接下来我们看看我们 WEB应用的JAVA代码,首先是各个模块的DAO，它们充分利用了Spring对Hibernate的支持：
package org.leno.hr.dao;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import org.leno.hr.User;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class LogonDAO extends HibernateDaoSupport {
public int removeRecords(final ArrayList<String> ids) throws Exception {
if (ids == null || ids.size() == 0) {
return -1;
}
getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session) {
for (int i = 0; i < ids.size(); i++) {
session.createQuery(
"delete from userInfo o where o.id=" + ids.get(i))
.executeUpdate();
}
return 1;
}
});
return 1;
}
@SuppressWarnings("unchecked")
public List<User> getRecords() throws Exception {
return getHibernateTemplate().loadAll(User.class);
}
@SuppressWarnings("unchecked")
public List<User> getUserList(String userName, String passWord)
throws Exception {
List<User> results = getHibernateTemplate().find(
"from User u where u.userName='" + userName
+ "' and u.passWord='" + passWord + "'");
return results;
}
public int insertUser(User user) throws Exception {
getHibernateTemplate().persist(user);
return 1;
}
public int updateUser(User user) throws Exception {
getHibernateTemplate().merge(user);
return 1;
}
}
package org.leno.hr.dao;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import org.leno.hr.Person;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class PersonDAO extends HibernateDaoSupport {
public int removeRecords(final ArrayList<String> ids) throws Exception {
if (ids == null || ids.size() == 0) {
return -1;
}
return (Integer) getHibernateTemplate().execute(
new HibernateCallback() {
public Object doInHibernate(Session session) {
for (int i = 0; i < ids.size(); i++) {
session.createQuery(
"delete from Person o where o.id="
+ ids.get(i)).executeUpdate();
}
return 1;
}
});
}
@SuppressWarnings("unchecked")
public List<Person> getRecords(final int page, final int pageSize)
throws Exception {
return (List<Person>) getHibernateTemplate().execute(
new HibernateCallback() {
public Object doInHibernate(final Session session) {
return session.createQuery("from Person")
.setFirstResult(page).setMaxResults(pageSize)
.list();
}
});
}
public int insertPerson(Person person) throws Exception {
getHibernateTemplate().saveOrUpdate(person);
return 1;
}
public int updatePerson(Person person) throws Exception {
getHibernateTemplate().saveOrUpdate(person);
return 1;
}
public int getTotalNums() {
long count = (Long) getHibernateTemplate().execute(
new HibernateCallback() {
public Object doInHibernate(final Session session) {
return (Long) session.createQuery(
"select count(*) from Person").uniqueResult();
}
});
return (int) count;
}
}
package org.leno.hr.dao;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import org.leno.hr.Unit;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
public class UnitDAO extends HibernateDaoSupport {
public int removeRecords(final ArrayList<String> ids) throws Exception {
if (ids == null || ids.size() == 0) {
return -1;
}
getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session) {
for (int i = 0; i < ids.size(); i++) {
session.createQuery(
"delete from Unit o where o.id=" + ids.get(i))
.executeUpdate();
}
return 1;
}
});
return 1;
}
@SuppressWarnings("unchecked")
public List<Unit> getRecords() throws Exception {
return getHibernateTemplate().loadAll(Unit.class);
}
public int insertUnit(Unit unit) throws Exception {
getHibernateTemplate().saveOrUpdate(unit);
return 1;
}
public int updateUnit(Unit unit) throws Exception {
getHibernateTemplate().saveOrUpdate(unit);
return 1;
}
}
上面各个模块的DAO都大同小异了，接下来是Service，只是简单调用DAO做事，并且利用了Spring的声明式事务管理：
package org.leno.hr.service;
import java.util.ArrayList;
import java.util.List;
import org.leno.hr.User;
import org.leno.hr.dao.LogonDAO;
public class LogonService {
private LogonDAO logonDAO;
public LogonDAO getLogonDAO() {
return logonDAO;
}
public void setLogonDAO(LogonDAO logonDAO) {
this.logonDAO = logonDAO;
}
public int removeRecords(ArrayList<String> ids) throws Exception {
return logonDAO.removeRecords(ids);
}
public List<User> getRecords() throws Exception {
return logonDAO.getRecords();
}
public List<User> getUserList(String userName, String passWord)
throws Exception {
return logonDAO.getUserList(userName, passWord);
}
public int insertUser(User user) throws Exception {
return logonDAO.insertUser(user);
}
public int updateUser(User user) throws Exception {
return logonDAO.updateUser(user);
}
}
package org.leno.hr.service;
import java.util.ArrayList;
import java.util.List;
import org.leno.hr.Person;
import org.leno.hr.dao.PersonDAO;
public class PersonService {
private PersonDAO personDAO;
public PersonDAO getPersonDAO() {
return personDAO;
}
public void setPersonDAO(PersonDAO personDAO) {
this.personDAO = personDAO;
}
public int removeRecords(ArrayList<String> ids) throws Exception {
return personDAO.removeRecords(ids);
}
public List<Person> getRecords(int page, int pageSize) throws Exception {
return personDAO.getRecords(page, pageSize);
}
public int insertPerson(Person person) throws Exception {
return personDAO.insertPerson(person);
}
public int updatePerson(Person person) throws Exception {
return personDAO.updatePerson(person);
}
public int getTotalNums() {
return personDAO.getTotalNums();
}
}
package org.leno.hr.service;
import java.util.ArrayList;
import java.util.List;
import org.leno.hr.Unit;
import org.leno.hr.dao.UnitDAO;
public class UnitService {
private UnitDAO unitDAO;
public int removeRecords(ArrayList<String> ids) throws Exception {
return unitDAO.removeRecords(ids);
}
public List<Unit> getRecords() throws Exception {
return unitDAO.getRecords();
}
public UnitDAO getUnitDAO() {
return unitDAO;
}
public void setUnitDAO(UnitDAO unitDAO) {
this.unitDAO = unitDAO;
}
