RESTful風格 將請求信息與狀態關聯
- /order/1 HTTP GET :得到id = 1 的 order
- /order/1 HTTP DELETE: 刪除 id=1 的order
- /order/1 HTTP PUT : 更新id = 1的 order
- /order/1 HTTP POST : 新增 order
通過修改http的狀態值來標記請求的目的
Spring中實現RESTful風格
HiddenHttpMethodFilter:瀏覽器form表單只支持GET和POST,不支持DELETE和PUT請求,
Spring添加了一個過濾器,可以將這些請求轉換爲標準的http方法,支持GET,POST,DELETE,PUT請求!
web.xml添加HiddenHttpMethodFilter配置
HiddenHttpMethodFilter org.springframework.web.filter.HiddenHttpMethodFilter HiddenHttpMethodFilter /*需要注意: 由於doFilterInternal方法只對method爲post的表單進行過濾，所以在頁面中必須如下設置：
<form action="..." method="post">
<input type="hidden" name="_method" value="put" />
</form>
代表post請求,但是HiddenHttpMethodFilter將把本次請求轉化成標準的put請求方式! name="_method"固定寫法!
<html>
<body>
<h2>Hello World!</h2>
<script type="text/javascript">
function a(){
//設置表單的action值
document.forms[0].action="test";
// document.getElementById("txt").value("post");
document.forms[0].submit();
}
function b() {
//設置表單的action值
document.forms[0].action = "test/1";
document.getElementById("txt").value="put";
document.forms[0].submit();
}
function c(){
//設置表單的action值
document.forms[0].action="test/1";
document.getElementById("txt").value="delete";
document.forms[0].submit();
}
function d(){
//設置表單的action值
location.href="test/1";
// document.forms[0].action="test/1";
// document.getElementById("txt").value("get");
// document.forms[0].submit;
}
</script>
<span onclick="a()">insert</span><br> <%--test--%>
<span onclick="b()">update</span><br> <%--test/1--%>
<span onclick="c()">delete</span>
<span onclick="d()">select</span>
<form method="post">
<input type="hidden" id= "txt" name="_method" value="POST"/>
</form>
</body>
</html>
Test
@Controller
public class TestRestful {
@RequestMapping(value = "test", method = RequestMethod.POST)
public String test1(){
System.out.println("insert --");
return "insert";
}
@RequestMapping( value = "test/{id}", method = RequestMethod.PUT)
public String test2(@PathVariable("id") int uid ){
System.out.println("update --");
return "update";
}
@RequestMapping(value = "test/{id}", method = RequestMethod.DELETE)
public String test3(@PathVariable("id") int uid ){
System.out.println("delete --");
return "delete";
}
@RequestMapping(value = "test/{id}",method = RequestMethod.GET)
public String test4(@PathVariable("id") int uid ){
System.out.println("select");
return "select";
}
}