[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; 4mn&4e
} y>*xVK{D
int i1=l; 6\61~u~
int i2=mid+1; I|# 5NE6
for(int cur=l;cur<=r;cur++){ W+*5"h
if(i1==mid+1) UX]L;kI
data[cur]=temp[i2++]; F#|:`$t
else if(i2>r) gIA@l`"
data[cur]=temp[i1++]; sBV4)xM
else if(temp[i1] data[cur]=temp[i1++]; w&xDOyW]
else O$IjNx
data[cur]=temp[i2++]; 3BpZX`l*p
} au,t%8AC
} ^<X@s1^#
<L&m4O#|
} y<b{Ji e
/x{s5P3
改进后的归并排序: Py`N4y~
erO>1 ,4S
package org.rut.util.algorithm.support; GWvH[0
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import org.rut.util.algorithm.SortUtil; L.]$6Q0
&sF^Fgg{
/** G<M:Ak+~
* @author treeroot s&GJW@ |
* @since 2006-2-2 nk3y"ne7
* @version 1.0 *Sh^J+j
*/ nNXgW
public class ImprovedMergeSort implements SortUtil.Sort { *'"^NSJ
<, 3ROo76
private static final int THRESHOLD = 10; c^`]`xiX
%7O?JI[
/* A{B/lX)
* (non-Javadoc) XNgDf3T
* w>b-} t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JJRK7\~$
*/ |a{Q0:
public void sort(int[] data) { )/t?!T.[
int[] temp=new int[data.length]; C;(t/zh
mergeSort(data,temp,0,data.length-1); Ged[#Q
} lDmtQk-SN
$`Ix:gi
private void mergeSort(int[] data, int[] temp, int l, int r) { fL]Pztsk+
int i, j, k; l|5fE1K9U
int mid = (l + r) / 2; I5h[%T
if (l == r) [%&ZPJT%i
return; @]bPVG?d
if ((mid - l) >= THRESHOLD) g:0#u;j^7
mergeSort(data, temp, l, mid); _j_x1.l
else 'H7x L
insertSort(data, l, mid - l + 1); !;_H$r0
if ((r - mid) > THRESHOLD) `yF`x8
mergeSort(data, temp, mid + 1, r); !z{-?o/
else z4E|Ai
insertSort(data, mid + 1, r - mid); kF>o.uSV
{)AMwq
for (i = l; i <= mid; i++) { 4~U'TE @
temp = data; jmg!Ml
} pKS {6P
for (j = 1; j <= r - mid; j++) { mXUYQ82
temp[r - j + 1] = data[j + mid]; -Z-IF#%
} 0kDK~iT
int a = temp[l]; Lr`1TH,
int b = temp[r]; DQwGUF'(
for (i = l, j = r, k = l; k <= r; k++) { y$<Vha
if (a < b) { ttXjn
data[k] = temp[i++]; L,;D@Xi
a = temp; <W]g2>9o9
} else { ];%0qb
data[k] = temp[j--]; KsrjdJx, '
b = temp[j]; ^*~;k|;&
} n4lutnF
} |j3'eW&=
} nADX0KI
!`bio cA
/** ,7XtH>2s
* @param data SR*wvQnOx
* @param l H'F6$ypoS
* @param i >%E([:$A
*/ m0{!hF[^
private void insertSort(int[] data, int start, int len) { ) _ I,KEe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5d@t7[]
} ()sTb>L
} JY!l!xH(6
} 7=]i~7uy
} flgRpXt
+\Q?w?DE|
堆排序： m*X[ Jtr
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package org.rut.util.algorithm.support; |w}xl'>q
{YUIMd!Y
import org.rut.util.algorithm.SortUtil; [7m1Q<
ny-7P;->8
/** I]!^;))
* @author treeroot d2s OYCKe
* @since 2006-2-2 g]UBZ33y
* @version 1.0 ^TB>.c@`*
*/ %r)avI
public class HeapSort implements SortUtil.Sort{ F_uY{bg
3?E8\^N\n
/* (non-Javadoc) j]0^y}5f+s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -G,^1AL>
*/ [Pe#kzLX
public void sort(int[] data) { $(Ugtimdv
MaxHeap h=new MaxHeap(); W0jZOP5_.$
h.init(data); 7kKy\W
for(int i=0;i h.remove(); L}#0I+Ml7
System.arraycopy(h.queue,1,data,0,data.length); 0N=X74
} u9=SpgB#
f`>/ H!<2
private static class MaxHeap{ "!K'A7.^
|+ge8uu?C
void init(int[] data){ <\zCpkZ'B
this.queue=new int[data.length+1]; D}3XFuZs_
for(int i=0;i queue[++size]=data; 6a}"6d/sTL
fixUp(size); $>U# W:
} TO,rxf
} `IINq{Zk
FI8Oz,
private int size=0; A$g+K,.l
[~D|peM3
private int[] queue; :`)~-`_
*=Z26
public int get() { PN+G:Qv
return queue[1]; hl&-\dc+
} g/=K.
