1、直接使用方法的参数逐个接收
参数名称前端和后端一一对应
// 1:直接使用方法的参数逐个接收 要求:参数的名称必须与请求中携带的参数名称一致
// 优势:不需要类型转换,前后端类型直接对应
@RequestMapping("test01")
public ModelAndView test01(Integer teamId, String teamName, String teamLocation) {
System.out.println("teamId: " + teamId + " teamName: " + teamName + " teamLocation: " + teamLocation);
return new ModelAndView("OK");
}
<h3>1、直接使用方法的参数逐个接收</h3>
<form action="/param/test01" method="post">
球队ID:<input name="teamId"/><br>
球队name:<input name="teamName"/><br>
球队location:<input name="teamLocation"/><br>
<button type="submit">提交</button>
</form>
2、用对象接收多个参数
要求:请求中携带的参数必须域对象属性名一致
<h3>2、使用对象接收多个参数</h3>
<form action="/param/test02" method="post">
球队ID:<input name="teamId"/><br>
球队name:<input name="teamName"/><br>
球队location:<input name="location"/><br>
<button type="submit">提交</button>
</form>
public class Team {
private Integer teamId;
private String teamName;
private String location;
}
@RequestMapping("test02")
public ModelAndView test02(Team team) {
System.out.println(team);
return new ModelAndView("OK");
}
3、请求参数和方法参数名称不一致
请求参数和方法名称的参数不一致 使用注解@RequestParam(value"请求中的名称")
required: 表示参数是否是必须的,true:没有则报错 false;没有该参数则报错
defaultValue: 表示参数为空时的默认值
<h3>3、请求参数和方法名称的参数不一致</h3>
<form action="/param/test03" method="post">
球队ID:<input name="teamId"/><br>
球队name:<input name="teamName"/><br>
球队location:<input name="location"/><br>
<button type="submit">提交</button>
</form>
@RequestMapping("test03")
public ModelAndView test03(@RequestParam(value = "teamId", required = false, defaultValue = "0") Integer id,
@RequestParam(value = "teamName") String name,
@RequestParam(value = "location") String location) {
System.out.println("teamId: " + id + " teamName: " + name + " location: " + location);
return new ModelAndView("OK");
}
4、使用HttpServletRequest对象获取参数
跟javaweb中是一样的,因为Springmvc框架的底层是由servlet实现的
<h3>4、使用HttpServletRequest获取参数</h3>
<form action="/param/test04" method="post">
球队ID:<input name="teamId"/><br>
球队name:<input name="teamName"/><br>
球队location:<input name="location"/><br>
<button type="submit">提交</button>
</form>
@RequestMapping("test04")
public ModelAndView test04(HttpServletRequest req) {
String teamName = req.getParameter("teamName");
String id = req.getParameter("teamId");
String location = req.getParameter("location");
System.out.println("teamName: " + teamName + " id: " + id + " location: " + location);
return new ModelAndView("OK");
}
5、使用url地址传参
@RequestMapping("test05/{id}/{name}/{loc}")
public ModelAndView test05(@PathVariable("id") Integer id, @PathVariable("name") String name, @PathVariable("loc") String loc) {
System.out.println("teamId: " + id + " teamName: " + name + " location: " + loc);
return new ModelAndView("OK");
}
6、获取日期类型参数
对象类型中的日期属性上需要添加注解@DateFormat(pattern = "yyyy-MM-dd"),通过pattern参数来修改日期的格式
<h3>6、获取日期类型的参数</h3>
<form action="/param/test06" method="post">
球队ID:<input name="teamId"/><br>
球队name:<input name="teamName"/><br>
球队location:<input name="location"/><br>
球队date:<input name="date"/><br>
<button type="submit">提交</button>
</form>
public class Team {
private Integer teamId;
private String teamName;
private String location;
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date date;
}
@RequestMapping("test06")
public ModelAndView test06(Team team) {
System.out.println(team);
return new ModelAndView("OK");
}
7、获取数组类型参数
<h3>7、获取数组类型的参数</h3>
<form action="/param/test07" method="post">
球队name1:<input name="teamName"/><br>
球队name2:<input name="teamName"/><br>
球队name3:<input name="teamName"/><br>
球队name4:<input name="teamName"/><br>
<button type="submit">提交</button>
</form>
@RequestMapping("test07")
public ModelAndView test07(String[] teamName, HttpServletRequest req) {
// 方式1
for(String i : teamName) {
System.out.println(i);
}
System.out.println("-----");
// 方式2
String[] teamNames = req.getParameterValues("teamName");
for(String i : teamNames) {
System.out.println(i);
}
return new ModelAndView("OK");
}
8、获取集合类型参数
简单类型的可以通过@RequestParam注解实现;对象集合不支持直接获取,必须封装在类中,作为一个属性操作
<form action="/param/test09" method="post">
球队id1:<input type="text" name="teamList[0].teamId"/><br/>
球队id2:<input type="text" name="teamList[1].teamId"/><br/>
球队id3:<input type="text" name="teamList[2].teamId"/><br/>
球队名称1:<input type="text" name="teamList[0].teamName"/><br/>
球队名称2:<input type="text" name="teamList[1].teamName"/><br/>
球队名称3:<input type="text" name="teamList[2].teamName"/><br/>
<button type="submit">提交</button>
</form>
@RequestMapping("test08")
public ModelAndView test08(@RequestParam("teamName") List<String> nameList){
System.out.println("test08-----------------");
for (String s : nameList) {
System.out.println(s);
}
return new ModelAndView("ok");
}