[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; .WeP]dX%:f
} %BV2 q
int i1=l; )'pc1I
int i2=mid+1; :f9O3QA
for(int cur=l;cur<=r;cur++){ c+_F}2)
if(i1==mid+1) 0qdgt
data[cur]=temp[i2++]; heF<UMI
else if(i2>r) QAI!/bB
data[cur]=temp[i1++]; \@%sX24D
else if(temp[i1] data[cur]=temp[i1++]; ~-dL #;
else jjbw+
data[cur]=temp[i2++]; u=mJI*
} @-g'BvS
} hp:8e@
|izf|*e
} LEM^8G]O
ptcG:
改进后的归并排序: ;?-`n4B&
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package org.rut.util.algorithm.support; JE[+
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import org.rut.util.algorithm.SortUtil; *CnrzrKtQ
l>H G|ol
/** pN]$|#%q(
* @author treeroot @X\2K?c(v
* @since 2006-2-2 #!h +K"wX
* @version 1.0 Y64B"J=P9
*/ x?|C-v
public class ImprovedMergeSort implements SortUtil.Sort { P0/B!8x
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private static final int THRESHOLD = 10; Xy;!Q`h(
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/* 6Eu&%`
* (non-Javadoc) @Z50S 8
* s</llJ$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -_>g=a@&
*/ Qey6E9eCA
public void sort(int[] data) { DJm/:td
int[] temp=new int[data.length]; 4Pm+0=E
mergeSort(data,temp,0,data.length-1); Aj22t
} WecJ^{g>r{
1.5lJ:[G
private void mergeSort(int[] data, int[] temp, int l, int r) { ' YONRha
int i, j, k; SdI/
int mid = (l + r) / 2; N]p|c3D
if (l == r) wn$:L9"YN
return; 4-YXXi}
if ((mid - l) >= THRESHOLD) c=-2c&=&
mergeSort(data, temp, l, mid); ,;_D~7L
else jE&Onzc
insertSort(data, l, mid - l + 1); -6()$cl}0
if ((r - mid) > THRESHOLD) Vu6pl
mergeSort(data, temp, mid + 1, r); W1@Q)i
else gw1| ?C
insertSort(data, mid + 1, r - mid); fC$~3v
r7I,%}k
for (i = l; i <= mid; i++) { j&S8x|5
temp = data; kZlRS^6
} >v+ia%o
for (j = 1; j <= r - mid; j++) { ;-G!jWt6Zi
temp[r - j + 1] = data[j + mid]; qwb`8o
} -CTsB)=\,
int a = temp[l]; >Kd(.r[Er
int b = temp[r]; (5"BKu1t
for (i = l, j = r, k = l; k <= r; k++) { cZ" Ut
if (a < b) { 's]+.3">L1
data[k] = temp[i++]; B) 81mcy
a = temp; \I\'c.$I.Y
} else { C+WHg-l
data[k] = temp[j--]; ; md{T'
b = temp[j]; 9u'hCi(
} 3,K*r"=
} F7(~v2|
} lRn6Zh
v!;E1
/** t `4^cd5V
* @param data d E@R7yU@
* @param l `;^%t
* @param i @UO=)PxN3
*/ Z{ntF
private void insertSort(int[] data, int start, int len) { X-Sso9/q.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EO|r
} ))n7.pB9/
} o(W|BD!
