Question

我一直在搞乱我的一些教程文件，并尝试更改一个数据表，通常只会在显示花形信息表的表中显示一堆废话。我认为这些更改将非常热门（只是为我放入数据库中的任何内容切换变量名称）但似乎我错过了一些重要的东西。对此事的一些帮助或指导将不胜感激。

而不是表，我不断得到的输出是这个（字面意思是这个字符串）

Flower ID＃{f.flowerID}姓名＃{f.name}颜色＃{f.color}国家＃{f.country}价格＃{f.price}

与教程中格式良好的表格相反。 as opposed to the nicely formatted table from the tutorial

这是我的所有项目文件。我似乎无法找到任何错误日志。

ViewFlowers.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!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://xmlns.jcp.org/jsf/html"
  xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>
    <title>Flowers ABOUND</title>
    <h:outputStylesheet library="css" name="table-style.css" />
</h:head>
<h:body>

    <h1>FLOWERS GALORE</h1>

        <h:dataTable value="#{flower.getFlowerList()}" var="f"
                styleClass="order-table"
                headerClass="order-table-header"
                rowClasses="order-table-odd-row,order-table-even-row"
        >

        <h:column>
                <f:facet name="header">
                        Flower ID
                </f:facet>
                        #{f.flowerID}
        </h:column>

        <h:column>
                <f:facet name="header">
                        Name
                        </f:facet>
                        #{f.name}
        </h:column>

                <h:column>
                <f:facet name="header">
                        Color
                        </f:facet>
                        #{f.color}
        </h:column>

        <h:column>
                <f:facet name="header">
                        Country
                        </f:facet>
                        #{f.country}
        </h:column>

        <h:column>
                <f:facet name="header">
                        Price
                        </f:facet>
                        #{f.price}
        </h:column>

    </h:dataTable>
    </h:body>
</html>

FlowerBean.java

import jsf.Flower;

@ManagedBean(name="flower")
@RequestScoped
public class FlowerBean implements Serializable{
    /**
     * Creates a new instance of FlowerBean
     */

    DataSource ds;

    public FlowerBean() {

        //resource injection
//  @Resource(name="jdbc/flower")

//  if resource injection is not support, you still can get it manually.
            try {
                    Context ctx = new InitialContext();
                    ds = (DataSource)ctx.lookup("jdbc:mysql://localhost/flow");
            } catch (NamingException e) {
                    e.printStackTrace();
            }
    }

    //connect to DB and get customer list
    public List<Flower> getFlowerList() throws SQLException{

        if(ds==null)
            throw new SQLException("Can't get data source");

        //get database connection
        Connection con = ds.getConnection();

        if(con==null)
            throw new SQLException("Can't get database connection");

        PreparedStatement ps 
            = con.prepareStatement(
               "select flower_id, flower_name, flower_color, "
                                   + "flower_country, flower_price from customer"); 

        //get customer data from database
        ResultSet result =  ps.executeQuery();

                List<Flower> list = new ArrayList<Flower>();

        while(result.next()){
            Flower flow = new Flower();

                        flow.setFlowerID(result.getLong("flower_flowerid"));
                        flow.setName(result.getString("flower_name"));
            flow.setColor(result.getString("flower_color"));
                        flow.setCountry(result.getString("flower_country"));
                        flow.setPrice(result.getDouble("flower_price"));

            //store all data into a List
            list.add(flow);
        }
        return list;
        }
}

Flower.java

package jsf;

public class Flower {
    public long flowerID;
    public String name;
    public String color;
    public String country;
    public double price;

    public long getFlowerID() {
        return flowerID;
    }

    public void setFlowerID(long flowerID) {
        this.flowerID = flowerID;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

}

表的style.css

.order-table{   
    border-collapse:collapse;
}

.order-table-header{
    text-align:center;
    background:none repeat scroll 0 0 #E5E5E5;
    border-bottom:1px solid #BBBBBB;
    padding:16px;
}

.order-table-odd-row{
    text-align:center;
    background:none repeat scroll 0 0 #FFFFFFF;
    border-top:1px solid #BBBBBB;
}

.order-table-even-row{
    text-align:center;
    background:none repeat scroll 0 0 #F9F9F9;
    border-top:1px solid #BBBBBB;
}

Answer 1

我正面临类似的问题。

在创建动态Web项目时，我没有在配置中设置 Java Server Faces v2.2项目。要在您的项目中下载Java Server Faces功能，这是必需的。检查下面的图像，其中的设置以黄色突出显示。根据您使用的版本配置设置。

JSF数据表不显示任何数据

1 个答案: