获取表单数据
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getParameter(String name) 通过名称获取表单数据
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getParameterValues(String name) 提取复选框的方法
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getParameterNames() 获取表单所有名称
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getParameterMap() 获取表单提交的所有值
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getInputStream() 获取表单字节流
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html部分
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/demo" method="post">
姓名：<input type="text" name="name" placeholder="姓名" value="测试">
年龄：<input type="number" name="age" min="1" max="99" value="31">
手机号：<input type="text" name="mobile" placeholder="手机号" value="13522178057">
技能：
<label><input type="checkbox" name="language" value="java">Java</label>
<label><input type="checkbox" name="language" value="php">PHP</label>
<label><input type="checkbox" name="language" value="python">Python</label>
性别：
<label><input type="radio" name="gender" value="1">男</label>
<label><input type="radio" name="gender" value="0">女</label>
<label><input type="submit" value="提交"></label>
</form>
</body>
</html>
- servlet部分
public class Demo extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
Enumeration ids = request.getParameterNames();
while (ids.hasMoreElements()) {
String name = (String) ids.nextElement();
System.out.print(name + ":");
String[] values = request.getParameterValues(name);
for (int i = 0; i < values.length; i++) {
System.out.println(values[i]);
}
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
System.out.println("id:" + request.getParameter("id"));
}
}
- 直接填充到实体类中
@WebServlet(name = "Demo")
public class Demo extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
TestEntity t = new TestEntity();
System.out.println("封装数据前" + t);
Map<String, String[]> map = request.getParameterMap();
for (Map.Entry<String, String[]> m : map.entrySet()) {
String name = m.getKey();
String[] values = m.getValue();
try {
// 创建属性描述器
PropertyDescriptor pd;
pd = new PropertyDescriptor(name, TestEntity.class);
// 获得setter
Method setter = pd.getWriteMethod();
if (values.length == 1) {
setter.invoke(t, values[0]);
} else {
setter.invoke(t, (Object) values);
}
} catch (Exception e) {
e.printStackTrace();
}
}
System.out.println("封装数据后：" + t);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
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