标签：rop att ble 中文乱码问题 serial password 自定义类型转换器 text ice
要求：提交表单的name和参数的名称是相同的
举例：
param.jsp
<a href="param/testParam?username=hehe&password=123">RequestMapping注解</a>ParamController
@Controller
@RequestMapping("/param")
public class ParamController {
// 基本数据类型
@RequestMapping("/testParam")
public String testParam(String username,String password){
System.out.println("基本数据类型");
System.out.println("用户名："+username);
System.out.println("密码："+password);
return "success";
}
}name 必须和bean中的属性名称一样；
构建一个实体类
public class Account implements Serializable {
private String username;
private String password;
private Double money;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
", money=" + money +
'}';
}
}Controller
//请求参数绑定把数据封装到JavaBean的类中
@RequestMapping("/saveAccount")
public String saveAccount(Account account){
System.out.println("执行了...");
System.out.println(account);
return "success";
}输出结果
解决中文乱码问题，在web.xml中配置
<!--配置解决中文乱码的过滤器-->
<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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>如果Account中有User类型，在此之前我们需要先配置一个User类
public class User implements Serializable {
private String uname;
private Integer age;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User{" +
"uname='" + uname + '\'' +
", age=" + age +
'}';
}
}Account类
public class Account implements Serializable {
private String username;
private String password;
private Double money;
private User user;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
@Override
public String toString() {
return "Account{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
", money=" + money +
", user=" + user +
'}';
}
}params.jsp文件
<form action="param/saveAccount" method="post">
姓名：<input type="text" name="username" /><br/>
密码：<input type="text" name="password" /><br/>
金额：<input type="text" name="money" /><br/>
用户姓名：<input type="text" name="user.uname" /><br/>
用户年龄：<input type="text" name="user.age" /><br/>
<input type="submit" value="提交" />
</form>
请求参数绑定到方法上，方法不变
输出结果：
public class Account implements Serializable {
private String username;
private String password;
private Double money;
private List<User> list;
private Map<String,User> map;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
public List<User> getList() {
return list;
}
public void setList(List<User> list) {
this.list = list;
}
public Map<String, User> getMap() {
return map;
}
public void setMap(Map<String, User> map) {
this.map = map;
}
@Override
public String toString() {
return "Account{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
", money=" + money +
", list=" + list +
", map=" + map +
'}';
}
}params.jsp文件
<!--把数据封装到Account类中,类中存在list和map集合-->
<form action="param/saveAccount" method="post">
姓名：<input type="text" name="username" /><br/>
密码：<input type="text" name="password" /><br/>
金额：<input type="text" name="money" /><br/>
用户姓名：<input type="text" name="list[0].uname" /><br/>
用户年龄：<input type="text" name="list[0].age" /><br/>
用户姓名：<input type="text" name="map['one'].uname" /><br/>
用户年龄：<input type="text" name="map['one'].age" /><br/>
<input type="submit" value="提交" />
</form>输出结果
表单提交的任何数据类型全部都是字符串类型，但是后台定义Integer类型，数据也可以封装上，说明Spring框架内部会默认进行数据类型转换。
如果想自定义数据类型转换，可以实现Converter的接口。
在user类中加入新的date属性
public class User implements Serializable {
private String uname;
private Integer age;
private Date date;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
@Override
public String toString() {
return "User{" +
"uname='" + uname + '\'' +
", age=" + age +
", date=" + date +
'}';
}
}表单
<form action="param/saveUser" method="post">
用户姓名：<input type="text" name="uname" /><br/>
用户年龄：<input type="text" name="age" /><br/>
出生日期：<input type="text" name="date"/><br/>
<input type="submit" value="提交" />
</form>请求参数绑定到方法
@RequestMapping("/saveUser")
public String saveUser(User user){
System.out.println("user保存了");
System.out.println(user);
return "success";
}页面输入
输出结果：
页面输入格式有问题，就会出现400错误。
自定义类型转换器StringToDateConverter
public class StringToDateConverter implements Converter<String,Date> {
/**
* String source 传入进来字符串
* @param source
* @return
*/
public Date convert(String source) {
// 判断
if(source == null){
throw new RuntimeException("请您传入数据");
}
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
try {
// 把字符串转换日期
return df.parse(source);
} catch (Exception e) {
throw new RuntimeException("数据类型转换出现错误");
}
}
}在springmvc.xml配置文件中配置自定义类型转换器
<!--配置自定义类型转换器-->
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="com.ben.utils.StringToDateConverter"/>
</set>
</property>
</bean>
<!-- 开启SpringMVC框架注解的支持 -->
<mvc:annotation-driven conversion-service="conversionService"/>输出结果
标签：rop att ble 中文乱码问题 serial password 自定义类型转换器 text ice
原文地址：https://www.cnblogs.com/benjieqiang/p/11331742.html
