java连接neo4j

import java.sql.Connection;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import org.neo4j.jdbc.Driver;
//Class.forName("org.neo4j.jdbc.Driver");
//Connect

public class DBUtil {
Connection con;
Statement stmt;
ResultSet rs;
public ResultSet rs(String sqlstring) throws SQLException {

try {
Class.forName("org.neo4j.jdbc.Driver").newInstance();
this.con = DriverManager.getConnection("jdbc:neo4j:http://localhost:7474/","用户名","密码");
this.stmt = con.createStatement();
this.rs = stmt.executeQuery(sqlstring);
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

return rs;
}
public void close () {
if (this.rs != null) {
try {
this.rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}

if (this.stmt != null) {
try {
this.stmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}

if (this.con != null) {
try {
this.con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) throws SQLException {
// TODO Auto-generated method stub
DBUtil db=new DBUtil();
ResultSet rs=db.rs("match (n) return n limit 10");
while(rs.next())
{
String jsonstring=rs.getString("n");
System.out.println(jsonstring);
JsonObject jsonObject = (JsonObject) new JsonParser().parse(jsonstring);
System.out.println(jsonObject.get("ff"));
}
db.close();
}
}