springboot 中 @PathVariable 和 @RequestParam的异同及使用方法_综合

这两个参数都是用来处理request中的参数值的

但是处理的参数形式（url）不同

@RequestParam 处理的是 http://localhost/paper/editpage?paperId=1

@PathVariable 处理的是 http://localhost/paper/editpage/1

(我这里吧端口号设置为80了，所以直接localhost就行了)

前端页面代码

<a class="btn btn-sm btn-primary"th:href="@{/paper/editpage/} + ${paper.paperId}">编辑<!--经过thymeleaf渲染之后：  /paper/editpage/1 -->
</a>
<a class="btn btn-sm btn-primary"th:href="@{/paper/editpage(paperId=${paper.paperId})}">测试连接<!--经过thymeleaf渲染之后： /paper/editpage?paperId=1 -->
</a>

经过thymeleaf渲染之后

Controoler处理代码

@GetMapping("/editpage/{paperId}")
public ModelAndView editPage(@PathVariable("paperId") Integer paperId) {System.out.println("PathVariable:" + paperId);Paper paper = paperService.selectPaper(paperId);System.out.println(paper);return new ModelAndView("paper/addPaper", "paper", paper);
}@GetMapping("/editpage")
public ModelAndView editPagetest(@RequestParam("paperId") Integer paperId) {System.out.println("RequestParam:" + paperId);Paper paper = paperService.selectPaper(paperId);System.out.println(paper);return new ModelAndView("paper/addPaper", "paper", paper);
}

点击编辑按钮之后

点击测试连接之后