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GetData.java
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95 lines (74 loc) · 2.55 KB
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import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.sql.ResultSet;
import com.google.gson.Gson;
@WebServlet(urlPatterns = "/getData")
public class GetData extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
ArrayList<JsonData> allItems = new ArrayList<>();
DecimalFormat df = new DecimalFormat();
df.setMinimumFractionDigits(2);
String sql = null;
Connection c = null;
Statement stmt = null;
String URL = "jdbc:postgresql://localhost:5432/inventory";
String USER = "inventory";
String PWD = "inventory";
String db = "INV_TEST2";
Class.forName("org.postgresql.Driver");
c = DriverManager.getConnection(URL, USER, PWD);
stmt = c.createStatement();
sql = "SELECT * FROM " + db + " ORDER BY NAME, PART";
System.out.println(sql);
ResultSet rs = stmt.executeQuery(sql);
// ResultSetMetaData rsmd = rs.getMetaData();
// int columnCount = rsmd.getColumnCount();
while(rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
String part = rs.getString("part");
String material = rs.getString("material");
String batch = rs.getString("batch");
int qty = rs.getInt("qty");
allItems.add(new JsonData(id, name, part, material, batch, qty));
// System.out.println(name + "\t" + part + "\t" + material +
// "\t" + qty);
}
// for allname here
//
// sql = "SELECT * FROM CUSTODIANS" + " ORDER BY MEMBER";
// rs = stmt.executeQuery(sql);
String json = new Gson().toJson(allItems);
// System.out.println(json);
response.setContentType("application/json");
response.getWriter().write(json);
stmt.close();
c.close();
} catch(Exception e) {
e.printStackTrace();
System.out.println(e);
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
}