Question

我正在尝试将数据插入名为mtdb的数据库，表userDB 我在jsf中编写我的网络应用程序，我能够渲染我的代码中包含的primeface元素，当我点击提交它没有插入任何数据库，你可以帮助我

我的xhtml页面是

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"  
      xmlns:f="http://java.sun.com/jsf/core"  
      xmlns:p="http://primefaces.org/ui">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Simple Web App</title>
</h:head>
<h:body>
<h:form>
    <p:outputLabel>Name:</p:outputLabel> <p:inputText id="nmn" value="#{sgbean.nmn}" />
    <p:outputLabel>Password:</p:outputLabel> <p:inputText id="pwd" value="#{sgbean.pwd}" />
    <p:commandButton id="btn" value="Submit" type="Submit" action="sgbean.add" />
</h:form>
</h:body>
</html>

托管Bean代码：

package jsfappTest;

import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.context.FacesContext;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.text.SimpleDateFormat;
import java.util.Date;


@SuppressWarnings("unused")
@ManagedBean(name="sgbean")
@RequestScoped
public class BeanGs {

    PreparedStatement ps = null;
    Connection con = null; 
    int i=0;
    private String nmn;
    private String pwd;
    private String msg;

    public String getNmn() {
        return nmn;
    }
    public void setNmn(String nmn) {
        this.nmn = nmn;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public String getMsg() {
        return msg;   }

    public void add(){

        try
                {
                        Class.forName("com.mysql.jdbc.Driver");
                        con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mtdb", "root", " ");
                        String sql = "INSERT INTO userDB(name,pwd) VALUES(?,?)";
                        ps= con.prepareStatement(sql); 
                        ps.setString(1, nmn);
                        ps.setString(2, pwd);
                        i = ps.executeUpdate();
                        System.out.println("Data Added Successfully");
                }

        catch(Exception e)
                {
                        System.out.println(e); 
                }
        finally
        {
                    try
                    {
                        con.close();
                        ps.close();
                    }

                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }
        }

   }
}

Answer 1

p：commandbutton上的action属性应该是action =＆＃34;＃{sgbean.add（）}

Answer 2

我更新了上面显示的managedBean“try”和“catch”块以识别错误

 try
            {
                     Class.forName("com.mysql.jdbc.Driver");
                     con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mtdb", "root", "");
                     con.setAutoCommit(false);

                     Statement stmt = con.createStatement();
                     String sql = "INSERT INTO userdb(name,pwd) VALUES('"+nmn+"','"+pwd+"')";

                     stmt.executeUpdate(sql);
                     con.commit();


            }

Catch块更新为

catch(Exception e)
            {
                   throw new FacesException(e);
            }

然后我在lib文件夹下包含了“mysql-connector-java-5.0.8-bin.jar”文件并且它工作得非常好感谢所有的帮助，最后我能够使用提供的提示弄清楚

无法在jsf应用程序中将数据插入数据库

2 个答案: