[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; #pA[k-
} |^Kjz{
int i1=l; "% Y u wMY
int i2=mid+1; AC4 l<:Yh
for(int cur=l;cur<=r;cur++){ !y*oF{RZ
if(i1==mid+1) 39D }
data[cur]=temp[i2++]; s|2}2<+
else if(i2>r) Dbz]{_Y;
data[cur]=temp[i1++]; sfI N)jh
else if(temp[i1] data[cur]=temp[i1++]; %?=)!;[
else m UgRm]
data[cur]=temp[i2++]; _tWE8r,
} I7G,`h+H
} VMHC/jlX@r
=x H~ww (D
} C*rd;+1A
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改进后的归并排序: .'lN4x
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package org.rut.util.algorithm.support; k?j Fh6%
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import org.rut.util.algorithm.SortUtil; LdEE+"Jw
Z*eoA
/** TQ'e
* @author treeroot n(R_#,Hs
* @since 2006-2-2 bU+9Gi@v
* @version 1.0 `%y5\!X
*/ plXG[1;&G
public class ImprovedMergeSort implements SortUtil.Sort { * nCx[
=l,#iYJP8
private static final int THRESHOLD = 10; tcOnM w
Eem g
/* NvHN -^2
* (non-Javadoc) `~nCbUUee
* IG|\:Xz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x'i0KF
*/ v[L[A3`"/
public void sort(int[] data) { &+- e
int[] temp=new int[data.length]; ^)Smv\Md
mergeSort(data,temp,0,data.length-1); h,]tQ#!s8
} ccRlql(
EG%I1F%
private void mergeSort(int[] data, int[] temp, int l, int r) { ,tau9>!
int i, j, k; ZTr:xX{R6
int mid = (l + r) / 2; K!9y+%01
if (l == r) E2h(w_l
return; JIVo=5c}
if ((mid - l) >= THRESHOLD) nT_*EC<.
mergeSort(data, temp, l, mid); z'?SRK5+
else Ad^dF'SN
insertSort(data, l, mid - l + 1); d:A\<F
if ((r - mid) > THRESHOLD) 4tbw*H5!5
mergeSort(data, temp, mid + 1, r); iKohuZr
else G!nl'5|y
insertSort(data, mid + 1, r - mid); f+{c1fb>s
KrJ5"1=
for (i = l; i <= mid; i++) { 4s[`yV
temp = data; "w>rlsT<O
} EV:_Kx8fP
for (j = 1; j <= r - mid; j++) { MKV=m8G=
temp[r - j + 1] = data[j + mid]; (irk$d %
} pTc$+Z73
int a = temp[l]; >/(i3)
int b = temp[r]; 8w03{H 0
for (i = l, j = r, k = l; k <= r; k++) { Cw6>^
if (a < b) { d,zp`S
data[k] = temp[i++]; V+Y|4Y&
a = temp; KX0<j
} else { d^ 2u}^kG
data[k] = temp[j--]; eL<m.06cfY
b = temp[j]; W/#KX}4
} d1UVvyH
} x*NqA(r
} CW.&Y?>Tv
>.a+:
/** v]B0!k&4.
* @param data h=uiC&B
* @param l K#_~ !C4L
* @param i CkmlqqUHC
*/ %fn'iKCB
private void insertSort(int[] data, int start, int len) { tMD^$E"C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n}AR/3}
} K^z5x#Yj
} !L0E03')k
} |:7EJkKZ
} 'mBLf&fB
)o " SB1
堆排序： )H[h53bIq
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package org.rut.util.algorithm.support; uZqu xu.
