Struts2（2）——Struts2核心知识（下）

目录

 

1，分模块配置方法；

2，struts2通配符；

3，动态方法调用；

---

1，分模块配置方法；

我们先在struts.xml里面写上两个.xml文件；

用到include语法

<include file="xiaoshou.xml"></include>
<include file="yanfa.xml"></include>

并且新建两个.xml文件如下； 

xiaoshou.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="xiaoshou" namespace="/xiaoshou" extends="struts-default">
        <action name="xiaoshou"  class="com.java.action.XiaoShouAction">
            <result name="success">${pageContext.request.contextPath}/success.jsp</result>
            <result name="error">error.jsp</result>
        </action>
    </package>

</struts>

yanfa.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="yanfa" namespace="/yanfa" extends="struts-default">
        <action name="yanfa"  class="com.java.action.YanFaAction">
            <result name="success">${pageContext.request.contextPath}/success.jsp</result>
            <result name="error">error.jsp</result>
        </action>
    </package>

</struts>

然后我们写处理类XiaoShouAction类和YanFaAction类；

 XiaoShouAction:

package com.java.action;

import com.opensymphony.xwork2.ActionSupport;

public class XiaoShouAction extends ActionSupport {

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

YanFaAction:

package com.java.action;

import com.opensymphony.xwork2.ActionSupport;

public class YanFaAction extends ActionSupport {

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

这时，我们可以测试一下，在浏览器中输入：

可以跳到success.jsp页面！

并且也调用了execute()方法：

2，struts2通配符；

先建立两个实体类；

SAction.java； 

package com.java.action;

import com.opensymphony.xwork2.ActionSupport;

public class SAction extends ActionSupport {

    private String name;

    public String getName() {
        return name;
    }

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

    public String list() throws Exception{
        System.out.println("学生查找");
        name="学生查找";
        return SUCCESS;
    }
    public String add() throws Exception{
        System.out.println("学生添加");
        name="学生添加";
        return SUCCESS;
    }
    public String update() throws Exception{
        System.out.println("学生修改");
        name="学生修改";
        return SUCCESS;
    }
    public String delete() throws Exception{
        System.out.println("学生删除");
        name="学生删除";
        return SUCCESS;
    }
}

 GAction.java；

package com.java.action;

import com.opensymphony.xwork2.ActionSupport;

public class GAction extends ActionSupport {

    private String name;

    public String getName() {
        return name;
    }

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

    public String list() throws Exception{
        System.out.println("班级查找");
        name="班级查找";
        return SUCCESS;
    }
    public String add() throws Exception{
        System.out.println("班级添加");
        name="班级添加";
        return SUCCESS;
    }
    public String update() throws Exception{
        System.out.println("班级修改");
        name="班级修改";
        return SUCCESS;
    }
    public String delete() throws Exception{
        System.out.println("班级删除");
        name="班级删除";
        return SUCCESS;
    }
}

struts.xml配置；

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>

    <package name="manage" namespace="/" extends="struts-default">


        <global-allowed-methods>regex:.*</global-allowed-methods>

        <action name="student_*"  class="com.java.action.SAction" method="{1}">
            <result name="success">/success.jsp</result>
        </action>

        <action name="grade_*"  class="com.java.action.GAction" method="{1}">
            <result name="success">/success.jsp</result>
        </action>


    </package>

</struts>

sg.jsp；

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>通配符</h1>
<a href="student_list" target="_blank">学生信息查询</a>&nbsp;
<a href="student_add" target="_blank">学生信息添加</a>&nbsp;
<a href="student_update" target="_blank">学生信息修改</a>&nbsp;
<a href="student_delete" target="_blank">学生信息删除</a>&nbsp;
<br/><br/>
<a href="grade_list" target="_blank">班级信息查询</a>&nbsp;
<a href="grade_add" target="_blank">班级信息添加</a>&nbsp;
<a href="grade_update" target="_blank">班级信息修改</a>&nbsp;
<a href="grade_delete" target="_blank">班级信息删除</a>&nbsp;<br/>
<h1>动态方法调用</h1>
<a href="student!list" target="_blank">学生信息查询</a>&nbsp;
<a href="student!add" target="_blank">学生信息添加</a>&nbsp;
<a href="student!update" target="_blank">学生信息修改</a>&nbsp;
<a href="student!delete" target="_blank">学生信息删除</a>&nbsp;
<br/><br/>
<a href="grade!list" target="_blank">班级信息查询</a>&nbsp;
<a href="grade!add" target="_blank">班级信息添加</a>&nbsp;
<a href="grade!update" target="_blank">班级信息修改</a>&nbsp;
<a href="grade!delete" target="_blank">班级信息删除</a>&nbsp;<br/>
</body>
</html>

success.jsp；

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
success!${name}
</body>
</html>

运行结果：

还有另外一种通配符格式；

<action name="*_*"  class="com.java.action.{1}Action" method="{2}">
            <result name="success">success.jsp</result>
        </action>

使用这种格式的话要将sg.jsp里面的链接首字母要大写，而且实体类的名称要与链接名称与之对应！

3，动态方法调用；

sg.jsp页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>通配符</h1>
<a href="student_list" target="_blank">学生信息查询</a>&nbsp;
<a href="student_add" target="_blank">学生信息添加</a>&nbsp;
<a href="student_update" target="_blank">学生信息修改</a>&nbsp;
<a href="student_delete" target="_blank">学生信息删除</a>&nbsp;
<br/><br/>
<a href="grade_list" target="_blank">班级信息查询</a>&nbsp;
<a href="grade_add" target="_blank">班级信息添加</a>&nbsp;
<a href="grade_update" target="_blank">班级信息修改</a>&nbsp;
<a href="grade_delete" target="_blank">班级信息删除</a>&nbsp;<br/>
<h1>动态方法调用</h1>
<a href="student!list" target="_blank">学生信息查询</a>&nbsp;
<a href="student!add" target="_blank">学生信息添加</a>&nbsp;
<a href="student!update" target="_blank">学生信息修改</a>&nbsp;
<a href="student!delete" target="_blank">学生信息删除</a>&nbsp;
<br/><br/>
<a href="grade!list" target="_blank">班级信息查询</a>&nbsp;
<a href="grade!add" target="_blank">班级信息添加</a>&nbsp;
<a href="grade!update" target="_blank">班级信息修改</a>&nbsp;
<a href="grade!delete" target="_blank">班级信息删除</a>&nbsp;<br/>
</body>
</html>

struts.xml；

 <action name="student"  class="com.java.action.SAction">
                <result name="success">/success.jsp</result>
            </action>

            <action name="grade"  class="com.java.action.GAction">
                <result name="success">/success.jsp</result>
            </action>

运行结果：

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