[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; hjx)D
} B6P|Z%E;D6
int i1=l; h&@R| N
int i2=mid+1; Y$8JM
for(int cur=l;cur<=r;cur++){ gIEl.
if(i1==mid+1) Px@/Q
data[cur]=temp[i2++]; [`=LTBt
else if(i2>r) Fig&&b a
data[cur]=temp[i1++]; &F$:Q:* *
else if(temp[i1] data[cur]=temp[i1++]; u'A#%}3
else ,.IEDF<&
data[cur]=temp[i2++]; 2 +5e0/_V
} ?/*~;fM
} +?D6T!)
hv$yV%.`
} ^t"iX9
qAkx<u
改进后的归并排序: Tsb{25`+
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package org.rut.util.algorithm.support; {Z;t ^:s#
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import org.rut.util.algorithm.SortUtil; gieJ}Bv
}A$WO{2
/** wRNroQ
* @author treeroot 3B0lb"e
* @since 2006-2-2 TB6m0qX(
* @version 1.0 E9!N>0
*/ HHk)ZfWRo
public class ImprovedMergeSort implements SortUtil.Sort { eBN)g^
?|;yVew
private static final int THRESHOLD = 10; _cDF{E+;
AF\T\mtvRm
/* %Tn#-
* (non-Javadoc) ;+"f
* Jc4L5*Xn/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZk0@C&:6
*/ JHn*->m
public void sort(int[] data) { i@"e,7mSG
int[] temp=new int[data.length]; Ac k}QzXO
mergeSort(data,temp,0,data.length-1); }peBR80tQ
} JwnAW}=
^W83ByP
private void mergeSort(int[] data, int[] temp, int l, int r) { 9$K;Raz%
int i, j, k; !v#xb3"/
int mid = (l + r) / 2; }71LLzG`/
if (l == r) .~lKBkS`!
return; wz8PtfZ
if ((mid - l) >= THRESHOLD) 6&v?)o
mergeSort(data, temp, l, mid); DLE8+NV8
else V% TH7@y
insertSort(data, l, mid - l + 1); l":c
if ((r - mid) > THRESHOLD) OIb
mergeSort(data, temp, mid + 1, r); }7<5hn E
else 01a-{&
insertSort(data, mid + 1, r - mid); d?idTcgs
TrVWv
for (i = l; i <= mid; i++) { 5@osnf?
temp = data; |BMV.Zi
} j{VGClb=T
for (j = 1; j <= r - mid; j++) { &Jc_Fc(M
temp[r - j + 1] = data[j + mid]; ^o?SM^
} rk2xKm^w
int a = temp[l]; +WJ(QZEhD
int b = temp[r]; sf}Dh
for (i = l, j = r, k = l; k <= r; k++) { 3{Nbp
if (a < b) { 2B~wHv
data[k] = temp[i++]; gv15t'y9
a = temp; |8_JY2 R
} else { =?0lA_ 0
data[k] = temp[j--]; w-B^ [<
b = temp[j]; j'%4{n
} ~iBgw&Y
} *TW=/+j
} G>qZxy`c
q=HHNjj8
/** ;E2>Ovv
* @param data &>WWzikB*
* @param l /h2b;"
* @param i 8cx=#Me
*/ txql 2
private void insertSort(int[] data, int start, int len) { -a Gcf]6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .k{ j]{k
} MWk:sBCqr
} W" "*ASi
} w JwX[\
} _:n b&B
!M<{E*
堆排序： ajl 2I/D
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package org.rut.util.algorithm.support; aMARZ)V
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import org.rut.util.algorithm.SortUtil; 57{oh")
W_O)~u8
/** 5y2? f
* @author treeroot uNbH\qd=
* @since 2006-2-2 Sgb*tE)T
* @version 1.0 u.pxz8
*/ (<t_Pru
public class HeapSort implements SortUtil.Sort{ 8?t"C_>*e
lor8@Qz
/* (non-Javadoc) NY$uq+Z>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I[MgIr^
*/ M/PFPJ >`
public void sort(int[] data) { h.rD}N\L
MaxHeap h=new MaxHeap(); D*5hrkV9
h.init(data); ~cAZB9Fa
for(int i=0;i h.remove(); Oh.ZPG=
System.arraycopy(h.queue,1,data,0,data.length); YIt9M,5/Q
} a^qNJ?R!
%ugHhS!
private static class MaxHeap{ _fFU#k:MU
HWns.[
void init(int[] data){ {eJt,[Y *
this.queue=new int[data.length+1]; 6Q4X6U:WB
for(int i=0;i queue[++size]=data; 3T\l]? z
fixUp(size); JN/UUfj
} wo2@hav
} Z!d7&T}
87!C@XlK_
private int size=0; 'PZ|:9FX!
1L7{p>;-dO
private int[] queue; @YvOoTyb
ivO/;)=t
public int get() { Rx07trfN
return queue[1]; dCYCHHHF
} 0oA{Jix
idc`p?XP
public void remove() { v7
SortUtil.swap(queue,1,size--); =-cwXo{Q.O
fixDown(1); {3a&1'a0g
} `Ycf]2.,$
file://fixdown M`,~ mU
private void fixDown(int k) { m8Vdb"0
int j; r'LVa6e"N
while ((j = k << 1) <= size) { Mk 0+D#
if (j < size %26amp;%26amp; queue[j] j++; Z0!5d<
if (queue[k]>queue[j]) file://不用交换 =rA~7+}
break; s1Ok|31|
SortUtil.swap(queue,j,k); V~DMtB7
k = j; SEwku}
} Kyt)2p
} F+ <Z<q
private void fixUp(int k) { }uHrto3M
while (k > 1) { {U]H;~3 ?
int j = k >> 1; oeSN9O
if (queue[j]>queue[k]) 'k;4j|<
break; `J<*9dq%
SortUtil.swap(queue,j,k); ,&PE6hn
k = j; 5hj
} f|A riM
} 4EI7W,y
CHd9l]Rbe
} (YBMsh
yw[#
} -\ZcOXpMx=
C$Lu]pIL*
SortUtil： .Ig+Dj{)
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package org.rut.util.algorithm; j1?j6s
eg<bi@C1|
import org.rut.util.algorithm.support.BubbleSort; a)Q!'$"'
import org.rut.util.algorithm.support.HeapSort; k 4/D8(OXw
import org.rut.util.algorithm.support.ImprovedMergeSort; m42T9wSsx
import org.rut.util.algorithm.support.ImprovedQuickSort; WH ?}~u9
import org.rut.util.algorithm.support.InsertSort; I jr\5FA[p
import org.rut.util.algorithm.support.MergeSort; 1"8yLvtn
import org.rut.util.algorithm.support.QuickSort; rrg96WD
import org.rut.util.algorithm.support.SelectionSort; Rtb :nJ8
import org.rut.util.algorithm.support.ShellSort; ]A FI\$qB\
4p%A8%/q
/** )m6M9eC
* @author treeroot V^y^ ;0I}[
* @since 2006-2-2 u$%t)2+$4
* @version 1.0 T +5X0 Nv
*/ A,su;Qh
public class SortUtil { NC&DFJo
public final static int INSERT = 1; yJuQ8+vgR}
public final static int BUBBLE = 2; ['z[
public final static int SELECTION = 3; ^@P1 JNe
public final static int SHELL = 4; PFUO8>!pA\
public final static int QUICK = 5; FYs)MO
public final static int IMPROVED_QUICK = 6; f>'Y(dJ'W
public final static int MERGE = 7; ]# t6Jwk
public final static int IMPROVED_MERGE = 8; U$oduY#
public final static int HEAP = 9; Sxjub&=
YV=QF J'
public static void sort(int[] data) { f}guv~K
sort(data, IMPROVED_QUICK); d0'JC*
} N@B9 @8h
private static String[] name={ Bq/:Nd[y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cg*H.f%Mr
}; Gm*X'[\DD
9nu3+.&P
private static Sort[] impl=new Sort[]{ XdH\OJ
new InsertSort(), s {^yj
new BubbleSort(), kyR*D1N&)
new SelectionSort(), zByT$P-
new ShellSort(), !lo/xQ<
new QuickSort(), \OlmF<~
new ImprovedQuickSort(), w[P4&?2:
new MergeSort(), h|X^dQb]
new ImprovedMergeSort(), t6v/sZ{F
new HeapSort() a>\vUv*
}; 3D?sL!W
HF|oBX$_
public static String toString(int algorithm){ oyo(1>
return name[algorithm-1]; -i-?.:
} h6dPO"
TLehdZ>^
public static void sort(int[] data, int algorithm) { 5nbEf9&
impl[algorithm-1].sort(data); /VG2.:
} f6$b s+oP
E*i#?u
public static interface Sort { YBh'EL}P
public void sort(int[] data); !!Z?[rj
} UA|u U5Q
^*fQX1h<
public static void swap(int[] data, int i, int j) { !?Wp+e6
int temp = data; vv26I
data = data[j]; }-~l!
data[j] = temp; EJ2yO@5O
} q+,Q<2J
} ! VjFW5'{