public int insertUnit(Unit unit) throws Exception {
return unitDAO.insertUnit(unit);
}
public int updateUnit(Unit unit) throws Exception{
return unitDAO.updateUnit(unit);
}
}
最后是我们各模块的Spring核心控制类：
package org.leno.hr.controller;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.leno.hr.User;
import org.leno.hr.service.LogonService;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class LogonController implements Controller {
private LogonService logonService;
public LogonService getLogonService() {
return logonService;
}
public void setLogonService(LogonService logonService) {
this.logonService = logonService;
}
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String isUserManagerOperation = request
.getParameter("isUserManagerOperation");
String userName = request.getParameter("userName");
String passWord = request.getParameter("passWord");
if (isUserManagerOperation == null) {
response.setContentType("text/html; charset=UTF-8");
PrintWriter pw = response.getWriter();
if (userName == null || passWord == null || userName.equals("")
|| passWord.equals("")) {
pw.print("用户名或者密码不能为空!");
} else if (userName.indexOf(" ") != -1
|| passWord.indexOf(" ") != -1) {
pw.print("输入无效!");
}
List<User> results = logonService.getUserList(userName, passWord);
if (results.size() == 1) {
User user = (User) results.get(0);
if (user.getIsValid() != 1) {
pw.print("该用户已被锁�?!");
} else {
request.getSession().setAttribute("user", user);
pw.print("success");
}
} else {
pw.print("用户名或者密码不正确!");
}
} else {
String id = request.getParameter("id");
String isValid = request.getParameter("isValid");
int count;
response.setContentType("text/html; charset=UTF-8");
PrintWriter pw = response.getWriter();
User user = new User(userName, passWord, Integer.parseInt(isValid));
if (id == null && userName != null) {
count = logonService.insertUser(user);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
} else if (id != null && userName != null) {
user.setId(Integer.parseInt(id));
count = logonService.updateUser(user);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
}
}
return null;
}
public int removeRecords(ArrayList<String> ids) throws Exception {
return logonService.removeRecords(ids);
}
public List<User> getRecords() throws Exception {
return logonService.getRecords();
}
}
package org.leno.hr.controller;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.leno.hr.Person;
import org.leno.hr.service.PersonService;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class PersonController implements Controller {
private PersonService personService = null;
public int removeRecords(ArrayList<String> ids) throws Exception {
return personService.removeRecords(ids);
}
public PersonService getPersonService() {
return personService;
}
public void setPersonService(PersonService personService) {
this.personService = personService;
}
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String action = request.getParameter("action");
if (action != null) {
response.setCharacterEncoding("utf-8");
//分页实现
String start = request.getParameter("start");
String limit = request.getParameter("limit");
int index = Integer.parseInt(start);
int pageSize = Integer.parseInt(limit);
List<Person> list = personService.getRecords(index, pageSize);
JSONObject json = new JSONObject();
json.put("totalProperty", personService.getTotalNums());
JSONArray arr = JSONArray.fromObject(list);
json.put("root", arr);
System.out.println(json);
response.getWriter().print(json);
return null;
}
String id = request.getParameter("id");
String name = request.getParameter("name");
String age = request.getParameter("age");
String unitName = request.getParameter("unitName");
String address = request.getParameter("address");
String telephone = request.getParameter("telephone");
String gender = request.getParameter("gender");
int count;
response.setContentType("text/html; charset=UTF-8");
PrintWriter pw = response.getWriter();
Person person = new Person(name, age, unitName, address, telephone,
gender);
if (id == null && name != null) {
count = personService.insertPerson(person);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
} else if (id != null && name != null) {
person.setId(Integer.parseInt(id));
count = personService.updatePerson(person);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
}
return null;
}
}
package org.leno.hr.controller;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.leno.hr.Unit;
import org.leno.hr.service.UnitService;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class UnitController implements Controller {
private UnitService unitService = null;
public UnitService getUnitService() {
return unitService;
}
public void setUnitService(UnitService unitService) {
this.unitService = unitService;
}
public int removeRecords(ArrayList<String> ids) throws Exception {
return unitService.removeRecords(ids);
}
public List<Unit> getRecords() throws Exception {
return unitService.getRecords();
}
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String id = request.getParameter("id");
String name = request.getParameter("name");
String description = request.getParameter("description");
String parentId = request.getParameter("parentId");
int count;
response.setContentType("text/html; charset=UTF-8");
PrintWriter pw = response.getWriter();
Unit unit = new Unit(name, description, Integer.parseInt(parentId));
if (id == null && name != null) {
count = unitService.insertUnit(unit);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
} else if (id != null && name != null) {
unit.setId(Integer.parseInt(id));
count = unitService.updateUnit(unit);
if (count == 1) {
pw.print(count);
} else {
pw.print("error");
}
}
return null;
}
}
上面的JAVA代码并不晦涩，熟悉SSH的同志扫一下就清楚了。现在我们的配置文件以及服务器端JAVA代码都做好了，大家可以前后串起来理解一下，下一篇文章我们就开始进行页面设计。