Struts(二十一)：类型转换与复杂属性、集合属性配合使用

背景：

　　本章节主要以复杂属性、集合属性类型转化为例，来学习这两种情况下怎么使用。

复杂对象属性转换场景：

1、新建struts_04

web.xml

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

<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Struts 02</display-name>

    <filter>

        <filter-name>struts2</filter-name>

        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>struts2</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

    <welcome-file-list>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>

</web-app>

struts.xml

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

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

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

        <action name="abstractPropertyAction" class="com.dx.struts2app.ConversionAction" method="execute">

            <result>/success.jsp</result>

            <result name="input">/index.jsp</result>

        </action>

    </package>

</struts>

com.dx.struts2app.ConversionAction.java

package com.dx.struts2app;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class ConversionAction extends ActionSupport implements ModelDriven<Member> {

    private static final long serialVersionUID = 1L;

    private Member member;

    public String execute() {

        System.out.println(this.member);

        return SUCCESS;

    }

    @Override

    public Member getModel() {

        member = new Member();

        return member;

    }

}

com.dx.struts2app.Member.java(Member属性中包含了department属性)

package com.dx.struts2app;

public class Member {

    private String id;

    private String name;

    private Department department;

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Department getDepartment() {

        return department;

    }

    public void setDepartment(Department department) {

        this.department = department;

    }

    @Override

    public String toString() {

        return "Member [id=" + id + ", name=" + name + ", department=" + department + "]";

    }

}

com.dx.struts2app.Department.java

package com.dx.struts2app;

import java.awt.Point;

import java.util.Date;

public class Department {

    private String name;

    private Point position;

    private Date createTime;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Point getPosition() {

        return position;

    }

    public void setPosition(Point position) {

        this.position = position;

    }

    public Date getCreateTime() {

        return createTime;

    }

    public void setCreateTime(Date createTime) {

        this.createTime = createTime;

    }

    @Override

    public String toString() {

        return "Department [name=" + name + ", position=" + position + ", createTime=" + createTime + "]";

    }

}

com.dx.converters.PointConverter.java

package com.dx.converters;

import java.awt.Point;

import java.util.Map;

import org.apache.struts2.util.StrutsTypeConverter;

public class PointConverter extends StrutsTypeConverter {

    public PointConverter() {

        System.out.println("PointConverter's constructor...");

    }

    @Override

    public Object convertFromString(Map context, String[] values, Class toClass) {

        System.out.println("convertFromString...");

        if (toClass == Point.class) {

            if (values != null && values.length > 0 && values[0].indexOf(",") > 0) {

                try {

                    int x = Integer.valueOf(values[0].split(",")[0]);

                    int y = Integer.valueOf(values[0].split(",")[1]);

                    return new Point(x, y);

                } catch (Exception ex) {

                    ex.printStackTrace();

                }

            }

        }

        return values;

    }

    @Override

    public String convertToString(Map context, Object o) {

        System.out.println("convertToString...");

        if (o instanceof Point) {

            Point point = (Point) o;

            return point.getX() + "," + point.getY();

        }

        return null;

    }

}

src下新建文件xwork-conversion.properties，并编辑内容：

java.awt.Point=com.dx.converters.PointConverter

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>My test page</title>

</head>

<body>

    <s:debug></s:debug>

    <s:form action="abstractPropertyAction" method="post">

        <s:textfield name="name" label="Name"></s:textfield>

        <s:textfield name="department.name" label="department.name"></s:textfield>

        <s:textfield name="department.position" label="department.position"></s:textfield>

        <s:textfield name="department.createTime"

            label="department.createTime"></s:textfield>

        <s:submit label="提交"></s:submit>

    </s:form>

</body>

</html>

success.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>

SUCCESS!

</body>

</html>

访问index.jsp,并提交:

成功提交了，成功的转换了java.awt.Point：

后台打印信息：

2017-04-04 15:01:20,259 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Choosing bean (struts) for (com.opensymphony.xwork2.security.AcceptedPatternsChecker)

PointConverter's constructor...

四月 04, 2017 3:01:20 下午 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory D:\Work\Java\apache-tomcat-7.0.75-windows-x64\apache-tomcat-7.0.75\webapps\docs

四月 04, 2017 3:01:20 下午 org.apache.catalina.startup.HostConfig deployDirectory

。。。。。。

信息: Starting ProtocolHandler ["ajp-bio-8009"]

四月 04, 2017 3:01:20 下午 org.apache.catalina.startup.Catalina start

信息: Server startup in 6488 ms

convertFromString...

Member [id=null, name=123, department=Department [name=234, position=java.awt.Point[x=5,y=6], createTime=Tue Apr 04 14:44:45 CST 2017]]

复杂对象属性转换场景：

修改Member.java类：

package com.dx.struts2app;

import java.util.ArrayList;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class ConversionAction extends ActionSupport implements ModelDriven<List<Member>> {

    private static final long serialVersionUID = 1L;

    private List<Member> members;

    public String execute() {

        System.out.println(this.members);

        return SUCCESS;

    }

    public List<Member> getMembers() {

        return members;

    }

    public void setMembers(List<Member> members) {

        this.members = members;

    }

    @Override

    public List<Member> getModel() {

        members = new ArrayList<Member>();

        return members;

    }

}

修改index.jsp 页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>My test page</title>

</head>

<body>

    <s:debug></s:debug>

    <s:form action="abstractPropertyAction" method="post">

        <s:textfield name="members[0].name" label="members[0].Name"></s:textfield>

        <s:textfield name="members[0].department.name" label="members[0].department.name"></s:textfield>

        <s:textfield name="members[0].department.position" label="members[0].department.position"></s:textfield>

        <s:textfield name="members[0].department.createTime" label="members[0].department.createTime"></s:textfield>

        <br/>

        <s:textfield name="members[1].name" label="members[1].Name"></s:textfield>

        <s:textfield name="members[1].department.name" label="members[1].department.name"></s:textfield>

        <s:textfield name="members[1].department.position" label="members[1].department.position"></s:textfield>

        <s:textfield name="members[1].department.createTime" label="members[1].department.createTime"></s:textfield>

        <s:submit label="提交"></s:submit>

    </s:form>

</body>

</html>

访问index.jsp页面：

提交表单成功，后台打印信息：

。。。。。。
2017-04-04 15:28:57,351 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Choosing bean (struts) for (com.opensymphony.xwork2.security.AcceptedPatternsChecker)

PointConverter's constructor...

信息: Starting ProtocolHandler ["ajp-bio-8009"]

四月 04, 2017 3:28:59 下午 org.apache.catalina.startup.Catalina start
。。。。。。

信息: Server startup in 8302 ms

2017-04-04 15:29:06,546 WARN  [http-bio-8080-exec-3] log4j2.Log4j2Logger (Log4j2Logger.java:57) - No configuration found for the specified action: 'abstractPropertyAction' in namespace: ''. Form action defaulting to 'action' attribute's literal value.

convertFromString...

convertFromString...

[Member [id=null, name=12, department=Department [name=11, position=java.awt.Point[x=2,y=3], createTime=Tue Apr 04 15:13:20 CST 2017]], Member [id=null, name=121, department=Department [name=111, position=java.awt.Point[x=21,y=31], createTime=Tue Apr 04 15:13:21 CST 2017]]]

集合嵌套集合属性类型转换（基于集合属性类型转换修改）：

Member.java

package com.dx.struts2app;

import java.util.List;

public class Member {

    private String id;

    private String name;

    private List<Department> departments;

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public List<Department> getDepartments() {

        return departments;

    }

    public void setDepartments(List<Department> departments) {

        this.departments = departments;

    }

    @Override

    public String toString() {

        return "Member [id=" + id + ", name=" + name + ", departments=" + departments + "]";

    }

}

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!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>My test page</title>

</head>

<body>

    <s:debug></s:debug>

    <s:form action="abstractPropertyAction" method="post">

        <s:textfield name="members[0].name" label="members[0].Name"></s:textfield>

        <s:textfield name="members[0].departments[0].name" label="members[0].departments[0].name"></s:textfield>

