Deploy 1.x Jersey WebServices on Tomcat

泪奔，调了两天终于调成了。先说说遇到的问题

Jersey 1.x 和 2.x项目内的config不同，且jersey 2.x 把 com.sun.jersey的路径改成了org.glassfish.jersey，这是最大的坑。笔者一开始没注意，开着1.x的教程用了2.x的包，即使后来发现了这个问题，但由于1.x陷的太深而改不回来了。

同学们会说，那改用1.x的包不就好啦。事实并非那么简单，jersey1.1和1.9的配置也不同，且官方现在只提供1.9的下载，下载下来有N多jar包，好吧，按照教程做，结果tomcat蹦了。仔细查看教程的tomcat版本是6.0，我用的是8.0.

这真是落泪了，变量一路增加，让我真是日了狗的心情都有了，两天调下来真是泪奔，还好最后发现了一篇靠谱的文章，现在来具体说说方法

环境

1. asm-3.1.jar

2. gson-2.3.1.jar

3. jersey-bundle-1.17.1.jar

4. mysql-connector-java-5.1.38-bin.jar

5. Tomcat 8.0

其实真正deploy ws时用到的只有3

项目结构

2. DAO&DTO

package com.qad.yab.dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class CVCJDBC {
	private Connection conn;

	public Connection getConn() throws ClassNotFoundException, SQLException {
		if (null != conn) {
			return conn;
		} else {
			Class.forName("com.mysql.jdbc.Driver");
			conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test1", "cvc", "");
			System.out.println("connect success");
			return conn;
		}
	}
}

package com.qad.yab.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;

import com.qad.yab.dto.User;

public class CVCUserDAO {
	private Connection conn;
	public ArrayList<User> getUsers() throws Exception {
		conn = new CVCJDBC().getConn();
		String sql = "select * from user;";
		PreparedStatement stmt = conn.prepareStatement(sql);
		ResultSet result = stmt.executeQuery();
		ArrayList<User> datas = new ArrayList<User>();
		while (result.next()) {

			User data = new User();
			data.setId(result.getInt("id"));
			data.setLoginID(result.getString("LoginID"));
			data.setName(result.getString("name"));
			data.setEmail(result.getString("email"));
			datas.add(data);
		}
		stmt.close();
		return datas;
	}
}

package com.qad.yab.dto;

public class User {
	private int     id;
    private String  loginID;
    private String  name;
    private String  email;
    private boolean active;

    /**
     * Default constructor to create new user
     */
    public User() {
        super();
    }

    /**
     * Create new user with user name
     *
     * @param name
     *            the login ID
     */
    public User(String loginID) {
        super();
        this.loginID = loginID;
    }

    /**
     * @return the id
     */
    public int getId() {
        return id;
    }

    /**
     * @param id
     *            the id to set
     */
    public void setId(int id) {
        this.id = id;
    }

    /**
     * @return the loginID
     */
    public String getLoginID() {
        return loginID;
    }

    /**
     * @param loginID
     *            the loginID to set
     */
    public void setLoginID(String loginID) {
        this.loginID = loginID;
    }

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name
     *            the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the email
     */
    public String getEmail() {
        return email;
    }

    /**
     * @param email
     *            the email to set
     */
    public void setEmail(String email) {
        this.email = email;
    }

    /**
     * @return the active
     */
    public boolean isActive() {
        return active;
    }

    /**
     * @param active
     *            the active to set
     */
    public void setActive(boolean active) {
        this.active = active;
    }
}

　　4. WebService

package com.qad.yab.ws;

import java.util.ArrayList;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

import com.google.gson.Gson;
import com.qad.yab.dao.CVCUserDAO;
import com.qad.yab.dto.User;

@Path("/webService")
public class UserService {

	@GET
	@Path("/cvcuser")
	@Produces("application/json")
	public String user() throws Exception {
		String users = null;
		CVCUserDAO dao = new CVCUserDAO();
		ArrayList<User> datas = dao.getUsers();
		Gson gson = new Gson();
		users = gson.toJson(datas);

		return users;
	}
}

　　5. web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	id="WebApp_ID" version="3.1">
	<display-name>YAB-CVC-WS</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
	<servlet>
		<servlet-name>ServletService</servlet-name>
		<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer  </servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>ServletService</servlet-name>
		<url-pattern>/REST/*</url-pattern>
	</servlet-mapping>

</web-app>

　　特别需要提醒的是servlet class，使用不同版本的jar包所用的class是不同的T_T，深受其害的飘过

http://localhost:8080/YAB-CVC-WS/REST/webService/cvcuser

YAB-CVC-WS：项目名

REST：URL-PATTERN

webService: 在WS类中有定义

cvcuser: 在WS类中有定义

附解我大坑的文章

http://www.dineshonjava.com/2013/06/restful-web-services-with-jersey-jax-rs.html#.VxCy7Pl96Ul