[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; KGg S"d
} 85q/|9D
int i1=l; Td'(RV
int i2=mid+1; rxu_Ssd@"
for(int cur=l;cur<=r;cur++){ d$3md<lIB
if(i1==mid+1) 9$;5J
data[cur]=temp[i2++]; vf{$2rC
else if(i2>r) 8TT#b?d
data[cur]=temp[i1++]; O8A1200
else if(temp[i1] data[cur]=temp[i1++]; &zX W
else @qp6Y_,E[
data[cur]=temp[i2++]; 'kt6%d2
} o?>0WSLlm
} nsU7cLf"^V
w a(Y[]V
} Yz_}*
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改进后的归并排序: N wk
i~]60M>
package org.rut.util.algorithm.support; y1%OH#:duD
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import org.rut.util.algorithm.SortUtil; zP #:Tv'
_.; PLq~0
/** zMbFh_dcq
* @author treeroot v9:J 55x
* @since 2006-2-2 5.{=Op!
* @version 1.0 KJec/qca
*/ #C&';HB;y
public class ImprovedMergeSort implements SortUtil.Sort { }={@_g#
uD=Kar
private static final int THRESHOLD = 10; z.-yL,Rc`-
#RR;?`,L}
/* qr%N/7
* (non-Javadoc) ~F'6k&A^q
* F8-GnTxa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yO)xN=o^\
*/ %eDSo9Y
public void sort(int[] data) { q@bye4Ry%W
int[] temp=new int[data.length]; #ay/VlD@
mergeSort(data,temp,0,data.length-1); p]RQ-0
} qzii[Mf
5GDg_9Bz
private void mergeSort(int[] data, int[] temp, int l, int r) { \n^;r|J7k
int i, j, k; $dF$-y<[0
int mid = (l + r) / 2; 3shd0q<
if (l == r) ricL.[v9S
return; N;i\.oY
if ((mid - l) >= THRESHOLD) zB'_YwW
mergeSort(data, temp, l, mid); e;9x%kNs!
else VI?kbqjo
insertSort(data, l, mid - l + 1); I8{ mkh
if ((r - mid) > THRESHOLD) >FqU=Q
mergeSort(data, temp, mid + 1, r); I !O5+Er
else Z=(Tq1t
insertSort(data, mid + 1, r - mid); k\\e`=
qD,/Qu62
for (i = l; i <= mid; i++) { =A(Az
temp = data; yacN=]SW5
} kzC4V
for (j = 1; j <= r - mid; j++) { 3;3 cTXR?=
temp[r - j + 1] = data[j + mid]; 3zMaHh)mj
} Zm6|aHx8v
int a = temp[l]; o^b5E=?>C
int b = temp[r]; XC4wm#R
for (i = l, j = r, k = l; k <= r; k++) { r(JP& @
if (a < b) { d2Ta&Md
data[k] = temp[i++]; $f+cd8j?o
a = temp; e<+b?@}=B
} else { 5aNvGI1
data[k] = temp[j--]; Jv?EV,S/e
b = temp[j]; DC0ON`
} NKl`IiGv
} co-1r/ -O
} k6Vs#K7a
2c<phmiK
/** hn u/
* @param data fBt7#Tc=U
* @param l GEi^3UD
* @param i }L*cP;m#
*/ 6T~xjAuJ3T
private void insertSort(int[] data, int start, int len) { DnPV Tp(>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M3 $MgsN:
} `{I-E5x
} S b3@7^
} Z@`HFZJ
} Ok~\
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堆排序： l=JK+uZ
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package org.rut.util.algorithm.support; .oo>NS
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import org.rut.util.algorithm.SortUtil; pc%_:>
ZK]C!8\2|
/** ]={{$}8.
* @author treeroot 2xd G&}$fa
* @since 2006-2-2 Z`b{r;`m8
* @version 1.0 F 'U Gp
*/ _#+~#U%5n
public class HeapSort implements SortUtil.Sort{ Ofg-gCF8
b fsTeW+
/* (non-Javadoc) H;$OCDRC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R{hKl#j;>
*/ ""ICdZ_A
public void sort(int[] data) { 7>J8\=
MaxHeap h=new MaxHeap(); &a p{|>3
h.init(data); /wL}+
for(int i=0;i h.remove(); v7/qJ9l
System.arraycopy(h.queue,1,data,0,data.length); ~V"D|U;i +
} GV([gs
LEkO#F(
private static class MaxHeap{ ;Z"6ve4
$R7n1
void init(int[] data){ >_]j{}~\k
this.queue=new int[data.length+1]; ;%AK< RT
for(int i=0;i queue[++size]=data; Jx@3zl
fixUp(size); Nd*zSsVlq
} -[4Xg!apO
} +)FB[/pXk
_*+ 7*vAL
private int size=0; @twClk.s
'kK}9VKl
private int[] queue; ~fE@]~f>
`bffw:;%
public int get() { YZdp/X6x
return queue[1]; nqt;Ge M
} Os@ d&wm
_rK}~y=0
public void remove() { RJ1Q.o
SortUtil.swap(queue,1,size--); .S17O}
fixDown(1); %J?;@ G)r
} m#mM2Guxe
file://fixdown &CFHH"OsT
private void fixDown(int k) { x5k6yHn
int j; Y0=qn'`.
