![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWXpPRFV3TWpBNFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTBNRE0wTXpZMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
Servlet的介绍
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTBOakUwTlRFd1AzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
tomcat和servlet 在网络中的位置
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTBOekl5T1RNNFAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
开发Servlet有三种方法: a.实现Servlet接口 基本的方法,可以了解servlet的生命周期,最但由于每次都要实现接口中的所有方法,现已不常用。 b.继承GenericServlet 该方法是个过渡方法,现在也已不常用 c.继承HttpServlet 现在最常用的方法
通过实现servlet接口的方法创建servlet,学习servlet生命周期
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTFNekk0TmpJeVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
时序图
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTFPREF3TWpZMVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
手动创建一个Web应用步骤:
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTFPRFV6TmpVMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTFPVEF6T1RZNVAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UWTFPVEU0TWprMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
servlet的运行过程
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UY3dNek0zT0RjMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)
通过继承httpServlet开发servlet
![servlet 入门基本知识 (二) servlet 入门基本知识 (二)](https://image.shishitao.com:8440/aHR0cHM6Ly93d3cuaXRkYWFuLmNvbS9nby9hSFIwY0RvdkwybHRaeTVpYkc5bkxtTnpaRzR1Ym1WMEx6SXdNVFl3T1RFeU1UY3dOREEzT1RnMlAzZGhkR1Z5YldGeWF5OHlMM1JsZUhRdllVaFNNR05FYjNaTU1rcHpZakpqZFZrelRtdGlhVFYxV2xoUmRpOW1iMjUwTHpWaE5rdzFUREpVTDJadmJuUnphWHBsTHpRd01DOW1hV3hzTDBrd1NrSlJhMFpEVFVFOVBTOWthWE56YjJ4MlpTODNNQzluY21GMmFYUjVMME5sYm5SbGNnPT0%3D.jpg?w=700&webp=1)