[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#-tOjU*
} )|I5j];L
int i1=l; wfP5@!I
int i2=mid+1; "sKa`WN}
for(int cur=l;cur<=r;cur++){ B=@ jWz"
if(i1==mid+1) bLnrbid
data[cur]=temp[i2++]; ;kJu$U
else if(i2>r) 2Gs$?}"a
data[cur]=temp[i1++]; 7lo|dg80
else if(temp[i1] data[cur]=temp[i1++]; QERU5|.wc
else F>X-w+b4r
data[cur]=temp[i2++]; 5&f{1M6l>
} P/ oXDI8
} tWdhDt8$&
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} w?,M}=vg
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改进后的归并排序: ZK'-U,Y.H7
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package org.rut.util.algorithm.support; kpI{KISQu
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import org.rut.util.algorithm.SortUtil; l6u&5[C
D)brPMS:o
/** m"9XT)N
* @author treeroot WpLZQ6wH
* @since 2006-2-2 u<n`x6gL
* @version 1.0 TbehR:B5g
*/ )!Bd6-
public class ImprovedMergeSort implements SortUtil.Sort { iHp\o=#
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private static final int THRESHOLD = 10; k5&bq2)I
)){xlFA}
/* sIl33kmv
* (non-Javadoc) vwr74A.g0
* {@u<3 s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ItX5JV)
*/ (#oycj^<
public void sort(int[] data) { 3},Zlu
int[] temp=new int[data.length]; I=Oy-
mergeSort(data,temp,0,data.length-1); ./p|?pu
} do-c1;M
Q8MS,7y/
private void mergeSort(int[] data, int[] temp, int l, int r) { m4[g6pNx~
int i, j, k; ?/JBt /b
int mid = (l + r) / 2; hGf-q?7
if (l == r) `E\imL
return; w#^U45y1v
if ((mid - l) >= THRESHOLD) <fdPLw;@e4
mergeSort(data, temp, l, mid); ?R5'#|EyX
else ?_`0G/xl
insertSort(data, l, mid - l + 1); 111D3
if ((r - mid) > THRESHOLD) $A}QY5`+~S
mergeSort(data, temp, mid + 1, r); !eJCM`cp
else ,5|d3dJS
insertSort(data, mid + 1, r - mid); #'hLb
F8+e,x
for (i = l; i <= mid; i++) { s^T+5E&}
temp = data; somfv$'B
} )uLr?$qe
for (j = 1; j <= r - mid; j++) { 9B+wYJp
temp[r - j + 1] = data[j + mid]; M)cGz$Q|
} /dDzZ%/@
int a = temp[l]; E-1"+p
int b = temp[r]; ^UA(HthY
for (i = l, j = r, k = l; k <= r; k++) { ]Fb0Az
if (a < b) { %TrF0{NR90
data[k] = temp[i++]; $gMCR b,
a = temp; %So]3;'
} else { XV'fW~j\
data[k] = temp[j--]; yW.COWL=)
b = temp[j]; L<(VG{)Z
} Zwe[_z!*D
} JLb6C52
} x:t<ZG&Xwg
Ewo*yY>
/** (3*UPZv
* @param data &2EBk=X
* @param l yoqa@V
* @param i ODf4+& u
*/ *(cU]NUH_
private void insertSort(int[] data, int start, int len) { YYRT.U'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $gp!w8h
} ^t'3rft
} &k T"oK
} F3ZxhkF
} J -Qh/d%]
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堆排序： ' eO/PnYW
wUi(3g|A
package org.rut.util.algorithm.support; sa1mC
v@G4G*x\
import org.rut.util.algorithm.SortUtil; | W#~F&{]
OYf{?-QD
/** ~_!ts{[E
* @author treeroot Xz;b,C&*t
* @since 2006-2-2 .F0]6#(
* @version 1.0 a%hGZCI
*/ >Csbjf6
public class HeapSort implements SortUtil.Sort{ ^Y^"'"
c!&Qj
/* (non-Javadoc) s0{ NsK>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !W1eUY
*/ Xy#VQ{!
public void sort(int[] data) { JZ`L%
MaxHeap h=new MaxHeap(); N_C_O$j
h.init(data); <?$kI>Ot
for(int i=0;i h.remove(); H?}wl%
System.arraycopy(h.queue,1,data,0,data.length); -Gsl[Rc0H;
} j"<Y!Y3
NMjnL&P`
private static class MaxHeap{ ~4 FDKUC
g=A$<k
void init(int[] data){ yBz>0I3
this.queue=new int[data.length+1]; $<e +r$1
for(int i=0;i queue[++size]=data; J(d2:V{h
fixUp(size); \iMyo
} E!aq?`-'!
