[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; ,8'>R@o
} @D^^_1~
int i1=l; u^Ku;RQo
int i2=mid+1; Uh eC
for(int cur=l;cur<=r;cur++){ oTjyN\?H
if(i1==mid+1) 2NGeC0=
data[cur]=temp[i2++]; p/Sbt/R
else if(i2>r) :'L2J
data[cur]=temp[i1++]; URgk^nt2p
else if(temp[i1] data[cur]=temp[i1++]; 7R.Q Ql
else EI~"L$?
data[cur]=temp[i2++]; .jw}JJ
} {]*x*aa\
} rHge~nY<
/&#XhrT
} lA(Q@yEW
/'2O.d0}.
改进后的归并排序: ) /vhclkb
8F(h*e_?
package org.rut.util.algorithm.support; C;+(Zp
@Hb'8F
import org.rut.util.algorithm.SortUtil; fc=Patg
:#E*Y8-
/** @:0ddb71
* @author treeroot @!N-RQ&A
* @since 2006-2-2 bu7'oB~:V^
* @version 1.0 2aZw[7s
*/ %_-zWVJ
public class ImprovedMergeSort implements SortUtil.Sort { 9h90huyKF
#m{{a]zm^
private static final int THRESHOLD = 10; 8M*PML4r
rPNb\Ri
/* 63|+2-E2Q
* (non-Javadoc) BcjP+$k4_
* ^mWybPqx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8b.u'r174
*/ WW2Ob*
public void sort(int[] data) { <:FP4e "(
int[] temp=new int[data.length]; u=F+(NE"
mergeSort(data,temp,0,data.length-1); \6?A!w~6
} #o/H~Iv
#ge)2
private void mergeSort(int[] data, int[] temp, int l, int r) { \@3Qi8u//
int i, j, k; 9Ya<My
int mid = (l + r) / 2; 1 2++RkL#
if (l == r) up3O|lj4
return; -4rDbDsr
if ((mid - l) >= THRESHOLD) kd:$oS_*s
mergeSort(data, temp, l, mid); #PDf,^
else HjqB^|z
insertSort(data, l, mid - l + 1); ,B(7\
if ((r - mid) > THRESHOLD) /iNa'W5\
mergeSort(data, temp, mid + 1, r); >h2%[j=
else uJHu>M}~
insertSort(data, mid + 1, r - mid); v[@c*wo
-!;l~#K=
for (i = l; i <= mid; i++) { G&xo1K]
temp = data; hv6@Jr3
} _Y=2/*y^
for (j = 1; j <= r - mid; j++) { <^~FLjsfg
temp[r - j + 1] = data[j + mid]; _I`,Br:N
} heaRX4
int a = temp[l]; U-k+9f 0
int b = temp[r]; P&d"V<
for (i = l, j = r, k = l; k <= r; k++) { b*;"q9u5
if (a < b) { 2$_9cF Wm
data[k] = temp[i++]; ^,F;M`[
a = temp; 6$a$K,dZ
} else { ;=j@, yu
data[k] = temp[j--]; k:2QuG^
b = temp[j]; C3hv*
} x^|Vaf
} IEjP<pLe
} pL1Q7&&c0
6iEhsL&K
/** zf4Ec-)
* @param data fPi3sb`}
* @param l \T]EZ'+O
* @param i f\+fo
*/ Iz6y{E
private void insertSort(int[] data, int start, int len) { #j#_cImE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |py6pek|
} uPYmHA}_/
} gj\)CBOv
} 9!9Z~/*m
} W3vi@kb]
!3iGz_y
堆排序： ;!91^Tl
k4qp u=@U
package org.rut.util.algorithm.support; \Gm-MpW
%p^.\ch9
import org.rut.util.algorithm.SortUtil; l$K,#P<)
AM"Nn L"
/** 4!asT;`'
* @author treeroot Q6o(']0
* @since 2006-2-2 ZT02"3F
* @version 1.0 `r5$LaD
*/ T5Q{{@Q
public class HeapSort implements SortUtil.Sort{ 'Y$R~e^Y?
