[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; (BGflb
} upiYo(sN.
int i1=l; 7M<co,"
int i2=mid+1; C(n_*8{
for(int cur=l;cur<=r;cur++){ ak\[+wQ
if(i1==mid+1) ^/)%s3
data[cur]=temp[i2++]; b\p2yJ\
else if(i2>r) %R P\,|
data[cur]=temp[i1++]; \G2PK&)F
else if(temp[i1] data[cur]=temp[i1++]; K"8!
else > 1=].
data[cur]=temp[i2++]; EN5F*s@r
} q +!i6!6r
} S|]\q-qA&
Ge1"+:tbJ
} PAXm
MB+a?u0\
改进后的归并排序: A8 !&Y;d
oB+Ek~{z]
package org.rut.util.algorithm.support; 9JJk\,
814cCrr,o
import org.rut.util.algorithm.SortUtil; |#zj~>7?
0~BZh%s< (
/** A().1h1_k
* @author treeroot BK1I_/_!
* @since 2006-2-2 wQYW5X
* @version 1.0 f1|&umJ$
*/ -'T^gEd)c
public class ImprovedMergeSort implements SortUtil.Sort { h059DiH
|xrnLdng0R
private static final int THRESHOLD = 10; \lF-]vz*
|y4j:`@.
/* krRnE7\m
* (non-Javadoc) f1q0*)fk
* \7G.anY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0E#?H0<OeG
*/ CP Ju=
public void sort(int[] data) { Va^(cnwa
int[] temp=new int[data.length]; g/gaPc*86
mergeSort(data,temp,0,data.length-1); lT_dzO
} 5C-XQS1
'^(qlCI
private void mergeSort(int[] data, int[] temp, int l, int r) { +|qw>1J(
int i, j, k; PV-B<Y
int mid = (l + r) / 2; =g?k`vp
if (l == r) :XB^IyO-A
return; c]NZGn*
if ((mid - l) >= THRESHOLD) 1cD
mergeSort(data, temp, l, mid); ~)*uJ wW/a
else ] -%B4lT
insertSort(data, l, mid - l + 1); ?@7Reh\
if ((r - mid) > THRESHOLD) Tr, zV
mergeSort(data, temp, mid + 1, r); 3[<D"0#},
else .gY=<bG/fA
insertSort(data, mid + 1, r - mid); 2:&L|;
xXCsJ9]
for (i = l; i <= mid; i++) { ne%(`XY{Q]
temp = data; 0F6~S
} Gm=e;X;r
for (j = 1; j <= r - mid; j++) { \lK `
temp[r - j + 1] = data[j + mid]; G,6 i!M
} Tj6kCB
int a = temp[l]; av~kF
int b = temp[r]; o_&Qb^W
for (i = l, j = r, k = l; k <= r; k++) { dte-2?%~j
if (a < b) { 3\K;y>NK
data[k] = temp[i++]; s3=slWY=
a = temp; K+`deH_d
} else { } wx(P3BHD
data[k] = temp[j--]; Mg&<W#$K
b = temp[j]; DS;.)P"
} Nb)Mh
} ( ;_AP.
} "Rn@yZV
UQjYWXvi
/** b?:?"
* @param data G-'CjiMu
* @param l PsBLAr\ah
* @param i x[mh^V5ld
*/ -m$2"_
private void insertSort(int[] data, int start, int len) { 3e1%G#fu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `:Zgq+j&
} p,14'HS%@
} 6E9o*YSk
} h$p}/A
} 4)Ew rU
qoEZ>
堆排序： "8E=*2fcw
=.qPjp_Qd
package org.rut.util.algorithm.support; 37*2/N2
X39%O'
import org.rut.util.algorithm.SortUtil; S 9;FD3
,mM7g
/** <DhuY/o
* @author treeroot )lP(isFP
* @since 2006-2-2 Z<'iT%6+r
* @version 1.0 H=9{|%iS
*/ l@`n4U.Gwl
public class HeapSort implements SortUtil.Sort{ |][PbN D
A-u!{F
/* (non-Javadoc) n(_wt##wE~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B5[As8Sa
*/ M-(,*6Q
public void sort(int[] data) { 1jd.tup
MaxHeap h=new MaxHeap(); _)6r@fZ.p
h.init(data); \mqrDaB
for(int i=0;i h.remove(); NRI[|
System.arraycopy(h.queue,1,data,0,data.length); f6m h_l
} G<Urj+3/Xo
%!R\-Vej
private static class MaxHeap{ % -.V6}V
_~;K]
void init(int[] data){ a!.Y@o5Ku
this.queue=new int[data.length+1]; k=X)axt1
for(int i=0;i queue[++size]=data; z6fY_LL
fixUp(size); yF-`f _
} # S0N`V
} zUWeOR'X
SPnW8
private int size=0; % @!hf!
