[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; zs(P2$
} o}&{Y2!x
int i1=l; m-qu<4A/U|
int i2=mid+1; B"sB0NuT/$
for(int cur=l;cur<=r;cur++){ Pl. y9g~
if(i1==mid+1) qSDn0^y
data[cur]=temp[i2++]; <PFF\NE9
else if(i2>r) N%,zME
data[cur]=temp[i1++]; ~_hA{$
else if(temp[i1] data[cur]=temp[i1++]; 8(Q|[
else A^E 6)A=
data[cur]=temp[i2++]; r#A*{4wz
} 3-=AmRxW't
} ZC%;5O`
o!ZG@k?#
} ]HaX.Z<
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改进后的归并排序: Y_}_)nE@m
G!`PP
package org.rut.util.algorithm.support; 0x,**6
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import org.rut.util.algorithm.SortUtil; C;5`G *e
-%0pYB
/** gAh#H ?MM
* @author treeroot {{Qbu}/@
* @since 2006-2-2 `T+w5ONn
* @version 1.0 qw*) R#=
*/ ?yxQs=&-q~
public class ImprovedMergeSort implements SortUtil.Sort { )@p?4XsT4J
.R@s6}C`}=
private static final int THRESHOLD = 10; aZ|?i }
em95ccs'-
/* =W;e9 6#
* (non-Javadoc) ubZJUm
* bEB2q\|Je
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ie11syhV"
*/ @U4hq7xzV2
public void sort(int[] data) { l[]cUE
int[] temp=new int[data.length]; %-]a[qf3
mergeSort(data,temp,0,data.length-1); +?W4ac1
} +0 }_X
tUuARo7#
private void mergeSort(int[] data, int[] temp, int l, int r) { '=O1n H<
int i, j, k; 8{]nS8i
int mid = (l + r) / 2; @ze2'56F}
if (l == r) Q lA?dXQ
return; 5HsF#
if ((mid - l) >= THRESHOLD) J>k 6`gw
mergeSort(data, temp, l, mid); b\KbF/T
else FrUqfTi+W
insertSort(data, l, mid - l + 1); /\_n5XI1
if ((r - mid) > THRESHOLD) +I-BqA9
mergeSort(data, temp, mid + 1, r); h1"|$
else 1hlU 6=Y
insertSort(data, mid + 1, r - mid); MRw4?HqB
Y+o\?|q-E
for (i = l; i <= mid; i++) { $Mj\ 3
temp = data; UM#.`
} {NQCe0S+p
for (j = 1; j <= r - mid; j++) { *7-rm
temp[r - j + 1] = data[j + mid]; ' tHa5`
} VM:|I~gJ
int a = temp[l]; }JWkV1
int b = temp[r]; o$Ylqb#
for (i = l, j = r, k = l; k <= r; k++) { 9pPLOXr ,
if (a < b) { ;c)( 'k<
data[k] = temp[i++]; P;@j
a = temp; _si5z
} else { @tPr\F
data[k] = temp[j--]; c{dabzLy
b = temp[j]; _;U%`/T b
} Qclq^|O0
} Y8^WuN$
} j#2EQ
u]7wd3(
/** a??8)=0|}
* @param data AC'_#nPL#
* @param l ^a`3)WBv8
* @param i dHTx^1
*/ -Ci&h
private void insertSort(int[] data, int start, int len) { f>$RR_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fN&uat7
} ~bm'i%$k
} TTFs|T6`q
} ~".@;Q
} ^H7xFd|>
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堆排序： 7)Vbp--b#
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package org.rut.util.algorithm.support; i721(1
me{u~9&
import org.rut.util.algorithm.SortUtil; R|'W#"{@
Y)]C.V,~
/** :\qapFV
* @author treeroot \o/eF&
* @since 2006-2-2 M2w'cdHk
* @version 1.0 9&uf
*/ 09anQHa
public class HeapSort implements SortUtil.Sort{ "g#%d
v*qbzW`
/* (non-Javadoc) -aVC`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZZZ9C#hK^9
*/ b=xn(HE8|
public void sort(int[] data) { $,]U~7S
MaxHeap h=new MaxHeap(); ~Gz9pBv1
h.init(data); X[r0$yuE
for(int i=0;i h.remove(); ZAU#^bEQB
System.arraycopy(h.queue,1,data,0,data.length); K0_gMi+bR
} #=S^i[K/
knYp"<qj
private static class MaxHeap{ CYQ)'v
d)bsyZ;U
void init(int[] data){ UWqD)6
this.queue=new int[data.length+1]; W[*xr{0V
for(int i=0;i queue[++size]=data; >(ip-R
fixUp(size); jq*`| m;Q
} Y8]@y0(
} ~gff{Nzk
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private int size=0; 7+hF1eoI
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private int[] queue; -5 PVWL\
>@Ht*h{~
public int get() { W"_<SYVJ
return queue[1]; OVDuF&0
} @WS77d~S
4Ex&AR8
public void remove() { :,aY|2si
SortUtil.swap(queue,1,size--); th[v"qD9G
fixDown(1); +sjzT[ Dn
} MkoK(m{7
file://fixdown dB[4NT
private void fixDown(int k) { 2{63:f1c`'
int j; >h;]rMD!|
while ((j = k << 1) <= size) { c_*w<vJ-'
if (j < size %26amp;%26amp; queue[j] j++; aMhVO(+FW
if (queue[k]>queue[j]) file://不用交换 J'|=J
break; jb&MC2
SortUtil.swap(queue,j,k); y< *-&
k = j; IJGw<cB]+
} M=uT8JB
} gtu<#h(
private void fixUp(int k) { 4/`;(*]Fv
while (k > 1) { Z>g>OPu
int j = k >> 1; rx2'].
