[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; 2qe]1B;
} a@niig
int i1=l; uM74X^U
int i2=mid+1; z3(:a'
for(int cur=l;cur<=r;cur++){ ,R5z`O
if(i1==mid+1) 'o% .Qx
data[cur]=temp[i2++]; b,o@m
else if(i2>r) JmJNq$2#c
data[cur]=temp[i1++]; ,c.(&@
else if(temp[i1] data[cur]=temp[i1++]; ^K`Vqo
else %xhA2
data[cur]=temp[i2++]; V;%DS)-
} Ub%1OQ
} J>%uak<
)R5=GHmL
} x'hUw*
hH*/[|z
改进后的归并排序: *8#]3M]
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package org.rut.util.algorithm.support; 3{R7y
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import org.rut.util.algorithm.SortUtil; 7B8.;0X$W
+Qo]'xKr
/** Mi2lBEu,
* @author treeroot +RN|ZG&
* @since 2006-2-2 ddG5g
* @version 1.0 VMgO1-F
*/ aOK,Mm:iO
public class ImprovedMergeSort implements SortUtil.Sort { E6_.Q `!ll
Dvz}sQZ
private static final int THRESHOLD = 10; d|RDx;rl8
7@l.ZECJ1
/* !a<}Mpeg
* (non-Javadoc) 0w<G)p~%n
* 9#D?wR#J=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oH]"F
*/ 3*;S%1C^
public void sort(int[] data) { yjB.-o('
int[] temp=new int[data.length]; DqbU$jt`
mergeSort(data,temp,0,data.length-1); +y\mlfJ.-b
} Y.}8lh eH
HVkq{W|w
private void mergeSort(int[] data, int[] temp, int l, int r) { ^7$V>|
int i, j, k; sH`(y)`_
int mid = (l + r) / 2; jI~GRk
if (l == r) XTPf~Te,=
return; 2nA/{W\hC
if ((mid - l) >= THRESHOLD) kNDN<L
mergeSort(data, temp, l, mid); -eSZpzp
else fqQ(EVpQ
insertSort(data, l, mid - l + 1); &<\i37y
if ((r - mid) > THRESHOLD) V1!;Hvm]+
mergeSort(data, temp, mid + 1, r); c</u]TD
else 'X{J~fEI!
insertSort(data, mid + 1, r - mid); ;JAb8dyS2
1@p'><\
for (i = l; i <= mid; i++) { M@?,nzs K
temp = data; ?K/N{GK%{
} ITf, )?|]Y
for (j = 1; j <= r - mid; j++) { \Czuf
temp[r - j + 1] = data[j + mid]; dlB?/J<
} (cLcY%$
int a = temp[l]; kjOPsz*0
int b = temp[r]; zv[pfD7a
for (i = l, j = r, k = l; k <= r; k++) { 'awZ-$#
if (a < b) { |JRaskd
data[k] = temp[i++]; <$ oI
a = temp; ( V^C7ix:
} else { b am*&E%0K
data[k] = temp[j--]; Y*q_>kps"
b = temp[j]; [S#QGB19
} >UDb:N[
} :jUu_s}
} _q/UDf1
6nP-IKL
/** NNM+Z:
* @param data *^_ywqp
* @param l DgiMMmpE
* @param i qp)a`'Pq
*/ cJ#|mzup
private void insertSort(int[] data, int start, int len) { 9]^ CDL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JC}oc M j0
} Y9_OkcW)
} ji:E
} p?qW;1
} 3Sclr/t
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堆排序： jUg.Y98
u/g4s (a
package org.rut.util.algorithm.support; q]r?s%x
byB ESyV!O
import org.rut.util.algorithm.SortUtil; ZuIw4u(9
R;2q=%
/** /ig'p53jL
* @author treeroot NiPa-yRh
* @since 2006-2-2 z=/xv},
* @version 1.0 '<eeCe-
*/ $Z!7@_Ys
public class HeapSort implements SortUtil.Sort{ L4?)N&V
C^W9=OH
/* (non-Javadoc) lX*IEAc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o6LZ05Z-&
*/ 8R;A5o,
public void sort(int[] data) { Mu?hB{o1
MaxHeap h=new MaxHeap(); t3b64J[A{
h.init(data); UI}df<Ge
for(int i=0;i h.remove(); ~|t7
System.arraycopy(h.queue,1,data,0,data.length); ^N`bA8
} ZlxJY%oeu
s1| +LT,D
private static class MaxHeap{ r"uOf;m
X5`#da
void init(int[] data){ 9u&q{I
this.queue=new int[data.length+1]; _J+p[=[L
for(int i=0;i queue[++size]=data; Q $5U5hb
fixUp(size); ~DJ>)pp
} 6}aH>(3!A
} B]-~hP
)of?!>'S[
private int size=0; tbr1mw'G
G*x"drP
private int[] queue; 6;8Jy
z/&2Se:
public int get() { Yo$NE
return queue[1]; qh<h|C]V
} %:~LU]KX
7[}K 2.W.
