form表单参数接收的三种方式：
1.HttpServletRequest
@RequestMapping(value = "/getParmByReq.do", method = RequestMethod.POST)
@RequestMapping(value = "/getParmByReq.do", method = RequestMethod.POST) @ResponseBody public String getParmByReq(HttpServletRequest request) { String name = request.getParameter("name"); int age = Integer.parseInt(request.getParameter("age")); System.out.println("接收到的参数,name=" + name + ";age=" + age); return "接收到的参数,name=" + name + ";age=" + age; }
用curl 测试结果： （-d 表示post请求）
curl -d "name=admin&age=34" http://localhost:8080/ssm-req/form/getParmByReq.do
2. 一个个参数接收，单个参数按照名称接收：
@RequestMapping(value = "/requestParam.do", method = RequestMethod.POST) @ResponseBody public String getBarBySimplePathWithRequestParam( @RequestParam(value = "name") String name, @RequestParam(value = "age") Integer age ) { System.out.println("接收到的参数,name=" + name + ";age=" + age); return "接收到的参数,name=" + name + ";age=" + age; }
用curl 测试结果:
curl -d "name=ceshi&age=22" http://localhost:8080/ssm-req/form/requestParam.do
3. 自定义实体类接收，使用注解：@ModelAttribute
@RequestMapping(value = "modelAttribute.do", method = RequestMethod.POST) @ResponseBody public String getModelAttribute(@ModelAttribute() User user) { System.out.println("接收到的参数,name=" + user.getName() + ";age=" + user.getAge()); return "接收到的参数,name=" + user.getName() + ";age=" + user.getAge(); }
用curl 测试结果:
curl -d "name=jaywei&age=33" http://localhost:8080/ssm-req/form/modelAttribute.do
4. 不用流的形式接收
@RequestMapping(value = "/getNotStream.do") @ResponseBody public String getNotStream(String order) { JSONObject jsonObject = JSONObject.parseObject(order); System.out.println("接收到的参数,name=" + jsonObject.getString("name") + ";age=" + jsonObject.getString("age")); return "接收到的参数,name=" + jsonObject.getString("name") + ";age=" + jsonObject.getString("age"); }
用curl 测试结果
curl -d "order={'name':'张三','age':12}" http://localhost:8080/ssm-req/form//getNotStream.do
小结：
推荐使用：@ModelAttribute 接收参数的方式。
PS: 解决中文乱码问题，在web.xml文件中加入字符过滤器：
<filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
JSON提交参数接收
使用@RequestBody注解，该注解是将参数放在请求体中
@RequestMapping(value = "getJson2.do",produces = "application/json") public String getJson2(@RequestBody String userStr) { User user = JSON.parseObject(userStr, User.class); System.out.println("接收到的参数,name=" + user.getName() + ";age=" + user.getAge()); return JSON.toJSONString("接收到的参数,name=" + user.getName() + ";age=" + user.getAge()); }
用curl测试结果
curl -H "Content-Type:application/json" -X POST -d "{'name':'sange','age':12}" http://localhost:8080/ssm-req/json/getJson2.do
源码地址：
https://github.com/XWxiaowei/JavaWeb/tree/master/ssm-request-demo
