我想从java应用程序（软件）上传txt文件到restful web-service，因为在txt文件中我有要执行的sql查询列表。所以，我想首先将文件上传到web服务，然后逐行执行查询到数据库。
我将txt文件转换为List对象，然后再转换为字符串并传递给它，但无法获得成功。
以下是Webservice代码
package com.java.webservice;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.api.client.WebResource;
@Path("UploadFile")
public class UploadFile {
private List<String> storedQueries = new ArrayList<String>();
private Connection conn = null;
// private PreparedStatement pstm = null;
private Statement pstm = null;
private ResultSet rs = null;
private String q = "";
// @GET here defines, this method will method will process HTTP GET
// requests.
@GET
// @Path here defines method level path. Identifies the URI path that a
// resource class method will serve requests for.
@Path("/getTest")
// @Produces here defines the media type(s) that the methods
// of a resource class can produce.
@Produces(MediaType.APPLICATION_JSON)
// @PathParam injects the value of URI parameter that defined in @Path
// expression, into the method.
public Response getTest(@QueryParam("name") String name) {
// String name = "Lokendra Pun ,Java Engineer";
System.out.println("Your Name IS: " + name);
java.util.StringTokenizer st = new java.util.StringTokenizer(name, ",");
java.util.ArrayList newArrayList = new java.util.ArrayList();
while (st.hasMoreTokens()) {
// the trim() below may not always be desired or necessary
newArrayList.add(st.nextToken().trim());
}
// this if statement only necessary because a String created from
// ArrayList.toString() ends up as "[1, 2, 3, 4]" not, "1, 2, 3, 4"
if (newArrayList.size() == 1) {
// remove [] around item
int length = ((String) newArrayList.get(0)).length();
newArrayList.set(0, ((String) newArrayList.get(0)).substring(1, length - 1));
} else if (newArrayList.size() > 1) {
// remove '[' in first item and ']' in last
int lastIndex = newArrayList.size() - 1;
String oldString = (String) newArrayList.get(0);
String newString = oldString.substring(1, oldString.length());
newArrayList.set(0, newString);
oldString = (String) newArrayList.get(lastIndex);
newString = oldString.substring(0, oldString.length() - 1);
newArrayList.set(newArrayList.size() - 1, newString);
}
System.out.println("newArrayList->" + newArrayList.toString());
System.out.println("==================");
for (int i = 0; i < newArrayList.size(); i++) {
System.out.println("Name" + i + " :" + newArrayList.get(i));
}
System.out.println("==================");
return Response.status(200).entity(name).build();
}
/**
*
*
* method to get file name from remote server and process query into
* database
*
*
*
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
@Path("/getUploadQuery")
public Response getUploadQuery(@QueryParam("file_name") String file_name,
@QueryParam("database_name") String database_name) {
System.out.println("I am inside getTeacher Method");
String list = null;
try {
conn = getConnection(database_name);
if (conn != null) {
try {
for (String line : Files.readAllLines(Paths.get(file_name))) {
storedQueries.add(line);
System.out.println(line);
}
for (int i = 0; i < storedQueries.size(); i++) {
System.out.println("Looping Query Length is: " + storedQueries.size());
System.out.println("Connection Object Inside Loop : " + conn);
pstm = conn.createStatement();
System.out.println("Looping Size now : " + i);
if (!storedQueries.get(i).equals("")) {
System.out.println("Query Before Executed is: " + storedQueries.get(i));
// pstm =
// conn.prepareStatement(storedQueries.get(i));
// pstm.executeUpdate();
pstm.addBatch(storedQueries.get(i));
pstm.executeBatch();
}
}
pstm.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
list = "true";
} else {
list = "false";
}
} catch (Exception e) {
e.printStackTrace();
}
return Response.status(200).entity(list).build();
}
/**
*
* method to connect to remote server database according to db and school
* name
*
* @param database_name
* @return
*/
public Connection getConnection(String database_name) {
System.out.println("Database Name before Connection: " + database_name);
try {
Class.forName("com.mysql.jdbc.Driver");
// Setup the connection with the DB
conn = DriverManager.getConnection(
"jdbc:mysql://localhost/" + database_name + "?" + "user=root&password=java@android2016");
System.out.println(conn);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
}
以下是从java应用程序调用服务的代码
package WSserviceCall;
import javax.ws.rs.core.MediaType;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
public class TestMain {
public static final String BASE_URI = "http://localhost:8080/MovieGalaxyService";
public static final String PATH_TEST = "/UploadFile/getTest";
public static final String PATH_LOAD_FILE = "/UploadFile/getUploadQuery";
public static final String PATH_AGE = "/UploadFile/age/";
public static void main(String[] args) {
try {
// TODO Auto-generated method stub
List<String> storedQueries = new ArrayList<String>();
String currentDirectory = System.getProperty("user.dir");
String file_name = currentDirectory + "/databaseBackupScript.txt";
String name = "Lokendra Pun Param";
String age ="26";
try{
for (String line : Files.readAllLines(Paths.get(file_name))) {
storedQueries.add(line);
System.out.println(line);
}
}catch(Exception e){
e.printStackTrace();
}
// String names = ""+aa;
//System.out.println("Array Objec is: "+aa);
//System.out.println("String Objects is: "+aa.toString());
ClientConfig config = new DefaultClientConfig();
Client client = Client.create(config);
WebResource resource = client.resource(BASE_URI);
String param = storedQueries.toString();
String temp_uri = URLEncoder.encode(param, "UTF-8");
WebResource testResource = resource.path(PATH_TEST).
queryParam("name",temp_uri);
//WebResource testResource = resource.path(PATH_TEST);
// System.out.println("Client Response \n"
// + getClientResponse(testResource));
// System.out.println("Response \n" + getResponse(testResource) + "\n\n");
String testValue = getResponse(testResource);
System.out.println("Test Resource Value is : "+testValue);
} catch (UnsupportedEncodingException ex) {
Logger.getLogger(TestMain.class.getName()).log(Level.SEVERE, null, ex);
}
}
/**
* Returns client response.
* e.g :
* GET http://localhost:8080/RESTfulWS/rest/UserInfoService/name/Pavithra
* returned a response status of 200 OK
*
* @param service
* @return
*/
private static String getClientResponse(WebResource resource) {
return resource.accept(MediaType.APPLICATION_JSON).get(ClientResponse.class).toString();
}
/**
* Returns the response as JSON data
* e.g : status : true or false
*
* @param service
* @return
*/
private static String getResponse(WebResource resource) {
return resource.accept(MediaType.APPLICATION_JSON).get(String.class);
}
}