JSP+JavaBean不能使用jsp:setProperty name="BeanName" property="*"/>来自动提交日期表单
解决问题点：JSP+JavaBean不能使用jsp:setProperty name="BeanName" property="*"/>来自动提交日期表单
SQL Server 2000 + Tomcat 5.0
1. DB script
create table basic_employee(id varchar(10) not null primary key, birthday datetime not null)
2. JavaBean
(1)EmployeeInfo.java
import java.util.Date;
public class EmployeeInfo {
String id;
Date birthday;
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
(2)EmployeeRegist.java
import java.sql.Connection;
import java.sql.Date;
import java.sql.Timestamp;
import java.sql.PreparedStatement;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import com.easysoft.db.*;
public class EmployeeRegist {
private EmployeeInfo employeeInfo;
private DBConnect dbConnect;
private Connection conn;
private int i = 0;
public void setEmployeeInfo(EmployeeInfo employee) {
this.employeeInfo = employee;
}
public final static java.sql.Timestamp string2Time(String dateString)
throws java.text.ParseException {
DateFormat dateFormat;
dateFormat = new SimpleDateFormat("yyyy-MM-dd");
dateFormat.setLenient(false);
java.util.Date timeDate = dateFormat.parse(dateString);
java.sql.Timestamp dateTime = new java.sql.Timestamp(timeDate.getTime());
return dateTime;
}
public void regist() throws Exception {
String reg = "insert into basic_employee(id,birthday) " +
"values(?, ?)";
try {
conn = dbConnect.getConnection();
PreparedStatement pstmt = conn.prepareStatement(reg);
pstmt.setString(++i, employeeInfo.getId());
System.out.println(employeeInfo.getBirthday());
pstmt.setTimestamp(++i, new Timestamp(employeeInfo.getBirthday().getTime()));
//Execute update
pstmt.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
}
3. JSP
(1)register.jsp
<%@ page language="java" contentType="text/html;charset=gb2312"%>
<html>
<head>
<title>Create new Employee information</title>
</head>
<link href="css/hellking.css" rel="stylesheet" type="text/css" />
<body>
<form method="post" action="newEmployee.jsp" name="form1">
<table border="0" cellspacing="0" cellpadding="0" width="500">
<tr>
<td><font color=red>*</font>ID</td>
<td><input name=id></td>
</tr>
<tr>
<td><font color=red>*</font>Birthday</td>
<td><input name=birthday></td>
</tr>
<tr>
<td><input type=submit value=Insert name=submitButton></input></td>
<td><input type=reset value=Reset name=resetButton></input></td>
</tr>
</table>
</form>
</body>
</html>
(2)newEmployee.jsp
<%@ page language="java" contentType="text/html;charset=gb2312" import="com.easysoft.employee.*" %>
<%
String idStr = request.getParameter("id");
String birthday = request.getParameter("birthday");
EmployeeInfo employeeInfo = new EmployeeInfo();
EmployeeRegist regist = new EmployeeRegist();
employeeInfo.setId(idStr);
employeeInfo.setBirthday(regist.string2Time(birthday));
regist.setEmployeeInfo(employeeInfo);
regist.regist();
out.println("Create Employee info success.");
%>
如果把newEmployee.jsp，
<%@ page language="java" contentType="text/html;charset=gb2312" import="com.easysoft.employee.*" %>
<jsp:useBean id="employeeInfo" class="com.easysoft.employee.EmployeeInfo" scope="page">
<jsp:setProperty name="employeeInfo" property="*"/>
</jsp:useBean>
<jsp:useBean id="regist" class="com.easysoft.employee.EmployeeRegist" scope="page">
</jsp:useBean>
<%
regist.setEmployeeInfo(employeeInfo);
regist.regist();
out.println("Create Employee info success.");
%>
会抛出异常：
org.apache.jasper.JasperException: jsp.error.beans.property.conversion
org.apache.jasper.runtime.JspRuntimeLibrary.getValueFromPropertyEditorManager(JspRuntimeLibrary.java:931)
org.apache.jasper.runtime.JspRuntimeLibrary.convert(JspRuntimeLibrary.java:313)
org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:399)
org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:352)
org.apache.jasper.runtime.JspRuntimeLibrary.introspect(JspRuntimeLibrary.java:330)
org.apache.jsp.managestudent_jsp._jspService(managestudent_jsp.java:84)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
原因是：jsp:setProperty name="employeeInfo" property="*"/>无法自动转换为日期类型。
property="*" -->只能自动转换Boolean, Byte,String, int, float 等等类型，不包含Date类型，所以在提交的时候必须自己转换。不知道这样的理解是否正确。