1.springmvc（注解版本）
注解扫描
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!--让spring容器去扫描注释-->
<context:component-scan base-package="com.juaner.app14"/> <!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
Action类
@Controller
public class HelloAction {
public HelloAction(){
System.out.println(this .hashCode() );
}
@RequestMapping(value = "/hello.action")
public String hello(Model model)throws Exception{
System.out.println("hello");
model.addAttribute("message","this is the first....");
return "success";
} @RequestMapping(value = "/bye.action")
public String bye(Model model)throws Exception{
System.out.println("bye");
model.addAttribute("message","bye");
return "success";
}
}
2.一个Action中，写多个类似的业务控制方法
@Controller
@RequestMapping(value="/user")
public class UserAction { @RequestMapping(value = "/register")
public String register(Model model)throws Exception{
model.addAttribute("message","注册成功");
return "/jsp/success.jsp";
}
@RequestMapping(value = "/login")
public String login(Model model)throws Exception{
model.addAttribute("message","登录成功");
return "/jsp/success.jsp";
}
}
3.在业务控制方法中写入普通变量收集参数，限定某个业务控制方法，只允许GET或POST请求方式访问
@Controller
@RequestMapping(value="/user")
public class UserAction { @RequestMapping(method= RequestMethod.POST,value = "/register")
public String register(Model model,String username,double salary)throws Exception{
System.out.println(username+salary);
model.addAttribute("message","注册成功");
return "/jsp/success.jsp";
}
@RequestMapping(value = "/login", method= {RequestMethod.POST,RequestMethod.GET})
public String login(Model model,String username,double salary)throws Exception{
System.out.println(username+salary);
model.addAttribute("message","登录成功");
return "/jsp/success.jsp";
}
}
4.在业务控制方法中写入HttpServletRequest，HttpServletResponse，Model等传统web参数
@Controller
@RequestMapping(value="/user")
public class UserAction { @RequestMapping(method= RequestMethod.POST,value = "/register" )
public void register(HttpServletRequest request, HttpServletResponse response)throws Exception{
String username = request.getParameter("username");
String salary = request.getParameter("salary"); System.out.println(username+salary);
request.setAttribute("message","转发参数");
// response.sendRedirect(request.getContextPath()+"/jsp/success.jsp");
request.getRequestDispatcher("/jsp/success.jsp").forward(request,response);
}
}
5.在业务控制方法中写入模型变量收集参数，且使用@InitBind来解决字符串转日期类型
jsp中的元素name属性不用加user.前缀
@Controller
@RequestMapping(value="/user")
public class UserAction { @InitBinder
protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception {
//向springmvc中注册一个自定义的类型转换器
//参数一：将string转成什么类型的字节码
//参数二：自定义转换规则
binder.registerCustomEditor(Date.class,
new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));
}
@RequestMapping(method= RequestMethod.POST,value = "/register" )
public String register(User user, Model model)throws Exception{
System.out.println("用户注册");
model.addAttribute("user",user);
System.out.println(new Timestamp(user.getHiredate().getTime())); return "/jsp/success.jsp";
}
}
在业务控制方法中写入User，Admin多个模型收集参数，需要更大的模型包装User，Admin
6.在业务控制方法中收集数组参数
@Controller
@RequestMapping(value = "/emp")
public class EmpAction {
@RequestMapping(value = "/deleteAll",method = RequestMethod.POST)
public String deleteAll(Model model,int[] id)throws Exception{
for(int i:id)
{
System.out.println(i);
}
model.addAttribute("message","批量删除员工成功");
return "/jsp/success.jsp";
}
}
jsp
<form action="${pageContext.request.contextPath}/emp/deleteAll.action" method="post">
