[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#'v}(v
} 3Sn# M{wH
int i1=l; Q'Y7PG9m~
int i2=mid+1; Ym9~/'%]
for(int cur=l;cur<=r;cur++){ _[y<u})
if(i1==mid+1) wU&vkb)k
data[cur]=temp[i2++]; ;2547b[]
else if(i2>r) 3:3>k8
data[cur]=temp[i1++]; $6/CTQ
else if(temp[i1] data[cur]=temp[i1++]; k1HCPj
else *;~i\M9_
data[cur]=temp[i2++]; 3d(:Y6D)
} KOhIk*AC'
} ?rQIUP{D7
R(GL{Dh}L
} +3r4GEa Z
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改进后的归并排序: BB? 4>#D
jR^_1bu
package org.rut.util.algorithm.support; 1-8G2e
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import org.rut.util.algorithm.SortUtil; yzyK$WN\[3
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/** g<YN#
* @author treeroot Jmun^Q/h
* @since 2006-2-2 8g3?@i
* @version 1.0 1W{t?1[s
*/ R-1C#R[
public class ImprovedMergeSort implements SortUtil.Sort { +y|Q7+
B5!|L)7>{p
private static final int THRESHOLD = 10; 'E4}++\
Eu$hC]w
/* oN=>U"<\1
* (non-Javadoc) bA/'IF+
* Z4D[nPm$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Vu)
*/ rWip[>^
public void sort(int[] data) { e9rgJJ
int[] temp=new int[data.length]; }k_'a^;C1
mergeSort(data,temp,0,data.length-1); ^NFL3v8
} {,e-;2q
9QEK|x`8
private void mergeSort(int[] data, int[] temp, int l, int r) { ;~(yv|f6
int i, j, k; d,0Klew
int mid = (l + r) / 2; HEe_K!_
if (l == r) k6(0:/C
return; 1krSX2L
if ((mid - l) >= THRESHOLD) :} DTK
mergeSort(data, temp, l, mid); T}Ve:S
else iB5'mb*
insertSort(data, l, mid - l + 1); %ZGG6Xgw
if ((r - mid) > THRESHOLD) C\}M_MD
mergeSort(data, temp, mid + 1, r); @ [%K D
else jh/aK_Q,w
insertSort(data, mid + 1, r - mid); .:B;%*
:rEZR`
for (i = l; i <= mid; i++) { #E4|@}30`
temp = data; PgYIQpV
} &|fWtl;43
for (j = 1; j <= r - mid; j++) { 'oF('uR
temp[r - j + 1] = data[j + mid]; *)s^+F 0
} :O]US)VSj
int a = temp[l]; aJ J63aJ
int b = temp[r]; f;obK~b[
for (i = l, j = r, k = l; k <= r; k++) { }[SYWJIc
if (a < b) { O<y65#68Z
data[k] = temp[i++]; SL?YU(a
a = temp; !>)o&sM
} else { PyM59v
data[k] = temp[j--]; TPNKvv!s
b = temp[j]; ev1:0P
} rYrvd[/*&(
} [rReBgV
} \/R $p
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/** Te7xj8<
* @param data =!IoL7x
* @param l _a zJ>
* @param i }N"YlGY\Yn
*/ !JA//{?
private void insertSort(int[] data, int start, int len) { `pfRY!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kQO-V4z!
} ^CP>|JWD^
} 05o<fa2HE
} W;|%)D)y
} 'q1cc5(ueV
+nL#c{
堆排序： z+<ofZ(.
