Google Map Service Class

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Bo co thc tp nhn thc GVHD : Trnh Cng

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A. PHN I :Nu cm nhn ca bn than v vic c tham quan, tip cn vi mi trng

doanh nghip, c th l cng ty Enclave.

I. Gii thiu v cng ty Enclave :

Cng ty Cng ngh phn mm Enclave l mttrong nhng cng ty gia cng phn mm 100% vn nc ngoi ng trn a bn

Nng (27 Hunh Thc Khng- Nng).Cng ty hot ng hon ton vi cng vic giacng phn mm cho khch hng.

Cng ty Cng ngh phn mm Enclave l mt trong nhng cng ty gia cng phnmm 100% vn nc ngoi ng trn a bn Nng (27 Hunh Thc Khng-

Nng).Cng ty hot ng hon ton vi cng vic gia cng phn mm cho khch hng.

Cng ty thng dnh Cc mng hp tc, h tr cho sinh vin:- T chc cc bui seminar, workshop cho sinh vin v ging vin khoa o to Quct v CNTT- Trao hc bng hng nm.- Tuyn dng sinh vin thc tp v tuyn dng vic lm.- Gp trin khai chng trnh o to v cc hot ng lin quan khc.

II. Cm nhn ca bn thn :Khi tham quan mi trng doanh nghip, tht s em nhn ra c nhiu iu.u tin em nhn thy cng ty Enclave l mt cng ty vi i ng nhn vin tr,nng

ng v ti nng.- Cng ty Enclave c t chc kh cht ch ,chia thnh nhiu phng vi cc chc

nng, nhim v khc nhau .Mi phng thc hin cc d n khc nhau.- Lnh o cng ty l nhng ngi c kinh nghim,ti nng nhng khng thiu snhit tnh trong cng vic.

- i ng nhn vin tr,y ti nng ,nhit tnh c th m ng v hon thnh ttcng vic.c bit l h c nhng k nng mm tt : lm vic nhm,ngoi ng..

- Mi trng lm vic thn thin vi nn tng ngoai ng tt.


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Mi trng lm vic ti cng ty tht khc so vi s tng tng ca em.Mt mi trnglm vic m khng c vn ngoai ng tt th kh c th ha nhp tt.

Sau khi c tip cn v trao i vi anh ch l nhn vin ca cng ty,em hiu c

rng lm tt cng vic th mnh khng ch hiu su mt ngn ng lp trnh,mt vn m phi hiu nhiu iu hn nh ngoi ng , kh nng lm nhm,...c bit phi c sthch ng nhanh vi mi trng.

B. PHN II :I. M t ti :

ti 39 :Nghin cu gi cng ngh Google Map API xy dng ng dng bn trc tuyn s dng ngn ng JAVA.

II. Cs l thuyt :1. Gii thiu :

Google Maps (thi gian trc cn gi l Google Local) l mt dch v ng dng v cngngh bn trc tuyn trn web min ph c cung cp bi Google v h tr nhiu dchv da vo bn nh Google Ride Finder v mt s c th dng nhng vo cc trangweb ca bn th ba thng qua Google Maps API. N cho php thy bn ng s,ng i cho xe p, cho ngi i b (nhng ng i ngn hn 6.2 dm) v xe hi, v

nhng a im kinh doanh trong khu vc cng nh khp ni trn th gii.

III. Cng ngh :1. Google map API l g?

The Google Maps API cung cp cc dch v web nh 1 giao din yu cu d liuMaps API t 1 dch v bn ngoi(dch v ca Google) v s dng n bn trong nhngng dng bn ca chng ta(cc trang web). Cc dch v ny c thit k s dngtrong s lin kt vi bn .

Cc dch v web ny s dng giao thc HTTP yu cu n cc URL c th, truyn cctham s URL nh l truyn cc i s n dch v. Ni chung cc dch v ny tr v dliu trong yu cu HTTP nh JSON hay XML truyn v/hay x l bi ng dng cachng ta.

