Spring MVC REST 例子

package
 com.benx;

import
 java.io.IOException;
import
 java.util.ArrayList;
import
 java.util.HashMap;
import
 java.util.List;
import
 java.util.Map;

import
 javax.servlet.http.HttpServletResponse;

import
 org.springframework.stereotype.Controller;
import
 org.springframework.ui.Model;
import
 org.springframework.web.bind.annotation.ModelAttribute;
import
 org.springframework.web.bind.annotation.PathVariable;
import
 org.springframework.web.bind.annotation.RequestMapping;
import
 org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping
(
"/person"
)
public
 
class
 PersonController {

    PersonService service = new
 PersonService();

    /**
     * 进入登陆页面 http://localhost:8080/person/login 模拟
     *
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/login"
, method = RequestMethod.GET)
    public
 String initLogin(HttpServletResponse response) 
throws
 IOException {

        response.setContentType("text/html;charset=utf-8"
);
        response.getWriter().println("进入登陆页面"
);
        response.flushBuffer();
        return
 
null
;

    }

    /**
     * 登陆 模拟http://localhost:8080/Web/person/login?method=login&name=person1&pass=1
     * 使用@ModelAttribute 把paramter转换为pojo对象 ，也可以使用@RequestParam 获取单个paramter
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/login"
, params = 
"method=login"
, method = RequestMethod.GET)
    public
 String login(
@ModelAttribute
(
"person"
) Person person, Model mode, HttpServletResponse response) 
throws
 IOException {
        response.setContentType("text/html;charset=utf-8"
);

        Person per = service.getPerson(person.getName());

        if
 (per != 
null
 && per.getName().equals(person.getName()) && per.getPass().equals(person.getPass())) {
            response.getWriter().println(per.getName() + "  你好！"
);
        } else
 {
            response.getWriter().println("登陆失败"
);
        }
        response.flushBuffer();

        return
 
null
;
    }

    /**
     * 获取Person详细信息 http://localhost:8080/Web/person/person1 模拟
     *
     * @param name
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/{name}"
, method = RequestMethod.GET)
    public
 String getPerson(
@PathVariable
 String name, Model mode, HttpServletResponse response) 
throws
 IOException {

        response.setContentType("text/html;charset=utf-8"
);

        Person per = service.getPerson(name);

        if
 (per != 
null
) {
            response.getWriter().println("用户："
 + per.getName());
            response.getWriter().println("用户密码："
 + per.getPass());
        } else
 {
            response.getWriter().println("没找到用户"
);
        }

        return
 
null
;
    }

    /**
     * 进入新增Person页面 http://localhost:8080/Web/person/addPerson
     *
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/addPerson"
, method = RequestMethod.GET)
    public
 String initAddPerson(HttpServletResponse response) 
throws
 IOException {

        response.setContentType("text/html;charset=utf-8"
);

        response.getWriter().println("进入新增页面"
);

        return
 
null
;

    }

    /**
     * 新增Person http://localhost:8080/Web/person/addPerson?method=add&name=person11&pass=1
     *
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/addPerson"
, params = 
"method=add"
, method = RequestMethod.GET)
    public
 String addPerson(
@ModelAttribute
(
"person"
) Person person, HttpServletResponse response) 
throws
 IOException {
        response.setContentType("text/html;charset=utf-8"
);

        service.addPerson(person);

        response.getWriter().println("新增成功"
);
        response.getWriter().println("用户："
 + person.getName());
        response.getWriter().println("用户密码："
 + person.getPass());
        response.flushBuffer();

        return
 
null
;
    }

    /**
     * 删除Perseon
     * http://localhost:8080/Web/person/person1/delete
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/{name}/delete"
, method = RequestMethod.GET)
    public
 String deletePerson(
@PathVariable
(
"name"
) String name,Model mode, HttpServletResponse response) 
throws
 IOException {
        response.setContentType("text/html;charset=utf-8"
);

        service.deletePerson(name);

        response.getWriter().println("删除成功"
 + name);
        response.flushBuffer();
        return
 
null
;

    }
    /**
     * mapTest
     * http://localhost:8080/Web/person/maptest
     * @param mode
     * @return
     * @throws IOException
     */
    @RequestMapping
(value = 
"/maptest"
, method = RequestMethod.GET)
    @ResponseBody
    public
 Map<String, Object> mapTest(HttpServletResponse response) 
throws
 IOException {
        System.out.println("HHHHHHHHHH"
);
       /* response.setContentType("text/html;charset=utf-8");  */

        Person per = new
 Person();
        per.setName("xiogjin"
);
        per.setPass("123456"
);

        List list = new
 ArrayList();
        list.add("1"
);
        list.add("2"
);
        list.add("3"
);

        Map<String, Object> map = new
 HashMap<String, Object>();
        map.put("str"
, 
"xiongjin"
);
        map.put("object"
, per);
        map.put("object"
, per);
        map.put("list"
, list);
        return
 map;


        /**
         * 下面的例子将打印{"str":"xiongjin","list":["1","2","3"],"object":{"name":"xiogjin","pass":"123456"}}
         * 通过如下方式可以读取
         * var ob = {"str":"xiongjin","list":["1","2","3"],"object":{"name":"xiogjin","pass":"123456"}};
          alert(ob.str);
          alert(ob.list)
          alert(ob.list[0])
          alert(ob.list[1])
          alert(ob.list[2])
          alert(ob.object.name)
          alert(ob.object.pass)
         */
    }
}

class
 Person {
    private
 String name;
    private
 String pass;


    public
 Person() {
        super
();
    }


    public
 Person(String name, String pass) {
        super
();
        this
.name = name;
        this
.pass = pass;
    }

    public
 String getName() {
        return
 name;
    }

    public
 
void
 setName(String name) {
        this
.name = name;
    }

    public
 String getPass() {
        return
 pass;
    }

    public
 
void
 setPass(String pass) {
        this
.pass = pass;
    }

    @Override
    public
 String toString() {
        return
 
"Person [name="
 + name + 
", pass="
 + pass + 
"]"
;
    }


}

class
 PersonService {
    static
 Map<String, Person> persons = 
new
 HashMap<String, Person>();

    public
 PersonService() {
        for
 (
int
 i = 
0
; i < 
10
; i++) {
            persons.put("person"
 + i, 
new
 Person(
"person"
 + i, 
""
 + i));
        }
    }

    public
 Person getPerson(String name) {
        return
 persons.get(name);
    }

    public
 List<Person> getPersons(String name) {
        return
 
new
 ArrayList<Person>(persons.values());
    }

    public
 
void
 addPerson(Person per) {
        persons.put(per.getName(), per);
    }

    public
 
void
 deletePerson(String name) {
        persons.remove(name);
    }

}

 

 

 

web.xml

 

 

<?xml version=
"1.0"
 encoding=
"UTF-8"
?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns=
"http://java.sun.com/xml/ns/javaee"
 xmlns:web=
"http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
 xsi:schemaLocation=
"http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
 id=
"WebApp_ID"
 version=
"2.5"
>
  <display-name>SpringMVC</display-name>
  <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class
>org.springframework.web.servlet.DispatcherServlet</servlet-
class
>
        <load-on-startup>1
</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

 

spring-servlent.xml

 

<?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:p=
"http://www.springframework.org/schema/p"
    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.xsd">


    <bean id="viewResolver"
        class
=
"org.springframework.web.servlet.view.InternalResourceViewResolver"
        p:prefix="/WEB-INF/jsp/"
 p:suffix=
".jsp"
 />


    <context:component-scan base-package
=
"com.benx"
 />

    <bean class
=
"org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"
 />
         //支持json
    <bean class
=
"org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"
>
        <property name="messageConverters"
>
            <list>
                <bean class
=
"org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"
></bean>
            </list>
        </property>
    </bean>
</beans>