[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; jI<WzvhYG
} |0R%!v(,
int i1=l; .x?zky^
int i2=mid+1; Ny7=-]N4{"
for(int cur=l;cur<=r;cur++){ nL07^6(
if(i1==mid+1) OVSq8?L
data[cur]=temp[i2++]; Le:mMd= G
else if(i2>r) qq3Qd,$Z
data[cur]=temp[i1++]; U]EuDNkO{
else if(temp[i1] data[cur]=temp[i1++]; zRE8299%z
else UA4d|^ev
data[cur]=temp[i2++]; 4?M3#],'h
} Xb:BIp!e
} fA0=Y,pzv
JgKZ;GM:W
} NV(4wlh)y
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改进后的归并排序: ,W8Iabi^
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package org.rut.util.algorithm.support; @mRrA#E#{
aa%&&
import org.rut.util.algorithm.SortUtil; n9fA!Wic
fy>And*
/** bok 74U]
* @author treeroot yP9wYF^A\
* @since 2006-2-2 }d\Tk(W
* @version 1.0 f3>6:(
*/ v:Z4z6M-
public class ImprovedMergeSort implements SortUtil.Sort { N?{1'=Om
pW--^aHu
private static final int THRESHOLD = 10; +y4AUU:Q
^pV>b(?qw
/* bKMR7&e.Ep
* (non-Javadoc) v;}`?@G
* [xp,&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !5SQN5K
*/ )Z]y.W)
public void sort(int[] data) { 6?.pKFBZ
int[] temp=new int[data.length]; u#@{%kPW
mergeSort(data,temp,0,data.length-1); HGQ?(2]8$
} ^8l3j4
3?Eoj95w!
private void mergeSort(int[] data, int[] temp, int l, int r) { SP?U@w%}
int i, j, k; z>p`!-'ID
int mid = (l + r) / 2; VMye5 P
if (l == r) *:tjxC
return; :Ip:sRz
if ((mid - l) >= THRESHOLD) jM1%6
mergeSort(data, temp, l, mid); ]F*a PV
else CndgfOF
insertSort(data, l, mid - l + 1); 27 145
if ((r - mid) > THRESHOLD) ;!JX-Jq
mergeSort(data, temp, mid + 1, r); Li-(p"
else C| L^Ds0
insertSort(data, mid + 1, r - mid); }wOpPN[4
:{WrS
for (i = l; i <= mid; i++) { 'bI~61{A
temp = data; }B9~X
} {29S`-|P
for (j = 1; j <= r - mid; j++) { #DK3p0d
temp[r - j + 1] = data[j + mid]; waWKpk1Wo
} ^g-t#O lD?
int a = temp[l]; >AzWM .r
int b = temp[r]; +5t bK
for (i = l, j = r, k = l; k <= r; k++) { [&pW&>p3
if (a < b) { 9ze|s^
data[k] = temp[i++]; oS#'u1k
a = temp; {pb9UUP2
} else { lHKf#|
data[k] = temp[j--]; -?YTQ@ W
b = temp[j]; 5%Oyvt]}2
} b~r{J5x@
} W\qLZuQ
} #3Ej0"A@-B
!H1tBg]5
/** rx6-~0!eI=
* @param data A6NxM8ybn+
* @param l ;w6fM
* @param i O%JsUKV
*/ E<<p_hX8R
private void insertSort(int[] data, int start, int len) { Yb%-tv:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .-KtB(t
} ]KXMGH_
} %nmY:}um
} [l':G]
} y5/'!L)g
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堆排序： H\| ]!8w5Z
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package org.rut.util.algorithm.support; K/2.1o;9
{;&B^uz ]
import org.rut.util.algorithm.SortUtil; *j/S4qG
Cl6m$YUt
/** B+Y5b5+wOQ
* @author treeroot Z%+BWS3YqY
* @since 2006-2-2 1X::0;3
* @version 1.0 7k]RO
*/ l 70,Jo?78
public class HeapSort implements SortUtil.Sort{ i>Fvmw
P1i*u0a
/* (non-Javadoc) 1^L`)Up
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JYwyR++uo
*/ >sQ2@"y)s2
public void sort(int[] data) { w!WRa8C
MaxHeap h=new MaxHeap(); a(@p0YpKT
h.init(data); =9pw uH
for(int i=0;i h.remove(); Pknc[h},
System.arraycopy(h.queue,1,data,0,data.length); |As2"1_f
} H\fcY p6
Sk/#J!T8{
private static class MaxHeap{ (S k#x
]^:hyOK
void init(int[] data){ Re*|$r#
this.queue=new int[data.length+1]; &:c:9w
for(int i=0;i queue[++size]=data; F<Hqo>G
fixUp(size); 4L5o\'X
} ieo|%N{'
} #M5_em4kN
i s L{9^
private int size=0; {[2tG U9
}pMP!%|
private int[] queue; "F-Y^
E &7@#'l
public int get() { c6Lif)4
return queue[1]; l#D-q/k?
