Jackson used to convert an object into a string JSON

Because of the prevalence of ajax, used in the program to more and more json for data transmission, but may be a Jackson ordinary string into a java object json help of the data before and after transmission end programmers.

First, the program need to import dependent jar package, respectively jackson-annotations-2.8.5.jar and jackson-core-2.8.5.jar and jackson-databind-2.8.5.jar

package com.test;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 使用Jackson来将一个对象转换成一个json字符串
 * @author Administrator
 *
 */
public class Jackson
{
	private String id;
	
	private String name;

	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 String getAddress()
	{
		return "shanghai";
	}
	
	public String getDate()
	{
		return "2019-11-20";
	}
	
	public static void main(String[] args) throws Exception
	{   
		//1.创建ObjectMapper对象
		ObjectMapper mapper = new ObjectMapper();
		
		Jackson jk = new Jackson();
		jk.setId("2019");
		jk.setName("星期五");
		
		//2.调用mapper的writeValueAsString()方法将一个对象转换成一个json字符串
		String jsonStr = mapper.writeValueAsString(jk);
		
		System.out.println(jsonStr);
	}
	

}

In the process should pay attention to the use of Jackson, Jackson is using getter methods to locate the JSON object's properties. Meanwhile annotations can be used to ignore certain JsonIgnore a getter-defined attributes.

package com.test;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 使用Jackson来将一个对象转换成一个json字符串
 * @author Administrator
 *
 */
public class Jackson
{
	private String id;
	
	private String name;

	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 String getAddress()
	{
		return "shanghai";
	}
	
	/*public String getDate()
	{
		return "2019-11-20";
	}*/
	
	public static void main(String[] args) throws Exception
	{   
		//1.创建ObjectMapper对象
		ObjectMapper mapper = new ObjectMapper();
		
		Jackson jk = new Jackson();
		jk.setId("2019");
		jk.setName("星期五");
		
		//2.调用mapper的writeValueAsString()方法将一个对象转换成一个json字符串
		String jsonStr = mapper.writeValueAsString(jk);
		
		System.out.println(jsonStr);
	}
	

}

package com.test;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 使用Jackson来将一个对象转换成一个json字符串
 * @author Administrator
 *
 */
public class Jackson
{
	private String id;
	
	private String name;

	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;
	}
	
	@JsonIgnore
	public String getAddress()
	{
		return "shanghai";
	}
	
	public static void main(String[] args) throws Exception
	{   
		//1.创建ObjectMapper对象
		ObjectMapper mapper = new ObjectMapper();
		
		Jackson jk = new Jackson();
		jk.setId("2019");
		jk.setName("星期五");
		
		//2.调用mapper的writeValueAsString()方法将一个对象转换成一个json字符串
		String jsonStr = mapper.writeValueAsString(jk);
		
		System.out.println(jsonStr);
	}
	

}