SpringMVC_RESTful

2018年3月31日 上午11:41

对RESTful的理解：

1. 其实就是要创建一种RESTful风格的URL
2. 参数全部暴露出来，通过斜杠的方式。_斜杠_就是RESTful的主要表现方式
3. 原先URL通过.do的方式，URL指向的是一个方法，而RESTful风格的URL指向的是一个资源。
4. 我理解RESTful就是一种定位到方法的新的方式，这种方式是springMVC本身就支持的。而我们最先使用的detail.do?productId=26这种.do的方式，也是springMVC自带的其中一种而已。

不适合用RESTful的情况：

1. 当方法需要的参数过多的时候，我们就必须在URL中写那么多的参数，看见就不舒服。
2. RESTful中声明的参数是不可以为空的，
   

SpringMVC_RESTful配置

一些例子：

下面的代码中有两个是bad例子，作为对比，很好理解，我就不带了写了，关键是理解清楚RESTful是干啥的就行了。

资源定位不准确，restfull不予许为空

package com.mmall.controller.portal;

import com.github.pagehelper.PageInfo;
import com.mmall.common.ServerResponse;
import com.mmall.service.IProductService;
import com.mmall.vo.ProductDetailVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Created by geely
 */

@Controller
@RequestMapping("/product/")
public class ProductController {

    @Autowired
    private IProductService iProductService;



    @RequestMapping("detail.do")
    @ResponseBody
    public ServerResponse<ProductDetailVo> detail(Integer productId){
        return iProductService.getProductDetail(productId);
    }


    @RequestMapping(value = "/{productId}", method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<ProductDetailVo> detailRESTful(@PathVariable Integer productId){
        return iProductService.getProductDetail(productId);
    }

    @RequestMapping("list.do")
    @ResponseBody
    public ServerResponse<PageInfo> list(@RequestParam(value = "keyword",required = false)String keyword,
                                         @RequestParam(value = "categoryId",required = false)Integer categoryId,
                                         @RequestParam(value = "pageNum",defaultValue = "1") int pageNum,
                                         @RequestParam(value = "pageSize",defaultValue = "10") int pageSize,
                                         @RequestParam(value = "orderBy",defaultValue = "") String orderBy){
        return iProductService.getProductByKeywordCategory(keyword,categoryId,pageNum,pageSize,orderBy);
    }


    //http://www.happymmall.com/product/手机/100012/1/10/price_asc
    @RequestMapping(value = "/{keyword}/{categoryId}/{pageNum}/{pageSize}/{orderBy}",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<PageInfo> listRESTful(@PathVariable(value = "keyword")String keyword,
                                         @PathVariable(value = "categoryId")Integer categoryId,
                                         @PathVariable(value = "pageNum") Integer pageNum,
                                         @PathVariable(value = "pageSize") Integer pageSize,
                                         @PathVariable(value = "orderBy") String orderBy){
        if(pageNum == null){
            pageNum = 1;
        }
        if(pageSize == null){
            pageSize = 10;
        }
        if(StringUtils.isBlank(orderBy)){
            orderBy = "price_asc";
        }

        return iProductService.getProductByKeywordCategory(keyword,categoryId,pageNum,pageSize,orderBy);
    }


//    http://www.happymmall.com/product/100012/1/10/price_asc
    @RequestMapping(value = "/{categoryId}/{pageNum}/{pageSize}/{orderBy}",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<PageInfo> listRESTfulBadcase(@PathVariable(value = "categoryId")Integer categoryId,
                                                @PathVariable(value = "pageNum") Integer pageNum,
                                                @PathVariable(value = "pageSize") Integer pageSize,
                                                @PathVariable(value = "orderBy") String orderBy){
        if(pageNum == null){
            pageNum = 1;
        }
        if(pageSize == null){
            pageSize = 10;
        }
        if(StringUtils.isBlank(orderBy)){
            orderBy = "price_asc";
        }

        return iProductService.getProductByKeywordCategory("",categoryId,pageNum,pageSize,orderBy);
    }


    @RequestMapping(value = "/{keyword}/{pageNum}/{pageSize}/{orderBy}",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<PageInfo> listRESTfulBadcase(@PathVariable(value = "keyword")String keyword,
                                                @PathVariable(value = "pageNum") Integer pageNum,
                                                @PathVariable(value = "pageSize") Integer pageSize,
                                                @PathVariable(value = "orderBy") String orderBy){
        if(pageNum == null){
            pageNum = 1;
        }
        if(pageSize == null){
            pageSize = 10;
        }
        if(StringUtils.isBlank(orderBy)){
            orderBy = "price_asc";
        }

        return iProductService.getProductByKeywordCategory(keyword,null,pageNum,pageSize,orderBy);
    }


    //http://www.happymmall.com/product/keyword/手机/1/10/price_asc
    @RequestMapping(value = "/keyword/{keyword}/{pageNum}/{pageSize}/{orderBy}",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<PageInfo> listRESTful(@PathVariable(value = "keyword")String keyword,
                                                       @PathVariable(value = "pageNum") Integer pageNum,
                                                       @PathVariable(value = "pageSize") Integer pageSize,
                                                       @PathVariable(value = "orderBy") String orderBy){
        if(pageNum == null){
            pageNum = 1;
        }
        if(pageSize == null){
            pageSize = 10;
        }
        if(StringUtils.isBlank(orderBy)){
            orderBy = "price_asc";
        }

        return iProductService.getProductByKeywordCategory(keyword,null,pageNum,pageSize,orderBy);
    }


    //http://www.happymmall.com/product/category/100012/1/10/price_asc
    @RequestMapping(value = "/category/{categoryId}/{pageNum}/{pageSize}/{orderBy}",method = RequestMethod.GET)
    @ResponseBody
    public ServerResponse<PageInfo> listRESTful(@PathVariable(value = "categoryId")Integer categoryId,
                                                       @PathVariable(value = "pageNum") Integer pageNum,
                                                       @PathVariable(value = "pageSize") Integer pageSize,
                                                       @PathVariable(value = "orderBy") String orderBy){
        if(pageNum == null){
            pageNum = 1;
        }
        if(pageSize == null){
            pageSize = 10;
        }
        if(StringUtils.isBlank(orderBy)){
            orderBy = "price_asc";
        }

        return iProductService.getProductByKeywordCategory("",categoryId,pageNum,pageSize,orderBy);
    }
}