[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; .FnO
} L/w9dk*uv
int i1=l; qK4E:dD
int i2=mid+1; %8T:rS
for(int cur=l;cur<=r;cur++){ #(53YoV_8
if(i1==mid+1) qG/a5i
data[cur]=temp[i2++]; 7FVu[Qu
else if(i2>r) ^#R-_I
data[cur]=temp[i1++]; "b!QE2bRO
else if(temp[i1] data[cur]=temp[i1++]; 3d.JV'C'c
else C'hI{4@P
data[cur]=temp[i2++]; q)ygSOtj
} L30x2\C
} KsGSs9
.d5|Fs~B
} FV/X&u8~
N2VF_[l
改进后的归并排序: d{f3R8~Q.
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package org.rut.util.algorithm.support; KZL5>E
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import org.rut.util.algorithm.SortUtil; >,`/ z
Tv0|e'^
/** k})Ag7c
* @author treeroot QK\QvU2y
* @since 2006-2-2 ZbYwuyHk(3
* @version 1.0 @\_tS H
*/ }`$:3mb&f
public class ImprovedMergeSort implements SortUtil.Sort { <v"C`cga
Wx&AY"J
private static final int THRESHOLD = 10; .BXZ\r`
ctOC.
/* S zOB{
* (non-Javadoc) :rb<mg[
* A>$VkGo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :YB:)wV,P
*/ ML0o:8Bd\
public void sort(int[] data) { Etj*3/n|
int[] temp=new int[data.length]; IC9:&C[
mergeSort(data,temp,0,data.length-1); B7TA:K
} MjG=6.J|`
' %OQd?MhL
private void mergeSort(int[] data, int[] temp, int l, int r) { LS?hb)7
int i, j, k; 2|o6~m<pE
int mid = (l + r) / 2; Um\Nd#=:
if (l == r) bG>pm|/
return; kF~}htv.=
if ((mid - l) >= THRESHOLD) $.(>Sj1
mergeSort(data, temp, l, mid); f3-=?Z
else 9c806>]U^
insertSort(data, l, mid - l + 1); '=x
if ((r - mid) > THRESHOLD) S,vrz!'>A
mergeSort(data, temp, mid + 1, r); TD,W*(b
else :XF;v
insertSort(data, mid + 1, r - mid); Wn24eld"x
!wvP24"y
for (i = l; i <= mid; i++) { 'r4 j;Jn
temp = data; q:-8W[_
} $qy%Q]
for (j = 1; j <= r - mid; j++) { 'R~x.NM
temp[r - j + 1] = data[j + mid]; '@HWp8+
} s_K:h
int a = temp[l]; [e ;K$
int b = temp[r]; SMgf(N3]
for (i = l, j = r, k = l; k <= r; k++) { XN]kNJX
if (a < b) { :SSe0ZZ_6b
data[k] = temp[i++]; J']1^"_'
a = temp; &oYX093di
} else { @6ZQkX/
data[k] = temp[j--]; Gy 'l;2
b = temp[j]; 1c,$D5#
} ,g{`M]Ov
} +"T?.,
} Yv9(8
1d|+7
/** 1I KDp]SN
* @param data A;w,m{9<
* @param l >t?;*K\x"
* @param i +|Xx=1_?BK
*/ kwZ8q-0
private void insertSort(int[] data, int start, int len) { 2M= gpy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j*g5f
} WU{G_Fqaz
} sBq @W4
} {k}S!T
} <"AP&J'H
J^ryUOo}b
堆排序： ,S:LhgSP
Fc7mAV=
package org.rut.util.algorithm.support; @xB"9s
kfg9l?R$I<
import org.rut.util.algorithm.SortUtil; D>~z{H%\
.'p_j(uv
/** +l2{EiQw
* @author treeroot 1>4'YMdZi
* @since 2006-2-2 S!2M?}LU
* @version 1.0 G*mk 19Z
*/ {Aj}s3v
public class HeapSort implements SortUtil.Sort{ !tmY_[\
Dx/?0F7V
/* (non-Javadoc) xg/3*rL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?W9$=
*/ AlIFTNg:"
public void sort(int[] data) { ]k]P (w
MaxHeap h=new MaxHeap(); lycY1lK
h.init(data); 6jiVz%`=Z
for(int i=0;i h.remove(); zm9>"(H
System.arraycopy(h.queue,1,data,0,data.length); |9jeOV}/
} :|M0n%-X
YT}m 8Y
private static class MaxHeap{ 'F?T4
t@>Uc`%
void init(int[] data){ |OUr=b
this.queue=new int[data.length+1]; &$qqF&
for(int i=0;i queue[++size]=data; QK%{\qu
fixUp(size); pqBd#
} d11~mU\
} 5K;jW
~0!s5
private int size=0; bB->\
nxKV7d@R
private int[] queue; O2q`2L~
]P<u^ `{*
public int get() { ^hq`dr|R=
return queue[1]; %/CCh;N#
} 't{~#0d=
1xar L))
public void remove() { >jME == U0
SortUtil.swap(queue,1,size--); ux& WN ,
fixDown(1); vp1IYW
} s6lo11
file://fixdown A|I7R-
private void fixDown(int k) { T' %TMA
int j; |#LU"D
while ((j = k << 1) <= size) { GP<A v1
if (j < size %26amp;%26amp; queue[j] j++; 9sFZs]uM
if (queue[k]>queue[j]) file://不用交换 "Up3W%]SB
break; /z>G=kA
SortUtil.swap(queue,j,k); ZC@ 33Q(
k = j; (2[tQ`~
} [DC8X P5<
} r;g[<6`!S
private void fixUp(int k) { /9,!)/j
while (k > 1) { .EM0R\q
int j = k >> 1; 7$b!-I+a2
if (queue[j]>queue[k]) BRPvBs?Q,{
break; s%2w&Us*
SortUtil.swap(queue,j,k); IKMkpX!]
