[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; {9cjitl
} ,hp8b$
int i1=l; (N9g6V
int i2=mid+1; \4O_@d`A
for(int cur=l;cur<=r;cur++){ Sf2xI'
if(i1==mid+1) '*<I<? z;
data[cur]=temp[i2++]; "kjSg7m*:
else if(i2>r) O-3aU!L
data[cur]=temp[i1++]; StiWa<"c
else if(temp[i1] data[cur]=temp[i1++]; P#[?Kfi
else U&#`5u6'j
data[cur]=temp[i2++]; bKEiS8x
} Mt@Ma ]!
} 2G_]Y8
F!-%v5.y
} {+EnJ"
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改进后的归并排序: ?.Ip(g
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package org.rut.util.algorithm.support; >Sb3]$$
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import org.rut.util.algorithm.SortUtil; E;An':j
e%IbME]x
/** 6MLjU1
* @author treeroot ,;f5OUl?[
* @since 2006-2-2 r;+a%?P
* @version 1.0 AS'+p%(
*/ ]zn3nhBI
public class ImprovedMergeSort implements SortUtil.Sort { g8@F/$HY
"]\3t;IT
private static final int THRESHOLD = 10; Rr}m(e=
X8wtdd]64
/* R*r"};
* (non-Javadoc) /QQjb4S}
* D0>Pc9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,5AEtoF
*/ M`E}1WNQ?]
public void sort(int[] data) { EK&0Cn3z
int[] temp=new int[data.length]; `>OKV;~{z
mergeSort(data,temp,0,data.length-1); Eu%E2A|`I
} e0j4t-lL
amQTPNI
private void mergeSort(int[] data, int[] temp, int l, int r) { rK|("
int i, j, k; {qOqtkj
int mid = (l + r) / 2; OL_jU2,fv
if (l == r) U+C^"[B
return; cIcu=U
if ((mid - l) >= THRESHOLD) Ty#sY'%
mergeSort(data, temp, l, mid); f.$*9Fkw
else T|0d2aa
insertSort(data, l, mid - l + 1); 1U?5/Ja
if ((r - mid) > THRESHOLD) ?Iq{6O>D.
mergeSort(data, temp, mid + 1, r); mI]gDL1
else wvxsn!Ao&=
insertSort(data, mid + 1, r - mid); iio-RT?!
7|GSs=
for (i = l; i <= mid; i++) { 9%bErMHL
temp = data; ?[P>2oz
} ZX#60o8
for (j = 1; j <= r - mid; j++) { yvnDS"0<
temp[r - j + 1] = data[j + mid]; b*/Mco 9O
} ,eWLig
int a = temp[l]; ).A9>^6?{
int b = temp[r]; e m0 hTxb
for (i = l, j = r, k = l; k <= r; k++) { )lz~Rt;1i
if (a < b) { c((bUjS'=Y
data[k] = temp[i++]; 6As%<g=
a = temp; Eggu-i(rD
} else { $15H_X*!
data[k] = temp[j--]; pjs4FZ`Pd;
b = temp[j]; ),[@NK&=
} \CVHtV
} cG%X}ZV5
} VR\}*@pNp
HFlExau
/** gNc;P[
* @param data y7%SHYC p[
* @param l E!BzE_|i
* @param i El: @l%
*/ </1]eDnU
private void insertSort(int[] data, int start, int len) { |\/\FK]?]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pai8r%Zfu
} #Sx
} C"%B>e
} 1ltW9^cF}
} 8n-Xt7z
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堆排序： e-[PuJ
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package org.rut.util.algorithm.support; DHv86TvJt
ewHs ]V+U
import org.rut.util.algorithm.SortUtil; xUCq%r_
^SKHYo`,,N
/** ICr.Gwe3_
* @author treeroot Li"+`
* @since 2006-2-2 k_ywwkG9lU
* @version 1.0 h/5S2EB0!O
*/ 9 wbQ$>G9
public class HeapSort implements SortUtil.Sort{ &[_@f#
odC"#Rb
/* (non-Javadoc) &q9=0So4\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }f14# y;
*/ sR[!6[AA
public void sort(int[] data) { ",J&UTUh
MaxHeap h=new MaxHeap(); q=D8 Nz
h.init(data); 1q3"qYH
for(int i=0;i h.remove(); ~zG)<S"q
System.arraycopy(h.queue,1,data,0,data.length); ,UNk]vd
} kh:_,g
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private static class MaxHeap{ 0t}v@-abU
/ o I 4&W
void init(int[] data){ H{,1-&>|
this.queue=new int[data.length+1]; bgKC^Q/F
for(int i=0;i queue[++size]=data; K/ &`
fixUp(size); UcOP 0_/
} m'"H1~BW
} Ui"{0%
O(!;7v}
private int size=0; s}OL)rW=}
mH0OW
private int[] queue; T!B\ixt6
5`+9<8V
public int get() { /4 OmnE;
return queue[1]; 7aKI=;60.
