In this example I’ll use the same file which we have generated in previous tutorial.
Maven Dependency:
|
1
2
3
4
5
|
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
|
Previous Tutorial: http://crunchify.com/how-to-write-json-object-to-file-in-java/
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
package com.crunchify.tutorials;
import java.io.FileReader;
import java.util.Iterator;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
/**
* @author Crunchify.com
*/
public class CrunchifyJSONReadFromFile {
@SuppressWarnings("unchecked")
public static void main(String[] args) {
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader(
"/Users/<username>/Documents/file1.txt"));
JSONObject jsonObject = (JSONObject) obj;
String name = (String) jsonObject.get("Name");
String author = (String) jsonObject.get("Author");
JSONArray companyList = (JSONArray) jsonObject.get("Company List");
System.out.println("Name: " + name);
System.out.println("Author: " + author);
System.out.println("\nCompany List:");
Iterator<String> iterator = companyList.iterator();
while (iterator.hasNext()) {
System.out.println(iterator.next());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
|
Other must read: Create and Deploy simple Web Service and Web Service Client in Eclipse
Output:
|
1
2
3
4
5
6
7
|
Name: Crunchify.com
Author: App Shah
Company List:
Compnay: eBay
Compnay: Paypal
Compnay: Google
|
Download json-simple-1.1.1.jar
If you enjoyed this post, make sure to subscribe to Crunchify's RSS feed.
http://crunchify.com/how-to-read-json-object-from-file-in-java/
請先 登入 以發表留言。