一、Json的语法规则

        数据在名称/值中

        数据由逗号分隔

        大括号保存对象

        中括号保存数组

名称/值对包括字段名称(在双引号中),后面写一个冒号，然后是值

二、Json对象

        Json对象在大括号{}中书写，例：

        {"name":"硕硕"，"age":"16"}

三、Json数组

Json数组在中括号中书写：

        {"Person":[

                         {"name":"硕硕"，"age":"16"},

                         {"name":"二硕"，"sex":"女"},

                         {"name":"二硕"，"sex":"女"}

        ]}

      在上面的例子中,对象Person是包含三个对象的数组。

四、Json.parse()

        使用Json.parse()方法将数据转换为JavaScript对象。  

五、Json.stringify()

        使用Json.stringify()方法将JavaScript对象转为字符串

六、手动拼接Json串

        String a="{"+"\""+"email"+"\""+":"+"\""+email+"\""+","
				+ ""+"\""+"nick_name"+"\""+":"+"\""+name+"\""+"}";

        {"email":"1","nick_name":"ze"}

七、将java对象转成Json对象

        一个Customer对象和Result对象

   public class Customer {
	
	private String nick_name;
	private String email;
	

	public String getNick_name() {
		return nick_name;
	}

	public void setNick_name(String nick_name) {
		this.nick_name = nick_name;
	}
	
	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	@Override
	public String toString() {
		return "Customer [nick_name=" + nick_name + ", email=" + email + ", getEmail()=" + getEmail() + ","
				+ " getNick_name()=" + getNick_name() + ", getClass()=" + getClass() + ", hashCode()=" + 
				hashCode() + ", toString()=" + super.toString() + "]";
	}
	

public class Result {
	private Customer customer;

	public Customer getCustomer() {
		return customer;
	}

	public void setCustomer(Customer customer) {
		this.customer = customer;
	}
	
}

Result result=new Result();
		Customer cu=new Customer();
		cu.setEmail("[email protected]");
		cu.setNick_name("王鹏");
		result.setCustomer(cu);
		net.sf.json.JSONObject fromObject = net.sf.json.JSONObject.fromObject(result); //json-lib   将对象转为json
		System.out.println(fromObject);
		
		String str = JSON.toJSONString(result);//fastjson   将对象转为json字符串  {"customer":{"email":"[email protected]","nick_name":"王鹏"}} {对象里面套对象}

System.out.println(str);