![](\"http:\/\/m3.img.libdd.com\/farm5\/2013\/0316\/13\/1BC31930BB6D10BDD0D0B95C227516D1FE9F262C06000_265_382.JPEG\")
\u65b0\u5efaIdentityServlet\u7c7b\uff1a<\/p>\n
eclipse \u5b89\u88c5m2eclipse\u63d2\u4ef6\uff0c\u5b89\u88c5\u5b8c\u6bd5\u540e\uff0c\u65b0\u5efa\u4e00\u4e2awebapp maven\u9879\u76ee\uff0c\u9879\u76ee\u76ee\u5f55\u5982\u4e0b\uff1a
\u65b0\u5efaIdentityServlet\u7c7b\uff1a<\/p>\n
<\/p>\n
package com.yeetrack.servlet;\n\nimport java.awt.Color;\nimport java.awt.Font;\nimport java.awt.Graphics2D;\nimport java.awt.image.BufferedImage;\nimport java.io.IOException;\nimport java.util.Random;\n\nimport javax.servlet.ServletException;\nimport javax.servlet.ServletOutputStream;\nimport javax.servlet.http.HttpServlet;\nimport javax.servlet.http.HttpServletRequest;\nimport javax.servlet.http.HttpServletResponse;\n\nimport com.sun.image.codec.jpeg.JPEGCodec;\nimport com.sun.image.codec.jpeg.JPEGImageEncoder;\npublic class IdentityServlet extends HttpServlet\n{\n\n private static final long serialVersionUID = 4745835569705949574L;\n\n private static final char[] CHARS = {'1', '2', '3', '4', '5', '6', '7', '8', '9', '0'}; \/\/\u8bbe\u7f6e\u9a8c\u8bc1\u7801\u5b57\u7b26\n private static Random random = new Random();\n \/**\n * \u83b7\u53d6\u56db\u4f4d\u968f\u673a\u9a8c\u8bc1\u7801\n * @return\n *\/\n private static String getRandomString()\n {\n StringBuffer buffer = new StringBuffer();\n for(int i=1;i<=4;i++)\n buffer.append(CHARS[random.nextInt(CHARS.length)]);\n return buffer.toString();\n }\n \/\/\u968f\u673a\u83b7\u53d6\u989c\u8272\n private static Color getRandomColor()\n {\n return new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255));\n }\n private static Color getReverseColor(Color c)\n {\n return new Color(255-c.getRed(), 255-c.getGreen(), 255-c.getBlue());\n }\n\n @Override\n protected void doGet(HttpServletRequest req, HttpServletResponse resp)\n throws ServletException, IOException\n {\n \/\/ TODO Auto-generated method stub\n resp.setCharacterEncoding("utf-8");\n resp.setContentType("image\/jpeg");\n String randomString = getRandomString();\n req.getSession(true).setAttribute("random", randomString);\n\n int width = 100;\n int height = 30;\n\n Color color = getRandomColor();\n Color reverse = getReverseColor(color);\n\n BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);\n Graphics2D g = bi.createGraphics();\n g.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 16));\n g.setColor(color);\n g.fillRect(0, 0, width, height);\n g.setColor(reverse);\n g.drawString(randomString, 18, 20);\n for(int i=0,n=random.nextInt(100);i<n;i++)\n g.drawRect(random.nextInt(width), random.nextInt(height),1,1);\n\n ServletOutputStream out = resp.getOutputStream();\n JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);\n encoder.encode(bi);\n out.flush();\n }\n\n @Override\n protected void doPost(HttpServletRequest req, HttpServletResponse resp)\n throws ServletException, IOException\n {\n \/\/ TODO Auto-generated method stub\n super.doPost(req, resp);\n }\n}\n<\/code><\/pre>\nmaven\u7684pom.xml\u5982\u4e0b\uff1a<\/p>\n
<project xmlns="http:\/\/maven.apache.org\/POM\/4.0.0" xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance"\nxsi:schemaLocation="http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/maven-v4_0_0.xsd">\n<modelVersion>4.0.0<\/modelVersion>\n<groupId>com.yeetrack<\/groupId>\n<artifactId>mavenWeb<\/artifactId>\n<packaging>war<\/packaging>\n<version>0.0.1-SNAPSHOT<\/version>\n<name>mavenWeb Maven Webapp<\/name>\n<url>http:\/\/maven.apache.org<\/url>\n<dependencies>\n<dependency>\n <groupId>junit<\/groupId>\n <artifactId>junit<\/artifactId>\n <version>3.8.1<\/version>\n <scope>test<\/scope>\n<\/dependency>\n\n<dependency>\n<groupId>org.apache.maven<\/groupId>\n<artifactId>maven-plugin-api<\/artifactId>\n<version>3.0.5<\/version>\n\n<\/dependency>\n<dependency>\n <groupId>org.apache.geronimo.specs<\/groupId>\n <artifactId>geronimo-servlet_2.5_spec<\/artifactId>\n <version>1.2<\/version>\n<\/dependency>\n\n\n<\/dependencies>\n<build>\n<finalName>mavenWeb<\/finalName>\n<plugins>\n<plugin>\n <groupId>org.mortbay.jetty<\/groupId>\n <artifactId>maven-jetty-plugin<\/artifactId>\n <version>6.1.10<\/version>\n <configuration>\n <stopPort>9966<\/stopPort>\n <stopKey>foo<\/stopKey> \n <\/configuration>\n<\/plugin>\n<\/plugins>\n<\/build>\n<\/project>\n<\/code><\/pre>\n\u9879\u76eeweb.xml\u914d\u7f6e\u5982\u4e0b\uff1a
23.dtd" ><\/p>\n
<web-app>\n<display-name>Archetype Created Web Application<\/display-name>\n<servlet>\n <servlet-name>identityServlet<\/servlet-name>\n <servlet-class>com.yeetrack.servlet.IdentityServlet<\/servlet-class>\n<\/servlet>\n<servlet-mapping>\n <servlet-name>identityServlet<\/servlet-name>\n <url-pattern>\/servlet\/idetityget<\/url-pattern>\n<\/servlet-mapping>\n<\/web-app>\n<\/code><\/pre>\n