} VjNr<~|d
]1Wxa?
public void remove() { OuEcoIK
SortUtil.swap(queue,1,size--); czpu^BT;;T
fixDown(1); =_zo
} =b>TFB=*N
file://fixdown W;2J~V!c
private void fixDown(int k) { %;v~MC@
int j; oy5K* }
while ((j = k << 1) <= size) { GD]epr%V
if (j < size %26amp;%26amp; queue[j] j++; ,d38TN
if (queue[k]>queue[j]) file://不用交换 5QuRwu_
break; zGyRzxFN
SortUtil.swap(queue,j,k); !/u
k = j; 4K~=l%l
} R6oD
} ~ZSX84~@u
private void fixUp(int k) { zPqJeYK
while (k > 1) { 2|& S2uq
int j = k >> 1; a{Y|`*7y
if (queue[j]>queue[k]) `y^\c#k
break; GdNhEv
SortUtil.swap(queue,j,k); #)xlBq4cZ
k = j; 'uDx$AkY
} zEtsMU
} tzGQo5\
qve'Gm)
} {.AN4
FGHCHSqLq
} e1h7~ j
nb=mY&q}~
SortUtil： H@G$K@L
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package org.rut.util.algorithm; `vAcCahM
!37I2*+4
import org.rut.util.algorithm.support.BubbleSort; Gt*K:KT=L
import org.rut.util.algorithm.support.HeapSort; l~o!(rpX
import org.rut.util.algorithm.support.ImprovedMergeSort; tJ K58m$
import org.rut.util.algorithm.support.ImprovedQuickSort; sBa:|(Y.
import org.rut.util.algorithm.support.InsertSort; a`%`9GD
import org.rut.util.algorithm.support.MergeSort; `G\Gk|4;2
import org.rut.util.algorithm.support.QuickSort; 5G\OINxy
import org.rut.util.algorithm.support.SelectionSort; DMG'8\5C
import org.rut.util.algorithm.support.ShellSort; O{~Xp!QQt
Q\kWQOB_
/** I@6+AU~,6
* @author treeroot v/rBjUc+X
* @since 2006-2-2 "q M
* @version 1.0 2DFsMT>X
*/ %|}*xMQ
public class SortUtil { nng|m
public final static int INSERT = 1; ]goJ- &
public final static int BUBBLE = 2; [niFJIsc
public final static int SELECTION = 3; aHuMm&
public final static int SHELL = 4; Vlz\n
public final static int QUICK = 5; GLecBF+>F
public final static int IMPROVED_QUICK = 6; $RY-yKmi
public final static int MERGE = 7; "J+L]IC?AD
public final static int IMPROVED_MERGE = 8; bH/4f93Nb
public final static int HEAP = 9; "kFH*I+v
*izCXfW7
public static void sort(int[] data) { ^Z9bA(w8
sort(data, IMPROVED_QUICK); AP,ZMpw
} z/4<x?}+hE
private static String[] name={ ^0|:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6#*_d,xQT
}; N~=PecQ
TCRTC0_}k
private static Sort[] impl=new Sort[]{ |\uj(|
new InsertSort(), W7uX
new BubbleSort(), K<5yjG8&
new SelectionSort(), OXQA(%MK
new ShellSort(), iE"]S )
new QuickSort(), {Dl@/fz
new ImprovedQuickSort(), "y"oV[`
new MergeSort(), ynM~&]fk#k
new ImprovedMergeSort(), & tT6.@kH
new HeapSort() : pUu_
}; IKP_%R8.
JRz)A4P
public static String toString(int algorithm){ e`={_R{N
return name[algorithm-1]; kEC^_sO"
} d)!'5ZrM
V~KWy@7
public static void sort(int[] data, int algorithm) { X:Wd%CHP
impl[algorithm-1].sort(data); Nkj$6(N=zJ
} ]j:k!=Ss?
P!f0&W
public static interface Sort { ?sdSi--
public void sort(int[] data); +ho=0>
} Pd&KAu|<`
TPBQfp%HU
public static void swap(int[] data, int i, int j) { .qohHJ&
int temp = data; yW'{Z]09
data = data[j]; ),`jMd1`
data[j] = temp; 9HFEp-"
} *cWHl@4
} sz270k%[