[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; Z,RzN5eN
} O,J>/
int i1=l; 8J=?5
int i2=mid+1; .Obw|V-
for(int cur=l;cur<=r;cur++){ udxFz2>_l$
if(i1==mid+1) J5di[nu
data[cur]=temp[i2++]; gi(H]|=a
else if(i2>r) NgADKrDU
data[cur]=temp[i1++]; $LKIT0
else if(temp[i1] data[cur]=temp[i1++]; }O/U;4Z
else $Wjww-mx
data[cur]=temp[i2++]; W,4QzcQR
} '= _/1F*q
} NiWa7/Hr
;'?l$ ._
} G,$PV e*
z{[xze-f
改进后的归并排序: W0(_~
O*eby*%h
package org.rut.util.algorithm.support; ~"!] 3C,L
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import org.rut.util.algorithm.SortUtil; ZRv*!n(Ug<
D!Q">6_"z
/** ;o^eC!:/%
* @author treeroot &+a9+y
* @since 2006-2-2 ,oN8HpGs
* @version 1.0 k'gh
*/ m`IC6*
public class ImprovedMergeSort implements SortUtil.Sort { U1@IX4^2`
,R'@%,/
private static final int THRESHOLD = 10; IC#>X5
@x9a?L.48
/* 0Oi,#]F
* (non-Javadoc) P7J>+cm
* $"`- ^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3!3xCO
*/ l]@&D#3ZM
public void sort(int[] data) { $k|g"9
int[] temp=new int[data.length]; G %N $C
mergeSort(data,temp,0,data.length-1); stG~AC
} 8;z6=.4xtg
fXXr+Mor
private void mergeSort(int[] data, int[] temp, int l, int r) { _]04lGx27
int i, j, k; Scp7X7{N
int mid = (l + r) / 2; /,1D)0
if (l == r) \X<bH&x:z
return; e`@ # *}A
if ((mid - l) >= THRESHOLD) T:t]"d}}
mergeSort(data, temp, l, mid); 4FEk5D
else ?f#y1m
insertSort(data, l, mid - l + 1); n?A6u\sQ
if ((r - mid) > THRESHOLD) +~'865{
mergeSort(data, temp, mid + 1, r); ICuF %
else P1zKsY,l$<
insertSort(data, mid + 1, r - mid); rW0kA1=E
3j,Q`+l/6d
for (i = l; i <= mid; i++) { A54N\x,
temp = data; Dakoqke
} V7GRA#|
for (j = 1; j <= r - mid; j++) { flk=>h|
temp[r - j + 1] = data[j + mid]; rJPb 3F
} ~oI1zNz/
int a = temp[l]; n/DP>U$I&
int b = temp[r]; N<f"]
for (i = l, j = r, k = l; k <= r; k++) { @WJgWJm
if (a < b) { /nyUG^5#{
data[k] = temp[i++]; 4S,`bnmB
a = temp; ^cV;~&|.Xk
} else { $>*3/H
data[k] = temp[j--]; if}-_E<F
b = temp[j]; wkP#Z"A0~
} (2$( ?-M
} >QA uEM
} )_1zRT|9
=2Bg9!zW>
/** JQ}$Aqk
* @param data dODt(J}%
* @param l L~_9_9c
* @param i Z= jr-)kK
*/ g$( V^
private void insertSort(int[] data, int start, int len) { [OHxonU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |\QgX%
} Rz(QC\(
} -9"['-WH,
} RD\
} km)zMoE{c{
zfI>qJ+Nqt
堆排序： 8'~[pMn`
UjaK&K+M?
package org.rut.util.algorithm.support; Dpvk\t
#6ri-n
import org.rut.util.algorithm.SortUtil; Uh7v@YMC
=.y~fA!
/** D<|qaHB=
* @author treeroot e"/;7:J5\
* @since 2006-2-2 &Ts-a$Z7?S
* @version 1.0 O_$m!5ug
*/ zV:pQRbt.
