Mixing
How can i call a parametrized method of java class into a servlet doget method
I have a java class where i have a method which is returning me a json i want to call that method into my servlet doGet method so that i can make a AJAX call later
but while calling the java class method (Outlet.Outlet) it asks for a parameter to pass i dont know what to pass there
please have a look into my code
this is my java class
public class Outlet {
static Connection con = null;
static Statement statement = null;
ResultSet resultSet = null;
public static String Outlet(String idDB) throws ClassNotFoundException, SQLException {
List<String> list = new ArrayList<String>();
con = DBConnection.createConnection();
statement = con.createStatement();
String sql="select CUSTOMERDESCRIPTOR as OUTLETNAME from ecustomer where CUSTOMERIDENTIFIER in(select CUSTOMERIDENTIFIER from mt_distributrol where mt_distributr_vcdistributrcode = '"+idDB+"')";
System.out.println("iddb :"+idDB);
try {
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
list.add(resultSet.getString("OUTLETNAME"));
}
} catch (SQLException e) {
e.printStackTrace();
}
String json = new Gson().toJson(list);
System.out.println("Json Outlet :"+json);
return json;
}
}
In the above java class i am returning a Json and i want to call that method into my servlet doGost
my doGet is
try {
String json = Outlet.Outlet(); //what should i pass here as a parameter
response.setContentType("application/json");
response.getWriter().write(json);
System.out.println("dheeraj"+json);
}
catch (Exception e) {
e.printStackTrace();
}
}
if i am passing idDB then it throws error.please anybody having any knowledge help me out
java sql servlets jdbc methods
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
|
show 6 more comments
I have a java class where i have a method which is returning me a json i want to call that method into my servlet doGet method so that i can make a AJAX call later
but while calling the java class method (Outlet.Outlet) it asks for a parameter to pass i dont know what to pass there
please have a look into my code
this is my java class
public class Outlet {
static Connection con = null;
static Statement statement = null;
ResultSet resultSet = null;
public static String Outlet(String idDB) throws ClassNotFoundException, SQLException {
List<String> list = new ArrayList<String>();
con = DBConnection.createConnection();
statement = con.createStatement();
String sql="select CUSTOMERDESCRIPTOR as OUTLETNAME from ecustomer where CUSTOMERIDENTIFIER in(select CUSTOMERIDENTIFIER from mt_distributrol where mt_distributr_vcdistributrcode = '"+idDB+"')";
System.out.println("iddb :"+idDB);
try {
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
list.add(resultSet.getString("OUTLETNAME"));
}
} catch (SQLException e) {
e.printStackTrace();
}
String json = new Gson().toJson(list);
System.out.println("Json Outlet :"+json);
return json;
}
}
In the above java class i am returning a Json and i want to call that method into my servlet doGost
my doGet is
try {
String json = Outlet.Outlet(); //what should i pass here as a parameter
response.setContentType("application/json");
response.getWriter().write(json);
System.out.println("dheeraj"+json);
}
catch (Exception e) {
e.printStackTrace();
}
}
if i am passing idDB then it throws error.please anybody having any knowledge help me out
java sql servlets jdbc methods
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
1
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
1
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
check you DB for a validmt_distributr_vcdistributrcode
– Scary Wombat
Nov 20 '18 at 5:57
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00
|
show 6 more comments
I have a java class where i have a method which is returning me a json i want to call that method into my servlet doGet method so that i can make a AJAX call later
but while calling the java class method (Outlet.Outlet) it asks for a parameter to pass i dont know what to pass there
please have a look into my code
this is my java class
public class Outlet {
static Connection con = null;
static Statement statement = null;
ResultSet resultSet = null;
public static String Outlet(String idDB) throws ClassNotFoundException, SQLException {
List<String> list = new ArrayList<String>();
con = DBConnection.createConnection();
statement = con.createStatement();
String sql="select CUSTOMERDESCRIPTOR as OUTLETNAME from ecustomer where CUSTOMERIDENTIFIER in(select CUSTOMERIDENTIFIER from mt_distributrol where mt_distributr_vcdistributrcode = '"+idDB+"')";
System.out.println("iddb :"+idDB);
try {
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
list.add(resultSet.getString("OUTLETNAME"));
}
} catch (SQLException e) {
e.printStackTrace();
}
String json = new Gson().toJson(list);
System.out.println("Json Outlet :"+json);
return json;
}
}
In the above java class i am returning a Json and i want to call that method into my servlet doGost
my doGet is
try {
String json = Outlet.Outlet(); //what should i pass here as a parameter
response.setContentType("application/json");
response.getWriter().write(json);
System.out.println("dheeraj"+json);
}
catch (Exception e) {
e.printStackTrace();
}
}
if i am passing idDB then it throws error.please anybody having any knowledge help me out
java sql servlets jdbc methods
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
I have a java class where i have a method which is returning me a json i want to call that method into my servlet doGet method so that i can make a AJAX call later
but while calling the java class method (Outlet.Outlet) it asks for a parameter to pass i dont know what to pass there
please have a look into my code
this is my java class
public class Outlet {
static Connection con = null;
static Statement statement = null;
ResultSet resultSet = null;
public static String Outlet(String idDB) throws ClassNotFoundException, SQLException {
List<String> list = new ArrayList<String>();
con = DBConnection.createConnection();
statement = con.createStatement();
String sql="select CUSTOMERDESCRIPTOR as OUTLETNAME from ecustomer where CUSTOMERIDENTIFIER in(select CUSTOMERIDENTIFIER from mt_distributrol where mt_distributr_vcdistributrcode = '"+idDB+"')";
System.out.println("iddb :"+idDB);
try {
ResultSet resultSet = statement.executeQuery(sql);
while (resultSet.next()) {
list.add(resultSet.getString("OUTLETNAME"));
}
} catch (SQLException e) {
e.printStackTrace();
}
String json = new Gson().toJson(list);
System.out.println("Json Outlet :"+json);
return json;
}
}
In the above java class i am returning a Json and i want to call that method into my servlet doGost
my doGet is
try {
String json = Outlet.Outlet(); //what should i pass here as a parameter
response.setContentType("application/json");
response.getWriter().write(json);
System.out.println("dheeraj"+json);
}
catch (Exception e) {
e.printStackTrace();
}
}
if i am passing idDB then it throws error.please anybody having any knowledge help me out
java sql servlets jdbc methods
java sql servlets jdbc methods
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
edited Nov 20 '18 at 6:12
cricket_007
80.4k1142110
80.4k1142110
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
asked Nov 20 '18 at 5:53
dheeraj kumardheeraj kumar
40211
40211
1
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
1
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
check you DB for a validmt_distributr_vcdistributrcode
– Scary Wombat
Nov 20 '18 at 5:57
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00
|
show 6 more comments
1
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
1
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
check you DB for a validmt_distributr_vcdistributrcode
– Scary Wombat
Nov 20 '18 at 5:57
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00
1
1
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
1
1
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
check you DB for a valid
mt_distributr_vcdistributrcode– Scary Wombat
Nov 20 '18 at 5:57
check you DB for a valid
mt_distributr_vcdistributrcode– Scary Wombat
Nov 20 '18 at 5:57
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00
|
show 6 more comments
1 Answer
1
active
oldest
votes
Please read OWASP - SQL Injection and learn about PreparedStatements
First, methods should not start with capital letter, so rather you could name it like Outlet.findById rather than Outlet.Outlet (the method should not be the same as the class; it is really confusing to read), and you can get parameters from the request
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String s = Outlet.findById(id);
When calling the API, you add ?id=value
Or you can get the final part of the path from request, assuming your API is setup like /path/ids/value - Refer What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest? for options with this
Before doing this, of course you should double-check that query you are running actually returns data when querying the database directly.
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=xwill passxinto your query
– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,http/your.api.com/someAPI/ids/xto get that ID, or you can put?id=xat the end
– cricket_007
Nov 20 '18 at 6:10
|
show 4 more comments
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Please read OWASP - SQL Injection and learn about PreparedStatements
First, methods should not start with capital letter, so rather you could name it like Outlet.findById rather than Outlet.Outlet (the method should not be the same as the class; it is really confusing to read), and you can get parameters from the request
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String s = Outlet.findById(id);
When calling the API, you add ?id=value
Or you can get the final part of the path from request, assuming your API is setup like /path/ids/value - Refer What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest? for options with this
Before doing this, of course you should double-check that query you are running actually returns data when querying the database directly.