Ex : 1 kiu yu cu dch v web ni chung c cu trc nh sau:


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http://maps.googleapis.com/maps/api/service/output?parameters

Trong :Service : Ch nh c th dch v c yu cu.Output : Ch nh kiu nh dng tr v (XML hay JSON)

2. Truy cp SSL:Bn khng nhng c th truy cp dch v web Google API thng qua giao thc

HTTPS. Ta c th thay i giao thc trong yu cu URL ca bn thnh https nh sau:

https://maps.googleapis.com/maps/api/service/output?parameters

HTTPS c ch cho ng dng rng n cha d liu dng nhy cm ca ngi dng, nhv tr ngi dng trong yu cu.

S dng Google Map API by gi yu cu rng bn ch nh ng dng ca bn c sdng 1 cm bin (nh nh v GPS) xc nh v tr ca ngi dng trn bt k th vinMap API no hay cc yu cu dch v. y l iu c bit quan trng vi thit b ding. Nu ng dng Google Map API ca bn s dng bt k dng no ca cm bin xc nh v tr ca thit b ang truy cp ng dng ca bn. bn phi khai bo n vi 1 gitr true vi tham s ca cm bin.Ch rng thm ch nu ng dng ca bn khng sdng 1 cm bin nh v, bn vn phi thit lp tham s sensor.

3. Xy dng URL hp l :Chng ta cn dch cc k t c bit bi v tt c cc URL cn ph hp vi cu trc

ch nh bi c t W3 Uniform Resource Identifier. N c ngha l cc URL ch ccha tp con c bit ca cc k t ASCII, cc biu tng va c ch va c s quenthuc v mt s k t d tr cho dng nh cc k t iu khin bn trong cc URL.Bng sau tng hp cc k t :

Set Characters URL usageAlphanumeric a b c d e f g h i j k l m n o p q r s t u v w x y z A

B C D E F G H I J K L M N O P Q R S T U VW X Y Z 0 1 2 3 4 5 6 7 8 9

Text strings, scheme

usage (http), port (8080),etc.Unreserved - _ . ~ Text stringsReserved ! * ' ( ) ; : @ & = + $ , / ? % # [ ] Control characters and/or

Text Strings

Tt c cc k t c m ha URL c m ha s 1 k t '%'v 2 k t gi tr thp lcphn tng ng vi cc k t UTF-8 . V d, + trong UTF-8 c chuyn m


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thnh %E4%B8%8A%E6%B5%B7%2B%E4%B8%AD%E5%9C%8B . Chui ? and the Mysterianschuyn thnh %3F+and+the+Mysterians.

4. S xc thc u tin Map API :Yu cu n cc dch v web Map API bi ng dng by gi yu cu ch k in t s

dng 1 kha c m ha m Google cung cp cho bn cho mc ch . Ch k x lkt hp 1 URL v kha ch k vi nhau s dng 1 thut ton m ha,to 1 ch k duynht. Ch k duy nht ny cho php sch v web ca chng ta xc thc rng bt c trangno sinh ra yu cu m s dng ID khch Map API ca bn c xc thc lm iu. Ch k khng nhng duy nht cho mi URL, m bo rng cc yu cu s dng IDkhch khng th c chnh sa m khng yu cu 1 ch k mi c to ra.

5. X l phn hi :Khi nh dng chnh xc ca cu tr li ring l vi mt yu cu dch v web l khngc bo m (mt s yu t c th b mt hay nhiu a im), bn khng nn gi nhrng cc nh dng c tr v cho bt k phn ng nht nh s l tng t cho cc truyvn khc nhau. Thay vo , bn nn x l cc phn ng v chn gi tr thch hp thngqua cc biu thc. Phn ny bn v lm th no trch xut cc gi tr t ng ng phvi dch v web.

