Java 調用Oralce EBS RESTful接口服務實例

      最近項目開發許多Oracle EBS RESTful服務，其他項目組朋友需要用Java調用該服務，不知如何調用? 記得在某項目上,使用Java調用測試Oracle EBS RESTful服務簡單的實例如下:
一、獲得RESTfull服務連接:
Path:集成信息庫->Applications Technology->User Management->用戶
找到接口列表:用戶 ->名稱爲User，內部名稱爲FND_USER_PKG，如下圖：

點擊"User"->REST Web服務->查看WADL

該XML內容與Java 的JSON內容比較如下：

二、編寫Java程序調用Oracle EBS RESTful
2.1 Maven POM加載相關包

<dependency>
	<groupId>com.sun.jersey</groupId>
	<artifactId>jersey-bundle</artifactId>
	<version>1.19.4</version>
</dependency>
<dependency>
	<groupId>org.codehaus.jackson</groupId>
	<artifactId>jackson-mapper-asl</artifactId>
	<version>1.1.0</version>
</dependency>

2.2 創建類：oracleRestInovk

package com.cxp;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import com.sun.jersey.core.util.Base64;

public class oracleRestInovk {
	private static final String soapJson = "{\"TESTUSERNAME_Input\":{ "
			+ "   \"@xmlns\":\"http://xmlns.oracle.com/apps/fnd/soaprovider/plsql/rest/FND_USER_PKG/\","
			+ "   \"RESTHeader\":{ "
			+ "     \"@xmlns\":\"http://xmlns.oracle.com/apps/fnd/soaprovider/plsql/rest/FND_USER_PKG/\","
			+ "     \"Responsibility\":\"SCUX_INTERFACE_SUPERUSER\"," + "     \"RespApplication\":\"SCUX\","
			+ "     \"SecurityGroup\":\"STANDARD\"," + "     \"NLSLanguage\":\"AMERICAN\"," + "     \"Org_Id\":\"\" "
			+ "   }, " + "   \"InputParameters\":{ " + "     \"X_USER_NAME\":\"SYSADMIN\" " + "   }" + "}}";

	/**
	 * 該方法使用由AOL登錄服務返回的accessTokenName和accessToken值調用RESTfull服務
	 */
	public static void callRestfulApi(String restUrl, String tokenName, String tokenValue) throws IOException {
		URL url = new URL(restUrl);
		// 獲取連接調用服務
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		// 設置 Http 請求方法
		conn.setRequestMethod("POST");
		// 設置 Http 頭值
		conn.setRequestProperty("Content-Type", "application/json");
		// Adding the accessTokenName and accessToken as Cookies
		conn.addRequestProperty("Cookie", tokenName + "=" + tokenValue);
		conn.setRequestProperty("Accept", "application/json");
		conn.setRequestProperty("Content-Language", "en-US");
		conn.setUseCaches(false);
		conn.setDoInput(true);
		conn.setDoOutput(true);
		// 發送請求
		OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
		System.out.println("soapJson:" + soapJson);
		wr.write(soapJson.toCharArray());
		wr.flush();
		wr.close();
		conn.connect();
		System.out.println("Response code - " + conn.getResponseCode());
		// 獲得請求響應
		String response = null;
		try {
			response = readHttpResponse(conn);
		} finally {
			if (conn != null)
				conn.disconnect();
		}
		// 輸出響應內容
		System.out.println("Response is : \n" + response);
	}

	/**
	 * 獲取Access Token
	 */
	@SuppressWarnings("deprecation")
	private static String[] getAccesToken(String baseUrl, String username, String passwd) throws Exception {
		String rfUrl = baseUrl + "/login";
		URL url = new URL(rfUrl);
		// 獲取連接調用服務
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		String auth = username + ":" + passwd;
		byte[] bytes = Base64.encode(auth);
		String authorization = new String(bytes);
		// 設置 Http 請求方法
		conn.setRequestMethod("POST");
		// 設置 Http 頭相關值
		conn.setRequestProperty("Authorization", "Basic " + authorization);
		conn.setRequestProperty("Content-type", "application/json");
		conn.setRequestProperty("Accept", "application/json");
		conn.setUseCaches(false);
		conn.setDoInput(true);
		conn.setDoOutput(true);
		conn.connect();
		String response = null;
		// 獲得請求響應
		try {
			response = readHttpResponse(conn);
		} finally {
			if (conn != null)
				conn.disconnect();
		}
		System.out.println("response:" + response);
		// 解析響應
		JsonParser jp = null;
		JsonNode root = null;
		ObjectMapper mapper = new ObjectMapper();
		try {
			jp = mapper.getJsonFactory().createJsonParser(new ByteArrayInputStream(response.getBytes()));
			jp.disableFeature(org.codehaus.jackson.JsonParser.Feature.AUTO_CLOSE_SOURCE);
			root = jp.readValueAsTree();
		} catch (JsonParseException jpe) {
			jpe.printStackTrace();
		} catch (IOException ioe) {
			ioe.printStackTrace();
		}
		JsonNode dataNode = root.get("data");
		JsonNode accessTokenNode = dataNode.get("accessToken");
		String accessToken = accessTokenNode.getTextValue();
		JsonNode accessTokenNameNode = dataNode.get("accessTokenName");
		String accessTokenName = accessTokenNameNode.getTextValue();
		return (new String[] { accessTokenName, accessToken });
	}

	/**
	 * 該方法讀取服務器發送的響應並以字符串表示形式返回。
	 */
	private static String readHttpResponse(HttpURLConnection conn) {
		InputStream is = null;
		BufferedReader rd = null;
		StringBuffer response = new StringBuffer();
		try {
			if (conn.getResponseCode() >= 400) {
				is = conn.getErrorStream();
			} else {
				is = conn.getInputStream();
			}
			rd = new BufferedReader(new InputStreamReader(is));
			String line;
			while ((line = rd.readLine()) != null) {
				response.append(line);
				response.append('\n');
			}
		} catch (IOException ioe) {
			response.append(ioe.getMessage());
		} finally {
			if (is != null) {
				try {
					is.close();
				} catch (Exception e) {
				}
			}
			if (rd != null) {
				try {
					rd.close();
				} catch (Exception e) {
				}
			}
		}
		return (response.toString());
	}

	public static void main(String[] args) throws Exception {
		String baseUrl = "http://<hostname>:<port>/webservices/rest";
		String restUrl = baseUrl + "/FND_USER/testusername/";
		System.out.println(restUrl);
		// 調用AOL登陸服務獲得 Access Token
		String[] token = getAccesToken(baseUrl, "<EBS User Name>", "<password>");
		// 輸出Access Token名稱和值
		System.out.println("AOL Token : Name - " + token[0] + ", Value - " + token[1]);
		// 使用Access Token調用RESTful服務
		callRestfulApi(restUrl, token[0], token[1]);
	}
}

由於涉及敏感信息，參考者需求對以上代碼修改如下：

其它問題：注意<EBS User Name>必須要用調用RESTful服務的權限。
執行輸出結果如下：