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데이터베이스의 항목을 보여주는 Java Server Faces 2.0의 xhtml 페이지를 간단하게 처리하려고합니다. JDBC-MySQL 메서드가 Database.java 인 경우 빈 페이지 만 얻습니다. 그래서 SQL 쿼리가 작동합니다.관리 대상 빈에 의해 MySQL 데이터를 표시하는 방법은 무엇입니까?
이제는 내 프로그래밍을 http://horstmann.com/corejsf/ 예제를 기반으로합니다. 나는 웹 개발 플러그인 이클립스를 사용하고
, 톰캣 (7)와 MySQL 5.5.14
index.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:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<title>pageTitle</title>
</h:head>
<h:body>
<h:form>
<h:dataTable value="#{database.all}" var="db">
<h:column>
#{db.OriginalToken}
</h:column>
<h:column>
#{db.Probability}
</h:column>
<h:column>
#{db.StandardToken}
</h:column>
<h:column>
#{db.Lemma}
</h:column>
<h:column>
#{db.Notes}
</h:column>
</h:dataTable>
</h:form>
</h:body>
</html>
얼굴-config.xml에
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2.0">
<managed-bean>
<managed-bean-name>database</managed-bean-name>
<managed-bean-class>classes.Database</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
web.xml
당신의 관리 빈에서 1,363,210<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>cancTestDatabaseExNovo</display-name>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<description>
This parameter tells MyFaces if javascript code should be allowed in
the rendered HTML output.
If javascript is allowed, command_link anchors will have javascript code
that submits the corresponding form.
If javascript is not allowed, the state saving info and nested parameters
will be added as url parameters.
Default is 'true'</description>
<param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<description>
If true, rendered HTML code will be formatted, so that it is 'human-readable'
i.e. additional line separators and whitespace will be written, that do not
influence the HTML code.
Default is 'true'</description>
<param-name>org.apache.myfaces.PRETTY_HTML</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<description>
If true, a javascript function will be rendered that is able to restore the
former vertical scroll on every request. Convenient feature if you have pages
with long lists and you do not want the browser page to always jump to the top
if you trigger a link or button action that stays on the same page.
Default is 'false'
</description>
<param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
<param-value>true</param-value>
</context-param>
<listener>
<listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>
</web-app>
Database.java
package classes;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import javax.sql.DataSource;
import javax.sql.rowset.CachedRowSet;
import javax.annotation.Resource;
@ManagedBean
@RequestScoped
public class Database
{
private static Statement statement;
private static Connection connection;
private ResultSet result;
public static void main(String[] args)
{
Database database = new Database();
try
{
ResultSet result = database.getAll();
while(result.next())
{
System.out.println(result.getString(1));
}
/*System.out.println("\n");
ResultSet result2 = database.getAll();
while(result2.next())
{
System.out.println(result2.getString(1));
}*/
}
catch (SQLException e)
{
e.printStackTrace();
System.out.println("SQLException");
}
catch(IOException e)
{
e.printStackTrace();
System.out.println("IOException");
}
catch (InstantiationException e)
{
e.printStackTrace();
System.out.println("InstantiationException");
}
catch (IllegalAccessException e)
{
e.printStackTrace();
System.out.println("IllegalAccessException");
}
catch (ClassNotFoundException e)
{
e.printStackTrace();
System.out.println("class NOT FOUND");
}
}
public ResultSet getAll() throws SQLException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException
{
try
{
connection = getConnection();
statement = connection.createStatement();
Statement stmt = connection.createStatement();
ResultSet result = stmt.executeQuery("SELECT * FROM LAIDict");
CachedRowSet crs = new com.sun.rowset.CachedRowSetImpl();
crs.populate(result);
return crs;
}
finally
{
connection.close();
}
}
/*public String[] getAll() throws SQLException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException
{
String[] string = {"ciao", "come", "stai"};
return string;
}*/
public void setAll()
{
}
/**
Gets a connection from the properties specified
in the file database.properties
@return the database connection
* @throws ClassNotFoundException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public static Connection getConnection()
throws SQLException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException
{
Properties props = new Properties();
FileInputStream in = new FileInputStream("/home/caterpillar/workspace/cancTestDatabaseExNovo/database.properties");
props.load(in);
in.close();
String drivers = props.getProperty("jdbc.drivers");
if (drivers != null)
System.setProperty("jdbc.drivers", drivers);
String url = props.getProperty("jdbc.url");
String username = props.getProperty("jdbc.username");
String password = props.getProperty("jdbc.password");
Class.forName(drivers).newInstance();
return DriverManager.getConnection(url, username, password);
}
private PreparedStatement insertStatement;
private PreparedStatement rispostaStatement;
private static final String insertString = "INSERT INTO (?) VALUES (?, ?)";
private static final String insertStringV2 = "INSERT INTO (?) VALUES (?)";
private static final String risposta = "SELECT * FROM LAIDict";
}