[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; jN31hDg<z
} ^EELaG
int i1=l; y [#pC<^
int i2=mid+1; WWKvh
for(int cur=l;cur<=r;cur++){ 6$U]9D
if(i1==mid+1) q:\g^_!OGA
data[cur]=temp[i2++]; 2P#=a?~[
else if(i2>r) O.`Jl%
data[cur]=temp[i1++]; nDS}^Ba
else if(temp[i1] data[cur]=temp[i1++]; q h/F
else Z@a9mFI?
data[cur]=temp[i2++]; xu5ia|gYz7
} lot%N(mB`
} v+7kU=
VKp*9%9
} pM;vH]|
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改进后的归并排序: 9,uhfb^]
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package org.rut.util.algorithm.support; W>_]dPBS/
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import org.rut.util.algorithm.SortUtil; r={c,i
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/** Od+6 -J
* @author treeroot ,.iRnR
* @since 2006-2-2 &|>S|
* @version 1.0 K<?nq0-
*/ '* mH*?Y
public class ImprovedMergeSort implements SortUtil.Sort { XU!2YO)t;!
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private static final int THRESHOLD = 10; :B3[:MpL}
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/* oSiMpQu08
* (non-Javadoc) {3;AwhN0H
* :w}{$v}#D;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) valtev0<
*/ mxor1P#|
public void sort(int[] data) { |*Z$E$k:
int[] temp=new int[data.length]; D\IjyZ-O
mergeSort(data,temp,0,data.length-1); 'iLpE7
} 8!.ojdyn
l/;X?g5+
private void mergeSort(int[] data, int[] temp, int l, int r) { mF` B#
int i, j, k; n>@oBG)!
int mid = (l + r) / 2; N0hE4t
if (l == r) NM ]bgpP
return; (&/2\0QV
if ((mid - l) >= THRESHOLD) f0Bto/,>~
mergeSort(data, temp, l, mid); 8XbA'% o
else 8r3A~
insertSort(data, l, mid - l + 1); + QQS={
if ((r - mid) > THRESHOLD) G)?9.t_Lj-
mergeSort(data, temp, mid + 1, r); ]HpA5q1ck
else KNH1#30 K
insertSort(data, mid + 1, r - mid); hiNEJ_f
f~}H
for (i = l; i <= mid; i++) { 6e&>rq6C
temp = data; Mq';S^
} wAnb Di{W
for (j = 1; j <= r - mid; j++) { R|i/lEq
temp[r - j + 1] = data[j + mid]; >X*Mio8P#
} C6rg<tCH
int a = temp[l]; J\e+}{
int b = temp[r]; qzb<J=FAU
for (i = l, j = r, k = l; k <= r; k++) { &89oO@5
if (a < b) { /x3/Ubmz~x
data[k] = temp[i++]; q^6+!&"
a = temp; +F dB '
} else { ZvcJK4hi
data[k] = temp[j--]; ;WldHaZ9r
b = temp[j]; qCv20#!"|
} @LJpdvb
} &+G"k~%
} EbqcV\Kb
bXS:x
/** ~axjjv
* @param data :O5og[;b
* @param l ? w^-
* @param i u,3#M ~
*/ V2N_8)s9W
private void insertSort(int[] data, int start, int len) { 4lZ$;:Jg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {[+2n]f_G
} u ElAnrm
} iOG[>u0h
} NV#FvM/#"
} `9 {mr<
_V\Bp=9W
堆排序： ZY:[ekm%4Z
Iy }:F8F>g
package org.rut.util.algorithm.support; SXt{k<|
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import org.rut.util.algorithm.SortUtil; %$TGzK1
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/** Ko^c|}mh*!