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import org.rut.util.algorithm.SortUtil; VV0EgfJ
1}n)J6m
/** Mv7w5vTl
* @author treeroot >0g`U
* @since 2006-2-2 MYDf`0{$_a
* @version 1.0 y]QQvCJr3d
*/ . T6_N
public class HeapSort implements SortUtil.Sort{ WQIM2_=M
Q^1#xBd
/* (non-Javadoc) &P,4EaC9;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7)8rc(58
*/ T9<H%iF
public void sort(int[] data) { cdek^/
MaxHeap h=new MaxHeap(); 5H'b4Cyi`
h.init(data); 32iWYN
for(int i=0;i h.remove(); O9qKwn;q(
System.arraycopy(h.queue,1,data,0,data.length); k"DQbUy0L
} %b-;Rn
.^9/ 0.g8t
private static class MaxHeap{ QRg"/62WCD
[kp7LA"`
void init(int[] data){ -Iruua7b
this.queue=new int[data.length+1]; 1v[#::Bs
for(int i=0;i queue[++size]=data; R uFu,H-
fixUp(size); <@x+N%C
} U"%8"G0)
} X('Q;^`
eHnei F
private int size=0; 1^WA
e$/Zb`k
private int[] queue; rvoS52XG,
VvMU)
public int get() { )qe$rD;N
return queue[1]; V"2AN3~&
} ,39$iHk
gE6y&a
public void remove() { y?R <g^A
SortUtil.swap(queue,1,size--); zOu$H[
fixDown(1); k.? T.9
} 6q xUT
file://fixdown `X.=uG+m
private void fixDown(int k) { T h- vG
int j; 9V4V}[%
while ((j = k << 1) <= size) { 'bY|$\I
if (j < size %26amp;%26amp; queue[j] j++; )Ido|!]0d
if (queue[k]>queue[j]) file://不用交换 w3?t})PB&
break; lA^Kh
SortUtil.swap(queue,j,k); 82@;.%
k = j; 1^H<+0
} 4iPua"8
} @SQ*/sw (c
private void fixUp(int k) { Vp-OGX[
while (k > 1) { >G3J3P(
int j = k >> 1; _^2[(<Gmv
if (queue[j]>queue[k]) W!Ct[t
break; zC>(!fJqq
SortUtil.swap(queue,j,k); 2S10j%EeI
k = j; ``YL] <<
} $d??(
} PJ11LE
5_tK3Q8?
} K/.hJ
j BQqpFH9
} sxQ,x/O
:c/=fWM%
SortUtil： Xi`U`7?D(=
3<'Q`H>
package org.rut.util.algorithm; kA:;c}p
mBgx17K/-_
import org.rut.util.algorithm.support.BubbleSort; \g[f4xAV
import org.rut.util.algorithm.support.HeapSort; O>):^$-K%
import org.rut.util.algorithm.support.ImprovedMergeSort; LAVt/TcZS|
import org.rut.util.algorithm.support.ImprovedQuickSort; m&z%kVsg]
import org.rut.util.algorithm.support.InsertSort; )I UWM
import org.rut.util.algorithm.support.MergeSort; .j<B5/+
import org.rut.util.algorithm.support.QuickSort; I;m@cSJ|j
import org.rut.util.algorithm.support.SelectionSort; fD}]Mi:V
import org.rut.util.algorithm.support.ShellSort; vFvu8*0
Hr,gV2n
/** Qc<O; #
* @author treeroot _j<M}
* @since 2006-2-2 >5},qs:lZ
* @version 1.0 VKfHN_m*
*/ ~4X!8b_
public class SortUtil { LYT<o FE-
public final static int INSERT = 1; 2+Y`pz47W
public final static int BUBBLE = 2; 7ofH@U
public final static int SELECTION = 3; m3!MHe~t
public final static int SHELL = 4; \hD bv5
public final static int QUICK = 5; {rJF)\2
public final static int IMPROVED_QUICK = 6; MJR\ g3
public final static int MERGE = 7; pQ`L=#WM
public final static int IMPROVED_MERGE = 8; 0YRYCO$
public final static int HEAP = 9; tfIBsw.
Y~?YA/.x
public static void sort(int[] data) { q'-l;V|
sort(data, IMPROVED_QUICK); x=|@AFI
} GT}#iM
private static String[] name={ -ns a3P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =y/Lbe}:
}; 5{f/H] P
2Sd6b 2-
private static Sort[] impl=new Sort[]{ KFG^vmrn
new InsertSort(), U1tPw`0h
new BubbleSort(), EGO@`<"h
new SelectionSort(), uXa}<=O
new ShellSort(), S5vMP N
new QuickSort(), .ihn@eg
new ImprovedQuickSort(), <.XoC?j
new MergeSort(), }j@@
new ImprovedMergeSort(), (MU7
new HeapSort() j'b4Sbs-f
}; Ybiz]1d
bv"({:x
public static String toString(int algorithm){ .f<,H+m^
return name[algorithm-1]; aV#;o9H{
} 5 :>
~OfKn1D
public static void sort(int[] data, int algorithm) { !H.lVA
impl[algorithm-1].sort(data); GgZf6~b1J
} 3ZZI1_j
3+PM_c)Y
public static interface Sort { z1A-EeT
public void sort(int[] data); .b)(_*
} )Em,3I/.l
AMfu|%ZL
public static void swap(int[] data, int i, int j) { #Jb$AA!z
int temp = data; k(^b
data = data[j]; t$%}*@x7
data[j] = temp; e.h:9`"*
} S(xA}0]
} K",]_+b