SpringMvc获取参数和向前台传值及参数中文乱码

一、springMvc获取参数的三种方法

/**
* 使用HttpServletRequest获取
*/
@RequestMapping("/login1")
public String login1(HttpServletRequest request,Model model){
model.addAttribute("name", request.getParameter("name"));
model.addAttribute("password", request.getParameter("password"));
return "success";
}

/**
* spring自动将表单参数注入到方法参数,参数值和页面name属性一致时可以省去@RequestParam注解
*/
@RequestMapping("/login2")
public String login2(@RequestParam("name") String name, String password,Model model){
model.addAttribute("name", name);
model.addAttribute("password", password);
return "success";
}

/**
* 自动注入bean属性
*/
@RequestMapping("/login3")
public String login3(User user,Model model){
model.addAttribute("name", user.getName());
model.addAttribute("password", user.getPassword());
return "success";
}

二、springMvc向前台传值的两种方法

@RequestMapping("/login2")
public String login2(@RequestParam("name") String name, String password,Model model){
model.addAttribute("name", name);
model.addAttribute("password", password);
return "success";
}

return "success";
}

@RequestMapping("/login4")
public String login4(User user, Map<String, Object> map){
map.put("name", user.getName());
map.put("password", user.getPassword());
return "success";
}

三、参数中文乱码的两种处理方式

例如传递过来的name属性是中文

@RequestMapping("/login2")
public String login2(@RequestParam("name") String name, String password,Model model){
model.addAttribute("name", name);
model.addAttribute("password", password);
return "success";
}

1、修改tomcat默认编码（ISO-8859-1）方法，修改tomcat根目录的conf下的server.xml,Connector元素添加URIEncoding=”UTF-8”属性，如下所示：

<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" URIEncoding="UTF-8" redirectPort="8443"/>

2、new String(info.getBytes("iso-8859-1"),"UTF-8");