[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; ^&t(O1.-
} I>b-w;cC
int i1=l; +NRn>1]
int i2=mid+1; hA`>SkO
for(int cur=l;cur<=r;cur++){ 6p/gvpZ
if(i1==mid+1) 7lpd$Y
data[cur]=temp[i2++]; aE^tc'h~
else if(i2>r) \K 01F
data[cur]=temp[i1++]; g j`"|
else if(temp[i1] data[cur]=temp[i1++]; n3{m "h3
else fM]McZ9)D
data[cur]=temp[i2++]; ki6`d?
} xh>/bU!>
} H[%Fo
WG 9f>kE
} to Ei4u)m
(^g?/i1@d
改进后的归并排序: ]?F05!$*
9E_C u2B
package org.rut.util.algorithm.support; pj,.RcH@o
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import org.rut.util.algorithm.SortUtil; |7Z,z0 ?V
>vg!<%]W]
/** ]>@; 2%YvY
* @author treeroot l;>#O
* @since 2006-2-2 {+[~;ISL
* @version 1.0 %+$P<Rw7
*/ xmtbSRgK9
public class ImprovedMergeSort implements SortUtil.Sort { iUh_rX9A"
Ms?V1
private static final int THRESHOLD = 10; RVfRGc^lK
. iq.H
/* [Dq7mqr$
* (non-Javadoc) lwLK#_5u
* R~b9)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Gl'-tV
*/ ovCk:Vz
public void sort(int[] data) { ,TU!W|($
int[] temp=new int[data.length]; uMF\3T(x4
mergeSort(data,temp,0,data.length-1); 1$idF
} B@*BcE?
!?tWWU%P)
private void mergeSort(int[] data, int[] temp, int l, int r) { |aN0|O2
int i, j, k; fDq, )~D
int mid = (l + r) / 2; kETA3(h'
if (l == r) )iy>sa{
return; tZ[BfO
if ((mid - l) >= THRESHOLD) [p@NzS/
mergeSort(data, temp, l, mid); 4:cbasy
else mU_?}}aK,
insertSort(data, l, mid - l + 1); &tZ?%sr
if ((r - mid) > THRESHOLD) 6f=/vRAh$
mergeSort(data, temp, mid + 1, r); 5S7`gN.
else ^Gv<Xl
insertSort(data, mid + 1, r - mid); sVkR7 ^KsG
XrC{{K
for (i = l; i <= mid; i++) { S^)r,cC
temp = data; <E@7CG.=
} GMU<$x8o
for (j = 1; j <= r - mid; j++) { *cp|lW!ag
temp[r - j + 1] = data[j + mid]; u7j-uVG
} N(&FATZUW
int a = temp[l]; Nl_!%k:
int b = temp[r]; qx{.`AaZW
for (i = l, j = r, k = l; k <= r; k++) { ,@='.Qs4g
if (a < b) { 8<P$E!
data[k] = temp[i++]; 2xe_Q70II
a = temp; kVU|k-?2
} else { v}zo vEi
data[k] = temp[j--]; LO.4sO
b = temp[j]; zx-+u7qKH
} :G^`LyOM
} Vu\|KL|
} R)cns7oW
F.A<e #e?
/** A&9l|b-"
* @param data ~J<bwF
* @param l O%o#CBf0
* @param i NG'VlT
*/ LEhku4U.
