[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; `Lr], >aG
} /|?$C7%a\D
int i1=l; h&0zR#t
int i2=mid+1; cC/h7odY
for(int cur=l;cur<=r;cur++){ PgkU~68`
if(i1==mid+1) Ob$``31{s
data[cur]=temp[i2++]; w(oK
else if(i2>r) WNyW1?"
data[cur]=temp[i1++]; [}L~zn6>?a
else if(temp[i1] data[cur]=temp[i1++]; HRf;bKZ
else FNQ<k[#K'~
data[cur]=temp[i2++]; }S> 4.8
} [Hh-F#|R
} &K/?#
i7Qb~RW
} KQ\K:#
.#( vx;
改进后的归并排序: Q-<]'E#\(
6 5govor
package org.rut.util.algorithm.support; %f]#P8VP
y[_k/.1
import org.rut.util.algorithm.SortUtil; (]]hSkE
!xsfhLZK
/** *vb"mB
* @author treeroot vIV|y>;g
* @since 2006-2-2 ,Z{\YAh1
* @version 1.0 8b/$Qp4d
*/ YG\#N+D
public class ImprovedMergeSort implements SortUtil.Sort { QEyL/#Q
2"ax*MQH<^
private static final int THRESHOLD = 10; ;(i6 X)
}Ng P`m
/* *ID=X!v
* (non-Javadoc) N~)-\T:ap
* ]oGd,v X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <`nShP>vl
*/ :j&enP5R(q
public void sort(int[] data) { ~o'1PAW7
int[] temp=new int[data.length]; xUdF.c
mergeSort(data,temp,0,data.length-1); YSD G!
} y7HFmGM
!ho^:}m
private void mergeSort(int[] data, int[] temp, int l, int r) { /QXUD.( 8
int i, j, k; bmG`:_
int mid = (l + r) / 2; z CLaHx!
if (l == r) t`o"K
return; $_.t'8F
if ((mid - l) >= THRESHOLD) 5Tl5T&
mergeSort(data, temp, l, mid); b| L;*<KU
else s#X/ F
insertSort(data, l, mid - l + 1); J M`w6}
if ((r - mid) > THRESHOLD) xi (@\A
mergeSort(data, temp, mid + 1, r); -xtT,^<B
else Df6i*Ko|
insertSort(data, mid + 1, r - mid); ~]KdsT(=_
digc7;8L
for (i = l; i <= mid; i++) { im>(^{{r&
temp = data; qb"S
} si0}b~t
for (j = 1; j <= r - mid; j++) { wps/{h,
temp[r - j + 1] = data[j + mid]; #UM,)bH
} D[$"nc/
int a = temp[l]; CNNqS^ct
int b = temp[r]; [> HKRVy
for (i = l, j = r, k = l; k <= r; k++) { [mtp-4*
if (a < b) { ob7'''i
data[k] = temp[i++]; VX)8pV$
a = temp; @|Pm%K`1
} else { _(m72o0g>>
data[k] = temp[j--]; Pe%[d[k
b = temp[j]; [:X@|,1V!L
} qTuR[(
} Mq> 4!
} S!?T0c?>
:;%Jm
/** V(S7mA:T
* @param data u]*7",R uU
* @param l +<bj}"
* @param i I}8e"#
*/ @ m`C%7<
private void insertSort(int[] data, int start, int len) { bDl:,7;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /M2in]oH
} XM]m%I
} t&U9Z$LS
} d.&_j`\F
} T<]{:\*n
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堆排序： XFhH+4#]
2!%)_<
package org.rut.util.algorithm.support; 3bRxV @0.
:2/L1A)O
import org.rut.util.algorithm.SortUtil; !9d7wPUFr
+g1>h,K 3
/** H!;N0",]N
* @author treeroot oG,>Pk
* @since 2006-2-2 //8W">u
* @version 1.0 7 A0?tG
*/ jF6_yw
public class HeapSort implements SortUtil.Sort{ Jn hdZa
{~apY,3
/* (non-Javadoc) r5j$FwY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G$C2?|V)=
*/ alJ0gc2?
public void sort(int[] data) { WuK<?1meN
MaxHeap h=new MaxHeap(); +`>7cy%cZ
h.init(data); 1H-Wk
for(int i=0;i h.remove(); hDXTC_^s
System.arraycopy(h.queue,1,data,0,data.length); *;Kp"j
} k^7!iOK2
J&6p/'UPZ
private static class MaxHeap{ p3P8@M
P& 1$SWNyW
void init(int[] data){ w:zo \
this.queue=new int[data.length+1]; <K)]kf
for(int i=0;i queue[++size]=data; zjoo;(?D|
fixUp(size); ;+75"=[YT
} 2IYzc3Z{9
} g9C;JmU
VxY]0&sq
private int size=0; "%T~d[M
Luao?;|U
private int[] queue; I"&cr>\
{\>4)TA
public int get() { -VohU-6 |
return queue[1]; YdD; Qx#O
} $:u*)&"t|
YKe&Ph.
