坦克大战（一期）-设计模式-责任链模式之模放servlet的调用顺序

src/main/java/com/msb/chain/servlet/v1/Filter.java

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+package com.msb.chain.servlet.v1;
+
+/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+public interface Filter {
+    public void doFilter(Request request, Response response);
+}

src/main/java/com/msb/chain/servlet/v1/FilterChain.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:09
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *@ClassName ChainFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:09
+ *@Version 3.0
+ */
+public class FilterChain implements Filter {
+    private List<Filter> filters = new ArrayList<>();
+
+    public FilterChain addFilter(Filter filter) {
+        filters.add(filter);
+        return this;
+    }
+
+    @Override
+    public void doFilter(Request request, Response response) {
+        for (Filter filter : filters) {
+            filter.doFilter(request, response);
+        }
+    }
+}

src/main/java/com/msb/chain/servlet/v1/Main.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:11
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Main
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:11
+ *@Version 3.0
+ */
+public class Main {
+    public static void main(String[] args) {
+        FilterChain chain = new FilterChain();
+        Request request = new Request();
+        request.setStr("request:");
+        Response response = new Response();
+        response.setStr("response:");
+
+        chain.addFilter(new OneFilter()).addFilter(new TwoFilter());
+        chain.doFilter(request, response);
+        System.out.println(request.getStr());
+        System.out.println(response.getStr());
+    }
+}

src/main/java/com/msb/chain/servlet/v1/OneFilter.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName HtmlFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:05
+ *@Version 3.0
+ */
+public class OneFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response) {
+        request.setStr(request.getStr() + "-OneFilter");
+        response.setStr(response.getStr() + "-OneFilter");
+    }
+}

src/main/java/com/msb/chain/servlet/v1/Request.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Request {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v1/Response.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Response {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v1/TwoFilter.java

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+package com.msb.chain.servlet.v1;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:08
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName TwoFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:08
+ *@Version 3.0
+ */
+public class TwoFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response) {
+        request.setStr(request.getStr() + "-TwoFilter");
+        response.setStr(response.getStr() + "-TwoFilter");
+    }
+}

src/main/java/com/msb/chain/servlet/v3/Filter.java

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+package com.msb.chain.servlet.v3;
+
+/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+public interface Filter {
+    public void doFilter(Request request, Response response, FilterChain chain);
+}

src/main/java/com/msb/chain/servlet/v3/FilterChain.java

@@ -0,0 +1,35 @@
+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:09
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *@ClassName ChainFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:09
+ *@Version 3.0
+ */
+public class FilterChain implements Filter {
+    private List<Filter> filters = new ArrayList<>();
+    private int index = 0;
+
+    public FilterChain addFilter(Filter filter) {
+        filters.add(filter);
+        return this;
+    }
+
+    @Override
+    public void doFilter(Request request, Response response, FilterChain chain) {
+        if(index == filters.size()) return;
+        Filter filter = filters.get(index);
+        index++;
+        filter.doFilter(request, response, chain);
+        return;
+    }
+}

src/main/java/com/msb/chain/servlet/v3/Main.java

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+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:11
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Main
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:11
+ *@Version 3.0
+ */
+public class Main {
+    public static void main(String[] args) {
+        FilterChain chain = new FilterChain();
+        Request request = new Request();
+        request.setStr("request:");
+        Response response = new Response();
+        response.setStr("response:");
+
+        chain.addFilter(new OneFilter()).addFilter(new TwoFilter());
+        chain.doFilter(request, response, chain);
+        System.out.println(request.getStr());
+        System.out.println(response.getStr());
+    }
+}

src/main/java/com/msb/chain/servlet/v3/OneFilter.java

@@ -0,0 +1,22 @@
+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName HtmlFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:05
+ *@Version 3.0
+ */
+public class OneFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response, FilterChain chain) {
+        request.setStr(request.getStr() + "-OneFilter");
+        chain.doFilter(request, response, chain);
+        response.setStr(response.getStr() + "-OneFilter");
+    }
+}

src/main/java/com/msb/chain/servlet/v3/Request.java

@@ -0,0 +1,25 @@
+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Request {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v3/Response.java

@@ -0,0 +1,25 @@
+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Response {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v3/TwoFilter.java

@@ -0,0 +1,22 @@
+package com.msb.chain.servlet.v3;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:08
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName TwoFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:08
+ *@Version 3.0
+ */
+public class TwoFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response, FilterChain chain) {
+        request.setStr(request.getStr() + "-TwoFilter");
+        chain.doFilter(request, response, chain);
+        response.setStr(response.getStr() + "-TwoFilter");
+    }
+}

src/main/java/com/msb/chain/servlet/v4/Filter.java

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+package com.msb.chain.servlet.v4;
+
+/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+public interface Filter {
+    public void doFilter(Request request, Response response, FilterChain chain);
+}

src/main/java/com/msb/chain/servlet/v4/FilterChain.java

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+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:09
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *@ClassName ChainFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:09
+ *@Version 3.0
+ */
+public class FilterChain {
+    private List<Filter> filters = new ArrayList<>();
+    private int index = 0;
+
+    public FilterChain addFilter(Filter filter) {
+        filters.add(filter);
+        return this;
+    }
+
+    public void doFilter(Request request, Response response) {
+        if(index == filters.size()) return;
+        Filter filter = filters.get(index);
+        index++;
+        filter.doFilter(request, response, this);
+        return;
+    }
+}

src/main/java/com/msb/chain/servlet/v4/Main.java

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+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:11
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Main
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:11
+ *@Version 3.0
+ */
+public class Main {
+    public static void main(String[] args) {
+        FilterChain chain = new FilterChain();
+        Request request = new Request();
+        request.setStr("request:");
+        Response response = new Response();
+        response.setStr("response:");
+
+        chain.addFilter(new OneFilter()).addFilter(new TwoFilter());
+        chain.doFilter(request, response);
+        System.out.println(request.getStr());
+        System.out.println(response.getStr());
+    }
+}

src/main/java/com/msb/chain/servlet/v4/OneFilter.java

@@ -0,0 +1,22 @@
+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:05
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName HtmlFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:05
+ *@Version 3.0
+ */
+public class OneFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response, FilterChain chain) {
+        request.setStr(request.getStr() + "-OneFilter");
+        chain.doFilter(request, response);
+        response.setStr(response.getStr() + "-OneFilter");
+    }
+}

src/main/java/com/msb/chain/servlet/v4/Request.java

@@ -0,0 +1,25 @@
+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Request {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v4/Response.java

@@ -0,0 +1,25 @@
+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:04
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName Request
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:04
+ *@Version 3.0
+ */
+public class Response {
+    private String str;
+
+    public String getStr() {
+        return str;
+    }
+
+    public void setStr(String str) {
+        this.str = str;
+    }
+}

src/main/java/com/msb/chain/servlet/v4/TwoFilter.java

@@ -0,0 +1,22 @@
+package com.msb.chain.servlet.v4;/**
+ * @Author bingor
+ * @Date 2022/10/18 10:08
+ * @Description: com.msb.chain.servlet.v1
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName TwoFilter
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/18 10:08
+ *@Version 3.0
+ */
+public class TwoFilter implements Filter {
+    @Override
+    public void doFilter(Request request, Response response, FilterChain chain) {
+        request.setStr(request.getStr() + "-TwoFilter");
+        chain.doFilter(request, response);
+        response.setStr(response.getStr() + "-TwoFilter");
+    }
+}