restful webservices jax-rs post metodu çalışmıyor

Question

"/ adduser" adresine bir istek gönderildiğinde, {@ iduser ": 5," name ":" gibi istek verilerinde olduğu gibi)

package com.dbproject; 

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.SQLException; 

public class DbConnection { 

    public static Connection getConnection(){ 
     Connection con=null; 
     try { 
      Class.forName("com.mysql.jdbc.Driver").newInstance(); 
      con=DriverManager.getConnection("jdbc:mysql://localhost:3307/thedb","root","root"); 

     } 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(); 
     } catch (SQLException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     return con; 

    } 


} 

DbServices.java

package com.dbproject; 

import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.util.ArrayList; 
import java.util.List; 


public class DbServices { 
    Connection  con=DbConnection.getConnection(); 


    public String addUser(int iduser,String name) throws SQLException{ 
     PreparedStatement ps=con.prepareStatement("insert into users values("+iduser+","+name+")"); 
     int res=ps.executeUpdate(); 
     con.close(); 
     if(res>0){ 
      System.out.println("Insert Query Successfull"); 
      return "Done"; 
     } 
     else{ 
      System.out.println("Insert Query Failed"); 
      return "Error"; 
     }  
    } 


} 

Bilinmeyen sütun 'bob' 'alan listesinde'

DbConnection.java içinde: bob "}, dinlenme istemci 500 hatası veriyor ve tutulma konsol MySqlSyntaxErrorException verir Resources.java

package com.dbproject; 

import java.io.IOException; 
import java.sql.SQLException; 
import java.util.ArrayList; 
import java.util.List; 

import javax.ws.rs.Consumes; 
import javax.ws.rs.GET; 
import javax.ws.rs.POST; 
import javax.ws.rs.Path; 
import javax.ws.rs.PathParam; 
import javax.ws.rs.Produces; 
import javax.ws.rs.core.MediaType; 
import javax.ws.rs.core.Response; 

import com.google.gson.Gson; 
import com.google.gson.JsonObject; 


@Path("/user") 
public class Resources { 
    DbServices dbServices=new DbServices(); 

    @POST 
    @Path("/adduser") 
    @Consumes(MediaType.TEXT_PLAIN) 
    @Produces(MediaType.TEXT_PLAIN) 
    public String addUser(String s) throws SQLException{ 
     Gson gson=new Gson(); 
     UserModel userModel=gson.fromJson(s,UserModel.class); 
     String str=dbServices.addUser(userModel.getIduser(),userModel.getName()); 
    return str; 
    } 

} 

UserModel.java

package com.dbproject; 

import javax.xml.bind.annotation.XmlRootElement; 

@XmlRootElement 
public class UserModel { 
    private int iduser; 
    private String name; 

    public int getIduser() { 
     return iduser; 
    } 
    public String getName() { 
     return name; 
    } 
    public void setIduser(int iduser) { 
     this.iduser = iduser; 
    } 
    public void setName(String name) { 
     this.name = name; 
    } 

} 

Web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 
    <display-name>dbproject</display-name> 

<servlet> 
<servlet-name>Jersey Web Services</servlet-name> 
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> 
<init-param> 
<param-name>jersey.config.server.provider.packages</param-name> 
<param-value>com.dbproject</param-value> 
</init-param> 
<load-on-startup>1</load-on-startup> 
</servlet> 
<servlet-mapping> 
<servlet-name>Jersey Web Services</servlet-name> 
<url-pattern>/api/*</url-pattern> 
</servlet-mapping> 


</web-app> 

Answer 1

MySqlSyntaxErrorException

Eğer SQL üzerinde bir sözdizimi hatası var anlamına gelir.

"insert into users values("+iduser+","+name+")" 

Dize değerleri, tırnak işareti gerektirir. name değeri

+",'"+name+"')" 

Numaraları onlara ihtiyacım yok tırnak içinde sarılı gerekmektedir.

Bundan başka, PreparedStatement'u bile doğru kullanamazsınız. ? sözdizimini kullanıyor ve bunları değiştirmek için PreparedStatment API'sini kullanmalısınız. Örneğin.

PreparedStatement ps=con.prepareStatement("insert into users values(?,?)"); 
ps.setInt(1, isuser); 
ps.setString(2, name); 
int result = ps.executeUpdate(); 

Ayrıca Bakınız:

• Using Prepared Statements