spring3.0 MVC初步4-spring security REST(一)

一、SpEl表达式

1、配置事务时用过一个AspectJ’s pointcut expression language：

pointcut="execution(* *..IUserService.*(..))"
advice-ref="txAdvice"/>

2、配置安全时用SpEl表达式

二、视图层安全元素
<%@ taglib prefix="security" uri="http://www.springframework.org/security/tags" %>

欢迎您：

三、web请求权限控制

四、视图层权限控制

<%@ taglib prefix="security" uri="http://www.springframework.org/security/tags" %>

用户管理

角色管理

单位管理

数据归属管理

五、方法层权限控制

@Secured("ROLE_SPITTER")
public void addSpittle(Spittle spittle) {
// ...
}

六、REST

1、涵义：Representational State Transfer (REST)

REST URL：http://t18:3000/s4/user/4

对照struts2的url：http://t18:3000/s4/LoadUserAction.action user.userId=4

2、控制器能处理所有http请求，包括GET, PUT, DELETE, POST

3、@PathVariable注解使控制器能处理参数化URL

4、spring标签与HeddenHttpMethodFilter过滤器共同协作，使通过普通浏览器就能支持PUT和DELETE方法。

web.xml增加

httpMethodFilter
org.springframework.web.filter.HiddenHttpMethodFilter


httpMethodFilter
/*

a、取数据GET http://t18:3000/s4/user/4
@RequestMapping(value="{userId}", method=RequestMethod.GET)
public String get(@PathVariable("userId") Short userId, Model model){
User u = service.loadUser(userId);
model.addAttribute(u);
return "user/edit";
}

b、显示用来修改PUT

登录名

密码

真实姓名

电话

手机

email

c、修改PUT

@RequestMapping(value="{userId}", method=RequestMethod.PUT)
public String update(@PathVariable Integer userId, @Valid User user){
service.saveUser(user);
return "redirect:/user/page/1";
}

d、删除DELETE

@RequestMapping(value="{userId}", method=RequestMethod.DELETE)
public String delete(@PathVariable("userId") short userId){
User user = service.loadUser(userId);
service.deleteUser(user);
return "redirect:/user/page/1";
}

e、准备添加

@RequestMapping( method=RequestMethod.GET, params="new")
public String prepare(Model model){
model.addAttribute(new User());
return "user/edit";
}

f、添加页面用POST提交，控制器：
@RequestMapping(method=RequestMethod.POST)
public String add(@Valid User user, BindingResult result)
throws BindException{
if(result.hasErrors()){
throw new BindException(result);
}
service.addUser(user);
return "redirect:/user/page/1";
}

七、REST分页

1、分页类
public class Page implements IPageUtil{
private int curPage=1,toPage=1,everyCount=15;
private long pageCount,count;
boolean hasNext,hasPrevious;
private List< > data = new ArrayList();

public Page(){

}

public Page(int toPage, long count, int everyCount, List data){
this.toPage = toPage;
this.count = count;
this.everyCount = everyCount;
this.curPage = getCurPage(count, everyCount);
this.data = data;
}

public int getCurPage(long theCount){
}
public int getCurPage(long theCount,int n){
}
...
}

2、dao支持

public Page findPagedListObject(String hql, int toPage, long count, int everyCount){
Query query = getCurrentSession().createQuery(hql);
if (toPage <= 0) toPage = 1;
int first = (toPage-1) * everyCount;
int max = everyCount;
query.setFirstResult(first+1);
query.setMaxResults(first + max);
List l = query.list();
Page page = new Page(toPage, count, everyCount, l);
return page;
}

3、service支持

public Page listPagedUsers(int toPage, long count, int everyCount){
return dao.findPagedListObject("from User u", toPage, count, everyCount);
}

4、控制器

@RequestMapping(value="/page/{toPage}", method = RequestMethod.GET)
public String list(
@PathVariable