Java超详细讲解SpringMVC如何获取请求数据

//http://localhost:8080/project/quick9?username=zhangsan&age=12

@RequestMapping ( "/quick9" )

@ResponseBody

public void quickMethod9(String username, int age) throws IOException {

     System.out.println(username);

     System.out.println(age);

}

//http://localhost:8080/itheima_springmvc1/quick9?username=zhangsan&age=12

public class User {

     private String username;

     private int age;

     getter/setter…

}

@RequestMapping ( "/quick10" )

@ResponseBody

public void quickMethod10(User user) throws IOException {

     System.out.println(user);

}

//http://localhost:8080/project/quick11?strs=111&strs=222&strs=333

@RequestMapping ( "/quick11" )

@ResponseBody

public void quickMethod11(String[] strs) throws IOException {

     System.out.println(Arrays.asList(strs));

}

< form action = "${pageContext.request.contextPath}/quick12" method = "post" >

  < input type = "text" name = "userList[0].username" >< br >

  < input type = "text" name = "userList[0].age" >< br >

  < input type = "text" name = "userList[1].username" >< br >

  < input type = "text" name = "userList[1].age" >< br >

  < input type = "submit" value = "提交" >< br >

</ form >

@RequestMapping ( "/quick12" )

@ResponseBody

public void quickMethod12(Vo vo) throws IOException {

     System.out.println(vo.getUserList());

}

<script>

//模拟数据

var userList = new Array();

userList.push({username: "zhangsan" ,age: "20" });

userList.push({username: "lisi" ,age: "20" });

$.ajax({

type: "POST" ,

url: "/itheima_springmvc1/quick13" ,

data: JSON.stringify(userList),

contentType : 'application/json;charset=utf-8'

});

</script>

@RequestMapping ( "/quick13" )

@ResponseBody

public void quickMethod13( @RequestBody List<User> userList) throws

IOException {

     System.out.println(userList);

}

< mvc:resources mapping = "/js/**" location = "/js/" />

<!--资源过滤器-->

     < filter >

         < filter-name >CharacterEncodingFilter</ filter-name >

         < filter-class >org.springframework.web.filter.CharacterEncodingFilter</ filter-class >

         < init-param >

             < param-name >encoding</ param-name >

             < param-value >UTF-8</ param-value >

         </ init-param >

     </ filter >

     < filter-mapping >

         < filter-name >CharacterEncodingFilter</ filter-name >

         < url-pattern >/*</ url-pattern >

     </ filter-mapping >

< form action = "${pageContext.request.contextPath}/quick14" method = "post" >

  < input type = "text" name = "name" >< br >

  < input type = "submit" value = "提交" >< br >

</ form >

@RequestMapping ( "/quick14" )

@ResponseBody

public void quickMethod14( @RequestParam (value= "name" ,required =

false ,defaultValue = "defaultname" ) String username) throws IOException {

System.out.println(username);

}

//http://localhost:8080/itheima_springmvc1/quick19/zhangsan

@RequestMapping ( "/quick19/{name}" )

@ResponseBody

public void quickMethod19( @PathVariable (value = "name" ,required = true ) String name){

System.out.println(name);

}

public class DateConverter implements Converter<String, Date> {

     @Override

     public Date convert(String source) {

         SimpleDateFormat format= new SimpleDateFormat( "yyyy-MM-dd" );

         Date date = null ;

         try {

             date = format.parse(source);

         } catch (ParseException e) {

             e.printStackTrace();

         }

         return date;

     }

}

<!--配置自定义转换器-->

     < bean id = "conversionService" class = "org.springframework.context.support.ConversionServiceFactoryBean" >

         < property name = "converters" >

             < list >

                 < bean class = "converter.DateConverter" />

             </ list >

         </ property >

     </ bean >

<!--注解驱动-->

    < mvc:annotation-driven conversion-service = "conversionService" />

@RequestMapping ( "/quick17" )

@ResponseBody

public void quickMethod17( @RequestHeader (value = "User-Agent" ,required = false ) String

headerValue){

     System.out.println(headerValue);

}

@RequestMapping ( "/quick18" )

@ResponseBody

public void quickMethod18( @CookieValue (value = "JSESSIONID" ,required = false ) String jsessionid){

     System.out.println(jsessionid);

}

< form action = "${pageContext.request.contextPath}/quick20" method = "post"

enctype = "multipart/form-data" >

名称：< input type = "text" name = "name" >< br >

文件：< input type = "file" name = "file" >< br >

  < input type = "submit" value = "提交" >< br >

</ form >

<!--文件下载-->

     < dependency >

       < groupId >commons-fileupload</ groupId >

       < artifactId >commons-fileupload</ artifactId >

       < version >1.4</ version >

     </ dependency >

     < dependency >

       < groupId >commons-io</ groupId >

       < artifactId >commons-io</ artifactId >

       < version >2.6</ version >

     </ dependency >

< bean id = "multipartResolver" class = "org.springframework.web.multipart测试数据mons.CommonsMultipartResolver" >

         < property name = "defaultEncoding" value = "UTF-8" />

         < property name = "maxUploadSize" value = "500000" />

     </ bean >

@RequestMapping ( "/quick8" )

     @ResponseBody

     public void save8(String name, MultipartFile uploadfile) {

         System.out.println( "save8 running..." );

         System.out.println(name);

         String filename = uploadfile.getOriginalFilename();

         try {

             uploadfile.transferTo( new File( "D:\\upload\\" +filename));

         } catch (IOException e) {

             e.printStackTrace();

         }

     }