Question

我试图将Index.xhtml页面上的输入文本中的输入添加到我的数据库中，一旦添加，我想将其显示在另一页上我已经制作的EG IndexOutput

我遇到的问题是它没有显示我输入的输入

只有已经预先填充在数据库中的输入显示在下面我拥有所有的（Java / XHTML /托管bean类）。

的index.xhtml

    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:p="http://xmlns.jcp.org/jsf/passthrough"
    xmlns:f="http://xmlns.jcp.org/jsf/core">

    <h:head>
    <title>Product Table</title>

    <f:metadata>
    <f:event listener="#{productController.loadProducts()}" type="preRenderView" />       
    </f:metadata>
    </h:head>

    <h:body>
    <h:form>
    ProdID: <h:inputText value="#{product.prodid}" 
            id="id" 
            p:placeholder="enter product id" 
            required="true"  
            requiredMessage="ID is mandatory" />
    <br />
    <br />
    Prod Desc: <h:inputText value="#{product.proddesc}" 
            p:placeholder="enter product name" 
            required="true"  
            requiredMessage="Name is mandatory" />
    <br />
    <br />


    <h:commandButton value="Display" action="IndexOutput" />

    </h:form>
    </h:body>
    </html>

IndexOutput.xhtml

    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:p="http://xmlns.jcp.org/jsf/passthrough"
    xmlns:f="http://xmlns.jcp.org/jsf/core">

    <h:head>
    <title>Product Table Output</title>

    <f:metadata>
    <f:event listener="#{productController.loadProducts()}"      type="preRenderView" />
    </f:metadata>
    </h:head>

    <h:body>
    <h:form>
    <h:commandButton value="Add" action="Index" />
    <br />
    <br />
       <h:dataTable 
         value="#{productController.products}" 
         var="p" 
         headerClass="table-header" 
         rowClasses="table-odd-row,table-even-row">
    <h:column>
      <f:facet name="header">Product</f:facet>
        #{p.prodid}
        #{p.proddesc}
    </h:column>
    </h:dataTable>
    </h:form>
    </h:body>
    </html>

ProductController.java

    package lab10;
    import java.util.ArrayList;
    import javax.faces.bean.ManagedBean;
    //import javax.faces.event.ComponentSystemEvent;

    @ManagedBean
    public class ProductController {
      private ArrayList<Product> products;
      private DAO dao;

      public ProductController() {
      try {
            dao = new DAO();
      } 
      catch (Exception e) {
        e.printStackTrace();
      }
    }

    public ArrayList<Product> getProducts() {
      return products;
    }

    public void setProducts(ArrayList<Product> products) {
        this.products = products;
    }

    public void loadProducts() throws Exception {
         products = dao.getProductDetails();
    } 
    }

Product.java

            package lab10;

    import javax.faces.bean.ManagedBean;

    @ManagedBean

    public class Product {

        private int prodid;
        private String proddesc;

        public Product() {
        }

        public Product(int prodid, String proddesc) {
            super();
            this.prodid = prodid;
            this.proddesc = proddesc;
        }

        public int getProdid() {
            return prodid;
        }

        public void setProdid(int prodid) {
            this.prodid = prodid;
        }

        public String getProddesc() {
            return proddesc;
        }

        public void setProddesc(String proddesc) {
            this.proddesc = proddesc;
        }

    }

DAO.java

            package lab10;

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

    import javax.naming.*;
    import javax.sql.DataSource;

    public class DAO {

        private DataSource mysqlDS;

        public DAO() throws Exception {
            Context context = new InitialContext();
            String jndiName = "java:comp/env/jdbc/employeesdb14";
            mysqlDS = (DataSource) context.lookup(jndiName);
        }
        /*************************************************************************************/
        public ArrayList<Product> getProductDetails() throws Exception {
            ArrayList<Product> products = new ArrayList<Product>();
            Connection conn = mysqlDS.getConnection();
            PreparedStatement myStmt = conn.prepareStatement("select * from product;");
            ResultSet rs = myStmt.executeQuery();
        /*************************************************************************************/     
            while (rs.next()) {
                int id = rs.getInt("PRODID");
                String pname = rs.getString("DESCRIP");
                products.add(new Product(id, pname));
            }

            return products;
        }


    }

通过Managed Bean中的数据库添加和显示输入

0 个答案: