[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; S U2`H7C*
} V)!Oss;i
int i1=l; I4qzdD
int i2=mid+1; \Qu~iB(Y
for(int cur=l;cur<=r;cur++){ Gp@Y=mU
if(i1==mid+1) 1MfRFv
data[cur]=temp[i2++]; P)>WIQSr
else if(i2>r) sl |S9Ix
data[cur]=temp[i1++]; o)"}DeV$&
else if(temp[i1] data[cur]=temp[i1++]; 0)k%nIhj
else 4?jhZLBU
data[cur]=temp[i2++]; OaU} 9&
} rZ:
} ?kE2S6j5
*=^_K`y
} 'qQDM_+
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改进后的归并排序: ?D57HCd`n
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package org.rut.util.algorithm.support; 4\Y=*X
[RC|W%<Z>
import org.rut.util.algorithm.SortUtil; lSXhHy
}! zjj\g^
/** W!XFaA$
* @author treeroot a^4(7
* @since 2006-2-2 F_YZV)q!W
* @version 1.0 z7HC6{g%X
*/ hl6al:Y
public class ImprovedMergeSort implements SortUtil.Sort { c?jjY4u
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private static final int THRESHOLD = 10; clG3t eC
asPD>jc
/* Lm-}W "7
* (non-Javadoc) \ E[0KvN;O
* PCt&66F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -s:JD J*
*/ sDJ5'ul
public void sort(int[] data) { <pK;D
int[] temp=new int[data.length]; !l.Rv_o<O
mergeSort(data,temp,0,data.length-1); z_A%>E4
} 05|t
Y<a/(`
private void mergeSort(int[] data, int[] temp, int l, int r) { Og30&a!~F
int i, j, k; =jg!@H=_i
int mid = (l + r) / 2; Y*wbFL6`
if (l == r) i,;Q
return; .}Bb :*@
if ((mid - l) >= THRESHOLD) -cY/M~
mergeSort(data, temp, l, mid); 0A5xG&
else "=4=Q\0PT
insertSort(data, l, mid - l + 1); w$61+KHK
if ((r - mid) > THRESHOLD) b$rBxe\
mergeSort(data, temp, mid + 1, r); "]zq<LmX
else @OwU[\6fc}
insertSort(data, mid + 1, r - mid); >6jyd{
R`TM@aaS:
for (i = l; i <= mid; i++) { [>C^ 0\Z~
temp = data; w:z_EV!&
} V!]e#QH;
for (j = 1; j <= r - mid; j++) { -J? df
temp[r - j + 1] = data[j + mid]; f4@Dn >BJ
} {a%T <WW
int a = temp[l]; &S3szhe
int b = temp[r]; El"XF?OgpP
for (i = l, j = r, k = l; k <= r; k++) { DU}q4u@)
if (a < b) { !X[lNtO
data[k] = temp[i++]; IO v4Zx<)
a = temp; p)TH^87
} else { ~a/yLI"'g
data[k] = temp[j--]; !B-&I E?
b = temp[j]; `DWzp5Ax
} P d*}0a~
} 3bE^[V8/
} \?g)jY
H26j]kY
/** x%cKTpDh!
* @param data %pTbJaM\U
* @param l 4I{|M,+
* @param i Eq'{uV:
*/ gK#aC[
private void insertSort(int[] data, int start, int len) { dQ;rO$co
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M}38uxP
} ^@{'! N
} ^0X86
} ] +Gi~
} j q1qj9KZ
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堆排序： 8)R)h/E>
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package org.rut.util.algorithm.support; Z)6bqU<LQE
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import org.rut.util.algorithm.SortUtil; HQf[T@
kQX,MP(
/** G=~T)e
* @author treeroot U%w-/!p
* @since 2006-2-2 wond>m 3
* @version 1.0 ce+\D'q[
*/ iW)FjDTP
public class HeapSort implements SortUtil.Sort{ vcV=9q8P1
CHBCi) '6h
/* (non-Javadoc) b%|%Rek8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8V~w3ssz
*/ XPWK"t01
public void sort(int[] data) { mYa0_P%^
MaxHeap h=new MaxHeap(); puMpUY
h.init(data); ';b/D
for(int i=0;i h.remove(); (qB$I\
System.arraycopy(h.queue,1,data,0,data.length); QdDdrR^&
} 8iX?4qj{P
N15{7,
private static class MaxHeap{ 1s!hl{n<~
H6'xXS
void init(int[] data){ w="I*7c@
this.queue=new int[data.length+1]; n"_EDb
for(int i=0;i queue[++size]=data; ;=UrIA@y;=
fixUp(size); W P.6ea7k
} 4(B,aU>y
} 2psI\7UjA]
m$[\(Z(/
private int size=0; ih1SN,/
q;B-np?U
private int[] queue; '1.T-.4>&
{u9VHAXCf
public int get() { V3I&0P k
return queue[1]; O a-ZeCq
} 9"MC<
E;-R<X5n
public void remove() { ^dqyX(
SortUtil.swap(queue,1,size--); .F 3v)
fixDown(1); j##IJm
} ]9A9q<lZ
file://fixdown 6aMqU?-
private void fixDown(int k) { U_M> Q_r(
int j; $C^94$W
while ((j = k << 1) <= size) { S=M$g#X`5
if (j < size %26amp;%26amp; queue[j] j++; &x;v&
if (queue[k]>queue[j]) file://不用交换 <R]?8L0{h
break; B8B^@
SortUtil.swap(queue,j,k); ^>k[T.