* @author treeroot hHDOWHWE
* @since 2006-2-2 X6^},C'E.:
* @version 1.0 ApjOj/
*/ v(pmIb{
public class HeapSort implements SortUtil.Sort{ j^`hzh3S
Uo-`>7
/* (non-Javadoc) d:F @a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zy_V9j[n
*/ "]-Xmdk09
public void sort(int[] data) { VM0j`bs'K*
MaxHeap h=new MaxHeap(); .$#rV?7
h.init(data); =w$}m_AM
for(int i=0;i h.remove(); U"50_O
System.arraycopy(h.queue,1,data,0,data.length); 5y?-fT]X
} Y F*OU"2U
Reu*Pe
private static class MaxHeap{ kHqztg
2./3 \n2
void init(int[] data){ D_8x6`z
this.queue=new int[data.length+1]; 1nu^F,M
for(int i=0;i queue[++size]=data; SI8%M=P>
fixUp(size); %sRUh0AL
} GHmv} Z
} S~Id5T:,
*FJZiPy
private int size=0; BT@r!>Nl
\.g\Zib )
private int[] queue; qL94SW;
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public int get() { 1J'3g
return queue[1]; XbQlHfrS
} yOvm`9
K x~|jq
public void remove() { c_" ~n|
SortUtil.swap(queue,1,size--); x1ztfJd
fixDown(1); n k2om$nN
} 3T&6opaF
file://fixdown Lq>&d,F06)
private void fixDown(int k) { 03j]d&P%d
int j; %N#%|2B
while ((j = k << 1) <= size) { Zec <m8~
if (j < size %26amp;%26amp; queue[j] j++; Ks\ NE=;5
if (queue[k]>queue[j]) file://不用交换 AO UL^$&
break; *]i!fzI']
SortUtil.swap(queue,j,k); \qUKP"dr
k = j; 0dh=fcb
} sm$(Y.N
} `f'K@
private void fixUp(int k) { 1[]&(Pa
while (k > 1) { 1 n%?l[o
int j = k >> 1; 07Edfe
if (queue[j]>queue[k]) BW,mwq
break; ( 9]_ HW[
SortUtil.swap(queue,j,k); . <tq61
k = j; SIKOFs
} jP~Z`yf
} BIj=!!
P4Th_B7
} eznypY=
W0=O+0$^
} ai*f F
O 1oxZj <
SortUtil： ,hVvve,j}
KzQ3.)/q
package org.rut.util.algorithm; <40rYr$/J
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import org.rut.util.algorithm.support.BubbleSort; c"n?'e
import org.rut.util.algorithm.support.HeapSort; kg`.[{k
import org.rut.util.algorithm.support.ImprovedMergeSort; ;=? ~ -_
import org.rut.util.algorithm.support.ImprovedQuickSort; FW"^99mrnb
import org.rut.util.algorithm.support.InsertSort; 76vy5R(.
import org.rut.util.algorithm.support.MergeSort; ejA%%5q
import org.rut.util.algorithm.support.QuickSort; }$\M{#C~
import org.rut.util.algorithm.support.SelectionSort; %AN/>\#p
import org.rut.util.algorithm.support.ShellSort; iVfgDo
` gW<M
/** w{dIFvQ"$
* @author treeroot X{kpSA~
* @since 2006-2-2 ^2wLxXO6
* @version 1.0 <|?K%FP7Z
*/ H\1qI7N C
public class SortUtil { 8UkKU_Uso
public final static int INSERT = 1; v=95_l
public final static int BUBBLE = 2; '$ef+@y
public final static int SELECTION = 3; }oJAB1'k
public final static int SHELL = 4; A^2L~g[^Q
public final static int QUICK = 5; {iG@U=>
public final static int IMPROVED_QUICK = 6; mQ}ny(K'
public final static int MERGE = 7; *MI*Rz?4
public final static int IMPROVED_MERGE = 8; k0Ek:MjJr
public final static int HEAP = 9; U}$DhA"r"
s6o>m*{
public static void sort(int[] data) { Rte+(- iL
sort(data, IMPROVED_QUICK); $W;b{H=F
} d`d0N5\
private static String[] name={ Y qcD-K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {RB-lfrWs
}; p h[\)
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private static Sort[] impl=new Sort[]{ =e?$M
new InsertSort(), 'lZ.j&
new BubbleSort(), )IT6vU"-yd
new SelectionSort(), Npn=cLC&
new ShellSort(), [\R>Xcu>
new QuickSort(), }`yiT<z
new ImprovedQuickSort(), IaFr&
new MergeSort(), 1nPZ<^A&@
new ImprovedMergeSort(), [Vf}NF
new HeapSort() Y\2|x*KwvF
}; ^%y`u1ab
mCKk*5ws5"
public static String toString(int algorithm){ bXM/2Z?6
return name[algorithm-1]; HI&kP+,y
} u1K\@jlw
2k#t .-
public static void sort(int[] data, int algorithm) { z2/!m[U
impl[algorithm-1].sort(data); em2_pq9q
} `#IcxweA
> 7`&0?
public static interface Sort { Y@F
public void sort(int[] data); P"7ow-
} |sgXh9%x<
&S74mV
public static void swap(int[] data, int i, int j) { >qT'z$
int temp = data; @{Py%
data = data[j]; j nwQV
data[j] = temp; o4=Yu7L
} iz}sM>^
} )WR_ ug