        <s:textfield name="members[0].departments[0].position" label="members[0].departments[0].position"></s:textfield>

        <s:textfield name="members[0].departments[0].createTime" label="members[0].departments[0].createTime"></s:textfield>

        <s:textfield name="members[0].departments[1].name" label="members[0].departments[1].name"></s:textfield>

        <s:textfield name="members[0].departments[1].position" label="members[0].departments[1].position"></s:textfield>

        <s:textfield name="members[0].departments[1].createTime" label="members[0].departments[1].createTime"></s:textfield>

        <s:textfield name="members[1].name" label="members[1].Name"></s:textfield>

        <s:textfield name="members[1].departments[0].name" label="members[1].departments[0].name"></s:textfield>

        <s:textfield name="members[1].departments[0].position" label="members[1].departments[0].position"></s:textfield>

        <s:textfield name="members[1].departments[0].createTime" label="members[1].departments[0].createTime"></s:textfield>

        <s:textfield name="members[1].departments[1].name" label="members[1].departments[1].name"></s:textfield>

        <s:textfield name="members[1].departments[1].position" label="members[1].departments[1].position"></s:textfield>

        <s:textfield name="members[1].departments[1].createTime" label="members[1].departments[1].createTime"></s:textfield>

        <s:submit label="提交"></s:submit>

    </s:form>

</body>

</html>

访问页面index.jsp

提交成功，后台打印信息

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

PointConverter's constructor...

2017-04-04 15:40:54,859 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Parsing configuration file [struts-default.xml]

。。。。。。

2017-04-04 15:40:54,936 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Choosing bean (struts) for (com.opensymphony.xwork2.security.AcceptedPatternsChecker)

PointConverter's constructor...

四月 04, 2017 3:40:55 下午 org.apache.catalina.startup.TldConfig execute

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

PointConverter's constructor...

2017-04-04 15:40:56,519 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Parsing configuration file [struts-default.xml]

。。。。。。
2017-04-04 15:40:56,625 INFO  [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:45) - Choosing bean (struts) for (com.opensymphony.xwork2.security.AcceptedPatternsChecker)

PointConverter's constructor...

四月 04, 2017 3:40:56 下午 org.apache.catalina.startup.HostConfig deployDirectory

信息: Deploying web application directory D:\Work\Java\apache-tomcat-7.0.75-windows-x64\apache-tomcat-7.0.75\webapps\docs

。。。。。。

信息: Server startup in 9584 ms

四月 04, 2017 3:41:01 下午 org.apache.jasper.compiler.TldLocationsCache tldScanJar

信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

2017-04-04 15:41:02,939 WARN  [http-bio-8080-exec-4] log4j2.Log4j2Logger (Log4j2Logger.java:57) - No configuration found for the specified action: 'abstractPropertyAction' in namespace: ''. Form action defaulting to 'action' attribute's literal value.

2017-04-04 15:41:03,230 WARN  [http-bio-8080-exec-4] log4j2.Log4j2Logger (Log4j2Logger.java:57) - No configuration found for the specified action: 'abstractPropertyAction' in namespace: ''. Form action defaulting to 'action' attribute's literal value.

convertFromString...

convertFromString...

convertFromString...

convertFromString...

[Member [id=null, name=12, 
           departments=[
                        Department [name=121, position=java.awt.Point[x=1,y=2], createTime=Tue Apr 04 15:41:01 CST 2017], 
                        Department [name=122, position=java.awt.Point[x=2,y=3], createTime=Tue Apr 04 15:41:02 CST 2017]
                       ]
       ], 
Member [id=null, name=121, 
           departments=[
                        Department [name=1211, position=java.awt.Point[x=11,y=21], createTime=Tue Apr 04 15:41:11 CST 2017], 
                        Department [name=1221, position=java.awt.Point[x=21,y=31], createTime=Tue Apr 04 15:41:12 CST 2017]
                       ]
       ]
]

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