Cc dch v Web ca Google cung cp cu tr li l d hiu, nhng khng hon ton thnthin ngi dng. Khi thc hin mt truy vn, thay v hin th mt tp hp cc d liu,

bn c th mun trch xut mt vi gi tr c th. Ni chung, bn s mun phn tch phnhi t cc dch v web v gii nn ch nhng gi tr m bn quan tm.

n phn tch c php m bn s dng ph thuc vo liu bn c tr v u ra l XMLhoc JSON. Phc p JSON, l c trong hnh thc ca cc i tng Javascript, c thc x l trong vng Javascript chnh n trn my khch, phc p XML phi c x

l bng cch s dng mt b x l XML v mt ngn ng truy vn XML gii quytcc yu t trong nh dng XML. Chng ti s dng XPath trong cc v d sau y, v nthng c h tr trong cc th vin x l XML.

IV. Cch xy dng chng trnh :


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1. nh hng :- Trc tin ta phi xy dng 2 gi h tr cho ng dng l :

+ Gi org.netbeans.saas : cha cc lp lm nhim v nh ngha cc kt nivi GooglemapServer trong lpRestConnection v nh ngha cch x l cc phc pt GooglemapServer trong lpRestResponse.

+ Gi org.netbeans.saas.google: cha lp GoogleMapService thc hinkt ni ti GooglemapServer, gi yu cu v nhn phc p t GooglemapServer.V 1

propertygooglemapservice cha API_KEY do Google cung cp.

- Tip theo ta to 1 file JSP hin th d liu do Google map API phc p lntrang web trc tuyn.

2. Thc thi :a. Xy dng gi org.netbeans.saas :+ To lpRestConnection:

package org.netbeans.saas;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

import java.net.Authenticator;

import java.net.HttpURLConnection;


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import java.net.URL;

import java.net.URLEncoder;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.logging.Level;

import java.util.logging.Logger;

public class RestConnection {

static {

//set the identification of the client

System.setProperty("http.agent", System.getProperty("user.name") + " (from

NetBeans IDE)");

}

private HttpURLConnection conn;

private String date;

/** Creates a new instance of RestConnection */

public RestConnection(String baseUrl) {

this(baseUrl, null, null);

}


public RestConnection(String baseUrl, String[][] params) {

this(baseUrl, null, params);

}



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public RestConnection(String baseUrl, String[][] pathParams, String[][] params) {

try {

String urlStr = baseUrl;

if (pathParams != null && pathParams.length > 0) {

urlStr = replaceTemplateParameters(baseUrl, pathParams);

}

URL url = new URL(encodeUrl(urlStr, params));

conn = (HttpURLConnection) url.openConnection();

conn.setDoInput(true);

conn.setDoOutput(true);

conn.setUseCaches(false);

conn.setDefaultUseCaches(false);

conn.setAllowUserInteraction(true);

SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy

HH:mm:ss z");

date = format.format(new Date());

conn.setRequestProperty("Date", date);

} catch (Exception ex) {

Logger.getLogger(RestConnection.class.getName()).log(Level.SEVERE, null, ex);

}

}

public void setAuthenticator(Authenticator authenticator) {

Authenticator.setDefault(authenticator);

}


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public String getDate() {

return date;

}

public RestResponse get() throws IOException {

return get(null);

}

public RestResponse get(String[][] headers) throws IOException {

conn.setRequestMethod("GET");

return connect(headers, null);

}

public RestResponse head() throws IOException {

return get(null);

}

public RestResponse head(String[][] headers) throws IOException {

conn.setRequestMethod("HEAD");


}

public RestResponse put(String[][] headers) throws IOException {

return put(headers, (InputStream) null);

}

public RestResponse put(String[][] headers, String data) throws IOException {

InputStream is = null;

if(data != null)


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is = new ByteArrayInputStream(data.getBytes("UTF-8"));

return put(headers, is);

}

public RestResponse put(String[][] headers, InputStream is) throws IOException {

conn.setRequestMethod("PUT");

return connect(headers, is);

