{"id":1509,"date":"2015-01-15T08:00:51","date_gmt":"2015-01-15T07:00:51","guid":{"rendered":"http:\/\/liceocuneo.it\/oddenino\/?p=1509"},"modified":"2016-03-10T09:16:08","modified_gmt":"2016-03-10T08:16:08","slug":"istogramma","status":"publish","type":"post","link":"https:\/\/liceocuneo.it\/oddenino\/istogramma\/","title":{"rendered":"Istogramma"},"content":{"rendered":"

index.html<\/strong><\/p>\n

<!DOCTYPE html>\r\n<html>\r\n    <head>\r\n        <title>Istogramma<\/title>\r\n        <meta charset=\"UTF-8\">\r\n        <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n    <\/head>\r\n    <body>\r\n        <h1>Istogramma<\/h1>\r\n        <p>JSP<br \/><img src=\"istogramma.jsp?v=60&v=120&v=180&v=240&v=300&v=360\" \/><\/p>\r\n        <p>Servlet<br \/><img src=\"istogramma?v=60&v=120&v=180&v=240&v=300&v=360\" \/><\/p>\r\n    <\/body>\r\n<\/html><\/pre>\n
istogramma.jsp<\/strong><\/p>\n
<%@page import=\"javax.imageio.ImageIO\"%>\r\n<%@page import=\"java.io.OutputStream\"%>\r\n<%@page import=\"java.awt.Color\"%>\r\n<%@page import=\"java.awt.Graphics\"%>\r\n<%@page import=\"java.awt.image.BufferedImage\"%>\r\n<%@page contentType=\"image\/png\"%>\r\n<%  \/\/ legge i parametri\r\n    String[] v = request.getParameterValues(\"v\");\r\n    \/\/ crea l'immagine\r\n    BufferedImage img = new BufferedImage(600, 200, BufferedImage.TYPE_INT_RGB);\r\n    Graphics g = img.createGraphics();\r\n    g.setColor(Color.WHITE);\r\n    g.fillRect(0, 0, img.getWidth(), img.getHeight());\r\n    for (int i = 0; i < v.length; i++) {\r\n        int val = Integer.parseInt(v[i]);\r\n        g.setColor(Color.getHSBColor(val \/ 360.0f, 1, 1));\r\n        g.fill3DRect(0, i * 20, val, 16, true);\r\n        g.setColor(Color.BLACK);\r\n        g.drawString(\" \" + val, val, i * 20 + 13);\r\n    }\r\n    \/\/ invia l'immagine in output\r\n    OutputStream os = response.getOutputStream();\r\n    ImageIO.write(img, \"png\", os);\r\n    os.close();\r\n%><\/pre>\n
istogramma (servlet)<\/strong><\/p>\n
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {\r\n    response.setContentType(\"image\/png\");\r\n    try (OutputStream os = response.getOutputStream()) {\r\n        \/\/ legge i parametri\r\n        String[] v = request.getParameterValues(\"v\");\r\n        \/\/ crea l'immagine\r\n        BufferedImage img = new BufferedImage(600, 200, BufferedImage.TYPE_INT_RGB);\r\n        Graphics g = img.createGraphics();\r\n        \/\/ cancella lo sfondo\r\n        g.setColor(Color.WHITE);\r\n        g.fillRect(0, 0, img.getWidth(), img.getHeight());\r\n        \/\/ disegna l'istogramma\r\n        for (int i = 0; i < v.length; i++) {\r\n            int val = Integer.parseInt(v[i]);\r\n            g.setColor(Color.getHSBColor(val \/ 360.0f, 1, 1));\r\n            g.fill3DRect(0, i * 20, val, 16, true);\r\n            g.setColor(Color.BLACK);\r\n            g.drawString(\" \" + val, val, i * 20 + 13);\r\n        }\r\n        \/\/ invia l'immagine in output\r\n        ImageIO.write(img, \"png\", os);\r\n    }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
index.html <!DOCTYPE html> <html> <head> <title>Istogramma<\/title> <meta charset=”UTF-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <\/head> <body> <h1>Istogramma<\/h1> <p>JSP<br \/><img src=”istogramma.jsp?v=60&v=120&v=180&v=240&v=300&v=360″ \/><\/p> <p>Servlet<br \/><img src=”istogramma?v=60&v=120&v=180&v=240&v=300&v=360″ \/><\/p> <\/body> <\/html> istogramma.jsp <%@page import=”javax.imageio.ImageIO”%> <%@page import=”java.io.OutputStream”%> <%@page import=”java.awt.Color”%> <%@page import=”java.awt.Graphics”%> <%@page import=”java.awt.image.BufferedImage”%> <%@page contentType=”image\/png”%> <% \/\/ legge i parametri String[] v = request.getParameterValues(“v”); \/\/ crea l’immagine BufferedImage img = new BufferedImage(600, … Continua a leggere Istogramma<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1509","post","type-post","status-publish","format-standard","hentry","category-informatica"],"_links":{"self":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts\/1509","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/comments?post=1509"}],"version-history":[{"count":0,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/posts\/1509\/revisions"}],"wp:attachment":[{"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/media?parent=1509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/categories?post=1509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/liceocuneo.it\/oddenino\/wp-json\/wp\/v2\/tags?post=1509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}