h<7@3Ur
private int[] queue; zrwzI+4
K{XE|g
public int get() { Mtn{63cK
return queue[1]; [@NW
} Fe2t[y:8h
{ITxHt
public void remove() { 4^!%>V"d/
SortUtil.swap(queue,1,size--); |#Q0UM|'Q
fixDown(1); 10tTV3`IM
} a[=ub256S
file://fixdown h]}DMVV]
private void fixDown(int k) { dwb^z+
int j; ()Qq7/
while ((j = k << 1) <= size) { M$} AJS%8
if (j < size %26amp;%26amp; queue[j] j++; 3bHB$n
if (queue[k]>queue[j]) file://不用交换 (W#^-*$R
break; %0vWyU:K9
SortUtil.swap(queue,j,k); ~SI G0U8
k = j; r+tHVh
} [buLo*C4:
} $p*.[)
private void fixUp(int k) { iKv"200h(
while (k > 1) { I")mg~f
int j = k >> 1; '@1C$0tx
if (queue[j]>queue[k]) f67t.6Vw2+
break; Dy{lgT0k
SortUtil.swap(queue,j,k); 8&CQx*
k = j; xEufbFAN?
} $Qxy@vU
} HTSk40V
H>%L@Btw
} .&n!4F'
'Jd*r(2d
} kpMo7n
.u]d5z BR
SortUtil： v=DC3oh-
3il$V78|
package org.rut.util.algorithm; FJFO0Hb6
<&tdyAT?&
import org.rut.util.algorithm.support.BubbleSort; E0.o/3Gw6
import org.rut.util.algorithm.support.HeapSort; znAo]F9=J"
import org.rut.util.algorithm.support.ImprovedMergeSort; 9}+X#ma.Nc
import org.rut.util.algorithm.support.ImprovedQuickSort; B[d%?L_
import org.rut.util.algorithm.support.InsertSort; F:AVik
import org.rut.util.algorithm.support.MergeSort; I~nz~U:ak
import org.rut.util.algorithm.support.QuickSort; Lzx2An@R
import org.rut.util.algorithm.support.SelectionSort; spWo{
import org.rut.util.algorithm.support.ShellSort; }- wK
YR[I,j
/** 9xeg,#1
* @author treeroot { PS0.UZ
* @since 2006-2-2 GE=PaYz
* @version 1.0 >[Tt'.S!?
*/ u,]qrlx{
public class SortUtil { :Xu9`5
public final static int INSERT = 1; gP>W* ]0r1
public final static int BUBBLE = 2; lBudC
public final static int SELECTION = 3; [rz5tfMp
public final static int SHELL = 4; YUTI)&y
public final static int QUICK = 5; +K,T^<F;
public final static int IMPROVED_QUICK = 6; 7tne/Yz
public final static int MERGE = 7; szD9z{9"y
public final static int IMPROVED_MERGE = 8; #X0Xc2}{f
public final static int HEAP = 9; _/YM@%d
xl9S=^`=
public static void sort(int[] data) { b&'YW*W
sort(data, IMPROVED_QUICK); #q5tG\gnM
} ndw&F'.r
private static String[] name={ fr}.#~{5Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o ^ 08<
}; 2s}G6'xE]P
MjbgAH-
private static Sort[] impl=new Sort[]{ h)s&Nqg1B
new InsertSort(), M^G9t*I
new BubbleSort(), 9U3.=J
new SelectionSort(), <@c@`K
new ShellSort(), g!Ui|]BI9
new QuickSort(), Iu^I?c[
new ImprovedQuickSort(), |W}D_2
new MergeSort(), 0 c]]
new ImprovedMergeSort(), d+"F(R9
new HeapSort() cv. j
}; m%c]+Our`
5x!rT&!G
public static String toString(int algorithm){ yh'*eli
return name[algorithm-1]; -J0I2D
} S|?P#.=GX
g'2}Y5m$`
public static void sort(int[] data, int algorithm) { @.,'A[D!K
impl[algorithm-1].sort(data); ;D@F
} gUYTVp Vf
a%`L+b5-$
public static interface Sort { @9l$jZ~x
public void sort(int[] data); 2nCHL'8N
} X]dN1/_
EAE#AB-A
public static void swap(int[] data, int i, int j) { yoz-BS
int temp = data; )(pgJLW
data = data[j]; L]l?_#*x
data[j] = temp; s.a@uR^
} s+^1\
} 4\j1+&W