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java - Primefaces 搜索 mysql

转载 作者:行者123 更新时间:2023-11-30 00:16:34 28 4
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我有一个 jsf (jsf + primefaces 4.0 ) 页面。页面上有一个 inputtext 元素和一个命令按钮元素。

这是我的 jsf 文件:

  <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:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
>

<h:head>
<title>Keresés</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<link rel="stylesheet" type="text/css" href="style.css"/>

</h:head>

<ui:debug hotkey="1" />

<h:form>

<h:panelGrid columns="2">
<h:outputText value="ID:"/>
<p:inputText value="#{Kereses.id}" required="true" maxlength="20"/>
<p:commandButton id="addCategoryButton" value="Kereses" onclick="categoryDialog.show();" action="#{Kereses.selectTesztTable}"/>
</h:panelGrid>

<p:dialog id="categoryDialog" header="Category Detail" widgetVar="categoryDialog" closeOnEscape="true" resizable="false" style="width:1000px; height: 500px;" showEffect="explode" hideEffect="bounce">

<p:dataTable value="#{Kereses.values}" var="c"
styleClass="order-table" scrollable="true" scrollWidth="1500" scrollHeight="550">

<p:column style="width: 130px; text-align: center">
<f:facet name="header">OM kód:</f:facet>
<h:outputText value="#{c.omkod}" style="width: 130px; text-align: center"/>
</p:column>




</p:dataTable>
</p:dialog>
</h:form>
</html>

这是我的java代码:

import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;



@ManagedBean @SessionScoped



public class Kereses implements Serializable {

int id;
String omkod;

String URL = "jdbc:mysql://localhost:3306/osszesito?useUnicode=yes&characterEncoding=UTF-8";
String USER = "User";
String PASSWORD = "Password";
String DRIVER = "com.mysql.jdbc.Driver";

private List<Kereses> values;


public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getOmkod() {
return omkod;
}

public void setOmkod(String omkod) {
this.omkod = omkod;
}



public List<Kereses> getValues() throws SQLException{
values = selectTesztTable();
System.out.println("++++++++++++++++++++++++++++++++++++++++++++values erteke:" + values + "+++++++++++++++++++++++++++++++");
return values;

}

public Connection getDBConnection() {

Connection dbConnection = null;

try {

Class.forName(DRIVER);
dbConnection= DriverManager.getConnection(URL, USER, PASSWORD);
System.out.println("Connection completed.");

} catch (SQLException e) {

System.out.println(e.getMessage());

}catch(ClassNotFoundException cnfe){

cnfe.printStackTrace();
System.out.println(cnfe.getMessage());
System.exit(-1);

}

return dbConnection;
}



public List<Kereses> selectTesztTable() throws SQLException{

Kereses keres = new Kereses();
List<Kereses> lista = new ArrayList<Kereses>();
ResultSet rs = null;
PreparedStatement pst = null;
Connection con = getDBConnection();

String stmQuery = "SELECT * FROM teljes_osszesito where id like '"+ id + "'";


try {
pst = con.prepareStatement(stmQuery);
rs = pst.executeQuery();

while(rs.next()){

keres.setId(rs.getInt("id"));
keres.setOmkod(rs.getString("omkod"));

System.out.println("id: "+ getId() +" OM kód: " + getOmkod() +"---------------------vege-------------------");

}

return lista;


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

rs.close();
pst.close();
con.close();

}

return lista;

}


}

这是我的问题:

enter image description here

当我搜索时,我在输入文本中写入 id 值,然后单击命令按钮。但页面没有找到值(value)。如果我看到 server.log,我会看到 inputtext 值正确并选择查询正确,但我的 jsf 页面不显示值:(

为什么?

谢谢,

最佳答案

看起来您缺少更新数据表。所以该值在bean内部但不显示。

<h:form id="form">
<h:panelGrid columns="2">
<h:outputText value="ID:"/>
<p:inputText value="#{Kereses.id}" required="true" maxlength="20"/>
<p:commandButton id="addCategoryButton" value="Kereses" onclick="categoryDialog.show();" action="#{Kereses.selectTesztTable}" update=":form:data"/>
</h:panelGrid>
...

<p:dataTable id="data" value="#{Kereses.values}" var="c" styleClass="order-table" scrollable="true" scrollWidth="1500" scrollHeight="550">
<p:column style="width: 130px; text-align: center">
<f:facet name="header">OM kód:</f:facet>
<h:outputText value="#{c.omkod}" style="width: 130px; text-align: center"/>
</p:column>
</p:dataTable>
</h:form>

关于java - Primefaces 搜索 mysql,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23610705/

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