k = j; R7r` (c!
} HJo&snT3
} :$~)i?ge<5
Jajo!X*Wai
} "9jt2@<
ARGtWW~:
} C}<j8a?
3vfm$sx@
SortUtil： uPr'by
2w>WS#
package org.rut.util.algorithm; PTWP7A[
[fiB!G]?
import org.rut.util.algorithm.support.BubbleSort; !1$QNxgi
import org.rut.util.algorithm.support.HeapSort; /bv1R5
import org.rut.util.algorithm.support.ImprovedMergeSort; Q0K2md_%x
import org.rut.util.algorithm.support.ImprovedQuickSort; N_rz~$|@9
import org.rut.util.algorithm.support.InsertSort; ?n)d: )Ud"
import org.rut.util.algorithm.support.MergeSort; ~1]4 J(+
import org.rut.util.algorithm.support.QuickSort; ijEMS1$=7
import org.rut.util.algorithm.support.SelectionSort; _CO?HX5ek
import org.rut.util.algorithm.support.ShellSort; hCVe05
N DZ :`D
/** 1@rI4U@D
* @author treeroot v;AsV`g
* @since 2006-2-2 }:<`L\8q\
* @version 1.0 4$#nciAe
*/ tgSl(.
public class SortUtil { Anr''J&9`H
public final static int INSERT = 1; 1O]'iS"
public final static int BUBBLE = 2; epuN~T
public final static int SELECTION = 3; j*+[=X/
public final static int SHELL = 4; {AUhF}O
public final static int QUICK = 5; mSF>~D1_
public final static int IMPROVED_QUICK = 6; VW:WB.K$
public final static int MERGE = 7; Q>Voa&tYn
public final static int IMPROVED_MERGE = 8; .<%2ON_
public final static int HEAP = 9; cH%qoHgx
vikA
public static void sort(int[] data) { XVr>\T4
sort(data, IMPROVED_QUICK); y (@j;Q3(r
} }N[|2nR'
private static String[] name={ r@b M3V_o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mo+zq~,M
}; v|fA)Ww
;,2i1m0"
private static Sort[] impl=new Sort[]{ v;m`d{(i2
new InsertSort(), o81RD#>E)
new BubbleSort(), fy]z<SPhVJ
new SelectionSort(), Bn:"qN~
new ShellSort(), J<hqF4z
new QuickSort(), :/UO3 c(
new ImprovedQuickSort(), OH.^m6Z
new MergeSort(), 9Rl-Jz8g
new ImprovedMergeSort(), B=14 hY@`
new HeapSort() T'_#Dwmj*
}; =h5&:?X
KYa}k0tVAp
public static String toString(int algorithm){ Q+@/.qJ
return name[algorithm-1]; [A~n=m5H
} k{\wjaf)
DwSB(O#X
public static void sort(int[] data, int algorithm) { DEJ0<pnQr
impl[algorithm-1].sort(data); p[oR4 HWr
} <L'!EcHm%]
4SRjF$Bsz
public static interface Sort { 5&A{IN
public void sort(int[] data); _G3L+St
} dpAj9CX(
Qp>'V<%m-
public static void swap(int[] data, int i, int j) { 1i=lJmr
int temp = data; 4`E[WE:Q
data = data[j]; t&|M@Ouet
data[j] = temp; ~-2%^ovB
} j IO2uTM~
} zplAH!s5''