小编VJa*_*ain的帖子

与正面相比,为什么任何数据类型的范围在负面都比较大？

例如,在整数的情况下:

在Turbo C的它的范围是-32768要32767和Visual Studio的是-2147483648要2147483647.

其他数据类型也是如此......

[UPD:为Visual Studio设置适当的限制值]

在将此代码写入我的项目时,我收到了错误

错误1可访问性不一致:字段类型'System.Collections.Generic.List<Jain_milan.Childrendata>'比字段更难访问'Jain_milan.addchild.m_children'
错误2可访问性不一致:参数类型'System.Collections.Generic.List<Jain_milan.Childrendata>'比方法更难访问'Jain_milan.addchild.addchild(System.Collections.Generic.List<Jain_milan.Childrendata>)'

namespace Jain_milan
{
        public partial class addchild : Form
        {
            List<Label> label = new List<Label>();
            List<TextBox> textbox = new List<TextBox>();
            List<ComboBox> combobox = new List<ComboBox>();
            List<DateTimePicker> datetimepicker = new List<DateTimePicker>();
            public List<Childrendata> m_children = new List<Childrendata>();
            public addchild(List<Childrendata> children)
            {
                InitializeComponent();
                this.m_children = children; //Initialize the same List as sent by Mainform
            }

我的代码是查看gridview中的所有数据

Web.config代码是

<configuration>
  <connectionStrings>
    <add name="ConStr" connectionString="DataSource=.;Integrated Security=SSPI;Initial catalog=sshopping"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.5"/>
    <httpRuntime targetFramework="4.5"/>
  </system.web>
</configuration>

它在外部类中编码

namespace DBAction
{
    public class ViewAction
    {
        public DataSet GetAllData()
        {
                SqlCommand cmd = DataConnection.GetConnection().CreateCommand();
                cmd.CommandText = "Select UserName,Password,RoleName,EmailID,SecurityQuestion,SecurityAnswer,LastLogin from LoginInfo";
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();  
                da.Fill(ds);
                cmd.Dispose();
                DataConnection.CloseConnection();
                return ds;
        }
    }
}

它在行中给出错误da.Fill(ds) 将数据源与gridview绑定的代码在页面加载上编码,就像这样.

 DataSet ds = new ViewAction().GetAllData();
        gvLoginInfo.DataSource = ds;
        gvLoginInfo.DataBind();

而数据连接类中的conectionstring代码是

 public static SqlConnection GetConnection()
        {

            if (con == null) …

我有一个从多个表返回结果的存储过程

CREATE DEFINER=`root`@`localhost` PROCEDURE `GetProjectAndClientOverview`()
BEGIN
  SELECT ( SELECT count(*)  FROM projects_info) as "projects_done",
    (SELECT COUNT(*) FROM client_info) as "happy_clients",
    (SELECT count(*) FROM projects_info where category_id in(
select id from pme.projects_category
where category_name in 
("Commercial","Corporate","Hospitality")
))  as "real_professionals" ,
    (SELECT COUNT(*) FROM client_info) as "cups_of_coffee";
END

我必须使用 JPA 在 SpringBoot 中调用此过程，请指导如何为此存储过程创建实体类、存储库、服务。

我尝试创建实体类但不确定它是否正确

 package com.panchmeru_studio.entities;
    
    import lombok.Data;
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.NamedStoredProcedureQueries;
    import javax.persistence.NamedStoredProcedureQuery;
    
    @Data
    @Entity
   @NamedStoredProcedureQueries({
    @NamedStoredProcedureQuery(name = "getProjectAndClientOverview",
                                procedureName = "GetProjectAndClientOverview",
    resultClasses ={ ProjectsInfo.class ,ClientInfo.class})
})
    public class …

我想通过查询字符串传递两个参数cartid和productis.Cartid将从数据库中的会话(如果可用)生成,而Product将从先前的查询sting中获取

我的代码是(如果要从数据库中获取购物车ID)

        CartInfo cartinfo = new CartInfo();
        cartinfo.UserName = Session["UserName"].ToString();
        cartinfo.IsOrder = "0";
        cartinfo.CartDate = DateTime.Now;
        int id = new InsertAction().InsertData(cartinfo);
        if (id!=0)
        {
            lblmsg.Text = "Inserted Sucessfully";
            Session["CartID"] = id;
            if (Request.QueryString["ProductID"] != null)
            {
               int productid = int.Parse(Request.QueryString["ProductID"]);
            }
            Response.Redirect("ViewCartItems.aspx?CartID=id & ProductID=productid");

        }

如果要从创建的会话中获取cartid

if (Session["CartID"] != null)
        {
            string cartid;
            int productid;
            if (Request.QueryString["ProductID"] != null)
            {
                cartid = Session["CartID"].ToString();
                productid = int.Parse(Request.QueryString["ProductID"]);
                DataSet ds = new AddCartItem().GetCartItem(cartid, productid);
                if (ds.Tables[0].Rows.Count > 0)
                {
                    DataSet ds1 = …

我想通过创建一个简单的登录屏幕在我的项目中使用 Spring Boot Security，但在运行应用程序时出现这些错误

描述：com.panchmeru_studio.controller.UserController 中构造函数的参数 1 需要类型为“org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder”的 bean，但无法找到。

操作：考虑在配置中定义 org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder' 类型的 bean。 这是我的代码。

用户控制器

package com.panchmeru_studio.controller;

import com.panchmeru_studio.entities.ApplicationUser;
import com.panchmeru_studio.repository.ApplicationUserRepository;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/users")
public class UserController {

    private ApplicationUserRepository applicationUserRepository;
    private BCryptPasswordEncoder bCryptPasswordEncoder;

    public UserController(ApplicationUserRepository applicationUserRepository,
                          BCryptPasswordEncoder bCryptPasswordEncoder) {
        this.applicationUserRepository = applicationUserRepository;
        this.bCryptPasswordEncoder = bCryptPasswordEncoder;
    }

    @PostMapping("/record")
    public void signUp(@RequestBody ApplicationUser applicationUser) {
        applicationUser.setPassword(bCryptPasswordEncoder.encode(applicationUser.getPassword()));
        applicationUserRepository.save(applicationUser);
    }
}

安全配置.java

package com.panchmeru_studio.security;

import com.panchmeru_studio.filter.AuthenticationFilter;
import com.panchmeru_studio.filter.AuthorizationFilter;

import com.panchmeru_studio.service.ApplicationUserDetailsService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder; …