private void insertSort(int[] data, int start, int len) { PR|Trnd&D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z55,S=i
} 77i |a]Kd
} no?)GQ
} &;)~bS(
} r %0
U_}$QW0'
堆排序： !u6~#.7
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package org.rut.util.algorithm.support; #C+Gk4"w
A</[Q>8
import org.rut.util.algorithm.SortUtil; %hrv~=
Qb|w\xT^Y
/** ?qO,=ms>-
* @author treeroot YfMe69/0I
* @since 2006-2-2 hQL9 Zl~
* @version 1.0 EE}NA{b
*/ }#'KME4
public class HeapSort implements SortUtil.Sort{ 8@hzw~>
LOnhFX
/* (non-Javadoc) MCh8Q|Yx4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "fpj"lf-
*/ ]nX.zE|F
public void sort(int[] data) { >.{ ..~"K
MaxHeap h=new MaxHeap(); =AD/5E,3
h.init(data); %4 SREq
for(int i=0;i h.remove(); 3]N}k|lb%
System.arraycopy(h.queue,1,data,0,data.length); h*MR5qa
} "[[fQpe4@
tMAa$XrZj
private static class MaxHeap{ ^<E+7
klf<=V
void init(int[] data){ e<9nt [
this.queue=new int[data.length+1]; o B6"D
for(int i=0;i queue[++size]=data; /#:RYM'Tu
fixUp(size); H&03>.b
} |Y'$+[TE
} K6Gc)jp:b
3~cOQ%#]4
private int size=0; A^K,[8VX
M%B[>pONb7
private int[] queue; l m
e-e{-pB6
public int get() { "L8V!M_e
return queue[1]; \B}W(^\wg;
} c<DYk f
Ra{B8)Q
public void remove() { COHJJONR
SortUtil.swap(queue,1,size--); mr('zpkRq
fixDown(1); pRU6jV 6e)
} 8W$="s2
file://fixdown Q ,;x;QR4
private void fixDown(int k) { N\uQ-XOi
int j; Ec\x;li! *
while ((j = k << 1) <= size) { .oK7E(QJ
if (j < size %26amp;%26amp; queue[j] j++; &\"fH+S
if (queue[k]>queue[j]) file://不用交换 QIV<!SO
break; 6U&Uyd)
SortUtil.swap(queue,j,k); z!3Z^d`
k = j; rmabm\QY
} %'=oMbi>i4
} Qy70/on9
private void fixUp(int k) { VuPET
while (k > 1) { dt \O7Rjw8
int j = k >> 1; <oXsn.'\
if (queue[j]>queue[k]) i3%~Gc63
break; ~qqtFjlG^
SortUtil.swap(queue,j,k); <GNOT"z
k = j; l?R_wu,Q
} 0l:5hD,)F
} eXOFAd]>u
X~DXx/9
} P9>C!0 -x
6AwnmGL(;;
} w-#0k.T
H9>&"=".
SortUtil： AN%.LK
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package org.rut.util.algorithm; RyhR#
xg^fM@#m
import org.rut.util.algorithm.support.BubbleSort; b@X@5SJFW
import org.rut.util.algorithm.support.HeapSort; YpKai3 B
import org.rut.util.algorithm.support.ImprovedMergeSort; d#d~t[=
import org.rut.util.algorithm.support.ImprovedQuickSort; vJCL m/}*
import org.rut.util.algorithm.support.InsertSort; }fCM_w
import org.rut.util.algorithm.support.MergeSort; 5rWRE-
import org.rut.util.algorithm.support.QuickSort; )m'_>-`^:
import org.rut.util.algorithm.support.SelectionSort; ZF t^q/pw
import org.rut.util.algorithm.support.ShellSort; ..T(9]h
IY19G U9
/** Kulg84<AwM
* @author treeroot B.G!7>=
* @since 2006-2-2 f2u2Ns0Ym
* @version 1.0 7wqwDE
*/ #NE^f2
public class SortUtil { *Vc=]Z2G^
public final static int INSERT = 1; Tk!b`9
public final static int BUBBLE = 2; `o3d@Vc
public final static int SELECTION = 3; \k,bz0
public final static int SHELL = 4; M/DTD98'N
public final static int QUICK = 5; 9F+bWo_m
public final static int IMPROVED_QUICK = 6; >ahj|pm
public final static int MERGE = 7; j41:]6
public final static int IMPROVED_MERGE = 8; z K(5&u
public final static int HEAP = 9; NN:TT\!v
;MMFF{
public static void sort(int[] data) { </=PN1=A
sort(data, IMPROVED_QUICK); c[y8"M5
} 1v4kN -
private static String[] name={ wtUG2 (
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OL'=a|g|c
}; 1P[Lz!C
3aqmK.`H
private static Sort[] impl=new Sort[]{ &f yFUg
new InsertSort(), LF~#4)B
new BubbleSort(), sZH7EK
new SelectionSort(), ~"mZ0E
new ShellSort(), {_~G+rqY
new QuickSort(), GWVdNYpmr
new ImprovedQuickSort(), d!t@A
new MergeSort(), (FaT{W{
new ImprovedMergeSort(), nKO&ffb'<
new HeapSort() } 8P}L@q
}; #TgJ d
[5VUcXGt*\
public static String toString(int algorithm){ 1IV 0a
return name[algorithm-1]; )1vojp 4Za
} oW[,EW+u
&rl>{Uvq
public static void sort(int[] data, int algorithm) { $Y`aS^IW
impl[algorithm-1].sort(data); "(NHA+s/
} vO_quQ[.
%p9bl ,x
public static interface Sort { c6HU'%v
public void sort(int[] data); x/7G0K2\}
} 6.|~~/
LU{Z
public static void swap(int[] data, int i, int j) { wB)+og-^1f
int temp = data; is(!_Iv
data = data[j]; \uk#pL
data[j] = temp; 9^^#I~-
} $<cZ<g5)
} Fsf22