processingでcsv, xml, jsonの読み込み比較

※漢字を含むため、読み込むファイルの文字コードはUTF-8にする必要があります。

CSVファイルの読み込み

student.csv

name,age
伊藤,20
衛藤,20
加藤,22
木藤,22
工藤,24
後藤,24

csv.pde

String name;
int age;

void setup() {
  csv = loadTable("student.csv","header");

  for (TableRow row: csv.rows()) {
    name = row.getString("name");
    age  = row.getInt("age");
    print(name);
    println(age);
  }
}

XMLファイルの読み込み

student.xml

<?xml version="1.0" encoding="UTF-8"?>
<students>
<student>
  <name>伊藤</name><age>20</age>
</student>
<student>
  <name>衛藤</name><age>20</age>
</student>
<student>
  <name>加藤</name><age>22</age>
</student>
<student>
  <name>木藤</name><age>22</age>
</student>
<student>
  <name>工藤</name><age>24</age>
</student>
<student>
  <name>後藤</name><age>24</age>
</student>
</students>

xml.pde

XML xml;
XML[] students, name, age;

void setup() {
  xml = loadXML("student.xml");
  //xml.print();
  students = xml.getChildren("student");
  for (int i = 0; i < students.length; i++) {
    name = students[i].getChildren("name");
    age  = students[i].getChildren("age");

    print( name[0].getContent());
    println(age[0].getContent());
  }
}

JSONファイルの読み込み

student.json

[
{
  "name":"伊藤",
  "age":20
},
{
  "name":"衛藤",
  "age":20
},
{
  "name":"加藤",
  "age":22
},
{
  "name":"木藤",
  "age":22
},
{
  "name":"工藤",
  "age":24
},
{
  "name":"後藤",
  "age":24
}
]

json.pde

JSONArray  students;
JSONObject student;
String name;
int age;

void setup() {
  students = loadJSONArray("student.json");
  for (int i = 0; i < students.size(); i++) {
    student = students.getJSONObject(i);
    name = student.getString("name");
    age  = student.getInt("age");
    print(name);
    println(age);
  }
}