public void remove() { -mJs0E*g
SortUtil.swap(queue,1,size--); QFnuu-82"
fixDown(1); XL*M#Jx
} }8#olZ/(q
file://fixdown *(x.egORd
private void fixDown(int k) { ^fF#Ej1
int j; JpXv+V
while ((j = k << 1) <= size) { 9d1km~
if (j < size %26amp;%26amp; queue[j] j++; c =m#MMc)
if (queue[k]>queue[j]) file://不用交换 &[yC M!
break; wH"9N+82M
SortUtil.swap(queue,j,k); 8L[+$g`
k = j; yu_PZ"l
} E$%v);u
} CDJ@Tdp
private void fixUp(int k) { mAlG}<
while (k > 1) { K+Him] b
int j = k >> 1; yl$Ko
if (queue[j]>queue[k]) hp -|a
break; A^aY-V
SortUtil.swap(queue,j,k); C).\ J !
k = j; @Z/jaAjUC
} F w{:shC
} ]v<8l4p;
(H:c80/V
} }hy4EJ
AYf}=t|
} |6So$;`
|>}CoR7
SortUtil： ztU"CRa8
qX}3}TL
package org.rut.util.algorithm; bB4FjC':
2>jk@~Z1:u
import org.rut.util.algorithm.support.BubbleSort; +xuv+mo
import org.rut.util.algorithm.support.HeapSort; X&[Zk5DU*
import org.rut.util.algorithm.support.ImprovedMergeSort; KaEaJ
import org.rut.util.algorithm.support.ImprovedQuickSort; xn, u$@F
import org.rut.util.algorithm.support.InsertSort; <?A4/18K
import org.rut.util.algorithm.support.MergeSort; 7fqQ
import org.rut.util.algorithm.support.QuickSort; +~=a$xA[C
import org.rut.util.algorithm.support.SelectionSort; jA"}\^%3
import org.rut.util.algorithm.support.ShellSort; qz- tXc,
MXW1:
/** j~_iv~[
* @author treeroot Sk EI51]
* @since 2006-2-2 Op0*tj2i),
* @version 1.0 Um/l{:S
*/ xy`Y7W=
public class SortUtil { aUL7]'q}
public final static int INSERT = 1; 7s^b@&Le
public final static int BUBBLE = 2; E$lbm>jsb$
public final static int SELECTION = 3; '7oR|I
public final static int SHELL = 4; l4DBGZB
public final static int QUICK = 5; q=^;lWs4
public final static int IMPROVED_QUICK = 6; Q>L(=j2t
public final static int MERGE = 7; [%^0L~:
public final static int IMPROVED_MERGE = 8; QE/kR!r
public final static int HEAP = 9; /- Gq`9Z
]$#bNt/p
public static void sort(int[] data) { ,~7~ S"
sort(data, IMPROVED_QUICK); 0Fkr3x
} 5voL@w>
private static String[] name={ 6}Y==GPt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [!U%''
}; H%vgPQ8
6,4vs+(|\
private static Sort[] impl=new Sort[]{ Wpf~Ji6||
new InsertSort(), a6zWg7 PN
new BubbleSort(), RQ0^ 1 R
new SelectionSort(), A*BN
new ShellSort(), b81^756
new QuickSort(), `[$>S
new ImprovedQuickSort(), ty5# a
new MergeSort(), :Xy51p`.;]
new ImprovedMergeSort(), n-K/dI
new HeapSort() !>'A2V~F
}; 8nZ_.
nt"\FZ*;3
public static String toString(int algorithm){ Fr50hrtkU
return name[algorithm-1]; mfj%-)l9
} ;a|%W4"
0++RxYFCL
public static void sort(int[] data, int algorithm) { `Cd!
impl[algorithm-1].sort(data); ) YB'W_
} 2iKteJ@h)
E6R\DM
public static interface Sort { kJ%a;p`O
public void sort(int[] data); 4,@jSr|I3i
} "KF]s.
!pj&h0CR
public static void swap(int[] data, int i, int j) { BNk>D|D;
int temp = data; S['rTuk
data = data[j]; |;:Kn*0/]
data[j] = temp; :CqR1_n%
} E<D^j^T
} N[-$*F,:_