[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; X*hY?'Rp
} YAQ]2<H
int i1=l; #kjN!S*=
int i2=mid+1; A-x; ai]
for(int cur=l;cur<=r;cur++){ $OB2ZS"
if(i1==mid+1) / E}L%OvE
data[cur]=temp[i2++]; jU.z{(s
else if(i2>r) d*$$E
data[cur]=temp[i1++]; uMKO^D
else if(temp[i1] data[cur]=temp[i1++]; :6~Nq/hZB
else ]=!wMn**
data[cur]=temp[i2++]; ?~c=Sa-
} k#X~+}N^
} f]Z%,'1^
gpDH_!K
} y:u7*%"
b5lZ||W.
改进后的归并排序: k=!lPIx
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package org.rut.util.algorithm.support; r0t4\d_&
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import org.rut.util.algorithm.SortUtil; OV/H&fe
w#mnab@
/** Q46^i7=
* @author treeroot 'ol8lIa.P
* @since 2006-2-2 Ro3C(aRx
* @version 1.0 l\g>@b
*/ G(gJtl
public class ImprovedMergeSort implements SortUtil.Sort { UgI0 *PE2
~SUrbRaY>
private static final int THRESHOLD = 10; " O0p.o
EZnXS"z
/* 3}R}|Ha J#
* (non-Javadoc) 36"-cGNr{
* v6=pV4k9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M|8vP53=q
*/ 1oU/gm$7\q
public void sort(int[] data) { 0%J0.USkM7
int[] temp=new int[data.length]; 8p D$/
mergeSort(data,temp,0,data.length-1); `t[b0; 'OH
} m#6RJbEz
-#@l`kt
private void mergeSort(int[] data, int[] temp, int l, int r) { Z 0&=Lw
int i, j, k; hK^(Y
int mid = (l + r) / 2; @'n075)h
if (l == r) h|~I'M]*
return; JC6?*R
if ((mid - l) >= THRESHOLD) d8D028d
mergeSort(data, temp, l, mid); "[h9hoN
else J]G] <)
insertSort(data, l, mid - l + 1); I<E~=
if ((r - mid) > THRESHOLD) ;IyA"C(i
mergeSort(data, temp, mid + 1, r); 0PEg `Wq
else |pLx,#n
insertSort(data, mid + 1, r - mid); (~S=DFsP
lRA=IRQ]
for (i = l; i <= mid; i++) { s1 mKz0q
temp = data; ((0nJJjz
} +/O3L=QyJ
for (j = 1; j <= r - mid; j++) { (U@Ks )
temp[r - j + 1] = data[j + mid]; _EPfeh;
} ;::]R'F[
int a = temp[l]; RvQa&r5l
int b = temp[r]; @vyq?H$U;N
for (i = l, j = r, k = l; k <= r; k++) { YoDL/
if (a < b) { g{ ()
data[k] = temp[i++]; b5i ehoA
a = temp; aF8'^xF
} else { xhcFZTj/(
data[k] = temp[j--]; _43'W{%
b = temp[j]; ^mwS6WH6
} pW&K=,7|
} qAI%6d
} $'*q]]
B^;"<2b*
/** +/+>:
* @param data P;8nC:zL
* @param l 8MQb5( !
* @param i I9 (6
*/ '[WVP=M<XV
private void insertSort(int[] data, int start, int len) { ohU}ST:9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '`s+e#rs4{
} jK^Q5iD
} X!xmto
} gN@|lHbU
} k~%j"%OB
wK]p`:3
堆排序： B,S~Idr}
bZ0{wpeK=
package org.rut.util.algorithm.support; C))x#P36
;_X2E~i[
import org.rut.util.algorithm.SortUtil; sHqa(ynK
G!T_X*^q2U
/** =\`iC6xP}
* @author treeroot /@ww"dmqU
* @since 2006-2-2 y5{Vx{V"Q
* @version 1.0 LWdA3%
*/ -DuI 6K
public class HeapSort implements SortUtil.Sort{ 'fjouO
fI v?HD:j
/* (non-Javadoc) !!k^M"e2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p>N8g#G
*/ %* k`z#b
public void sort(int[] data) { H\fsyxM7
MaxHeap h=new MaxHeap(); +'|nsIx,
h.init(data); Sx8RH),k
for(int i=0;i h.remove(); i 558&:
System.arraycopy(h.queue,1,data,0,data.length); =u-q#<h4;
} %?hvN
y{KYR)
private static class MaxHeap{ q6PG=9d0B
.H@b zm
void init(int[] data){ Cs4ks`Z18
this.queue=new int[data.length+1]; ~^TH5n
for(int i=0;i queue[++size]=data; R53^3"q~
fixUp(size); ({3Ap{Q}
} 1/f{1k
} lqTc6@:D
N:q\i57x
private int size=0; NkV81?
A?bqDy
private int[] queue; 9.%t9RM^
iE?yvtr8
public int get() { b>2{F6F
return queue[1]; UgLFU#
} A.vf)hO
PI.Zd1r
public void remove() { QWc,JCu
SortUtil.swap(queue,1,size--); xa'^:H $X
fixDown(1); $cWt^B'
} ck< `kJ`b
file://fixdown ~t<G gNI
private void fixDown(int k) { !bCSt?}@u
int j; j{j5TvsrY
while ((j = k << 1) <= size) { G?v!Uv8O
if (j < size %26amp;%26amp; queue[j] j++; .07"I7
if (queue[k]>queue[j]) file://不用交换 Aydpr_lp
break; ;f~fGsH}e'
SortUtil.swap(queue,j,k); 7YxVtN
k = j; 8_VGB0~3i
} '&+]85_&$
} x2sKj"2?@
private void fixUp(int k) { 5T%2al,F`
while (k > 1) { aGd wuD
int j = k >> 1; j1;<3)%0
if (queue[j]>queue[k]) DRpFEWsm
break; >F>VlRg
SortUtil.swap(queue,j,k); km*Y#`{
k = j; h'HI92; [
} DcNp-X40I
} kY?tUpM!TB
.{t*v6(TP
} %AN,cE*
L+S)hgUH
} #*q]^Is"
xG;;ykh.]
SortUtil： P!"{-m'
Q*Y-@lZ
package org.rut.util.algorithm; &09&;KJ
?nPG#Z|%
import org.rut.util.algorithm.support.BubbleSort; h w^ V
import org.rut.util.algorithm.support.HeapSort; U9\\8
import org.rut.util.algorithm.support.ImprovedMergeSort; ohbU~R3{U
import org.rut.util.algorithm.support.ImprovedQuickSort; EDz;6Z*4N
import org.rut.util.algorithm.support.InsertSort; -u(,*9]cJ*
import org.rut.util.algorithm.support.MergeSort; Lk!m1J5
import org.rut.util.algorithm.support.QuickSort; \FUMfo^
import org.rut.util.algorithm.support.SelectionSort; 0hhxTOp
import org.rut.util.algorithm.support.ShellSort; )Q62I\
{sf ,(.W
/** +HPcvu?1
* @author treeroot R`Fgne$4
* @since 2006-2-2 Ph%{h"
* @version 1.0 SXP(C^?C
*/ sE'c$H
public class SortUtil { a{L&RRJ
public final static int INSERT = 1; &XV9_{Hm
public final static int BUBBLE = 2; =IW!ZN_
public final static int SELECTION = 3; ^r-d.1
public final static int SHELL = 4; Qu1&$oO
public final static int QUICK = 5; v)T# iw[
public final static int IMPROVED_QUICK = 6; B~E">}=!
public final static int MERGE = 7; @dk-+YxG
public final static int IMPROVED_MERGE = 8; h (q,T$7W
public final static int HEAP = 9; %Z4*;VwQ
7~FHn'xt
public static void sort(int[] data) { 4#}aLP
sort(data, IMPROVED_QUICK); er5!ne
} UOFb.FRP>
private static String[] name={ mI5J]hk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;:_AOb31N
}; J;NIa[a
KJV8y"^=Q
private static Sort[] impl=new Sort[]{ 2F>Y{3&
new InsertSort(), [|ZFei)r
new BubbleSort(), yuy\T(7BN
new SelectionSort(), !(7m/R
new ShellSort(), kc0MQ TJU
new QuickSort(), Pn^`_
new ImprovedQuickSort(), nShXY6bA
new MergeSort(), pbEWnx_
new ImprovedMergeSort(), g<(!>:h
new HeapSort() 0VcHz$ 6
}; l;KrFJ6
}A+ncabm
public static String toString(int algorithm){ "T_9_6tH
return name[algorithm-1]; a7c`[
} /='0W3+o*L
U+*l!"O,
public static void sort(int[] data, int algorithm) { _]33Ht9
impl[algorithm-1].sort(data); ~Ni
} z]r'8Jc
v@|<.
public static interface Sort { ~h_ _Y>
public void sort(int[] data); u.|%@
} J}&U[ds p
,{!,%]bC
public static void swap(int[] data, int i, int j) { :>.{w$Ln%
int temp = data; nKzm.D gt_
data = data[j]; %-yzU/`JF
data[j] = temp; 1$eoW/8.
} F$DA/{.D
} 4VZI]3K,