JSON格式化,详细介绍！

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. JSONObject jsonFromBean = JSONObject.fromObject(testBean,jsonConfig);
5. System.out.println(jsonFromBean);
6. //prints {"birthday":"2009-10-26","id":"id","name":"name"}
7. String[] dateFormats = new String[] {"yyyy/MM/dd","yyyy-MM-dd"};
8. JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats));
9. TestBean jsonToBean = (TestBean)JSONObject.toBean(jsonFromBean,TestBean.class);
10. System.out.println(jsonToBean);
11. //prints [email protected][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 [email protected][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. import org.apache.commons.lang.builder.ReflectionToStringBuilder;
3. public class TestBean {
4. private String id;
5. private String name;
6. private java.util.Date birthday;
7. public TestBean() {
8. super();
9. }
10. public TestBean(String id, String name, Date birthday) {
11. super();
12. this.id = id;
13. this.name = name;
14. this.birthday = birthday;
15. }
16. public String getId() {
17. return id;
18. }
19. public void setId(String id) {
20. this.id = id;
21. }
22. public String getName() {
23. return name;
24. }
25. public void setName(String name) {
26. this.name = name;
27. }
28. public java.util.Date getBirthday() {
29. return birthday;
30. }
31. public void setBirthday(java.util.Date birthday) {
32. this.birthday = birthday;
33. }
34. public String toString() {
35. return ReflectionToStringBuilder.toString(this);
36. }
37. }

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