public void remove() { ]J aV +b'O
SortUtil.swap(queue,1,size--); 1tMs\e-
fixDown(1); ,&X7D]
} }&I^1BHZs
file://fixdown yu>DVD
private void fixDown(int k) { ~ d!F|BH4
int j; (&y~\t]H
while ((j = k << 1) <= size) { M]JD(
if (j < size %26amp;%26amp; queue[j] j++; zLB7'7oP
if (queue[k]>queue[j]) file://不用交换 X\dPQwasM
break; 7Ne`F(c
SortUtil.swap(queue,j,k); 4?3*%_bDJ,
k = j; Rl2*oOVz
} W@(EEMhw
} O%KP,q&}Y
private void fixUp(int k) { "\]NOA*
while (k > 1) { y>DvD)
int j = k >> 1; ]*M-8_D
if (queue[j]>queue[k]) ">LX>uYmX-
break; 1aQR9zg%
SortUtil.swap(queue,j,k); ;jEDGKLq
k = j; cJ> #jl&
} ;[ag|YU$Y
} #'<s/7;~
$<[Q8V-
} QlmZ4fT[r
r?l7_aBv3
} D0f.XWd
NWt`X!
SortUtil： H]XY
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package org.rut.util.algorithm; r- :u*
8LMO2Wyq
import org.rut.util.algorithm.support.BubbleSort; O DLRzk(
import org.rut.util.algorithm.support.HeapSort; bZB7t`C5
import org.rut.util.algorithm.support.ImprovedMergeSort; !&k}YF
import org.rut.util.algorithm.support.ImprovedQuickSort; GQP2-cSZ
import org.rut.util.algorithm.support.InsertSort; :s}6a23
import org.rut.util.algorithm.support.MergeSort; v9t26>{~
import org.rut.util.algorithm.support.QuickSort; w>]?gN?8Fe
import org.rut.util.algorithm.support.SelectionSort; eA$wJ$*
import org.rut.util.algorithm.support.ShellSort; PDEeb.(.
!&n'1gJ)kd
/** BcfW94
* @author treeroot wM"PJG
* @since 2006-2-2 /4}B}"`Sl=
* @version 1.0 mT7B#^H
*/ kX2bU$1Q,i
public class SortUtil { {H5a.+-(bE
public final static int INSERT = 1; S?M'JoYy
public final static int BUBBLE = 2; #9a\Ab
public final static int SELECTION = 3; 1@}`dc
public final static int SHELL = 4; a->;K+
public final static int QUICK = 5; @Weim7r
public final static int IMPROVED_QUICK = 6; 4w\@D>@}H
public final static int MERGE = 7; /ehmy(zL
public final static int IMPROVED_MERGE = 8; 5a PPq~%
public final static int HEAP = 9; ~T{^7"q\
~'[0-_]=f
public static void sort(int[] data) { m4<5jC`-M
sort(data, IMPROVED_QUICK); [f?fA[,[
} X(`wj~45VX
private static String[] name={ );]9M~$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cmsg'KqqT
}; d3nMeAI AO
8)wxc1
private static Sort[] impl=new Sort[]{ =u5a'bp0;;
new InsertSort(), :?*|Dp1
new BubbleSort(), gyt[ZN_2
new SelectionSort(), 0Q]ZS
new ShellSort(), kTjx.
new QuickSort(), @&AUbxoj
new ImprovedQuickSort(), ?OYK'p.
new MergeSort(), <:,m
new ImprovedMergeSort(), ^{IF2_h"
new HeapSort() 3($cBC
}; Z/r=4
.]0u#fz0y
public static String toString(int algorithm){ AO R{Xm
return name[algorithm-1]; q$|Wxnz
} vSOO[.=
NM`5hd{
public static void sort(int[] data, int algorithm) { wc%Wy|d
impl[algorithm-1].sort(data); h2b,(
} zXop@"(e
biBo?k;4
public static interface Sort { ,#u"$Hz8p
public void sort(int[] data); _DlX F
} _:B/XZ
hLqRF4>L
public static void swap(int[] data, int i, int j) { co93}A,k
int temp = data; &tAhRMa
data = data[j]; vpS&w
data[j] = temp; f6I$d<
} *v' d1.Z
} @Nm;lZK