spring mvc controller接收请求值及controller之间跳转及传值
2015-10-12 10:41
531 查看
Spring接收请求参数:
1,使用HttpServletRequest获取
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(HttpServletRequest request){
String name = request.getParameter("name")
String pass = request.getParameter("pass")
}
2,Spring会自动将表单参数注入到方法参数,和表单的name属性保持一致。和Struts2一样
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public String login(HttpServletRequest request,
String name,
@RequestParam("pass")String password) // 表单属性是pass,用变量password接收
{
log.info(name);
log.info(password)
}
3,自动注入Bean属性
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
<form action="login">
用户名:<input name="name"/>
密码:<input name="pass"/>
<input type="submit" value="登陆">
</form>
//封装的User类
public class User{
private String name;
private String pass;
}
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public String login(User user)
{
log.info(user.getName());
log.info(user.getPass());
}
向页面传值:
当Controller组件处理后,向jsp页面传值,
1,使用HttpServletRequest 和 Session 然后setAttribute(),就和Servlet中一样
2,使用ModelAndView对象
3,使用ModelMap对象
4,使用@ModelAttribute注解
Model数据会利用HttpServletRequest的Attribute传值到success.jsp中
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public ModelAndView login(String name,String pass){
User user = userService.login(name,pwd);
Map<String,Object> data = new HashMap<String,Object>();
data.put("user",user);
return new ModelAndView("success",data);
}
使用ModelMap参数对象示例:
ModelMap数据会利用HttpServletRequest的Attribute传值到success.jsp中
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(String name,String pass ,ModelMap model){
User user = userService.login(name,pwd);
model.addAttribute("user",user);
model.put("name",name);
return "success";
}
使用@ModelAttribute示例
在Controller方法的参数部分或Bean属性方法上使用
@ModelAttribute数据会利用HttpServletRequest的Attribute传值到success.jsp中
ModelMap对象的 addAttribute,put两个方法有什么区别就是 addAttribute是不允许添加空值的key,put是允许的
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(@ModelAttribute("user") User user){
//TODO
return "success";
}
@ModelAttribute("name")
public String getName(){
return name;
}
Session存储:
可以利用HttpServletReequest的getSession()方法
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(String name,String pwd
ModelMap model,HttpServletRequest request){
User user = serService.login(name,pwd);
HttpSession session = request.getSession();
session.setAttribute("user",user);
model.addAttribute("user",user);
return "success";
}
Spring MVC contorller跳转到另一个controller并传值
示例均从[b]createOrderForOld跳转到[/b]createOrder
1: forward 请求转发
@RequestMapping(value ="/createOrderForOld")
public String createOrder(HttpServletRequest request,ModelMapmodel) {
return"forward:/createOrder";
}
@RequestMapping(value ="/createOrder")
public String createOrder(String oderId,String orderName,ModelMap model) {
return"index;
}
forward跳转,是请求转发,参数自动跳转,所以当http://localhost:8080/my-app/createOrderForOld?orderId=123 该链接请求createOrderForOld接口后 请求转发到createOrder接口时,参数自动带过来了,createOrder中oderId自动赋值为“123”,参数名称需一致,否则无法传参赋值。
2: redirect 重定向
@RequestMapping(value ="/createOrderForOld")
public String createOrder(HttpServletRequest request,ModelMap model) {
model.put("orderName","newOld");
return"redirect:/createOrder?orderId=123";
}
@RequestMapping(value ="/createOrder")
public String createOrder(String
oderId,String orderName,ModelMap model) {
return"index";
}
当请求http://localhost:8080/my-app/createOrderForOld 链接请求createOrderForOld接口后 请求重定向到createOrder接口时,通过model.put方法 ,createOrder中oderName自动赋值为“newOld”,通过参数拼接orderId自动赋值为“123”。
故redirect跳转到另一个controller是通过model还是拼接url均可。参数名称需一致,否则无法传参赋值。
RedirectAttributes和ModelMap或Model不推荐一起使用,因为在redirect传值时,同时存在,只有RedirectAttributes中参数值被传递,ModelMap或Model中变量不会传递。
1,使用HttpServletRequest获取
