使用rest web service，queryparam显示特定用户的详细信息

Question

我正在java上创建一个登录表单。宁静的网络服务。我已经登录并注册了。我在这里输入板号。我想根据输入的板号检索数据。我在这里只扫描板号，如果它在数据库中，但我不知道如何显示它的细节。这是我的代码。我很困惑。我不知道怎么做。

Constants.java

NSDecimalNumber

DatabaseConnection.java

package com.taxisafe.connection;

public class Constants {
public static String dbClass = "com.mysql.jdbc.Driver";
private static String dbName= "taxisafe";
public static String dbUrl = "jdbc:mysql://localhost:3306/"+dbName;
public static String dbUsername = "root";
public static String dbPassword = "";
}

JsonConstruction.java

package com.taxisafe.connection;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;

import com.taxisafe.objects.Objects;


public class DatabaseConnection {

@SuppressWarnings("finally")
public static Connection createConnection() throws Exception {
    Connection koneksyon = null;
    try {
        Class.forName(Constants.dbClass);
        koneksyon = DriverManager.getConnection(Constants.dbUrl, Constants.dbUsername, Constants.dbPassword);
    } catch (Exception e) {
        throw e;
    } finally {
        return koneksyon;
    }
}

//CHECK FOR LOGIN
public static boolean checkUser(String username, String password) throws Exception {  //checkLogin to checkUser
    boolean UserRecorded = false;
    Connection konek = null;
    try {
        try {
            konek = DatabaseConnection.createConnection();
        } catch (Exception e) {
            e.printStackTrace();
        }
        Statement statement = konek.createStatement();
        String code = "SELECT * FROM user WHERE username = '" + username + "' AND password=" + "'" + password + "'";
        ResultSet rs = statement.executeQuery(code);
        while (rs.next()) {
            UserRecorded = true;
        }
    } catch (SQLException sqle) {
        throw sqle;
    } catch (Exception e) {
        // TODO Auto-generated catch block
        if (konek != null) {
            konek.close();
        }
        throw e;
    } finally {
        if (konek != null) {
            konek.close();
        }
    }
    return UserRecorded;
}

// REGISTER USER
public static boolean registertheUser(String name, String username, String email, String password) throws SQLException, Exception { //inserUser - registertheUser
boolean insertUser = false; //insertStatus - insertUser
Connection konek = null;
try{
    try{
        konek = DatabaseConnection.createConnection();
    } 
    catch (Exception e){
        e.printStackTrace();
    }
    Statement statement = konek.createStatement();
            String code = "INSERT into user(name, username, emailaddress, password) values('"+name+ "',"+"'" + username + "','"+ email + "','" + password + "')";
    int dbrecord = statement.executeUpdate(code);
    if (dbrecord > 0){
        insertUser = true;
    }
} catch (SQLException sqle){
    throw sqle;
} catch (Exception e){
    if (konek !=null){
        konek.close();
    }
    throw e;
} finally{
    if (konek !=null){
        konek.close();
    }
} return insertUser;

}

//CHECK PLATE NUMBER
public static boolean checkPlate(String platenumber) throws Exception {  //checkLogin to checkUser
    boolean PlateRecorded = false;
    Connection konek = null;
    try {
        try {
            konek = DatabaseConnection.createConnection();
        } catch (Exception e) {
            e.printStackTrace();
        }
        Statement statement = konek.createStatement();
        String code = "SELECT * FROM taxi WHERE taxi_plate_no = '" + platenumber+ "'";
        ResultSet rs = statement.executeQuery(code);
        while (rs.next()) {
            PlateRecorded = true;
        }
    } catch (SQLException sqle) {
        throw sqle;
    } catch (Exception e) {
        // TODO Auto-generated catch block
        if (konek != null) {
            konek.close();
        }
        throw e;
    } finally {
        if (konek != null) {
            konek.close();
        }
    }
    return PlateRecorded;
}

}

PlateNumberCheck.java

package com.taxisafe.json;

import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

public class JsonConstruction {

public static boolean isNotNull(String text){
    return text !=null && text.trim().length() >=0 ? true : false;
}

public static String JSONResponse(String tag, boolean status){
    JSONObject object = new JSONObject();
    try{
        object.put("tag", tag);
        object.put("status", new Boolean(status));
    } catch (JSONException e){

    } return object.toString();
}

public static String JSONResponse(String tag, boolean status, String errorMessage){
    JSONObject object = new JSONObject();
    try{
        object.put("tag", tag);
        object.put("status", new Boolean(status));
        object.put("errorMessage", errorMessage);
    } catch (JSONException e){

    } return object.toString();
}

}

请帮我说明如何显示铭牌号的详细信息。