VUZeC,FfO
package org.rut.util.algorithm.support; W>&!~9H
5jHr?C
import org.rut.util.algorithm.SortUtil; [R<>3}50Y
L$v<t/W
/** OuyO_DSI
* @author treeroot r\FduyOXv
* @since 2006-2-2 c"/Hv
* @version 1.0 a7jE*%f9
*/ mEyIbMci
public class HeapSort implements SortUtil.Sort{ Ht|"91ZC5
:}-izd)/j
/* (non-Javadoc) C~T*Wlk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ff 6x4t
*/ 3)hQT-)
public void sort(int[] data) { 3 5/ s\
MaxHeap h=new MaxHeap(); 9hjzOJPuga
h.init(data); Zm6|aHx8v
for(int i=0;i h.remove(); +g_m|LF
System.arraycopy(h.queue,1,data,0,data.length); 7MQxW<0
} b;5 M$
!1Nh`FN
private static class MaxHeap{ r(JP& @
'~zi~Q7M
void init(int[] data){ 2IXtIE
this.queue=new int[data.length+1]; ywA7hm
for(int i=0;i queue[++size]=data; vPAL,
fixUp(size); hP$5>G(3
} 5 hW#BB
} jOm7:+H
e'.CIspN
private int size=0; C]Q}HI#G
P2)/!+`a
private int[] queue; 3ej[
W#\{[o
public int get() { 9V>C %I
return queue[1]; v1=N?8Hz1
} W=Mdh}u_I
FSYs1Li_C
public void remove() { |\W~+}'g~
SortUtil.swap(queue,1,size--); ,JfP$HJ
fixDown(1); H\$uRA oo*
} -FW^fGS+
file://fixdown ~/rKKc
private void fixDown(int k) { nK#%Od{GF
int j; c[Z#q*Q
while ((j = k << 1) <= size) { G|TnvZ KX
if (j < size %26amp;%26amp; queue[j] j++; JH*fxG
if (queue[k]>queue[j]) file://不用交换 o $'K}U
break; 0S$TLbx
SortUtil.swap(queue,j,k); ?RS4oJz,5g
k = j; _}.WRFIJ@L
} wV\G$|Y
} #"fn;
private void fixUp(int k) { Ok<,_yh
while (k > 1) { j{6O:d6([$
int j = k >> 1; -B#K}xL|x
if (queue[j]>queue[k]) 1 ]ePU8
break; m$7C{Mr'
SortUtil.swap(queue,j,k); HhwAzk/G~
k = j; X$_pDF&\z
} S3&n?\CO:
} oA3;P]~[
*:ErZ UyQM
} )nrYxxN
J[c`Qq:&e
} rp|A88Q/!
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SortUtil： q>.C5t'Qx
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package org.rut.util.algorithm; NDJP`FI
t:b}Mo0
import org.rut.util.algorithm.support.BubbleSort; aLlHR_
import org.rut.util.algorithm.support.HeapSort; @WiTh'w0
import org.rut.util.algorithm.support.ImprovedMergeSort; t<"%m)J
import org.rut.util.algorithm.support.ImprovedQuickSort; &"7+k5O
import org.rut.util.algorithm.support.InsertSort; $LiBJ~vV<
import org.rut.util.algorithm.support.MergeSort; .yD5>iBh
import org.rut.util.algorithm.support.QuickSort; {7%(m|(
import org.rut.util.algorithm.support.SelectionSort; G++<r7;x
import org.rut.util.algorithm.support.ShellSort; J0B*V0'zR
@U@O#+d'ZR
/** }zqo<o
* @author treeroot 4BeHj~~
* @since 2006-2-2 k{U[ U1j
* @version 1.0 )Br#R:#
*/ Lcf?VV}
public class SortUtil { U2CC#,b!(
public final static int INSERT = 1; 8fktk?|
public final static int BUBBLE = 2; q/ (h{cq
public final static int SELECTION = 3; x+b.9f4xJ
public final static int SHELL = 4; ~y"OyOi&
public final static int QUICK = 5; VCwC$ts
public final static int IMPROVED_QUICK = 6; Yv0y8Vz@
public final static int MERGE = 7; ?Ezy0>j
public final static int IMPROVED_MERGE = 8; wN^^_
public final static int HEAP = 9; Ao#bREm
{ SDnVV
public static void sort(int[] data) { VP<LY/'f
sort(data, IMPROVED_QUICK); 8dCRSU
} NE4]i
private static String[] name={ #^(Yw|/K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G ]uz$V6!
}; ta^$&$l
r! [Qpb-:
private static Sort[] impl=new Sort[]{ xzOn[.Fi
new InsertSort(), 9$D}j"
new BubbleSort(), fIJX5)D
new SelectionSort(), + R~!G
new ShellSort(), y=Z[_L!xr
new QuickSort(), &WOm[]Q4
new ImprovedQuickSort(), +\?+cXSc
new MergeSort(), RxNLn/?d@
new ImprovedMergeSort(), YL78cWOs
new HeapSort() &3 Ki
}; ?cn`N|
o-JB,^TE
public static String toString(int algorithm){ h B_p
return name[algorithm-1]; _>;{+XRX[
} XVb9)a
L-9;"]d~|
public static void sort(int[] data, int algorithm) { i0*Cs#(=h
impl[algorithm-1].sort(data); T Qx<lw
} 57O|e/2
IZ87Px>zL
public static interface Sort { wQ[!~>A
public void sort(int[] data); y]+[o1]-c
} fRq+pUxU
0A-yQzL|
public static void swap(int[] data, int i, int j) { #lMC#Ld
int temp = data; ,_s.amL3O{
data = data[j]; fjY:u,5V_
data[j] = temp; ei"c|/pO
} [j0jAl
} J8ScKMUN2