t0:AScZY
public void remove() { 6I_Hd>4
SortUtil.swap(queue,1,size--); N?dvuB
fixDown(1); {5*|C-WWtG
} bU 63X={
file://fixdown 0^'B3$>
private void fixDown(int k) { 0i[zup
int j; \bCX=E-
while ((j = k << 1) <= size) { =rPrPb
if (j < size %26amp;%26amp; queue[j] j++; Kt>X[o3m,
if (queue[k]>queue[j]) file://不用交换 @&1Wyp
break; 9@$,oM=
SortUtil.swap(queue,j,k); ^0W(hA
k = j; 52zGJ I*
} zm9TvoC%}
} CBf7]n0H
private void fixUp(int k) { +5v}q.:+
while (k > 1) { #$vRJ#S}U
int j = k >> 1; &@"]+33
if (queue[j]>queue[k]) ?B.~AUN
break; G)>W'yxQ
SortUtil.swap(queue,j,k); 1gO2C$
k = j; N12:{U
} A{o'z_zC
} uQLlA&I"
{mE! Vf
} p<WFqLe(":
7=4A;Ybq
} VVWM9x
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SortUtil： e2$]g>
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package org.rut.util.algorithm; E& 36H
XM Vq-8B0
import org.rut.util.algorithm.support.BubbleSort; [AEBF2OIv
import org.rut.util.algorithm.support.HeapSort; TY;U2.Ud
import org.rut.util.algorithm.support.ImprovedMergeSort; NCA{H^CL
import org.rut.util.algorithm.support.ImprovedQuickSort; FqA3{
import org.rut.util.algorithm.support.InsertSort; D y6$J3 r
import org.rut.util.algorithm.support.MergeSort; N$?cX(|7
import org.rut.util.algorithm.support.QuickSort; !Q-wdzsp?
import org.rut.util.algorithm.support.SelectionSort; V9x8R
import org.rut.util.algorithm.support.ShellSort; $mco0%$
zvv:dC/p<
/** )He#K+[}^4
* @author treeroot fm1X1T.
* @since 2006-2-2 %R0v5=2'
* @version 1.0 qUhRu>
*/ . ,NB( s`
public class SortUtil { KiLvI,9y
public final static int INSERT = 1; z)F#u:t
public final static int BUBBLE = 2; 1H:ea7YVU
public final static int SELECTION = 3; oL/o*^
public final static int SHELL = 4; (U.**9b;
public final static int QUICK = 5; Tc ZnmN
public final static int IMPROVED_QUICK = 6; w'Z!;4E0
public final static int MERGE = 7; )&W|QH=AI
public final static int IMPROVED_MERGE = 8; ^>~dlS
public final static int HEAP = 9; !^U6Z@&/R
7INk_2
public static void sort(int[] data) { >3;^l/2c
sort(data, IMPROVED_QUICK); ](r ^.k,R
} OsW"CF2
private static String[] name={ HOYq?40.R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5!fSW2N
}; #G_/.h@
x;$|#]+
private static Sort[] impl=new Sort[]{ <Mgf]v.QS
new InsertSort(), ~] =?b)B
new BubbleSort(), ||TtNH
new SelectionSort(), [h}K$q
new ShellSort(), vW.%[]
new QuickSort(), %u]6KrG18b
new ImprovedQuickSort(), 3 %(Y$8U
new MergeSort(), EHf)^]Z
new ImprovedMergeSort(), sV0Z
new HeapSort() #!!AbuhzK{
}; >.dHt\
993d/z|DX
public static String toString(int algorithm){ Y4~vC[$x'
return name[algorithm-1]; 3\!F\tqD \
} \3NS>v[1
I"!'AI-
public static void sort(int[] data, int algorithm) { ":WYcaSi
impl[algorithm-1].sort(data); *d*oS7
} ;R1B9-,
l[n@/%2
public static interface Sort { ^JhFI*
public void sort(int[] data); SR*Gqx
} QJ4AL3 ^6
HY;oy(
public static void swap(int[] data, int i, int j) { 6c\DJD
int temp = data; i^%-aBZ
data = data[j]; < tQc_
data[j] = temp; l=Wd,$\
} \ZnN D1A
} IlHY%8F{