<table>
<tr><th>
编号
</th><th>
姓名
</th></tr>
<tr>
<td>
<input type="checkbox" name="id" value="1123">
</td>
<td>哈哈</td>
</tr>
<tr>
<td>
<input type="checkbox" name="id" value="2123">
</td>
<td>嘻嘻</td>
</tr>
<tr>
<td>
<input type="checkbox" name="id" value="3">
</td>
<td>呵呵</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="提交">
</td>
</tr>
</table>
</form>7.在业务控制方法中收集List<JavaBean>参数
bean
public class Bean {
private List<Emp> empList = new ArrayList<Emp>();
public Bean(){}
public List<Emp> getEmpList() {
return empList;
}
public void setEmpList(List<Emp> empList) {
this.empList = empList;
}
}action
@Controller
@RequestMapping(value = "/emp")
public class EmpAction {
@RequestMapping(value = "/addAll",method = RequestMethod.POST)
public String addAll(Model model,Bean bean)throws Exception{
for(Emp emp:bean.getEmpList())
{
System.out.println(emp);
}
model.addAttribute("message","批量添加员工成功");
return "/jsp/success.jsp";
}
}
jsp
<form action="${pageContext.request.contextPath}/emp/addAll.action" method="post">
<table>
<tr>
<td><input name="empList[0].username" type="text" value="哈哈"></td>
<td><input name="empList[0].salary" type="text" value="6000"></td>
</tr>
<tr>
<td><input name="empList[1].username" type="text" value="呵呵"></td>
<td><input name="empList[1].salary" type="text" value="7000"></td>
</tr>
<tr>
<td><input name="empList[2].username" type="text" value="嘻嘻"></td>
<td><input name="empList[2].salary" type="text" value="8000"></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="注册"></td>
</tr>
</table>
</form>8.结果的转发和重定向
@Controller
@RequestMapping(value="/emp")
public class EmpAction { @RequestMapping(value="/find")
public String findEmpById(int id,Model model) throws Exception{
System.out.println("查询"+id+"号员工信息"); //转发到EmpAction的另一个方法中去，即再次发送请求
return "forward:/emp/update.action"; //重定向到EmpAction的另一个方法中去，即再次发送请求
//return "redirect:/emp/update.action?id=" + id; } @RequestMapping(value="/update")
public String updateEmpById(int id,Model model) throws Exception{
System.out.println("更新" + id +"号员工信息");
model.addAttribute("message","更新员工信息成功");
return "/jsp/ok.jsp";
} }
9.异步发送表单数据到JavaBean，并响应JSON文本返回
1.导入包jackson-core-asl-1.9.11、jackson-mapper-asl-1.9.11
2.配置json转换器
<!--json转换器-->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
</list>
</property>
</bean>
3.方法名中加注解
/**
* @ResponseBody Emp 表示让springmvc将Emp对象转成json文本
*/
@RequestMapping(value="/bean2json")
public @ResponseBody Emp bean2json() throws Exception{
//创建Emp对象
Emp emp = new Emp();
emp.setId(1);
emp.setUsername("哈哈");
emp.setSalary(7000D);
emp.setHiredate(new Date());
return emp;
} @RequestMapping(value="/listbean2json")
public @ResponseBody List<Emp> listbean2json() throws Exception{
//创建List对象
List<Emp> empList = new ArrayList<Emp>();
//向List对象中添加三个Emp对象
empList.add(new Emp(1,"哈哈",7000D,new Date()));
empList.add(new Emp(2,"呵呵",8000D,new Date()));
empList.add(new Emp(3,"嘻嘻",9000D,new Date()));
//返回需要转JSON文本的对象
return empList;
} @RequestMapping(value="/map2json")
public @ResponseBody Map<String,Object> map2json() throws Exception{
//创建List对象
List<Emp> empList = new ArrayList<Emp>();
//向List对象中添加三个Emp对象
empList.add(new Emp(1,"哈哈",7000D,new Date()));
empList.add(new Emp(2,"呵呵",8000D,new Date()));
empList.add(new Emp(3,"嘻嘻",9000D,new Date()));
//创建Map对象
Map<String,Object> map = new LinkedHashMap<String,Object>();
//向Map对象中绑定二个变量
map.put("total",empList.size());
map.put("rows",empList);
//返回需要转JSON文本的对象
return map;
}