[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; ,o@~OTja*
} 27E9NO=
int i1=l; O0wCb
int i2=mid+1; ?t0zsq
for(int cur=l;cur<=r;cur++){ ;s\;78`0
if(i1==mid+1) -N7L#a
data[cur]=temp[i2++]; 3R%UPT0>
else if(i2>r) "G9'm
data[cur]=temp[i1++]; ) Zb`~w
else if(temp[i1] data[cur]=temp[i1++]; `o8{qU,*]N
else =6Sj}/
data[cur]=temp[i2++]; Wd` QpW
} CnSX
} Xvj=*wg\Y
f UF;SqT
} r ctSS:1
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改进后的归并排序: u2-@?yt
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package org.rut.util.algorithm.support; leES YSY:
ke9QT#~p!-
import org.rut.util.algorithm.SortUtil; Fb|e]?w
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/** x #tu
* @author treeroot V(2j*2R!
* @since 2006-2-2 p37zz4
* @version 1.0 ,]uX:h-EM
*/ MO~~=]Y'
public class ImprovedMergeSort implements SortUtil.Sort { ..]*Ao2
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private static final int THRESHOLD = 10; ?#*
v=*Bb3dt
/* /}nrF4S
* (non-Javadoc) _D>as\dP
* 88#qu.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hk@`N;dn
*/ wAu[pWD'6;
public void sort(int[] data) { xv$)u<Ve
int[] temp=new int[data.length]; JXL9Gge
mergeSort(data,temp,0,data.length-1); @Xve qUUU
} S0N2rU
b@wBR9s
private void mergeSort(int[] data, int[] temp, int l, int r) { aI={,\
int i, j, k; P^8^1-b
int mid = (l + r) / 2; Z\|u9DO
if (l == r) h eE'S/
return; WjY{rM,K
if ((mid - l) >= THRESHOLD) vr{'FMc
mergeSort(data, temp, l, mid); 5>ADw3z'
else 0Oc}rRH(C
insertSort(data, l, mid - l + 1); my\o P(e\
if ((r - mid) > THRESHOLD) :T7?
mergeSort(data, temp, mid + 1, r); H~[LJ5x
else `!nJS|
insertSort(data, mid + 1, r - mid); 9U|<q
m%oGzx+
for (i = l; i <= mid; i++) { 2#AeN6\@
temp = data; 7`blGzP_
} }iua] 4|
for (j = 1; j <= r - mid; j++) { 9u?)vR[@e
temp[r - j + 1] = data[j + mid]; }z%OnP
} (!ZQ
int a = temp[l]; Ig1lol:;
int b = temp[r]; <H5n>3#pH
for (i = l, j = r, k = l; k <= r; k++) { aFRTNu/r
if (a < b) { 9Qzjqq:"Li
data[k] = temp[i++]; y Y>-MoF/t
a = temp; 1 [Sv
} else { YVB% kKv{
data[k] = temp[j--]; (px*R~}
b = temp[j]; Sc&)~h}YF
} 1z~k1usRK
} /7k.r}6\R
} zBk_-'z
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/** FOCoiocPi
* @param data p!+L
* @param l "_K}rI6(t
* @param i m<FF$pTT
*/ ${hyNt
private void insertSort(int[] data, int start, int len) { R9tckRG#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |H ^w>mk
} !}>eo2$r^
} F2IC$:e M
} >vlQ|/C
} t|;%DA)fjw
j\2]M
堆排序： 44|deE3Z
2?GXkPF2;A
package org.rut.util.algorithm.support; bnijM/73
sS, zzx<
import org.rut.util.algorithm.SortUtil; C _8j:Z&
JAc@S20v\
/** [O=W>l
* @author treeroot "A%MVym."
* @since 2006-2-2 9;=q=O/
* @version 1.0 Ur^YG4(
*/ C/F@ ]_y
public class HeapSort implements SortUtil.Sort{ L)q`D2|'
Uh|TDuM
/* (non-Javadoc) ]{YN{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !L4dUMo
*/ Dba+z-3Nzy
public void sort(int[] data) { fO*)LPen.z
MaxHeap h=new MaxHeap(); y0,Ft/D
h.init(data); &oA~ Tx
for(int i=0;i h.remove(); "?$L'!bM@
System.arraycopy(h.queue,1,data,0,data.length); \WWG>OUh.U
} uu}'i\Q
vx'l>@]k
private static class MaxHeap{ );=Q] >
Q}=fVY
void init(int[] data){ F y b[{"
this.queue=new int[data.length+1]; xXORIlD
for(int i=0;i queue[++size]=data; iwUv`>l&
fixUp(size); PmHd9^C
} ]de\i=?|
} Ujf,6=M
/K f L+"^|
private int size=0; iBucT"d]
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private int[] queue; UL&} s_
-(!uC+BZX
public int get() { Kk7GZ
return queue[1]; R6 ;jY/*#
} L/~D<V
6_WmCtvF
public void remove() { Z%#^xCz;w>
SortUtil.swap(queue,1,size--); |7y6 pz
fixDown(1); [~COYjp
} GjEqU;XBi
file://fixdown G%;kGi`m
private void fixDown(int k) { IAYACmlN&
int j; ]a M-p@
while ((j = k << 1) <= size) { ((qGh>*
if (j < size %26amp;%26amp; queue[j] j++; vTdUuj3N
if (queue[k]>queue[j]) file://不用交换 sJOV2#r
break; B;V5x/
SortUtil.swap(queue,j,k); ~Po<(A}`f
k = j; 4h;4!I|
} n,CD
} !:3^ hb
private void fixUp(int k) { +,z)#
while (k > 1) { $%=G[/i'
int j = k >> 1; / $_M@>
if (queue[j]>queue[k]) tj[c#@[B
break; }w#F6
SortUtil.swap(queue,j,k); h(nj,X+
k = j; >zQOK-
} 88+ =F XG
} =5?.'XMk
`%Q&</X
} 6AAswz'$P
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} U9 bWU'
33 :@*
SortUtil： yplG18
D*QYKW=)
package org.rut.util.algorithm; KU]ok '
Ps3~{zH`
import org.rut.util.algorithm.support.BubbleSort; `Ug tvo
import org.rut.util.algorithm.support.HeapSort; $Zxt&a
import org.rut.util.algorithm.support.ImprovedMergeSort; t!jYu<P
import org.rut.util.algorithm.support.ImprovedQuickSort; "TNVD"RLY
import org.rut.util.algorithm.support.InsertSort; QXs8:;T
import org.rut.util.algorithm.support.MergeSort; z6I%wh
import org.rut.util.algorithm.support.QuickSort; d*2u}1Jo8
import org.rut.util.algorithm.support.SelectionSort; 0\Y1}C
import org.rut.util.algorithm.support.ShellSort; DHv2&zH
^^U%cuKg
/** pM9yOY
* @author treeroot 2e59Ez%k6
* @since 2006-2-2 ^&Q<tN7
* @version 1.0 E=]]b;u-n
*/ et` 0Je
public class SortUtil { QD$Gw-U-l=
public final static int INSERT = 1; FAw1o
public final static int BUBBLE = 2; hO \/
public final static int SELECTION = 3; dw9Tf^V
public final static int SHELL = 4; +P)ys#=
public final static int QUICK = 5; {~'H
public final static int IMPROVED_QUICK = 6; &iBNO,v
public final static int MERGE = 7; !zR)D|w&
public final static int IMPROVED_MERGE = 8; w#9_eq|3
public final static int HEAP = 9; n'M>xq_
w"~<h;
public static void sort(int[] data) { \J3/keL
sort(data, IMPROVED_QUICK); u%B&WwHG
} ;|HL+je;Z
private static String[] name={ Z7z]2v3}c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8I.VJ3Q
}; ,F9nDF@)
id?E)Jy
private static Sort[] impl=new Sort[]{ OhFW*v
new InsertSort(), "(f`U.
new BubbleSort(), oL-2qtv
new SelectionSort(), RgZOt[!.
new ShellSort(), Hhl-E:"H`
new QuickSort(), /8c&Axuv
new ImprovedQuickSort(), -{{[cTI
new MergeSort(), X#`dWNrN
new ImprovedMergeSort(), v+6e;xl8
new HeapSort() `*_CElpP"
}; )%F5t&lum
.3X Y&6
public static String toString(int algorithm){ z_&P?+"Df
return name[algorithm-1]; WbcS: !0
} 2hq\n<
fd1C{^c
public static void sort(int[] data, int algorithm) { (>7>3
impl[algorithm-1].sort(data); UQPU"F7.
} +~35G:&:
ue\t,*KYd
public static interface Sort { _ck[&Q
public void sort(int[] data); Zh'&-c_J
} {dzoEM[ 1s
zK;XFN#U^
public static void swap(int[] data, int i, int j) { fYX<d%?7
int temp = data; ppN} k)m
data = data[j]; \Y5W!.(%w
data[j] = temp; GLUUY0
} (MLhaux-
} 7lA:)a_!]