} mne^PSI:
} ?-FSDNQ
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堆排序： ^}2 ie|
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package org.rut.util.algorithm.support; !U"1ZsO)l
cLQvzd:h=
import org.rut.util.algorithm.SortUtil; /~_Cb=7
YkcX#>,
/** ;3n0 bKDY
* @author treeroot }*n(RnCn
* @since 2006-2-2 lQ%]](a6
* @version 1.0 's{-1aW
*/ h(;qnV'c
public class HeapSort implements SortUtil.Sort{ o8P 5C4y
hfY Ieb#91
/* (non-Javadoc) O_f|R1G5z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eiZv|?^0
*/ auP:r
public void sort(int[] data) { @j$tpz
MaxHeap h=new MaxHeap(); S,5>g07-`
h.init(data); ^uW!=%D
for(int i=0;i h.remove(); qYFol#=%
System.arraycopy(h.queue,1,data,0,data.length); GLb}_-|
} ;G.m;5A
g<s[6yA
private static class MaxHeap{ *@Z/L26s;=
`4cs.ab
void init(int[] data){ 0EM`,?i .Q
this.queue=new int[data.length+1]; <69/ZI),Y{
for(int i=0;i queue[++size]=data; /KEPPp
fixUp(size); Tk-PCra
} ?lb1K'(
} Gvt.m&_
*seKph+'c
private int size=0; I}Z[F,}*J
-A9 !Y{Z
private int[] queue; Y#PbC
,{c9Lv%@J
public int get() { #VC^><)3
return queue[1]; (ju-r*0
} RR:m<9l
[pbX_
public void remove() { T\:3(+uK
SortUtil.swap(queue,1,size--); M[_~7~4
fixDown(1); xIF z@9+k
} RlX;c!K
file://fixdown jh]wHG
private void fixDown(int k) { OgrUP
int j; ;T6^cS{Gj
while ((j = k << 1) <= size) { v,RLN`CID
if (j < size %26amp;%26amp; queue[j] j++; 2 c'=^0:
if (queue[k]>queue[j]) file://不用交换 @yaBtZUp3
break; +[r%y,k
SortUtil.swap(queue,j,k); tGzYO/Zp
k = j; d{0w4_x
} 8N(bLGUG
} bF'~&<c
private void fixUp(int k) { 76)(G/
while (k > 1) { j:|60hDz^
int j = k >> 1; mf@YmKbp
if (queue[j]>queue[k]) -3VxjycY
break; | qHWM
SortUtil.swap(queue,j,k); $BE^'5G&4Y
k = j; ~u8}s4
} _\"P<+!
} N{/q p
X3]E8)645N
} "h7-nwm
jjvm<;lv
} ,-c(D-&
OP2!lEs
SortUtil： da!N0\.1T
ru(Xeojv#
package org.rut.util.algorithm; ]Vl5v5_
Ats"iV
import org.rut.util.algorithm.support.BubbleSort; {<~XwJ.
import org.rut.util.algorithm.support.HeapSort; z.Y7u3K.8
import org.rut.util.algorithm.support.ImprovedMergeSort; HcHfwLin0
import org.rut.util.algorithm.support.ImprovedQuickSort; %8$JL=c
import org.rut.util.algorithm.support.InsertSort; ^i-%FY_i5}
import org.rut.util.algorithm.support.MergeSort; \9se~tAl3
import org.rut.util.algorithm.support.QuickSort; GQ|kcY=
import org.rut.util.algorithm.support.SelectionSort; -5vc0"?E
import org.rut.util.algorithm.support.ShellSort; z}C#+VhQ`
35RH|ci&
/** NfR,m]
* @author treeroot 8+gx?pb
* @since 2006-2-2 'xStA
* @version 1.0 7!oqn'#>A
*/ =oT@h 9VI
public class SortUtil { U]hQ#a+
public final static int INSERT = 1; Ffj:xZ9rk
public final static int BUBBLE = 2; (fh:q2E#
public final static int SELECTION = 3; NFLmM
public final static int SHELL = 4; UUb!2sO
public final static int QUICK = 5; Z mi<Z
public final static int IMPROVED_QUICK = 6; 83i%3[L
public final static int MERGE = 7; W%Rh2l
public final static int IMPROVED_MERGE = 8; ~8pf.^,fi
public final static int HEAP = 9; QJdSNkc6
AV d
public static void sort(int[] data) { @dCu]0oNI
sort(data, IMPROVED_QUICK); ^#3$C?d
} {k?Y:
private static String[] name={ -&,NM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s7xRry
}; ~g|e?$j
;S?1E:\av
private static Sort[] impl=new Sort[]{ xA!o"VZPq7
new InsertSort(), $Q{1^
new BubbleSort(), 0M8JE9 Kx
new SelectionSort(), K:y q^T7
new ShellSort(), j&T/.]dX&
new QuickSort(), Vg \-^$
new ImprovedQuickSort(), a _
new MergeSort(), i+&="Z@
new ImprovedMergeSort(), ~d5"<`<^o
new HeapSort() _\]D<\St
}; z(\H.P#
y\0^c5}
public static String toString(int algorithm){ t_]UseP$RF
return name[algorithm-1]; CdaB.xk
} >D:S)"
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public static void sort(int[] data, int algorithm) { XIjSwR kYJ
impl[algorithm-1].sort(data); GE5@XT
} 4`8.\
_a<PUdP
public static interface Sort { /0o 2
public void sort(int[] data); J1R%w{
} &-b=gnT
-|)[s[T~m
public static void swap(int[] data, int i, int j) { (6h7'r $
int temp = data; ,s)~Y p?<
data = data[j]; Q.yKbO<[
data[j] = temp; 2OT6*+D
} akCl05YW
} M;iaNL(