} F(CRq`
W._G0b4}
private int size=0; =cfm=+
@)sc6 *lnW
private int[] queue; $ u2Cd4
_1JmjIH)M
public int get() { Wp*sPZ
return queue[1]; ) YSh D
} 5_G'68;OV
J0Four#MD
public void remove() { ,0T)Oc|HL/
SortUtil.swap(queue,1,size--); - 8syjKTg
fixDown(1); <q7s`,rG
} \7E`QY4
file://fixdown 0~xaUM`
private void fixDown(int k) { X}apxSd"
int j; umDtp\
while ((j = k << 1) <= size) { IYNMU\s
if (j < size %26amp;%26amp; queue[j] j++; MOV =n75
if (queue[k]>queue[j]) file://不用交换 |t\KsW
break; L_*L`!vQA"
SortUtil.swap(queue,j,k); `?SGXXC
k = j; w67xl
} 8Nvr93T,
} N^@ \tg=
private void fixUp(int k) { Y}/jR6hK
while (k > 1) { Q=.g1$LP
int j = k >> 1; * NMQ
if (queue[j]>queue[k]) aBCOGtf
break; q<}PM
SortUtil.swap(queue,j,k); d5, FM
k = j; 7l}~4dm2J
} #v qz{R~nM
} uAb 03Q
k E_ky)
} ry,}F@P&
sM9-0A
} b@-)Fy4d2
P`!Ak@N
SortUtil： OQ|,-
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package org.rut.util.algorithm; --/-D5
>H?uuzi
import org.rut.util.algorithm.support.BubbleSort; w$% BlqN
import org.rut.util.algorithm.support.HeapSort; }9Qf#&o
import org.rut.util.algorithm.support.ImprovedMergeSort; ^%zNa6BL
import org.rut.util.algorithm.support.ImprovedQuickSort; )b (X
import org.rut.util.algorithm.support.InsertSort; kt<@H11
import org.rut.util.algorithm.support.MergeSort; #! @m y
import org.rut.util.algorithm.support.QuickSort; <W|1<=z(
import org.rut.util.algorithm.support.SelectionSort; ,$i<@2/=m
import org.rut.util.algorithm.support.ShellSort; Qrz*Lvle h
X0x_+b? _
/** ]1Qi=2'
* @author treeroot ;5RIwD
* @since 2006-2-2 ;7 "Y?*{
* @version 1.0 oF&IC j0
*/ VLd=" ~
public class SortUtil { %jgg59
public final static int INSERT = 1; Z>HNe9pr
public final static int BUBBLE = 2; lDU#7\5.
public final static int SELECTION = 3; </hR!Sb]
public final static int SHELL = 4; O &\<FT5
public final static int QUICK = 5; jQIV2TY[
public final static int IMPROVED_QUICK = 6; [5pn@o
public final static int MERGE = 7; 4`G=q^GL,
public final static int IMPROVED_MERGE = 8; /^QFqM;
public final static int HEAP = 9; iXnx1w
F$C+R&V_
public static void sort(int[] data) { /~"AG l.
sort(data, IMPROVED_QUICK); '7=<#Blc
} 8"pA9Mr
private static String[] name={ "{6KZ!+0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U*xxrt/On/
}; ,"C&v~
^B6`e^<
private static Sort[] impl=new Sort[]{ `0[fLEm
new InsertSort(), SJF2k[da
new BubbleSort(), ~:s!].H
new SelectionSort(), Z0z)
new ShellSort(), L]a|vp
new QuickSort(), wISzT^RS
new ImprovedQuickSort(), YL!oF^XO
new MergeSort(), *q[^Q'jnN
new ImprovedMergeSort(), Y/!0Q6<[2Y
new HeapSort() tdb4?^.s
}; fIlIH
u4xA'X'~R
public static String toString(int algorithm){ Z_!9iA:X
return name[algorithm-1]; ^zkd{ov
} `O jvt-5}E
J b|mXNcL
public static void sort(int[] data, int algorithm) { X[Y#+z4
impl[algorithm-1].sort(data); `ITDTZ J
} }K+\8em
~JT lPU'
public static interface Sort { H|'$dO)W
public void sort(int[] data); _qk9o
} rcpvH}N:
hXBqz9
public static void swap(int[] data, int i, int j) { Zm5nLxM
int temp = data; Q,O]x#
data = data[j]; <6gU2@1
data[j] = temp; M`q#,Y?3^I
} =I{S;md
} uJ7,rq