入门
Param.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="param/testParam?username=zhangsan&password=123">请求参数绑定</a>
</body>
</html>
ParamController
@Controller
@RequestMapping("/param")
public class ParamController {
@RequestMapping("/testParam")
public String testParam(String username, String password) {
System.out.println("请求成功");
System.out.println("用户名:" + username);
System.out.println("密码:" + password);
return "success";
}
}
结果
请求参数绑定实体类
一个实体类中包含另一个实体类引用的情况
Account实体类(省略get/set/toString方法)
public class Account implements Serializable {
private String username;
private String password;
private Double money;
private User user;
}
User实体类(省略get/set/toString方法)
public class User implements Serializable {
private String uName;
private String uAge;
}
Param.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="param/saveAccount" method="post">
<table>
<tr>
<td>用户名:</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码:</td>
<td><input type="text" name="password"></td>
</tr>
<tr>
<td>金额:</td>
<td><input type="text" name="money"></td>
</tr>
<tr>
<td>用户姓名:</td>
<td><input type="text" name="user.uName"></td>
</tr>
<tr>
<td>用户年龄:</td>
<td><input type="text" name="user.uAge"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="保存"></td>
</tr>
</table>
</form>
</body>
</html>
ParamController
@RequestMapping("/saveAccount")
public String saveAccount(Account account) {
System.out.println("请求成功");
System.out.println(account);
return "success";
}
请求结果
解决中文乱码
1.在web.xml中添加配置
<!--配置解决中文乱码-->
<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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
再次运行结果
#### 请求参数绑定集合类型
Account类增加两个集合
private List<User> list;
private Map<String, User> map;
表单
<!--封装到list中-->
<!--[索引]-->
<tr>
<td>用户姓名:</td>
<td><input type="text" name="list[0].uName"></td>
</tr>
<tr>
<td>用户年龄:</td>
<td><input type="text" name="list[0].uAge"></td>
</tr>
<!--封装到map中-->
<!--[key值]-->
<tr>
<td>用户姓名:</td>
<td><input type="text" name="map['first'].uName"></td>
</tr>
<tr>
<td>用户年龄:</td>
<td><input type="text" name="map['first'].uAge"></td>
</tr>
再次运行结果