public class HeapSort implements SortUtil.Sort{ &$"i,~q^b
Xg<*@4RD8
/* (non-Javadoc) SeHagKA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9l}FU$
*/ t0z!DOODZP
public void sort(int[] data) { ~(x;5{
MaxHeap h=new MaxHeap(); [`p=(/I&L
h.init(data); MxWy*|J}
for(int i=0;i h.remove(); bSsh^Z
System.arraycopy(h.queue,1,data,0,data.length); *\=.<|HZ
} ~GTz:nC*
u@~JiiC%
private static class MaxHeap{ n9@ of
f~Fm4>\(
void init(int[] data){ x\F,SEj
this.queue=new int[data.length+1]; -`<kCW"
for(int i=0;i queue[++size]=data; K#*reJ}K
fixUp(size); bA= |_Wt
} (:._"jp]
} 0dhF&*h|L
ktj]:rCkF
private int size=0; D_/^+H]1
wSb1"a
private int[] queue; 3= xhoRX
/V8}eZ97
public int get() { \zieyE
return queue[1]; 8#(Q_
} V+Cwzc^j
/DQc&.jK
public void remove() { M%1}/!J3
SortUtil.swap(queue,1,size--); dYSr4pb
fixDown(1); \cC%!4
} I?"q/Ub~h
file://fixdown Vl%^H[]
private void fixDown(int k) { ._8KsuJG
int j; A]YVs
while ((j = k << 1) <= size) { \]P!.}nX#
if (j < size %26amp;%26amp; queue[j] j++; _Dym{!t
if (queue[k]>queue[j]) file://不用交换 A$#p%yb
break; 6fd+Q /
SortUtil.swap(queue,j,k); xZ|Y?R5m
k = j; GytXFL3`:
} 1U^A56CN
} {Z3dF)>
private void fixUp(int k) { |~'IM3Jw(Y
while (k > 1) { "`M?R;DH
int j = k >> 1; >tO`r.5u9
if (queue[j]>queue[k]) RY c!~Wh~Y
break; t]$P1*I
SortUtil.swap(queue,j,k); Eq$&qV-?(
k = j; w4W_iaU
} vz^<YZMu
} q-]`CW]n
Ggl~nxz
} ,Y|^^?'j Q
bx]N>k J
} .q[SI$qO/
\2ZPj)&-E
SortUtil： %CS@g.H=_
bHg,1y)UC
package org.rut.util.algorithm; 8>X d2X
dDm):Z*`b
import org.rut.util.algorithm.support.BubbleSort; )\6&12rj
import org.rut.util.algorithm.support.HeapSort; 66.5QD0
import org.rut.util.algorithm.support.ImprovedMergeSort; 0j30LXI_
import org.rut.util.algorithm.support.ImprovedQuickSort; T/^Hz4uA7
import org.rut.util.algorithm.support.InsertSort; Jrg2/ee,*
import org.rut.util.algorithm.support.MergeSort; )dY=0"4Z
import org.rut.util.algorithm.support.QuickSort; w"SoeU
import org.rut.util.algorithm.support.SelectionSort; _<a7CCg
import org.rut.util.algorithm.support.ShellSort; 9uRFnzJVx
BT)X8>ct
/** D[_|*9BC
* @author treeroot -8r
* @since 2006-2-2 ~><^'j[
* @version 1.0 {?J/c{=/P
*/ :4MB]v[K
public class SortUtil { A,%C,*)Cg
public final static int INSERT = 1; Hir Fl
public final static int BUBBLE = 2; D8>enum
public final static int SELECTION = 3; EI_
public final static int SHELL = 4; ,z;ky5Ct
public final static int QUICK = 5; .k 3'
public final static int IMPROVED_QUICK = 6; 1Ab>4UhD
public final static int MERGE = 7; C8vOE`U,J
public final static int IMPROVED_MERGE = 8; 4'-|UPhx
public final static int HEAP = 9; H^.IY_I`U*
9G{;?c
public static void sort(int[] data) { ]u4Hk?j~<
sort(data, IMPROVED_QUICK); K_2|_MLlZ
} EhO|~A*R
private static String[] name={ E<C&Cjz:H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U Z|HJ8_
}; dbOdq
FXzFHU/dP
private static Sort[] impl=new Sort[]{ :6zG7qES3
new InsertSort(), %{/%mJoX
new BubbleSort(), xdf82)
new SelectionSort(), NzU,va N
new ShellSort(), qf=1?=l291
new QuickSort(), /9zE^YcT
new ImprovedQuickSort(), V5GW:QT
new MergeSort(), Ma8_:7`>O
new ImprovedMergeSort(), rg{9UVj
new HeapSort() zN{K5<7o
}; \0mb 3Q'
~(pmLZ<GW}
public static String toString(int algorithm){ - /(s#D
return name[algorithm-1]; 'Hi: 2Wh
} W-.pmU e2
:$_6SQ<?
public static void sort(int[] data, int algorithm) { 7ULqo>j
impl[algorithm-1].sort(data); -K rxMi
} [Z~ 2
ithewup
public static interface Sort { LwhyE:1
public void sort(int[] data); )13dn]o=2
} DK=cVpN%s
BCe|is0
public static void swap(int[] data, int i, int j) { qNm$Fx
int temp = data; -jn WZ5.
data = data[j]; x5QaM.+=J
data[j] = temp; om |"S
} 4<cz--g
} \mw(cM#: