[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; Xa o*h(Q@L
} Z*uv~0a>9Q
int i1=l; 0Va+l)F
int i2=mid+1; AzFd#P
for(int cur=l;cur<=r;cur++){ ].ZfTrM]
if(i1==mid+1) 7\(mn$
data[cur]=temp[i2++]; Hwb+@'o
else if(i2>r) U-^qVlw
data[cur]=temp[i1++]; FTu6%~M/
else if(temp[i1] data[cur]=temp[i1++]; rgq~lZ.U4K
else .M(')$\U
data[cur]=temp[i2++]; Oly"ll*K
} v9*ugu[K9
} A]<+Aq@{
v@,n]"
} RBOb/.$
D;?cf+6$
改进后的归并排序: Kd='l~rby
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package org.rut.util.algorithm.support; Fw{:fFZC[
F#b^l}
import org.rut.util.algorithm.SortUtil; "rl(%~Op
3#\++h]QZ
/** 1`sLbPW
* @author treeroot @n|Mr/PAj
* @since 2006-2-2 ZYS`M?Au
* @version 1.0 I8x,8}o>V
*/ 7];AB;0"
public class ImprovedMergeSort implements SortUtil.Sort { WHF[l1
KIRCye
private static final int THRESHOLD = 10; cMU"SO
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/* V><,.p8
* (non-Javadoc) EjA3hHJ
* Wg5<@=x!G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jT'09r3P
*/ q"@>rU4
public void sort(int[] data) { Tv[|^G9x
int[] temp=new int[data.length]; qkbGM-H%U
mergeSort(data,temp,0,data.length-1); 8NZQTRdH
} #"qP4S2
s'4O]k`
private void mergeSort(int[] data, int[] temp, int l, int r) { OH >#f6`[
int i, j, k; fzdWM:g
int mid = (l + r) / 2; P.y06^ X}A
if (l == r) H*H~~yQ
return; \:BixBU7
if ((mid - l) >= THRESHOLD) ]qd$rX
mergeSort(data, temp, l, mid); @fQvAok
else XN^l*Q?3n
insertSort(data, l, mid - l + 1); c4f3Dr'xw
if ((r - mid) > THRESHOLD) ^7Rc\
mergeSort(data, temp, mid + 1, r); JT p+&NS
else 41v#|%\w
insertSort(data, mid + 1, r - mid); a.z)m}+
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for (i = l; i <= mid; i++) { \1He9~6
temp = data; :Ahw{z`H#
} ;?G..,
for (j = 1; j <= r - mid; j++) { 6}cN7wnm j
temp[r - j + 1] = data[j + mid]; ew.jsa`TrW
} ],~H3u=s3
int a = temp[l]; 8w$q4fg0
int b = temp[r]; Fhrj$
for (i = l, j = r, k = l; k <= r; k++) { q4T98s2J
if (a < b) { M<nH
data[k] = temp[i++]; t-i\gq^
a = temp; bOolBKV
} else { Ya&\b 6
data[k] = temp[j--]; ]7{ e~U
b = temp[j]; eakQZ-Q
} y 2C Jk~
} D0}r4eA
} vD^Uod1
MwC}
/** $jOp:R&I^3
* @param data iN9G`qF3!Q
* @param l Z,oCkv("n
* @param i hkB|rhJgm
*/ {G+iobQdd
private void insertSort(int[] data, int start, int len) { *zwo="WA\t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jN AS'JV
} 8shx7"
} 9o4h~Imu
} %OsxXO?
} 6Jq3l_
3~{0X-
堆排序： qi ">AQpp
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package org.rut.util.algorithm.support; M!D6i5k,
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import org.rut.util.algorithm.SortUtil; { '402
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/** 7%W1M@
* @author treeroot w IP4Z^
* @since 2006-2-2 ddN G:
* @version 1.0 [k0/ZfFwV
*/ ?bpVdm!
public class HeapSort implements SortUtil.Sort{ Uu52uR
K9]zUe&#w
/* (non-Javadoc) jSSEfy>^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'c_K[p$
*/ 1{wbC)
public void sort(int[] data) { @qYT/V*/
MaxHeap h=new MaxHeap(); M%Ksyr9
h.init(data); C#4_`4{
for(int i=0;i h.remove(); g~$UU(HX
System.arraycopy(h.queue,1,data,0,data.length); 0qIg:+l+
} dWY{x47
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private static class MaxHeap{ J .VZD
awI{%u_(nA
void init(int[] data){ N!MDD?0
this.queue=new int[data.length+1]; ktS^^!,l%
for(int i=0;i queue[++size]=data; ^}{x).
fixUp(size); oam;hmw
} >x3lA0m
} *G7cF
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private int size=0; N|Ag8/2A
qE|syA9
private int[] queue; ^8A[ ^cgq
aL`wz !
public int get() { h5pfmN\-5
return queue[1]; ,Si{]y
} f0j]!g
{~uTi>U
public void remove() { fm`V2'Rm
SortUtil.swap(queue,1,size--); kY!zBk
fixDown(1); 4obW>
} =<#G~8WYz
file://fixdown RGs7Hc
private void fixDown(int k) { f$6N
int j; D7T|K :F)
while ((j = k << 1) <= size) { AS@(]T#R
if (j < size %26amp;%26amp; queue[j] j++; c{_JPy
if (queue[k]>queue[j]) file://不用交换 gua7<z6=eh
break; Lt=32SvTn
SortUtil.swap(queue,j,k); i>]PW|]
k = j; # =tw ,S
} zL9~gJ
} eBs.RR ]O
private void fixUp(int k) { ]wdE :k,D
while (k > 1) { CoNaGb
int j = k >> 1; '?mF,Co{
if (queue[j]>queue[k]) ]K*R[
break; 'j<u0'K@
SortUtil.swap(queue,j,k); ~59lkr8
k = j; Um6}h@>
} y.J>}[\&x
} "C\yM{JZ
,LN^Zx*
} -l57!s~V
\20}/&
} lTP#6zqfv
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SortUtil： `G/g/>y
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package org.rut.util.algorithm; Z|$DchC
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import org.rut.util.algorithm.support.BubbleSort; T|wz%P<J
import org.rut.util.algorithm.support.HeapSort; ThgJ '
import org.rut.util.algorithm.support.ImprovedMergeSort; rMi\#[oB
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Kz$y JTp
import org.rut.util.algorithm.support.InsertSort; DE?k|Get2
import org.rut.util.algorithm.support.MergeSort; GT6i9*tb#
import org.rut.util.algorithm.support.QuickSort; (C#0 ML
import org.rut.util.algorithm.support.SelectionSort; 05T?c{ ;
import org.rut.util.algorithm.support.ShellSort; JJ ?'<)EF
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/** k[ zyR
* @author treeroot n}IGxum8`
* @since 2006-2-2 qb=2J5su
* @version 1.0 }7 +%k/
*/ b7dsi|Yo
public class SortUtil { 8]^|&"i.\d
public final static int INSERT = 1; T?m@`"L,
public final static int BUBBLE = 2; ,^8':X"A{!
public final static int SELECTION = 3; T=tW'tlT\v
public final static int SHELL = 4; hE5?G;
public final static int QUICK = 5; 5(J?C-Pk
public final static int IMPROVED_QUICK = 6; 452kE@=49
public final static int MERGE = 7; r^}0qO,XM
public final static int IMPROVED_MERGE = 8; %p )"_q!ge
public final static int HEAP = 9; bRy(`
pXO09L/nv
public static void sort(int[] data) { U|tacO5w`
sort(data, IMPROVED_QUICK); [;Lgbgt3f
} |~ fI=1;;x
private static String[] name={ ZH;4e<gg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ygIn6.p
}; mu{C>w_Rz
mz6]=]1w
private static Sort[] impl=new Sort[]{ 7WS$fUBi
new InsertSort(), 5tpC$4m
new BubbleSort(), iSezrN
new SelectionSort(), E-.X%xfO
new ShellSort(), :G@z?ZJ[
new QuickSort(), =EFh*sp
new ImprovedQuickSort(), (FApkvy
new MergeSort(), c.Hw K\IU
new ImprovedMergeSort(), 0H>gMXWE]
new HeapSort() lr~ |=}^
}; l1k&@1"
wB0vpt5f
public static String toString(int algorithm){ T^|k`
return name[algorithm-1]; eZ(ThA*2=t
} ub~ t}
o}:x-Y
public static void sort(int[] data, int algorithm) { PB$beQ
impl[algorithm-1].sort(data); G)I` M4}*n
} Z3{1`"\<K
9h\RXVk{tA
public static interface Sort { "ymR8y'
public void sort(int[] data); 4;Ucas6
} Eej Lso#\
tW|0_m>{
public static void swap(int[] data, int i, int j) { B;(U?gC
int temp = data; M{G}-QK_.
data = data[j]; CdRJ@Lf
data[j] = temp; mbkt7. ,P
} ~M^[
} {f-O~P<Z4