[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; `]i []|
} %*}Y6tl'|
int i1=l; "ju'UOcS/
int i2=mid+1; iE].&>w
for(int cur=l;cur<=r;cur++){ F@YKFk+a
if(i1==mid+1) BuOgOYh9
data[cur]=temp[i2++]; Fhf<T`
else if(i2>r) EGVM)ur
data[cur]=temp[i1++]; mtAE
else if(temp[i1] data[cur]=temp[i1++]; ?C-Towo=i
else 78 f$6J q
data[cur]=temp[i2++]; WXw}^v
} GVGlVAo|@
} V3Z]DA
x;s0j"`Jb
} lLhL`C!
QzvHm1,@
改进后的归并排序: oUZoj2G1
2JGL;U$
package org.rut.util.algorithm.support; EgjR^A1W2
XvTCK>1
import org.rut.util.algorithm.SortUtil; hX:"QXx
\ 0W!4D
/** zUJZ`seF
* @author treeroot h^UKT`9vt
* @since 2006-2-2 #W>QY Tp
* @version 1.0 <AH1i@4
*/ +Vb8f["+-
public class ImprovedMergeSort implements SortUtil.Sort { ^D%Za'
zP\7S}p7%
private static final int THRESHOLD = 10; R%Y`=pK>}
GLMm(
/* .B2]xfo"`
* (non-Javadoc) 3?I;ovsM
* Pe73g%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >$WQxbwM(
*/ NoE*/!Sr
public void sort(int[] data) { ia@'%8
int[] temp=new int[data.length]; (t+;O;
mergeSort(data,temp,0,data.length-1); ZBT1Y.qA
} 46@{5)Tq
: 18KR*;p
private void mergeSort(int[] data, int[] temp, int l, int r) { 1\*\?\T>_
int i, j, k; /D&%v*~E
int mid = (l + r) / 2; {76c%<`WaP
if (l == r) HBS\<}
return; 4`m~FNVS
if ((mid - l) >= THRESHOLD) G2bDf-1ew
mergeSort(data, temp, l, mid); N["W Ir
else nAIo{ F
insertSort(data, l, mid - l + 1); s#~GH6/
if ((r - mid) > THRESHOLD) 8BOZh6BV
mergeSort(data, temp, mid + 1, r); ,l YE
else W!Hm~9fz
insertSort(data, mid + 1, r - mid); ^&@w$
tGvG
for (i = l; i <= mid; i++) { -VxTx^)>
temp = data; 4fk8*{Y
} y;wx?1)
for (j = 1; j <= r - mid; j++) { !* Ti}oIo&
temp[r - j + 1] = data[j + mid]; x+ncc_2n&D
} _.IxRk)T
int a = temp[l]; o8/;;*
int b = temp[r]; X+L) -d
for (i = l, j = r, k = l; k <= r; k++) { @AHm!9?o
if (a < b) { U$]|~41#
data[k] = temp[i++]; 9{k97D/
a = temp; ^k5ll=}
} else { )'17r82a
data[k] = temp[j--]; <h%O?mkC
b = temp[j]; {;toI
} 4#x5MM
} $3`>{3x$
} ;<yd^Xs
'o|30LzYgQ
/** @1.QEyXG
* @param data SDu#Yt&mhh
* @param l aRG2@5
* @param i L pR''`2BT
*/ p&+;w
private void insertSort(int[] data, int start, int len) { 5^']+5_vb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *.L81er5~
} kt`nbm|aw
} /|#&px)G
} 7+X:LA~U
} "k]CW\H6z
d ;vT ~;
堆排序： 6"Bic rY
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package org.rut.util.algorithm.support; d>;&9;)H
2gO2jJlv
import org.rut.util.algorithm.SortUtil; MZ Aij
R|O8RlH
/** u[nyW3MZ
* @author treeroot }cT_qqw(f%
* @since 2006-2-2 ,0x y\u
* @version 1.0 ^Wxad?@
*/ H*#s }9=kZ
public class HeapSort implements SortUtil.Sort{ fRg`UI4w}
?5_7;Ha
/* (non-Javadoc) =FE|+!>PA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mM`wITy
*/ 6-?66gmT
public void sort(int[] data) { K>*a*[t0Sy
MaxHeap h=new MaxHeap(); -S3MH1TZ
h.init(data); $O9^SB
for(int i=0;i h.remove(); Fx-8M!
System.arraycopy(h.queue,1,data,0,data.length); 9U$EJN_G
} ^G6RjJxqp8
c478P=g=5
private static class MaxHeap{ Yjx|9_|Xn
v) vkn/:
void init(int[] data){ h/~n\0,J/
this.queue=new int[data.length+1]; _.L4e^N&UO
for(int i=0;i queue[++size]=data; <n]x#0p
fixUp(size); w)Covz'uf
} @V03a )6,h
} }CeCc0M
LX^u_Iu
private int size=0; u_ABt?'
H54R8O$
private int[] queue; |SyMngIY
r*Yi1j/
public int get() { }Ho Qwy|&
return queue[1]; >JiltF7H0
} sQMFpIrr
DGzw8|/(
public void remove() { 6/rFHY2q
SortUtil.swap(queue,1,size--); X7s `U5'l
fixDown(1); ^tXJj:wtS
} ]c! ;L5
file://fixdown .A6(D$O k
private void fixDown(int k) { y~)1 1]'>
int j; aH^RoG}
while ((j = k << 1) <= size) { &^W|iXi#
if (j < size %26amp;%26amp; queue[j] j++; I1PuHf Qs
if (queue[k]>queue[j]) file://不用交换 xQUu|gtL4
break; !Q#{o^{Y~
SortUtil.swap(queue,j,k); lT(oL|{#P
k = j; ;3'.C~
} 8MSC.0
} 0qX3v<+[6
private void fixUp(int k) { Th=eNL]
while (k > 1) { \hB5@e4i2
int j = k >> 1; uDEvzk42
if (queue[j]>queue[k]) ;VWAf;U;B
break; $sEy%-
SortUtil.swap(queue,j,k); 'Fmvu
k = j; ?Wz8[u
} eopD5
} L'F<ev
fl\ly`_
} `QXErw
3D2E?$dX
} nw-I|PVTNa
>Q(3*d >
SortUtil： 3+XOZh8
3`k;a1Z#O'
package org.rut.util.algorithm; Y'ow
'#k0a,<N
import org.rut.util.algorithm.support.BubbleSort; |`cKD >
import org.rut.util.algorithm.support.HeapSort; K"r*M.P>
import org.rut.util.algorithm.support.ImprovedMergeSort; E2m8UBS
import org.rut.util.algorithm.support.ImprovedQuickSort; qzTuxo0B
import org.rut.util.algorithm.support.InsertSort; M8tRjNWS?
import org.rut.util.algorithm.support.MergeSort; 3\B>lKhQ
import org.rut.util.algorithm.support.QuickSort; vvm0t"|\
import org.rut.util.algorithm.support.SelectionSort; hRCed4qA
import org.rut.util.algorithm.support.ShellSort; /Z$&pqs!
>/8yGBD
/** QDu2?EYZq
* @author treeroot d!$Z(W0
* @since 2006-2-2 :53)Nv
* @version 1.0 nVi[
*/ (2=Zm@Zpf
public class SortUtil { kO}AxeQ
public final static int INSERT = 1; +t?3T-@Ks
public final static int BUBBLE = 2; Xwhui4'w
public final static int SELECTION = 3; ( vca&wI!
public final static int SHELL = 4; 9T1ZL5
public final static int QUICK = 5; u,UmrR
public final static int IMPROVED_QUICK = 6; ?#45wC
public final static int MERGE = 7; 7Zh~lM
public final static int IMPROVED_MERGE = 8; |>#{[wko
public final static int HEAP = 9; O<,\^[x
k3uit+ge}
public static void sort(int[] data) { LbkF
sort(data, IMPROVED_QUICK); 9o+)?1\
} QDhOhGK
private static String[] name={ JhLgCnm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AT%u%cE-
}; Wr( y)D<y}
=17t- [
private static Sort[] impl=new Sort[]{ D}mjN=Y
new InsertSort(), FAj)OTI2S
new BubbleSort(), +1D+]*t_?[
new SelectionSort(), 3nhXZOO1
new ShellSort(), HBMhtfWW
new QuickSort(), M#8uv-L
new ImprovedQuickSort(), ;S>])5<
new MergeSort(), (Kv#m 3~
new ImprovedMergeSort(), m8o(J\]
new HeapSort() ]]*7\ :cb
}; k@'#@ t
smnSDS
public static String toString(int algorithm){ ~FN9 [aJF+
return name[algorithm-1]; zaK#Z?V}
} {$wjO7Glp
D`$hPYK|_
public static void sort(int[] data, int algorithm) { 8/=L2fNN[
impl[algorithm-1].sort(data); dzDqZQY$
} v^1pN>#%g
BDjn !3
public static interface Sort { ayfFVTy1d
public void sort(int[] data); &8vCZN^
} < Pky9o;
MZT23[+
public static void swap(int[] data, int i, int j) { s[w6FXt
int temp = data; ;oc&Hb
data = data[j]; IWY;="
data[j] = temp; 6,0_)O}\b
} ;<(W% _
} sk=-M8;\