while ((j = k << 1) <= size) { d$/BF&n
if (j < size %26amp;%26amp; queue[j] j++; UfSWdR)
if (queue[k]>queue[j]) file://不用交换 )W~w72j-
break; PWOV~`^;
SortUtil.swap(queue,j,k); Y8%0;!T
k = j; ss`P QN
} +:>JZ$
} w!WRa8C
private void fixUp(int k) { ?L@@;tt
while (k > 1) { G`,u40a
int j = k >> 1; SLtSqG7~
if (queue[j]>queue[k]) (A29ZH
break; aUW/1nQHa
SortUtil.swap(queue,j,k); n$XdSh/
k = j; BrJ o!@<
} mG831v?
} P3iA(3I24<
PMgQxM*h
} c6Lif)4
g4:VR:o
} Mo}H_8y
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SortUtil： 5M%,N-P^
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package org.rut.util.algorithm; yjEI/9_
Z-)[1+Hs
import org.rut.util.algorithm.support.BubbleSort; D@8jGcz62
import org.rut.util.algorithm.support.HeapSort; }B y)y;~
import org.rut.util.algorithm.support.ImprovedMergeSort; J&M1t#UN
import org.rut.util.algorithm.support.ImprovedQuickSort; h|bqyu
import org.rut.util.algorithm.support.InsertSort; [6D>f?z
import org.rut.util.algorithm.support.MergeSort; zKLn!b#>
import org.rut.util.algorithm.support.QuickSort; C"6Amnj
import org.rut.util.algorithm.support.SelectionSort; tbq|,"
import org.rut.util.algorithm.support.ShellSort; I[#U`9Dt
x6LjcRS|
/** $v]T8|h
* @author treeroot %v20~xW:o
* @since 2006-2-2 %|s+jeUDn|
* @version 1.0 Ua!aaq&
*/ /Q,mJ.CnSR
public class SortUtil { mI74x3 [
public final static int INSERT = 1; oudxm[/U
public final static int BUBBLE = 2; $DG?M6
public final static int SELECTION = 3; f^W;A"+
public final static int SHELL = 4; &b:1I7Cp*
public final static int QUICK = 5; oJN#C%r7
public final static int IMPROVED_QUICK = 6; $Xq!L
public final static int MERGE = 7; ]+X@ 7
public final static int IMPROVED_MERGE = 8; *}P~P$q%
public final static int HEAP = 9; Hh+ 2mkg
XI^QF;,
public static void sort(int[] data) { !qG7V:6
sort(data, IMPROVED_QUICK); `V##Y
} TYW&!sm
private static String[] name={ =>-Rnc@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h$2</J"
}; nr<4M0tIp
ZHa"isl$e
private static Sort[] impl=new Sort[]{ \-g)T}g,I
new InsertSort(), ov, hI>0!D
new BubbleSort(), -fDnA4;
new SelectionSort(), q@{Bt{$x
new ShellSort(), &v@a5L
new QuickSort(), JD|=>)
new ImprovedQuickSort(), ?`?)QE8
new MergeSort(), m;,N)<~
new ImprovedMergeSort(), #{;k{~;PF
new HeapSort() E 7{U|\
}; ,y#Kv|R
?{[ v+t#
public static String toString(int algorithm){ yU*8|FQbP
return name[algorithm-1]; tS6qWtE
} x<ZJb
aht[4(XH5
public static void sort(int[] data, int algorithm) { BI%$c~wS
impl[algorithm-1].sort(data); 'd9INz.
} 9P+-#B
[MUpxOAsd
public static interface Sort { 2fL;-\!y(
public void sort(int[] data); s*.hl.k.
} {ttysQ-
_z|65H
public static void swap(int[] data, int i, int j) { ds<2I,t
int temp = data; 9dx/hFA
data = data[j]; ;@oN s-
data[j] = temp; 8.O8No:'&
} b0Ps5G\ u
} cQ R]le%(