无法使用 dataTable 显示数据库表值
我有一个 bean 类员工,具有属性 id、name 以及公共 getter 和 setter。
我使用以下 bean 进行数据库连接并从数据库表中获取值。
TableBean.java:
public class TableBean{
public Connection getVConnection() throws Exception{
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:globldb3";
String username = "scott";
String password = "tiger";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public List<Employee> getPerInfoAll() {
int i = 0;
Connection conn = null;
PreparedStatement pstmt = null;
List<Employee> perInfoAll = new ArrayList();
try {
conn = getVConnection();
String query = "select * from employee where e_id>5400";
pstmt = conn.prepareStatement(query);
rs = pstmt.executeQuery();
while(rs.next()){
System.out.println(rs.getString(1));
perInfoAll.add(i,newEmployee(rs.getInt(1),rs.getString(2)));
i++;
}
pstmt.close();
rs.close();
conn.close();
}catch (Exception e){
e.printStackTrace();
}
return perInfoAll;
}
以下是jsf页面:
<h:dataTable value="#{TableBean.perInfoAll}" var="e">
<h:column>
<f:facet name="header">Employee id</f:facet>
<h:outputText value="#{e.id}">
</h:column>
<h:column>
<f:facet name="header">Employee name</f:facet>
<h:outputText value="#{e.name}">
</h:column>
</h:dataTable>
请回复。 提前致谢。
I'm having a bean class employee having attributes id,name along with public getters and setters.
I'm using following bean for db connection and getting values from database table.
TableBean.java:
public class TableBean{
public Connection getVConnection() throws Exception{
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:globldb3";
String username = "scott";
String password = "tiger";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public List<Employee> getPerInfoAll() {
int i = 0;
Connection conn = null;
PreparedStatement pstmt = null;
List<Employee> perInfoAll = new ArrayList();
try {
conn = getVConnection();
String query = "select * from employee where e_id>5400";
pstmt = conn.prepareStatement(query);
rs = pstmt.executeQuery();
while(rs.next()){
System.out.println(rs.getString(1));
perInfoAll.add(i,newEmployee(rs.getInt(1),rs.getString(2)));
i++;
}
pstmt.close();
rs.close();
conn.close();
}catch (Exception e){
e.printStackTrace();
}
return perInfoAll;
}
Following is jsf page:
<h:dataTable value="#{TableBean.perInfoAll}" var="e">
<h:column>
<f:facet name="header">Employee id</f:facet>
<h:outputText value="#{e.id}">
</h:column>
<h:column>
<f:facet name="header">Employee name</f:facet>
<h:outputText value="#{e.name}">
</h:column>
</h:dataTable>
Kindly reply.
Thanks in advance.
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我认为这可能是(再次)getter/setter 的问题方法命名。如果您的属性已命名,则
getter 方法必须
注意方法名称中的大写“P”。
此外,您的 Facelet 中的 el 表达式后面不需要分号。
I think it may be (again) a problem of getter/setter method naming. If your property is named
the getter method must be
Notice the upper case "P" in the method name.
Furthermore, you don't need the semicolon after the el expression in your facelet.