if (queue[j]>queue[k]) IoLi7NKw
break; 8R3{YJ6@T
SortUtil.swap(queue,j,k); xt?-X%oY8
k = j; .6C/,rQ?c
} 3;BIwb_
} =;uMrb4
7\2I>W
} )8W! |
&=kv69v
} f|q/2}Bqb
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SortUtil： +:;ddV
bp:`m>4<
package org.rut.util.algorithm; Mww^
. &j+&
import org.rut.util.algorithm.support.BubbleSort; )&j`5sSXcr
import org.rut.util.algorithm.support.HeapSort; =eQB-Xe8Y
import org.rut.util.algorithm.support.ImprovedMergeSort; N:| :L:<1
import org.rut.util.algorithm.support.ImprovedQuickSort; ~h3G}EH
import org.rut.util.algorithm.support.InsertSort; T{C;bf:Q
import org.rut.util.algorithm.support.MergeSort; 3Vc}Q'&Y
import org.rut.util.algorithm.support.QuickSort; bKCE;Wu:G
import org.rut.util.algorithm.support.SelectionSort; -[-oz0`Sl{
import org.rut.util.algorithm.support.ShellSort; nTr%S&<+"
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/** F1@Po1VTD
* @author treeroot kx;X:I(5&P
* @since 2006-2-2 3?*dv14
* @version 1.0 2 3PRb<q
*/ -|m3=#
public class SortUtil { S"h;u=5it
public final static int INSERT = 1; r$={_M$
public final static int BUBBLE = 2; JFm@jc
public final static int SELECTION = 3; c}qpmWF
public final static int SHELL = 4; ZDFq=)0C
public final static int QUICK = 5; CXuD%H]tx
public final static int IMPROVED_QUICK = 6; B&a{,.m&q6
public final static int MERGE = 7; FFcCoPX_
public final static int IMPROVED_MERGE = 8; Z2$_9.
public final static int HEAP = 9; `;6M|5G
?CQE6ch
public static void sort(int[] data) { _f%s]
sort(data, IMPROVED_QUICK); CwX?%$S
} G)?*BH
private static String[] name={ J.1c,@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R xITMt
}; \yJ 4+vo2Q
DPzW,aIgv
private static Sort[] impl=new Sort[]{ 4@-tT;$
new InsertSort(), rc8HZ
new BubbleSort(), @ar%`+_
new SelectionSort(), \ =hg^j
new ShellSort(), ES+CAwqf
new QuickSort(), pKc!sdC
new ImprovedQuickSort(), _'!?fA
new MergeSort(), kuH%aM<R
new ImprovedMergeSort(), QAV6{QShj
new HeapSort() 2O=$[b3
}; jV sH
]AY 4bm
public static String toString(int algorithm){ Ww-x+U\l
return name[algorithm-1]; HqWWWCWal
} Zmyq6.1q~
kS-BB[T
public static void sort(int[] data, int algorithm) { I_ZJnu<
impl[algorithm-1].sort(data); w"9h_;'C_
} / 3N2?zS{
{S=<(A@
public static interface Sort { uQO5GDuK>
public void sort(int[] data); m0bxVV^DK!
} r*`e%`HU
@GKDSS4jv
public static void swap(int[] data, int i, int j) { oWY3dc
int temp = data; .jQx2O
data = data[j]; lm4A%4-db
data[j] = temp; 'r!!W0-K
} W/2y;@
} $\P/ %eP