Question

我正在使用此代码创建一个登录Web服务到数据库

public class classeConnection {
@GET
@Path (value="log/{a}/{b}")
@Produces(MediaType.APPLICATION_JSON)
public String execMAJ(@PathParam("a")String name,@PathParam("b")String lastname )throws SQLException  {
      String req;
      try  {
          Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e ){};
      Connection  cn= DriverManager.getConnection("jdbc:mysql://localhost:3306/codezone4", "root","");
      Statement st=cn.createStatement();
      req="select id from utilisateur where nom = '+name+' and prenom = '+lastname+' ";
      st.close(); 
      cn.close();
      System.out.println("success");
      return "login";
}
}

我的代码正在运行，但我不知道如何提取sql请求的结果（此处为id）对这个问题有什么建议吗？请帮忙！

Answer 1

public class classeConnection {

  @GET
  @Path (value="log/{a}/{b}")
  @Produces(MediaType.APPLICATION_JSON)
  public String execMAJ(@PathParam("a")String name,@PathParam("b")String lastname )throws SQLException  {

  String req;
  try  {
      Class.forName("com.mysql.jdbc.Driver");
  } catch (ClassNotFoundException e ){
      e.printStackTrace();
  }

  try { 
      Connection  cn= DriverManager.getConnection("jdbc:mysql://localhost:3306/codezone4", "root","");
      Statement st=cn.createStatement();
      req="select id from utilisateur where nom = "+name+" and prenom = "+lastname+" LIMIT 1";
      ResultSet res = st.executeQuery(req);
      if(res.first()) {
        String id = res.getString("id");
        System.out.println("id = "+id);
      } else {
        System.out.println("not found foo!");
      }
  }
  catch (SQLException s){
      s.printStackTrace();
  }  
  catch (Exception e){
    e.printStackTrace();
  }
  finally {
    st.close();
    cn.close();
  }
  return "login";
  }

}

在rest webservice中提取sql请求的结果

1 个答案: