我想编辑数据表行。我的代码在这里：
我的jfs页面（Teszt.xhtml）更新：
<?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://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>Teszt</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 />
<h:form>
<p:fieldset legend="Teszt:">
<p:dataTable id="dataTable" value="#{TesztBean.values}" var="t" paginator="true" rows="10" editable="true" editMode="cell">
<p:ajax event="rowEdit" listener="#{TesztBean.update}"/>
<p:column filterBy="#{t.id}" sortBy="#{t.id}">
<f:facet name="header">ID:</f:facet>
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{t.id}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{t.id}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column filterBy="#{t.name}" sortBy="#{t.name}">
<f:facet name="header">Name:</f:facet>
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{t.name}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{t.name}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column filterBy="#{t.age}" sortBy="#{t.age}">
<f:facet name="header">Age:</f:facet>
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{t.age}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{t.age}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column><f:facet name="header">UPDATE</f:facet>
<p:commandButton value="Update" action="#{Teszt.updateOsszesito(t)}">
<f:ajax render="@all" execute="@form" />
</p:commandButton>
</p:column>
<p:column headerText="Edit">
<p:rowEditor/>
</p:column>
</p:dataTable>
</p:fieldset>
</h:form>
</html>
Teszt.java：
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 java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean
@SessionScoped
public class Teszt implements Serializable {
public List<TesztSetGet> selectTable(){
ResultSet rs = null;
PreparedStatement pst = null;
Connection con = getDBConnection();
String stm = "select * from teszt";
List<TesztSetGet> records = new ArrayList<TesztSetGet>();
try {
pst = con.prepareStatement(stm);
pst.execute();
rs = pst.getResultSet();
while(rs.next()){
TesztSetGet objectMeghiv = new TesztSetGet();
objectMeghiv.setId(rs.getInt(1));
objectMeghiv.setName(rs.getString(2));
objectMeghiv.setAge(rs.getInt(3));
records.add(objectMeghiv);
}
rs.close();
pst.close();
con.close();
} catch (SQLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return records;
}
public void updateOsszesito(TesztSetGet nth){
Connection connection = null;
PreparedStatement pst = null;
ResultSet rs = null;
String sql = "update teszt set name=?, age=? where id=?";
try{
connection = getDBConnection();
pst = connection.prepareStatement(sql);
pst.setString(1, nth.getName());
pst.setInt(2, nth.getAge());
pst.setInt(3, nth.getId());
System.out.println(nth.getId()+" " + nth.getName() + " " + nth.getAge() );
pst.executeUpdate();
pst.close();
connection.close();
}catch(SQLException se){
se.printStackTrace();
se.getMessage();
}catch(Exception e){
e.printStackTrace();
e.getMessage();
}
}
public Connection getDBConnection() {
Connection dbConnection = null;
String URL = "jdbc:mysql://IP:3306/osszesito";
String USER = "osszesito";
String PASSWORD = "Password";
String DRIVER = "com.mysql.jdbc.Driver";
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;
}
}
TesztBean.java 更新：
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;
public class TesztBean {
String URL = "jdbc:mysql://IP:3306/osszesito";
String USER = "osszesito";
String PASSWORD = "Password";
String DRIVER = "com.mysql.jdbc.Driver";
private List<TesztSetGet> values;
@PostConstruct
public void init() {
try {
values = selectTesztTable();
} catch (SQLException e) {
e.printStackTrace();
}
}
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<TesztSetGet> selectTesztTable() throws SQLException{
ResultSet rs = null;
PreparedStatement pst = null;
Connection con = getDBConnection();
String stm = "select * from teszt";
List<TesztSetGet> records = new ArrayList<TesztSetGet>();
try {
pst = con.prepareStatement(stm);
pst.execute();
rs = pst.getResultSet();
while(rs.next()){
TesztSetGet objectMeghiv = new TesztSetGet();
objectMeghiv.setId(rs.getInt(1));
objectMeghiv.setName(rs.getString(2));
objectMeghiv.setAge(rs.getInt(3));
records.add(objectMeghiv);
}
return records;
}catch (SQLException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}finally{
rs.close();
pst.close();
con.close();
}
return records;
}
public List<TesztSetGet> getValues() {
return values;
}
public void update(RowEditEvent event) {
TesztSetGet edittedObject = (TesztSetGet) event.getObject();
System.out.println(edittedObject.getName() + "--------------------------" +edittedObject.getAge());
Connection connection = null;
PreparedStatement pst = null;
ResultSet rs = null;
String sql = "update teszt set name=?, age=? where id=?";
try{
connection = getDBConnection();
pst = connection.prepareStatement(sql);
pst.setString(1, edittedObject.getName());
pst.setInt(2, edittedObject.getAge());
pst.setInt(3, edittedObject.getId());
pst.executeUpdate();
pst.close();
connection.close();
}catch(SQLException se){
se.printStackTrace();
se.getMessage();
}catch(Exception e){
e.printStackTrace();
e.getMessage();
}
}
}
有TesztSetGet（设置和获取方法）：
public class TesztSetGet {
private int id;
private String name;
private int age;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
当我修改单元格并单击更新按钮时，单元格将返回原始状态:(
如何修改和更新行？
非常感谢，
答案 0 :(得分：1)
您可以使用Primefaces for UI。
您必须将editable属性添加到datatable，然后添加包含rowEditor标记的列：
<p:column headerText="edit">
<p:rowEditor/>
</p:column>
可编辑列必须改变如下：
<p:column headerText="your column" >
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{t.name}"/>
</f:facet>
<f:facet name="input">
<h:inputText value="#{t.name}"/>
</f:facet>
</p:cellEditor>
</p:column>
更新： 添加ajax标记t datatable并为侦听器属性分配更新方法：
public class TesztBean {
public void update(RowEditEvent event) {
TesztSetGet edittedObject = (TesztSetGet) event.getObject();
// update values field
}
}