SpringMVC的其他功能使用

一、SpringMVC支持在控制器的业务方法中写入参数作为传递过来的变量

@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(value="/hello.action")
    public String hello(Model model,String name,double number){
        model.addAttribute("Message",name+"|"+String.valueOf(number));
        return "success";
    }
}

二、SpringMVC支持限定某个业务控制方法，只允许GET或POST请求方式访问

@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(method={RequestMethod.POST,RequestMethod.GET},value="/hello.action")
    public String hello(Model model){
        model.addAttribute("Message","hello");
        return "success";
    }
    
    @RequestMapping(method=RequestMethod.GET,value="/goodbye.action")
    public String goodbye(Model model){
        model.addAttribute("Message","goodbye");
        return "success";
    }
}

三、SpringMVC支持在业务控制方法中写入Request，Response等传统web参数

package com.jyk.springmvc.httpRequestResponse;

import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.support.RequestContext;

/**
 * SpringMVC支持web传统方式httpRequest和httpResponse获取参数（建议用model）
 * 也支持void类型的业务方法
 * @author fat
 */
@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(method={RequestMethod.POST,RequestMethod.GET},value="/hello.action")
    public void hello(HttpServletRequest request,HttpServletResponse response) throws IOException{
        String name = request.getParameter("name");
        String number = request.getParameter("number");
        System.out.println(name+"："+number);
        
        //绑定到session域中
        request.getSession().setAttribute("name",name);
        request.getSession().setAttribute("number",number);
        
        //页面重定向
        response.sendRedirect(request.getContextPath()+"/success.jsp");
    }
}

四、在默认情况下，springmvc不能将String类型转成java.util.Date类型,需要使用@InitBind来解决字符串转日期类型，同时支持在参数中传递多个实体类，如下代码中Bean对象包含了Person和Animal对象

/**
 * 日期格式转换，和多个实体类型接收参数
 * @author fat
 */
@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
        
    /**
     * 自定义类型转换器
     * @param request
     * @param binder
     * @throws Exception
     */
    @InitBinder
    protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder)
            throws Exception{
        binder.registerCustomEditor(Date.class, new CustomDateEditor
                (new SimpleDateFormat("yyyy-MM-dd"), true));
    }
    
    @RequestMapping(value="/hello.action")
    public String hello(Model model,Person person){
        System.out.println(person.toString());
        model.addAttribute("person",person);
        return "success";
    }
    
    /**
     * 参数中传多个实体类时
     * @param model
     * @param person
     * @return
     */
    @RequestMapping(value="/entities.action")
    public String entitiesTest(Model model,Bean bean){
        System.out.println(bean.getPerson());
        System.out.println(bean.getAnimal());
        model.addAttribute("person",bean.getPerson());
        model.addAttribute("animal",bean.getAnimal());
        return "success";
    }
}

五、SpringMVC支持在业务控制方法中收集数组参数

<form action="${pageContext.request.contextPath}/kaiye/array.action" method="post">
        <table border="1" align="center">
            <tr>
                <th>名字</th>
                <td><input type="checkbox" name="ids" value="1"/></td>
            </tr>
            <tr>
                <th>学号</th>
                <td><input type="checkbox" name="ids" value="2"/></td>
            </tr>
            <tr>
                <th>日期</th>
                <td><input type="checkbox" name="ids" value="3"/></td>
            </tr>
            <tr>
                <td>
                <input type="submit" value="009测试"/>
                </td>
            </tr>
        </table>
    </form>

@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(value="/array.action")
    public String hello(Model model,int ids[]){
        for(int i:ids){
            System.out.println(i);
        }
        return "success";
    }
}

六、SpringMVC支持在业务控制方法中收集List<JavaBean>参数

<form action="${pageContext.request.contextPath}/kaiye/beanList.action" method="post">
        <table border="1" align="center">
            <tr>
                <td><input type="checkbox" name="persons[0].name" value="名字1"/></td>
                <td><input type="checkbox" name="persons[0].number" value="编号1"/></td>
            </tr>
            <tr>
                <td><input type="checkbox" name="persons[1].name" value="名字2"/></td>
                <td><input type="checkbox" name="persons[1].number" value="编号2"/></td>
            </tr>
            <tr>
                <td>
                <input type="submit" value="010测试"/>
                </td>
            </tr>
        </table>
    </form>

public class Bean {
    private List<Person> persons = new ArrayList<Person>();

    public List<Person> getPersons() {
        return persons;
    }

    public void setPersons(List<Person> persons) {
        this.persons = persons;
    }    
}

@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(value="/beanList.action")
    public String beanList(Model model,Bean bean){
        System.out.println(bean.getPersons());
        return "success";
    }
}

七、SpringMVC支持结果的转发和重定向，在转发情况下，共享request域对象，会将参数从第一个业务控制方法传入第二个业务控制方法

/**
 * 重定向共享参数
 * @author fat
 */
@Controller
@RequestMapping(value="/kaiye")
public class HelloHAE{
    
    @RequestMapping(value="/hello.action")
    public String hello(Model model,String name){
        System.out.println("hello "+name);
        return "forward:/kaiye/goodbye.action";
    }
    
    @RequestMapping(value="/goodbye.action")
    public String goodbye(Model model,String name){
        System.out.println("goodbye "+name);
        return "success";
    }
}

八、SpringMVC支持异步发送表单数据到JavaBean，并响应JSON文本返回

<h3>013测试</h3>
    <input type="button" value="person转json">
    <input type="button" value="persons转json">
    <input type="button" value="map转json">
    <script type="text/javascript">
        $(":button:first").click(function(){
            var url = "${pageContext.request.contextPath}/kaiye/hello.action";
            var sendData = null;
            $.post(url,sendData,function(backData,textStatu,ajax){
                alert(ajax.responseText);
            })
        });
        $(":button:eq(1)").click(function(){
            var url = "${pageContext.request.contextPath}/kaiye/hellos.action";
            var sendData = null;
            $.post(url,sendData,function(backData,textStatu,ajax){
                alert(ajax.responseText);
            })
        });
        $(":button:eq(2)").click(function(){
            var url = "${pageContext.request.contextPath}/kaiye/hellomap.action";
            var sendData = null;
            $.post(url,sendData,function(backData,textStatu,ajax){
                alert(ajax.responseText);
            })
        });
    </script>

/**
 * 将实体对象以Json的格式返回
 * @author fat
 */
@Controller
@RequestMapping(value="/kaiye")    
public class HelloHAE{
    
    @RequestMapping(value="/hello")
    public @ResponseBody Person hello(){
        return new Person("kaiye","呵呵","12");
    }
    
    @RequestMapping(value="/hellos")
    public @ResponseBody List<Person> hellos(){
        List<Person> persons = new ArrayList<Person>();
        persons.add(new Person("狗","1","33"));
        persons.add(new Person("猫","2","44"));
        return persons;
    }
    
    @RequestMapping(value="/hellomap.action")
    public @ResponseBody Map<String,Object> hellomap(){
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("age",1);
        map.put("name","你好");
        return map;
    }
}