k = j; wU+ofj; +I
} !;iySRZr
} \>9%=32u.
private void fixUp(int k) { K*CO%:,-
while (k > 1) { jQsucs5$h
int j = k >> 1; 4y)"IOd#|
if (queue[j]>queue[k]) oD!72W_:
break; N,Y<mX
SortUtil.swap(queue,j,k); *K m%Vl
k = j; 6 D~b9e
} 4[+n;OI
} -?'u"*#1,
m=j7 vb
} ds7I .Q'
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} dwJ'hg
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SortUtil： Xg.\B1d
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package org.rut.util.algorithm; >Qt#6X|
m0un=>{
import org.rut.util.algorithm.support.BubbleSort; 6!b96bV
import org.rut.util.algorithm.support.HeapSort; 6,s@>8n
import org.rut.util.algorithm.support.ImprovedMergeSort; \zgRzO'N
import org.rut.util.algorithm.support.ImprovedQuickSort; gpE5ua&
import org.rut.util.algorithm.support.InsertSort; ot-!_w<
import org.rut.util.algorithm.support.MergeSort; $IB@|n
import org.rut.util.algorithm.support.QuickSort; "R):B~8|H{
import org.rut.util.algorithm.support.SelectionSort; O!/J2SfuDH
import org.rut.util.algorithm.support.ShellSort; bO^%#<7
=_L"x~0I-
/** 1Qf5H!5vx
* @author treeroot Mgf80r=
* @since 2006-2-2 &)\0mpLK9
* @version 1.0 JJ7-$h'0q
*/ QD /| zi
public class SortUtil { \? MuORg
public final static int INSERT = 1; eFZ`0V0
public final static int BUBBLE = 2; f9OVylm
public final static int SELECTION = 3; VbA#D4;
public final static int SHELL = 4; 9{ciD "!&V
public final static int QUICK = 5; 6RzTSb
public final static int IMPROVED_QUICK = 6; S/7D}hJ
public final static int MERGE = 7; vbFY}
public final static int IMPROVED_MERGE = 8; 8+gSn
public final static int HEAP = 9; GytI_an8
> -k$:[l
public static void sort(int[] data) { m,)Re8W-
sort(data, IMPROVED_QUICK); (Dc dR:/=
} N}.h_~6
private static String[] name={ p3sz32RX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a>""MC2
}; HykJ}ezX4
B`T9dL[E4
private static Sort[] impl=new Sort[]{ [f- #pew
new InsertSort(), Cn+TcdHX
new BubbleSort(), c;(}Ih(#
new SelectionSort(), ;k!Ej-(
new ShellSort(), rQ~%SUM7
new QuickSort(), 63F0Za}h
new ImprovedQuickSort(), SM0=
new MergeSort(), uQpV1o5iA
new ImprovedMergeSort(), _Se>X=
new HeapSort() &/a/V
}; V&\ZqgDF
c;wt9J.f
public static String toString(int algorithm){ gsT%_2>CL
return name[algorithm-1]; 0=-h9W{zI
} dd98vVj
yK[~(!c5
public static void sort(int[] data, int algorithm) { !cWKY\lpv
impl[algorithm-1].sort(data); U/{cYX
} )RA7Y}e|m
]+fL6"OD/2
public static interface Sort { ){8^l0b
public void sort(int[] data); ~#) DJ
} ?t?!)#X
Vf O0 z5&
public static void swap(int[] data, int i, int j) { D>LdDhNn,`
int temp = data; X0P<ifIv
data = data[j]; ~#(bX]+A
data[j] = temp; mufF_e)
} Z\LW<**b
} (QqKttL: