SpringMVC案例3----spring3.0项目拦截器、ajax、文件上传应用

依然是项目结构图和所需jar包图：

显示配置文件hib-config.xml

再是springmvc-servlet.xml




web.xml
dao层的userDao


package com.sxt.dao;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

import com.sxt.po.User;
@Repository("userDao")
public class UserDao {
	@Autowired
	private HibernateTemplate hibernateTemplate ;
	
	public void add(User u){
		System.out.println("userDao.add()");
		hibernateTemplate.save(u) ;
	}
	
}



模型层的user类


package com.sxt.po;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {
	private int id ;
	private String name ;
	private String pwd ;
	public User(){}
	public User(String name,String pwd){
		this.name = name ;
		this.pwd = pwd ;
	}
	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPwd() {
		return pwd;
	}
	public void setPwd(String pwd) {
		this.pwd = pwd;
	}
	
	
}



service层的userService类
package com.sxt.service;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.sxt.dao.UserDao;
import com.sxt.po.User;
@Service("userService")
public class UserService {
	@Autowired
	private UserDao userDao ;
	public void add(String name){
		System.out.println("UserService.add()");
		User u = new User() ;
		u.setName(name) ;
		userDao.add(u) ;
	}
	
}
controller层的userController类


package com.sxt.action;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.SessionAttributes;

import com.sxt.service.UserService;
@org.springframework.stereotype.Controller("userController")
@RequestMapping("/user.do")
@SessionAttributes({"uname"})
public class UserController{
	@Autowired
	private UserService userService ;
	@RequestMapping(params="method=reg")
	public String reg(String uname){
		System.out.println("UserController.reg()");
		userService.add(uname) ;
		return "index" ;
	}
	@RequestMapping(params="method=reg2")
	public String reg2(@RequestParam("uname")String name,ModelMap map){
		System.out.println("UserController.reg2()");
		userService.add(name) ;
		map.put("b", "bbb") ;
		return "index" ;
	}
	@RequestMapping(params="method=reg3")
	public String reg3(String uname,ModelMap map){
		System.out.println("UserController.reg3()");
		userService.add(uname) ;
		System.out.println(uname);
		map.put("uname", uname) ;
		return "index" ;
	}
	@RequestMapping(params="method=reg4")
	public String reg4(String uname,ModelMap map){
		System.out.println("UserController.reg4()");
//		return "forward:user.do?
method=reg3" ;    //转发，不写默认就是转发
		return "redirect:http://www.baidu.com" ;//重定向
	}
	@RequestMapping(params="method=reg5")
	public String reg5(String uname){
		System.out.println("UserController.reg4()");
		return "redirect:http://www.baidu.com" ;//重定向
	}
	
}



MyAjaxController类


package com.sxt.action;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.sxt.po.User;
@Controller
@RequestMapping("myajax.do")
public class MyAjaxController {
	@RequestMapping(params="method=test2",method=RequestMethod.GET)
	public @ResponseBody List<User> test1(String uname) throws Exception{
		String uname2 = new String(uname.getBytes("iso8859-1"),"utf-8") ;
		System.out.println(uname2);
		System.out.println("MyAjaxController.test1()");
		List<User> list = new ArrayList<User>() ;
		list.add(new User("吴海旭","123")) ;
		list.add(new User("韩敬琼","456")) ;
		System.out.println(list.size());
		return list ;
	}
}



FileUoLoadController类


package com.sxt.action;

import java.io.File;
import java.util.Date;

import javax.servlet.ServletContext;

import org.apache.log4j.chainsaw.Main;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.context.ServletContextAware;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
@Controller("fileUpLoadController")
public class FileUpLoadController implements ServletContextAware{
	private ServletContext servletContext ;
	@Override
	public void setServletContext(ServletContext servletContext) {
		// TODO Auto-generated method stub
		this.servletContext = servletContext ;
	}
	@RequestMapping(value="/upload.do",method=RequestMethod.POST)
	public String handleUploadData(String name,@RequestParam("file")CommonsMultipartFile file){
		if(!file.isEmpty()){
			//获取本地存储路径，必须在项目下建立一个这种路径
			String path = this.servletContext.getRealPath("/upload/") ;
			System.out.println(path);
			//获取文件名
			String fileName = file.getOriginalFilename() ;
			//获取文件后缀名
			String fileType = fileName.substring(fileName.lastIndexOf(".")) ;
			System.out.println(fileType);
			File file2 = new File(path,new Date().getTime()+fileType) ;
			try {
				file.getFileItem().write(file2) ;
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return "redirect:upload_ok.jsp" ;
		}else{
			return "redirect:upload_error.jsp" ;
		}
	}
}



拦截器层的MyInterceptor类


package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor implements HandlerInterceptor{

	@Override
	public void afterCompletion(HttpServletRequest arg0,
			HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		// TODO Auto-generated method stub
		System.out.println("最后运行，一般用于释放资源！！！");
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2, ModelAndView arg3) throws Exception {
		// TODO Auto-generated method stub
		System.out.println("action运行之后，生成视图之前！。");
	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2) throws Exception {
		// TODO Auto-generated method stub
		System.out.println("action之前运行");
		return true;
	}

}



MyInterceptor2类


package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

public class MyInterceptor2 extends HandlerInterceptorAdapter{
	@Override
	public boolean preHandle(HttpServletRequest request,
			HttpServletResponse response, Object handler) throws Exception {
		// TODO Auto-generated method stub
		System.out.println("MyInterceptor2.preHandle()");
		return true;
	}
}


用于測试ajax的a.jsp文件




index.jsp




index2.jsp




upload_error.jsp




upload_ok.jsp


</h1>
  </body>
</html>



upload.jsp




至此整个springmvc重要的东西測试完成！