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(HttpServletRequest request){
String name = request.getParameter("name")
String pass = request.getParameter("pass")
}
2,Spring会自动将表单参数注入到方法参数,和表单的name属性保持一致。和Struts2一样
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public String login(HttpServletRequest request,
String name,
@RequestParam("pass")String password) // 表单属性是pass,用变量password接收
{
log.info(name);
log.info(password)
}
3,自动注入Bean属性
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
<form action="login">
用户名:<input name="name"/>
密码:<input name="pass"/>
<input type="submit" value="登陆">
</form>
//封装的User类
public class User{
private String name;
private String pass;
}
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public String login(User user)
{
log.info(user.getName());
log.info(user.getPass());
}
向页面传值:
当Controller组件处理后,向jsp页面传值,
1,使用HttpServletRequest 和 Session 然后setAttribute(),就和Servlet中一样
2,使用ModelAndView对象
3,使用ModelMap对象
4,使用@ModelAttribute注解
Model数据会利用HttpServletRequest的Attribute传值到success.jsp中
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login")
public ModelAndView login(String name,String pass){
User user = userService.login(name,pwd);
Map<String,Object> data = new HashMap<String,Object>();
data.put("user",user);
return new ModelAndView("success",data);
}
使用ModelMap参数对象示例:
ModelMap数据会利用HttpServletRequest的Attribute传值到success.jsp中
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(String name,String pass ,ModelMap model){
User user = userService.login(name,pwd);
model.addAttribute("user",user);
model.put("name",name);
return "success";
}
使用@ModelAttribute示例
在Controller方法的参数部分或Bean属性方法上使用
@ModelAttribute数据会利用HttpServletRequest的Attribute传值到success.jsp中
ModelMap对象的 addAttribute,put两个方法有什么区别就是 addAttribute是不允许添加空值的key,put是允许的
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(@ModelAttribute("user") User user){
//TODO
return "success";
}
@ModelAttribute("name")
public String getName(){
return name;
}
Session存储:
可以利用HttpServletReequest的getSession()方法
Java代码
![](https://oscdn.geek-share.com/Uploads/Images/Content/201510/88a9b9f5ed952eb7fe2ed48b0dbb44f4.png)
@RequestMapping("/login.do")
public String login(String name,String pwd
ModelMap model,HttpServletRequest request){
User user = serService.login(name,pwd);
HttpSession session = request.getSession();
session.setAttribute("user",user);
model.addAttribute("user",user);
return "success";
}
Spring MVC contorller跳转到另一个controller并传值
示例均从[b]createOrderForOld跳转到[/b]createOrder
1: forward 请求转发
@RequestMapping(value ="/createOrderForOld")
public String createOrder(HttpServletRequest request,ModelMapmodel) {
return"forward:/createOrder";
}
@RequestMapping(value ="/createOrder")
public String createOrder(String oderId,String orderName,ModelMap model) {
return"index;
}
forward跳转,是请求转发,参数自动跳转,所以当http://localhost:8080/my-app/createOrderForOld?orderId=123 该链接请求createOrderForOld接口后 请求转发到createOrder接口时,参数自动带过来了,createOrder中oderId自动赋值为“123”,参数名称需一致,否则无法传参赋值。
2: redirect 重定向
@RequestMapping(value ="/createOrderForOld")
public String createOrder(HttpServletRequest request,ModelMap model) {
model.put("orderName","newOld");
return"redirect:/createOrder?orderId=123";
}
@RequestMapping(value ="/createOrder")
public String createOrder(String
oderId,String orderName,ModelMap model) {
return"index";
}
当请求http://localhost:8080/my-app/createOrderForOld 链接请求createOrderForOld接口后 请求重定向到createOrder接口时,通过model.put方法 ,createOrder中oderName自动赋值为“newOld”,通过参数拼接orderId自动赋值为“123”。
故redirect跳转到另一个controller是通过model还是拼接url均可。参数名称需一致,否则无法传参赋值。
RedirectAttributes和ModelMap或Model不推荐一起使用,因为在redirect传值时,同时存在,只有RedirectAttributes中参数值被传递,ModelMap或Model中变量不会传递。
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