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>

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