我想从数据库中显示公司 pojo 的实例。我只能显示 CompanyId，其余详细信息不会显示。
viewCompany.jsp
`<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form action="ViewCompany">
<s:textfield name="companyId" label="Enter Company ID">
<s:param name="companyId" value="company.companyId"></s:param>
</s:textfield>
<s:submit/>
</s:form>
</body>
</html>
` 我正在尝试输入companyId，并且该id对应的值应该显示到显示页面。
CompanyBean:
`package com.buhin.POJO;
public class Company {
private int companyId;
public String companyName;
public String contactPerson;
public String mobileNumber;
public String officeNumber;
public String mail;
public String addressLine1;
public String addressLine2;
public String cityName;
public String stateName;
public String zipcode;
//public Address address;
public Company(){}
public Company(int companyId){
this.companyId = companyId;
}
public int getCompanyId() {
return companyId;
}
public void setCompanyId(int companyId) {
this.companyId = companyId;
}
public String getCompanyName() {
return companyName;
}
public String getContactPerson() {
return contactPerson;
}
public String getMobileNumber() {
return mobileNumber;
}
public String getOfficeNumber() {
return officeNumber;
}
public String getMail() {
return mail;
}
public String getAddressLine1() {
return addressLine1;
}
public String getAddressLine2() {
return addressLine2;
}
public String getCityName() {
return cityName;
}
public String getStateName() {
return stateName;
}
public String getZipcode() {
return zipcode;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public void setContactPerson(String contactPerson) {
this.contactPerson = contactPerson;
}
public void setMobileNumber(String mobileNumber) {
this.mobileNumber = mobileNumber;
}
public void setOfficeNumber(String officeNumber) {
this.officeNumber = officeNumber;
}
public void setMail(String mail) {
this.mail = mail;
}
public void setAddressLine1(String addressLine1) {
this.addressLine1 = addressLine1;
}
public void setAddressLine2(String addressLine2) {
this.addressLine2 = addressLine2;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public void setStateName(String stateName) {
this.stateName = stateName;
}
public void setZipcode(String zipcode) {
this.zipcode = zipcode;
}
@Override
public String toString() {
return "Company [CompanyName=" + getCompanyName()
+ ", ContactPerson=" + getContactPerson()
+ ", MobileNumber=" + getMobileNumber()
+ ", OfficeNumber=" + getOfficeNumber() + ", Mail="
+ getMail() + ", AddressLine1=" + getAddressLine1()
+ ", AddressLine2()=" + getAddressLine2()
+ ", CityName()=" + getCityName() + ", StateName="
+ getStateName() + ", Zipcode=" + getZipcode()
+ "]";
}
}
ViewCompany.java(ActionClass)
`
package com.buhin.Action;
import com.buhin.POJO.*;
import com.buhin.DAO.*;
import com.opensymphony.xwork2.ActionSupport;
public class ViewCompany extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private int companyId;
Company company;
public Company getCompany(){
return company;
}
public void setCompany(Company company){
this.company = company;
}
public int getCompanyId(){
return companyId;
}
public void setCompanyId(int companyId){
this.companyId = companyId;
}
public String execute(){
CompanyDAO cdao = new CompanyDAO();
company = cdao.viewCompany(companyId);
//System.out.println(company.toString());
return "success";
}
}
CompanyDAO:
`package com.buhin.DAO;
import com.buhin.POJO.*;
import com.buhin.hibernate.*;
import com.opensymphony.xwork2.ActionSupport;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.SessionFactory;
public class CompanyDAO extends ActionSupport{
public CompanyDAO(){
}
/**
*
*/
private static final long serialVersionUID = 1L;
Company vCompany;
public String addCompany(Company company){
SessionFactory sessionfactory = HibernateUtil.getSessionFactory();
Session session = sessionfactory.openSession();
Transaction transaction = session.beginTransaction();
session.save(company);
transaction.commit();
session.close();
return "success";
}
public Company viewCompany(int companyId){
SessionFactory sessionfactory = HibernateUtil.getSessionFactory();
Session session = sessionfactory.openSession();
vCompany = (Company) session.get(com.buhin.POJO.Company.class, companyId);
return vCompany;
}
}
` 公司详细信息.jsp:
`<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:property value="company.companyId"/>
<s:property value="company.companyName"/>
<s:property value="company.contactPerson"/>
<s:property value="company.mobileNumber"/>
<s:property value="company.officeNumber"/>
<s:property value="company.mail"/>
<s:property value="company.addressLine1"/>
<s:property value="company.addressLine2"/>
<s:property value="company.cityName"/>
<s:property value="company.stateName"/>
<s:property value="company.zipcode"/>
</body>
</html>`
`
Struts.xml:
`<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.devMode" value="true"></constant>
<package name="com.buhin.POJO" extends="struts-default">
<!-- <action name="AddCompany" class="com.buhin.Action.AddCompany" method="execute">
<result name="success">/success.jsp</result>
</action>
--> <action name="ViewCompany" class="com.buhin.Action.ViewCompany" method="execute">
<result name="success">/companydetails.jsp</result>
</action>
</package>
</struts>
`
最佳答案
首先我同意@Aleksandr M，这是一个非常奇怪的结构。但尽管如此，这段代码还是有一些问题。
1) 您正在返回'success'来自操作方法的结果，因此您的结果应该是 <result name="success">/companydetails.jsp</result>
2) 您正在将 Company 对象存储在局部变量 ( Company viewCompany ) 中。这在您的 JSP 中不可用。
你应该做的是创建一个对象变量。为该变量添加 setter-getters 并在 JSP 中使用它，如下所示。
<s:property value="viewCompany.zipcode"/>
希望这有帮助。
关于java - 如何使用struts2和hibernate从数据库检索实例并显示它？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29074996/