（1）问题的引出：
为了简单方便我们需要一种可以一次性全部提交表单数据的技术，也就是要说的：Bean表单
（2）BeanUtilities代码如下：
package com.lc.ch04Biaodanshuju;
import java.util.*;
import javax.servlet.http.*;
import org.apache.commons.beanutils.BeanUtils;
public class BeanUtilities {
public static void populateBean(Object formBean,
HttpServletRequest request) {
populateBean(formBean, request.getParameterMap());
}
public static void populateBean(Object bean,
Map propertyMap) {
try {
BeanUtils.populate(bean, propertyMap);
} catch(Exception e) {
// Empty catch. The two possible exceptions are
// java.lang.IllegalAccessException and
// java.lang.reflect.InvocationTargetException.
// In both cases, just skip the bean operation.
}
}
}
（3）一下是利用一个收集保险雇员保险信息的servlet，用它来确定可行的保险计划和相关的费用。
package com.lc.ch04Biaodanshuju;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SubmitInsuranceInfo extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
InsuranceInfo info = new InsuranceInfo();
BeanUtilities.populateBean(info, request);
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
String title = "Insurance Info for " + info.getName();
out.println(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<CENTER>\n" +
"<H1>" + title + "</H1>\n" +
"<UL>\n" +
" <LI>Employee ID: " +
info.getEmployeeID() + "\n" +
" <LI>Number of children: " +
info.getNumChildren() + "\n" +
" <LI>Married?: " +
info.isMarried() + "\n" +
"</UL></CENTER></BODY></HTML>");
}
}
（4）连接数据库的javabean
package com.lc.ch04Biaodanshuju;
public class InsuranceInfo {
private String name = "No name specified";
private String employeeID = "No ID specified";
private int numChildren = 0;
private boolean isMarried = false;
public String getName() {
return(name);
}
public void setName(String name) {
this.name = ServletUtilities.filter(name);
}
public String getEmployeeID() {
return(employeeID);
}
public void setEmployeeID(String employeeID) {
this.employeeID = ServletUtilities.filter(employeeID);
}
public int getNumChildren() {
return(numChildren);
}
public void setNumChildren(int numChildren) {
this.numChildren = numChildren;
}
public boolean isMarried() {
return(isMarried);
}
public void setMarried(boolean isMarried) {
this.isMarried = isMarried;
}
}
（5）
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Employee Insurance Signup</TITLE></HEAD> <BODY BGCOLOR="#FDF5E6"> <CENTER> <H1>Employee Insurance Signup</H1> <FORM ACTION="/servlet/coreservlets.SubmitInsuranceInfo"> Name: <INPUT TYPE="TEXT" NAME="name"><BR> Employee ID: <INPUT TYPE="TEXT" NAME="employeeID"><BR> Number of Children: <INPUT TYPE="TEXT" NAME="numChildren"><BR> <INPUT TYPE="CHECKBOX" NAME="married" VALUE="true">Married?<BR> <CENTER><INPUT TYPE="SUBMIT"></CENTER> </FORM> </CENTER></BODY></HTML>
（6）jar包的获取与使用：我们要使用工具类 必学的jar包，下载地址：http://download.csdn.net/detail/u010870518/7867181 别忘了添加配置！
时间： 2024-11-08 23:31:11