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=xwill passxinto your query
– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,http/your.api.com/someAPI/ids/xto get that ID, or you can put?id=xat the end
– cricket_007
Nov 20 '18 at 6:10
|
show 4 more comments
Please read OWASP - SQL Injection and learn about PreparedStatements
First, methods should not start with capital letter, so rather you could name it like Outlet.findById rather than Outlet.Outlet (the method should not be the same as the class; it is really confusing to read), and you can get parameters from the request
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String s = Outlet.findById(id);
When calling the API, you add ?id=value
Or you can get the final part of the path from request, assuming your API is setup like /path/ids/value - Refer What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest? for options with this
Before doing this, of course you should double-check that query you are running actually returns data when querying the database directly.
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=xwill passxinto your query
– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,http/your.api.com/someAPI/ids/xto get that ID, or you can put?id=xat the end
– cricket_007
Nov 20 '18 at 6:10
|
show 4 more comments
Please read OWASP - SQL Injection and learn about PreparedStatements
First, methods should not start with capital letter, so rather you could name it like Outlet.findById rather than Outlet.Outlet (the method should not be the same as the class; it is really confusing to read), and you can get parameters from the request
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String s = Outlet.findById(id);
When calling the API, you add ?id=value
Or you can get the final part of the path from request, assuming your API is setup like /path/ids/value - Refer What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest? for options with this
Before doing this, of course you should double-check that query you are running actually returns data when querying the database directly.
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
Please read OWASP - SQL Injection and learn about PreparedStatements
First, methods should not start with capital letter, so rather you could name it like Outlet.findById rather than Outlet.Outlet (the method should not be the same as the class; it is really confusing to read), and you can get parameters from the request
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String id = request.getParameter("id");
String s = Outlet.findById(id);
When calling the API, you add ?id=value
Or you can get the final part of the path from request, assuming your API is setup like /path/ids/value - Refer What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest? for options with this
Before doing this, of course you should double-check that query you are running actually returns data when querying the database directly.
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
edited Nov 20 '18 at 6:32
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
answered Nov 20 '18 at 6:02
cricket_007cricket_007
80.4k1142110
80.4k1142110
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=xwill passxinto your query
– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,http/your.api.com/someAPI/ids/xto get that ID, or you can put?id=xat the end
– cricket_007
Nov 20 '18 at 6:10
|
show 4 more comments
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=xwill passxinto your query
– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,http/your.api.com/someAPI/ids/xto get that ID, or you can put?id=xat the end
– cricket_007
Nov 20 '18 at 6:10
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
hey from where you are getting this "id" ?
– dheeraj kumar
Nov 20 '18 at 6:05
http://your.api.com/someAPI?id=x will pass x into your query– cricket_007
Nov 20 '18 at 6:07
http://your.api.com/someAPI?id=x will pass x into your query– cricket_007
Nov 20 '18 at 6:07
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
on my ui i don't have any input feild for idDB.. its is comming from loging query like there is a form form loging in on mu ui when ever a user looged in i run a query which checks username and pasword and also i get that value idDB from that query now i am passing that value into the java class methot which is Outlet and in that method i am using idDB in a query
– dheeraj kumar
Nov 20 '18 at 6:08
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
i didn't get you :(
– dheeraj kumar
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,
http/your.api.com/someAPI/ids/x to get that ID, or you can put ?id=x at the end– cricket_007
Nov 20 '18 at 6:10
okay... I don't know your API, or your app's logic... The answer is still the same. You need to form that URL so that you can actually get an ID. Either that is part of the path,
http/your.api.com/someAPI/ids/x to get that ID, or you can put ?id=x at the end– cricket_007
Nov 20 '18 at 6:10
|
show 4 more comments
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1
And what is the error?
– cricket_007
Nov 20 '18 at 5:56
1
By the way, you might want to research "SQL Injection" before writing more SQL queries like that
– cricket_007
Nov 20 '18 at 5:57
check you DB for a valid
mt_distributr_vcdistributrcode– Scary Wombat
Nov 20 '18 at 5:57
@cricket_007 in servlet when i am calling Outlet.Outlet() it says to pass a parameter what parameter should i pass? and what is SQL INJECTION ?
– dheeraj kumar
Nov 20 '18 at 5:59
@ScaryWombat what ?? i didn't get you
– dheeraj kumar
Nov 20 '18 at 6:00