}

public RestResponse post(String[][] headers) throws IOException {

return post(headers, (InputStream) null);

}

public RestResponse post(String[][] headers, String data) throws IOException {

InputStream is = null;

if(data != null)

is = new ByteArrayInputStream(data.getBytes("UTF-8"));

return post(headers, is);

}

public RestResponse post(String[][] headers, InputStream is) throws IOException {

conn.setRequestMethod("POST");

return connect(headers, is);

}

public RestResponse post(String[][] headers, String[][] params) throws IOException {

conn.setRequestMethod("POST");

conn.setRequestProperty("ContentType", "application/x-www-form-urlencoded");


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String data = encodeParams(params);

return connect(headers, new ByteArrayInputStream(data.getBytes("UTF-8")));

}

public RestResponse delete(String[][] headers) throws IOException {

conn.setRequestMethod("DELETE");


private RestResponse connect(String[][] headers,

InputStream data) throws IOException {

try {

// Send data

setHeaders(headers);

String method = conn.getRequestMethod();

byte[] buffer = new byte[1024];

int count = 0;

if (method.equals("PUT") || method.equals("POST")) {

if (data != null) {

conn.setDoOutput(true);

OutputStream os = conn.getOutputStream();

while ((count = data.read(buffer)) != -1) {


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os.write(buffer, 0, count);

}

os.flush();

}

}

RestResponse response = new RestResponse();

InputStream is = conn.getInputStream();

while ((count = is.read(buffer)) != -1) {

response.write(buffer, 0, count);

}

response.setResponseCode(conn.getResponseCode());

response.setResponseMessage(conn.getResponseMessage());

response.setContentType(conn.getContentType());

response.setContentEncoding(conn.getContentEncoding());

response.setLastModified(conn.getLastModified());

return response;

} catch (Exception e) {

String errMsg = "Cannot connect to :" + conn.getURL();

try {

BufferedReader rd = new BufferedReader(new

InputStreamReader(conn.getErrorStream()));

String line;

StringBuffer buf = new StringBuffer();


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while ((line = rd.readLine()) != null) {

buf.append(line);

buf.append('\n');

}

errMsg = buf.toString();

} finally {

throw new IOException(errMsg);

}

}

}

private String replaceTemplateParameters(String baseUrl, String[][] pathParams) {

String url = baseUrl;

if (pathParams != null) {

for (int i = 0; i < pathParams.length; i++) {

String key = pathParams[i][0];

String value = pathParams[i][1];

if (value == null) {

value = "";

}

url = url.replace(key, value);

}

}

return url;


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}

private String encodeUrl(String baseUrl, String[][] params) {

String encodedParams = encodeParams(params);

if (encodedParams.length() > 0) {

encodedParams = "?"+ encodedParams;

}

return baseUrl + encodedParams;

}

private String encodeParams(String[][] params) {

String p = "";

if (params != null) {

for (int i = 0; i < params.length; i++) {

String key = params[i][0];

String value = params[i][1];

if (value != null) {

try {

p += key + "=" + URLEncoder.encode(value, "UTF-8") + "&";

} catch (UnsupportedEncodingException ex) {

Logger.getLogger(RestConnection.class.getName()).log(Level.SEVERE, null,

ex);

}

}


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}

if (p.length() > 0) {

p = p.substring(0, p.length() - 1);

}

}

return p;

}

private void setHeaders(String[][] headers) {

if (headers != null) {

for (int i = 0; i < headers.length; i++) {

conn.setRequestProperty(headers[i][0], headers[i][1]);

}

}

}

}

+ To lpRestResponse:

package org.netbeans.saas;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;


import java.io.OutputStream;


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import java.io.StringReader;



import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBElement;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Unmarshaller;

import javax.xml.transform.stream.StreamSource;

public class RestResponse {

private ByteArrayOutputStream os;

private String contentType = "text/plain";

private String contentEncoding;

private int responseCode;

private String responseMsg;

private long lastModified;

public RestResponse() {

os = new ByteArrayOutputStream();

}

public RestResponse(byte[] bytes) throws IOException {

this();

byte[] buffer = new byte[1024];


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int count = 0;

ByteArrayInputStream bis = new ByteArrayInputStream(bytes);

while ((count = bis.read(buffer)) != -1) {

write(buffer, 0, count);

}

}

public void setContentType(String contentType) {

this.contentType = contentType;

}

public String getContentType() {

return contentType;

}

public void setContentEncoding(String contentEncoding) {

this.contentEncoding = contentEncoding;

}

public void setResponseMessage(String msg) {

this.responseMsg = msg;

}

public String getResponseMessage() {

return responseMsg;

}

public void setResponseCode(int code) {

this.responseCode = code;


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}

public int getResponseCode() {

return responseCode;

}

public void setLastModified(long lastModified) {

this.lastModified = lastModified;

}

public long getLastModified() {

return lastModified;

}

public void write(byte[] bytes, int start, int length) {

os.write(bytes, start, length);

}

public byte[] getDataAsByteArray() {

return os.toByteArray();

}

public String getDataAsString() {

try {

return os.toString("UTF-8");


Logger.getLogger(RestConnection.class.getName()).log(Level.SEVERE, null, ex);

}

return null;


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}

public OutputStream getOutputStream() {

return os;

}

public T getDataAsObject(Class jaxbClass) throws JAXBException {

return getDataAsObject(jaxbClass, jaxbClass.getPackage().getName());

}

public T getDataAsObject(Class clazz, String packageName) throws

JAXBException {

JAXBContext jc = JAXBContext.newInstance(packageName);

Unmarshaller u = jc.createUnmarshaller();

Object obj = u.unmarshal(new StreamSource(new StringReader(getDataAsString())));

if (obj instanceof JAXBElement) {

return (T) ((JAXBElement) obj).getValue();

} else {

return (T) obj;

}

}

}

b. Xy dng gi org.netbeans.saas.google:+ To lpGoogleMapService:

package org.netbeans.saas.google;


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import java.net.URLEncoder;

import java.util.Properties;



import org.netbeans.saas.RestConnection;

import org.netbeans.saas.RestResponse;

public class GoogleMapService {

private static String apiKey;

private static final String PROP_FILE =

GoogleMapService.class.getSimpleName().toLowerCase() + ".properties";

static {

try {

Properties props = new Properties();

props.load(GoogleMapService.class.getResourceAsStream(PROP_FILE));

apiKey = props.getProperty("api_key");

} catch (IOException ex) {

Logger.getLogger(GoogleMapService.class.getName()).log(Level.SEVERE, null, ex);

}

}

public static String getApiKey() throws IOException {

if (apiKey == null || apiKey.length() == 0) {


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throw new IOException("Please specify your api key in the " + PROP_FILE + "

file.");

}

return apiKey;

}

public static RestResponse getGoogleMap(String address, Integer zoom, String iframe)

throws IOException {

try {

String key = getApiKey();

String encoded = URLEncoder.encode(address, "UTF-8");

GeoCoder coder = new GeoCoder(encoded, apiKey);

GeoCode code = coder.invoke();

String mapRep = "";

if(iframe != null && iframe.trim().equalsIgnoreCase("true")) {

mapRep +=

" \n"+

getMapScript(address, zoom, code.getLatitude(), code.getLongitude(), key)+

" \n"+

" loadScript();\n"+

" \n";

} else {

mapRep =

"\n"+


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"\n"+

" \n"+

" \n"+

" Google Maps JavaScript API Example\n"+

getMapScript(address, zoom, code.getLatitude(), code.getLongitude(), key)+

" \n"+

" \n"+

" \n"+

" \n"+

"";

}

return new RestResponse(mapRep.getBytes());


throw new IOException(ex.getMessage());

}

}

public static String getMapScript(String address, Integer zoom,

double latitude, double longitude, String key) {

String mapRep =

" \n"+

" //


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" if (GBrowserIsCompatible()) {\n"+

" var map = new GMap2(document.getElementById('map'));\n"+

" var point = new GLatLng("+latitude+", "+longitude+");\n"+

" map.addControl(new GSmallMapControl());\n"+

" map.addControl(new GMapTypeControl());\n"+

" map.setCenter(point, " + zoom + ");\n"+

" var marker = createMarker(point);\n"+

" map.addOverlay(marker);\n"+

" marker.openInfoWindowHtml(\"" + address + "\");\n"+

" }\n"+

" }\n"+

" function createMarker(point) {\n" +

" var marker = new GMarker(point);\n"+

" GEvent.addListener(marker, \"click\", function() {\n"+

" marker.openInfoWindowHtml(\"" + address + "\");\n"+

" });\n"+

" return marker;\n"+

" }\n"+

" function loadScript() {\n"+

" var script = document.createElement(\"script\");\n"+

" script.setAttribute(\"src\",

\"http://maps.google.com/maps?file=api&v=2.x&key="+key+"&async=2&callback=loadM

ap\");\n"+

" script.setAttribute(\"type\", \"text/javascript\");\n"+


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" document.documentElement.firstChild.appendChild(script);\n"+

" }\n"+

" //]]>\n"+

" \n";

return mapRep;

}

public static class GeoCoder {

public final static String GEOCODE_URL = "http://maps.google.com/maps/geo";

private String location;

private String key;

/** Creates a new instance of GeoCoder */

public GeoCoder(String location, String key) {

this.location = location;

this.key = key;

}

public GeoCode invoke() throws IOException {

String[][] params = new String[][] {

{"q", location},

{"output", "xml"},

{"key", key}

};

RestConnection cl = new RestConnection(GEOCODE_URL, params);


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RestResponse response = cl.get();

String codeStr = response.getDataAsString();

return new GeoCode(codeStr);

}

}

public static class GeoCode {

private double longitude ;

private double latitude;

/** Creates a new instance of GeoCode */

public GeoCode(String xmlStr) {

int ts = xmlStr.indexOf("");

int te = xmlStr.indexOf("");

String codeStr = "";

if(ts != -1 && te != -1)

codeStr = xmlStr.substring(ts+13, te);

String[] codes = codeStr.split(",");

if(codes.length>1) {

this.longitude = Double.parseDouble(codes[0]);

this.latitude = Double.parseDouble(codes[1]);

}

}

public double getLongitude() {


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return this.longitude;

}

public double getLatitude() {

return this.latitude;

}

}

}

+ To propertygooglemapservice:

c. To file index.jsp :

View the Googlemap Demo

Google map API service!

Address:


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V. ng dng minh ha :


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VI.

Ph lc tham kho :Googlemapservice class:

http://code.google.com/p/tripnetworkingsite/source/browse/trunk/AwesomeTrips/src/java/org/netbeans/saas/google/GoogleMapService.java?r=39

RestConnection class:

http://49ers.es/welcomehome/javadoc/org/netbeans/saas/RestConnection.html

http://code.google.com/p/personalcloudsyncfr/source/browse/DocumentWatcher/src/org/netbeans/saas/RestConnection.java?r=295

RestResponse class:http://49ers.es/welcomehome/javadoc/org/netbeans/saas/RestResponse.html

http://code.google.com/p/tripnetworkingsite/source/browse/trunk/AwesomeTrips/src/java/org/netbeans/saas/RestResponse.java?r=39

api_key: ABQIAAAAT-3oDobl9bEVE3K2BOBXEBQg2HBMA_uLzZJtX4XkuiGzyMfk8BSm5ir6AShkWVFZIr21ZfDsiTR6Pg

Date post:	06-Apr-2018
Category:	Documents
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Google Map Service Class

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