Java: Insérer plusieurs lignes dans MySQL

Question

Je veux savoir comment je peux insérer des données en vrac à la fois à la base de données MySQL Je ne sais pas comment le faire.Insérer les données de la table lorsque vous cliquez sur soumettre le bouton selon mvc.

farmer id et name sont venus d'une autre table, je veux ajouter toutes les données dans une autre table, farmer id et name sont en lecture seule

check this pic

milkload page jsp

<form action="MilkloadAdd" method="post"> 
    <table id="example" class="display" width="100%" cellspacing="0"> 
     <% 
      List<Farmer> farmer = (List<Farmer>) 
      request.getAttribute("Farmer_list"); 
      for (Farmer emp1 : farmer) { 
     %> 
     <tr> 
     <td> <input type="text" name="f_id" value="<%=emp1.getfId()%>" readonly="readonly" required/></td> 
     <td> <input type="text" name="fname" value="<%=emp1.getfFname()%>" readonly="readonly"required/></td> 
     <td><input type="text" name="lactometer" value="" required onkeyup="snf();"/></td> 
     <td><input type="text" name="fatvalue" value="" required onkeyup="snf();"/></td> 
     <td><input type="text" name="weights" value=""required/> </td> 
     <td><input type="text" name="snf" value=""required readonly="readonly"/></td> 
     </tr> 
<% } %> 

milkload modèle classe

package com.nestle.model; 

public class Milkload { 
    public String getSnf() {return snf;} 
    public void setSnf(String snf) {this.snf = snf;} 
    public String getFid() {return fid;} 
    public void setFid(String fid) {this.fid = fid;} 
    public String getLactometer() {return lactometer;} 
    public void setLactometer(String lactometer) {this.lactometer = lactometer;} 
    public String getFatvalue() {return fatvalue;} 
    public void setFatvalue(String fatvalue) {this.fatvalue = fatvalue;} 
    public String getWeights() {return weights;} 
    public void setWeights(String weights) {this.weights = weights;} 
    public String getDate() {return date;} 
    public void setDate(String date) {this.date = date;} 
    public String getCpid() {return cpid;} 
    public void setCpid(String cpid) {this.cpid = cpid;} 
    public String getMilkindex() {return milkindex;} 
    public void setMilkindex(String milkindex) {this.milkindex = milkindex;} 
    private String fid; 
    private String lactometer; 
    private String fatvalue; 
    private String weights; 
    private String date; 
    private String cpid; 
    private String milkindex; 
    private String snf; 
} 

MilkLoadDAO Classe

package com.nestle.db; 

    public class MilkloadDAO { 
    private static final String SQL_INSERT_MILKLOAD="INSERT INTO 
    milk_load(Date,Cp_Id,F_Id,Fat,Weight,Lactormeter) VALUES (?,?,?,?,?,?)"; 

    public static void insertMilkLoad(Milkload milkload) { 
    try (Connection connection = DbConnect.getConnection()) { 
     PreparedStatement statement = 
connection.prepareStatement(SQL_INSERT_MILKLOAD); 
     statement.setString(1, milkload.getDate()); 
     statement.setString(2, milkload.getCpid()); 
     statement.setString(3, milkload.getFid()); 
     statement.setString(4, milkload.getFatvalue()); 
     statement.setString(5, milkload.getWeights()); 
     statement.setString(6, milkload.getLactometer()); 
     System.out.println(SQL_INSERT_MILKLOAD); 
     statement.execute(); 
    } catch (Exception e) { 
     System.out.println("MILKLOAD DAO error"+ e.getMessage()); 
     } 
    } 
} 

de servlet milkload

protected void doPost(HttpServletRequest request, HttpServletResponse 
    response) 
     throws ServletException, IOException { 

    String fid = request.getParameter("f_id"); 

    String lactometer = request.getParameter("lactometer"); 
    String fatvalue = request.getParameter("fatvalue"); 
    String weights = request.getParameter("weights"); 
    String date = request.getParameter("Date"); 

    String Cp_Id = "1"; 

    Milkload milkload =new Milkload(); 
    milkload.setCpid(Cp_Id); 
    milkload.setDate(date); 
    milkload.setFatvalue(fatvalue); 
    milkload.setFid(fid); 
    milkload.setLactometer(lactometer); 

    milkload.setWeights(weights); 
    MilkloadDAO.insertMilkLoad(milkload); 

} 

Answer 1

Vous pouvez utiliser cette façon d'obtenir des valeurs de plusieurs lignes.

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 

       MilkLoad milkload; 
       List<MilkLoad> listMilkLoad= new ArrayList<MilkLoad>(); 


       String[] fid = request.getParameterValues("f_id"); 
       String[] lactometer = request.getParameterValues("lactometer"); 
       String[] weights = request.getParameterValues("weights"); 
       String[] date = request.getParameterValues("Date"); 
       //Set other values like this as well. 


       for(int x=0;x<fid.length;x++){ 

        milkload = new MilkLoad(); 
        milkload.setFatvalue(fid[x]); 
        milkload.setLactometer((lactometer[x])); 
        //Set other values like this as well. 

        //Adding the object to a list 
        listMilkLoad.add(milkload); 
       } 

      MilkloadDAO.insertMilkLoad(listMilkLoad); 

    } 

La méthode de votre classe MilkLoadDAO doit être modifiée comme suit.

public static void insertMilkLoad(List<MilkLoad> listMildLoad){ 

    } 

Et votre classe MilkLoadDAO serait comme ceci.

public class MilkloadDAO { 
       private static final String SQL_INSERT_MILKLOAD="INSERT INTO 
       milk_load(Date,Cp_Id,F_Id,Fat,Weight,Lactormeter) VALUES (?,?,?,?,?,?)"; 

       public static void insertMilkLoad(List<listMilkLoad> listMildLoad) { 

        try (Connection connection = DbConnect.getConnection()) { 
        PreparedStatement statement = connection.prepareStatement(SQL_INSERT_MILKLOAD); 

        for(MilkLoad milkload:listMildLoad){ 
         statement.setString(1, milkload.getDate()); 
         statement.setString(2, milkload.getCpid()); 
         statement.setString(3, milkload.getFid()); 
         statement.setString(4, milkload.getFatvalue()); 
         statement.setString(5, milkload.getWeights()); 
         statement.setString(6, milkload.getLactometer()); 
         System.out.println(SQL_INSERT_MILKLOAD); 
         statement.execute(); 
        } 
       } catch (Exception e) { 
        System.out.println("MILKLOAD DAO error"+ e.getMessage()); 
        } 
       } 
      } 

Vous pouvez avoir besoin de légers ajustements en fonction de vos variables mais je pense que l'idée est claire.

Espérons que ça aide :)