} z wL3,!t
A3AP51 !
public void remove() { Mo}H_8y
SortUtil.swap(queue,1,size--); T&r +G!2
fixDown(1); N%9h~G
} 1$$37?FE
file://fixdown 5M%,N-P^
private void fixDown(int k) { G HD^%)T5^
int j; d/XlV]#2x\
while ((j = k << 1) <= size) { A7k'K4
if (j < size %26amp;%26amp; queue[j] j++; O)`fvpVU
if (queue[k]>queue[j]) file://不用交换 d5DP^u
break; $]@O/[
SortUtil.swap(queue,j,k); gbm0H-A:*
k = j; }B y)y;~
} 3{N\A5~
} }A{_L6qx
private void fixUp(int k) { of9q"h
while (k > 1) { ~~PgF"v
int j = k >> 1; M@|w[ydQG
if (queue[j]>queue[k]) J &!B|TS
break; S|"Fgoj r
SortUtil.swap(queue,j,k); fNkuX-om
k = j; C"6Amnj
} L@w0N)P<!{
} /7bw: h;
ht?CHUu
} /ZHO>LNN|
D"L|"qJ
} cV-i*L4X
P7z:3o.
SortUtil： VS?dvZ1cC
P: n#S%
package org.rut.util.algorithm; D7)(D4S4
Aj,]n>{
import org.rut.util.algorithm.support.BubbleSort; ],n%Xp
import org.rut.util.algorithm.support.HeapSort; a`#S|'oatC
import org.rut.util.algorithm.support.ImprovedMergeSort; 0pD W _
import org.rut.util.algorithm.support.ImprovedQuickSort; 1h2H1gy5I3
import org.rut.util.algorithm.support.InsertSort; Vo%Yf9C
import org.rut.util.algorithm.support.MergeSort; *|mz_cKu
import org.rut.util.algorithm.support.QuickSort; kLJlS,nh\r
import org.rut.util.algorithm.support.SelectionSort; wG+=}1X
import org.rut.util.algorithm.support.ShellSort; o]A XT8
;Xqn-R
/** =f>HiF
* @author treeroot B={/nC}G~
* @since 2006-2-2 E*BSfn&i
* @version 1.0 W9dYljnZ8i
*/ q69H^E=
public class SortUtil { Y;} 2'"
public final static int INSERT = 1; yz?q(]
public final static int BUBBLE = 2; @rF/]UJ
public final static int SELECTION = 3; 1!!\+ c2*
public final static int SHELL = 4; RU6KIg{H
public final static int QUICK = 5; Jy9bY
public final static int IMPROVED_QUICK = 6; r*chL&7
public final static int MERGE = 7; dLZjB(0eO
public final static int IMPROVED_MERGE = 8; 0h22V$
public final static int HEAP = 9; >9=:sSQu
Qm< gb+
public static void sort(int[] data) { +@0TMK,P
sort(data, IMPROVED_QUICK); yO=p3PV d
} r@iASITX
private static String[] name={ u)v$JpNE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !i^]UN
}; }qAVN
|Ab{H%
private static Sort[] impl=new Sort[]{ ibXe"X/_
new InsertSort(), Txo@U
new BubbleSort(), c5("-xB
new SelectionSort(), ~b Rd)1
new ShellSort(), [(|^O>k8c
new QuickSort(), g5y;?fqJ
new ImprovedQuickSort(), JkU1daTe
new MergeSort(), [Eu];
new ImprovedMergeSort(), ltoqtB\s
new HeapSort() r0\?WoF2C
}; bj}=8k0
Vv8_\^g]
public static String toString(int algorithm){ /PXioiGcs
return name[algorithm-1]; zie=2
} <W*xshn
g`[`P@
public static void sort(int[] data, int algorithm) { yyP'Z~0
impl[algorithm-1].sort(data); j$vK<SF
} Ra[>P _
dx@QWTNE
public static interface Sort { M;KA]fmc
public void sort(int[] data); rgqQxe=
} 94Ud@F9d5
'a#mViPTQ)
public static void swap(int[] data, int i, int j) { f"Vgefk
int temp = data; A "S/^<
data = data[j]; %&+TbDE+T
data[j] = temp; P]Xbjs<p
} 1CkdpYjsj
} 1{Jb"