length; i++) {  
28.                 obj[i] = sf.format(dates[i]);  
29.             }  
30.         }  
31.         return obj;  
32.     }  
33.  
34.     @Override 
35.     public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {  
36.         if (value instanceof java.util.Date) {  
37.             String str = new SimpleDateFormat(format).format((Date) value);  
38.             return str;  
39.         }  
40.         return value.toString();  
41.     }  
42.  
43.     public String getFormat() {  
44.         return format;  
45.     }  
46.  
47.     public void setFormat(String format) {  
48.         this.format = format;  
49.     }  
50.  
51. } 

JSON格式化,详细介绍！

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原文地址：http://www.cnblogs.com/xjsmfw/p/4290985.html