`c/*H29
/* (non-Javadoc) -/_L*oYli
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AC O)Dt(Y
*/ GV)<Q^9
public void sort(int[] data) { 2fU$J>Y
MaxHeap h=new MaxHeap(); !zPG?q]3
h.init(data); "dR|[a<#g
for(int i=0;i h.remove(); <APB11
System.arraycopy(h.queue,1,data,0,data.length); mrm^e9*Z
} >FhK#*Pa
,f}UGd[a
private static class MaxHeap{ ug{R 3SS
22kpl)vbU
void init(int[] data){ 2,lqsd:xM
this.queue=new int[data.length+1]; "#v=IJy&r
for(int i=0;i queue[++size]=data; vHAg-Avc
fixUp(size); wU#F_De)R:
} k>dsw:
} ^gVT$A
8Qh#)hiW!
private int size=0; $Vc~/>
ut>4U'.H
private int[] queue; v7%X@j]ji
t9&cE:n
public int get() { 0Io'bF
return queue[1]; .nYUL>
} #jAqra._b
UgWs{y2SE.
public void remove() { nR4y`oP+
SortUtil.swap(queue,1,size--); :{NC-%4o0
fixDown(1); f84:hXo6
} ,uzN4_7u
file://fixdown *. 3N=EO
private void fixDown(int k) { fzjU<?}
int j; X7,PEA
while ((j = k << 1) <= size) { Q'k\8'x
if (j < size %26amp;%26amp; queue[j] j++; [4fU+D2\d
if (queue[k]>queue[j]) file://不用交换 iK?b~Q
break; i,13b e
SortUtil.swap(queue,j,k); Z%GTnG|rG
k = j; -XRn~=5
} 3nY1[,
} }HE6aF62O
private void fixUp(int k) { sC[yI Up
while (k > 1) { JFgoN,xn
int j = k >> 1; Bl9jkq ]
if (queue[j]>queue[k]) {lth+{&L#
break; `mye}L2I
SortUtil.swap(queue,j,k); CG'.:`t
k = j; lpH=2l$>?
} Ro2d,'
} `h}q Eo`
9N%JP+<89
} H _Va"yTO6
nhG J
} "O8gJ0e
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SortUtil： Hi_G
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package org.rut.util.algorithm; $A3<G-4O
/6O??6g
import org.rut.util.algorithm.support.BubbleSort; 1FtM>&%4
import org.rut.util.algorithm.support.HeapSort; uxg9yp@|
import org.rut.util.algorithm.support.ImprovedMergeSort; X0-IRJ[
import org.rut.util.algorithm.support.ImprovedQuickSort; dD<fn9t
import org.rut.util.algorithm.support.InsertSort; lnE+Au'
import org.rut.util.algorithm.support.MergeSort; -@>BHC
import org.rut.util.algorithm.support.QuickSort; < j$#9QQ1
import org.rut.util.algorithm.support.SelectionSort; "RVcA",
import org.rut.util.algorithm.support.ShellSort; X7L8h'(@
m]*Bx%-1c
/** vK$"# F~
* @author treeroot *5<Sr q'
* @since 2006-2-2 1 nvTce
* @version 1.0 '8Phxx|
*/ |*RYq2y
public class SortUtil { A]L%dFK
public final static int INSERT = 1; ??hJEE
public final static int BUBBLE = 2; %+ZJhHT
public final static int SELECTION = 3; $,xnU.n
public final static int SHELL = 4; bqanFQj
public final static int QUICK = 5; O4<g%.HC6
public final static int IMPROVED_QUICK = 6; a?yMHb{F
public final static int MERGE = 7; yT{8d.Rh
public final static int IMPROVED_MERGE = 8; 2iu_pjj
public final static int HEAP = 9; vpPl$ga5bY
E,n}HiAz7V
public static void sort(int[] data) { $8l({:*q0
sort(data, IMPROVED_QUICK); Wlh~)
} B*htN
private static String[] name={ R(j1n,c]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D@EO=08<b
}; ,Ma.V\T[
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private static Sort[] impl=new Sort[]{ 4/X/>Y1
new InsertSort(), ^$%Z!uz
new BubbleSort(), )Qm[[pnj
new SelectionSort(), "uLjIIl
new ShellSort(), )XQ`M?**M
new QuickSort(), ?muzU.h"z
new ImprovedQuickSort(), B= keBO](@
new MergeSort(), %LXM+<N8
new ImprovedMergeSort(), "o& E2#
new HeapSort() s95vK7I
}; {b]aC
_md=Q$9!m
public static String toString(int algorithm){ UN"(5a8.
return name[algorithm-1]; s<x1>Q7X~
} nS()u}c;r
U $Qv>7
public static void sort(int[] data, int algorithm) { Hn,:`mj4-6
impl[algorithm-1].sort(data); ,fEO> i
} Z -%(~
61U<5:#l
public static interface Sort { Cw5%\K$=
public void sort(int[] data); R~bC,`Bh
} ,n!vsIN
a:~@CUD >I
public static void swap(int[] data, int i, int j) { _w@qr\4i=
int temp = data; "QoQ4r<|
data = data[j]; 3cj3u4y
data[j] = temp; !? ^h;)a
} P?BGBbC
} {f9{8-W<u