1. Struts2 getter/setter 自动获取/设置参数

过一下Struts2-2_html


上述前端使用GET方法。POST方法也可以：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="hello" method="post">
    name：<input type="text" name="name"/>
    <input type="submit" value="Submit"/>
</form>
</body>
</html>

2. ActionSupport类的引入

public class HelloWorldAction2 extends ActionSupport {

  /**
   * 
   */
  private static final long serialVersionUID = 1L;
  private String name;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String execute() throws Exception {
    System.out.println("执行了HelloWorldAction2 Action的默认方法");
    return SUCCESS;
  }

}

ActionSupport的实现：

public class ActionSupport implements Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable {
......

一般开发是使用ActionSupport类而不是Action接口，效果一样。

3. Action设置数据

  • 属性驱动（FieldDriven）
  1. 基本数据类型属性

关键代码如下：

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
  <package name="helloworld" extends="struts-default">
    <!-- 请求 /hello -->
    <action name="hello" class="com.bee.action.HelloWorldAction">
      <result name="success">helloworld.jsp</result>
    </action>

    <action name="user" class="com.bee.action.UserAction">
      <result name="success">success.jsp</result>
      <result name="error">error.jsp</result>
    </action>
  </package>
</struts>

User.java

public class User {

  private String userName;
  private String password;

  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;
  }

}

UserAction .java

public class UserAction extends ActionSupport {

  /**
   * 
   */
  private static final long serialVersionUID = 1L;

  private UserService userService = new UserService();

  private String userName;
  private String password;

  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;
  }

  @Override
  public String execute() throws Exception {
    System.out.println("执行了UserAction的默认方法");
    User user = new User();
    user.setUserName(userName);
    user.setPassword(password);
    if (userService.login(user)) {
      return SUCCESS;
    } else {
      return ERROR;
    }
  }

}

UserService.java

public class UserService {

  public boolean login(User user) {
    if ("bee".equals(user.getUserName()) && "123456".equals(user.getPassword())) {
      return true;
    } else {
      return false;
    }
  }
}

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="user" method="post">
    用户名：<input type="text" name="userName"/>
    密码：<input type="text" name="password"/>
    <input type="submit" value="登录"/>
</form>
</body>
</html>
  1. JavaBean类型属性

关键代码如下：

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
  <package name="helloworld" extends="struts-default">
    <action name="user2" class="com.bee.action.UserAction2">
          <result name="success">success.jsp</result>
          <result name="error">error.jsp</result>
      </action>
  </package>
</struts>

UserAction2.java

public class UserAction2 extends ActionSupport {

  /**
   * 
   */
  private static final long serialVersionUID = 1L;

  private UserService userService = new UserService();

  private User user;

  public User getUser() {
    return user;
  }

  public void setUser(User user) {
    this.user = user;
  }

  @Override
  public String execute() throws Exception {
    System.out.println("执行了UserAction的默认方法");
    if (userService.login(user)) {
      return SUCCESS;
    } else {
      return ERROR;
    }
  }

}

login2.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="user2" method="post">
    用户名：<input type="text" name="user.userName"/>
    密码：<input type="text" name="user.password"/>
    <input type="submit" value="登录"/>
</form>
</body>
</html>
  • 模型驱动（ModelDriven）
    只接收一个JavaBean。

关键代码：

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
  <package name="helloworld" extends="struts-default">
    <action name="user3" class="com.bee.action.UserAction3">
      <result name="success">success.jsp</result>
      <result name="error">error.jsp</result>
    </action>
  </package>
</struts>

UserAction3.java

public class UserAction3 extends ActionSupport implements ModelDriven<User> {

  /**
   * 
   */
  private static final long serialVersionUID = 1L;

  private UserService userService = new UserService();

  private User user = new User();

  @Override
  public String execute() throws Exception {
    System.out.println("执行了UserAction3的默认方法");
    if (userService.login(user)) {
      return SUCCESS;
    } else {
      return ERROR;
    }
  }

  @Override
  public User getModel() {
    return user;
  }

}

login3.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="user3" method="post">
    用户名：<input type="text" name="userName"/>
    密码：<input type="text" name="password"/>
    <input type="submit" value="登录"/>
</form>
</body>
</html>