[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; 7bW!u*v-c
} b5,}w:
int i1=l; y5tAp
int i2=mid+1; &JQ@(w
for(int cur=l;cur<=r;cur++){ %<o$ J~l~
if(i1==mid+1) ezy5Jqk5%
data[cur]=temp[i2++]; ,f""|X5
else if(i2>r) [LEh
data[cur]=temp[i1++]; kIZdND&
else if(temp[i1] data[cur]=temp[i1++]; 2*;Y%NcP[
else 'C8=d(mR=m
data[cur]=temp[i2++]; #?d#s19s
} !`Yi{}1_
} 9Q5P7}%p
Nk~dfY<s
} VX@G}3Ck
qc4"0Ap'
改进后的归并排序: NqfDY
*"bp}3$^^
package org.rut.util.algorithm.support; bB:X<
= 8e8!8
import org.rut.util.algorithm.SortUtil; T7_ SO,X
vrldRn'*9
/** uTloj.
* @author treeroot aI#n+PW
* @since 2006-2-2 Xr6 !b:UX
* @version 1.0 U[ungvU1U
*/ .7^-*HT}
public class ImprovedMergeSort implements SortUtil.Sort { 1X}Tp\e
a9_KQ=&CI
private static final int THRESHOLD = 10; 8 =Lv7G%
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/* ,^Srd20
* (non-Javadoc) %H~gN9Vn#@
* #\;w::
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HPH{{p
*/ ; SM^
public void sort(int[] data) { 13az[
int[] temp=new int[data.length]; YD.^\E4o
mergeSort(data,temp,0,data.length-1); :|mkI#P.
} :pu{3-n.
^W05Z!}
private void mergeSort(int[] data, int[] temp, int l, int r) { ^<Tp-,J$EN
int i, j, k; s;M*5|-
int mid = (l + r) / 2; %4KJ&R (>[
if (l == r) *w,gi.Y3
return; T1di$8
if ((mid - l) >= THRESHOLD) EKw\a
mergeSort(data, temp, l, mid); ">&:(<
else ?i=!UN
insertSort(data, l, mid - l + 1); <vuX " 8
if ((r - mid) > THRESHOLD) 25[/'7_"
mergeSort(data, temp, mid + 1, r); ?a9k5@s
else qP'g}Pc
insertSort(data, mid + 1, r - mid); %$KO]
JU.%;e7
for (i = l; i <= mid; i++) { $NRb'
temp = data; #Kr.!uD
} E\N=p&g$
for (j = 1; j <= r - mid; j++) { (t['
temp[r - j + 1] = data[j + mid]; e>Y2q|S85
} ?0%TE\I8
int a = temp[l]; 0l@+xS;
int b = temp[r]; lM%fgyX
for (i = l, j = r, k = l; k <= r; k++) { -B(KQT,J
if (a < b) { >D#}B1(!
data[k] = temp[i++]; X1dG'PQ
a = temp; GP'Y!cl
} else { kweTK]mT
data[k] = temp[j--]; 6x{IY
b = temp[j]; :J-5Q]#
} ~B\:
} * XGBym
} e!Okc*,
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/** X5<.%@Z
* @param data 93DBZqN
* @param l ,RO(k4
* @param i .p}Kl$K]
*/ 1hS~!r'qqv
private void insertSort(int[] data, int start, int len) { x@}Fn:c!5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,O!aRvzap
} Z$XpoDbOy
} LS$82UB&
} h'KtG<+
} .U%"oD
KHN ,SB
堆排序： }O
l$9,
package org.rut.util.algorithm.support; 74(J7
1iDo$]TEK
import org.rut.util.algorithm.SortUtil; Af<>O$$6
W10fjMC}^
/** /D+$|kmW]
* @author treeroot fC|u
* @since 2006-2-2 ;P~S/j[ 8
* @version 1.0 Q>ytO'v1
*/ .Tv(1HAc2l
public class HeapSort implements SortUtil.Sort{ 9#6/c
+cH(nZ*f
/* (non-Javadoc) sdD[`#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) = h( n+y<
*/ Ti'kn{ Zv
public void sort(int[] data) { s+- aHn
MaxHeap h=new MaxHeap(); ?!oa15
h.init(data); 1?\Y,+
for(int i=0;i h.remove(); >cL2PN_y
System.arraycopy(h.queue,1,data,0,data.length); 7k|(5P;
} ,2bAKa
H/Q)zDP
private static class MaxHeap{ i@L2W>{P
/)TEx}wk
void init(int[] data){ }}1Q<puM
this.queue=new int[data.length+1]; E ET 2|*}
for(int i=0;i queue[++size]=data; V p{5Kxq
fixUp(size); Y_sVe
} ]'/]j
} T_T{c+,Zd$
-+_&#twU
private int size=0; .?RjH6W
*, K \A
private int[] queue; e`F|sz]k"H
&J:)*EjVl5
public int get() { {[*_HAy7
return queue[1]; Jx w<*
} m)}MkC-
cO&9(.d
public void remove() { [^~9wFNtd
SortUtil.swap(queue,1,size--); G1tp
fixDown(1); K/cK6Yr
} nUHVPuQ/'T
file://fixdown O%e.u>=4%
private void fixDown(int k) { C|LQYz-{
int j; 2z3A"HrlA
while ((j = k << 1) <= size) { f*Js= hvO
if (j < size %26amp;%26amp; queue[j] j++; _9r{W65s
if (queue[k]>queue[j]) file://不用交换 ^j}sS!p
break; {m:Rv&T
SortUtil.swap(queue,j,k); t@M] ec
k = j; gQ#T7
} 3~rc=e
} cU|jT8Q4H
private void fixUp(int k) { _xt(II
while (k > 1) { ^^uD33@_
int j = k >> 1; Uiw7Y\Im|
if (queue[j]>queue[k]) MGDv4cFE.
break; /GGu` f
SortUtil.swap(queue,j,k); YU(*kC8
k = j; o#/iR]3
} <t{AY^:r
} ?Nql7F4
FoCkTp+/
} %$| k3[4V
ZRGZ'+hw
} Dj(7'jT
Pc==]H(
SortUtil： :j4 [_9\
p5VSSvV\K
package org.rut.util.algorithm; u_=y,~s
kZ%W?#
import org.rut.util.algorithm.support.BubbleSort; ! -@!u
import org.rut.util.algorithm.support.HeapSort; Qe.kNdT+_
import org.rut.util.algorithm.support.ImprovedMergeSort; rF3]AW(
import org.rut.util.algorithm.support.ImprovedQuickSort; 1Z8oN3
import org.rut.util.algorithm.support.InsertSort; m]q!y3
import org.rut.util.algorithm.support.MergeSort; 6qpV53H
import org.rut.util.algorithm.support.QuickSort; d2yHfl]3
import org.rut.util.algorithm.support.SelectionSort; LfXr(2u
import org.rut.util.algorithm.support.ShellSort; N\p]+[6
5zna?(#}
/** J5( D7rp#
* @author treeroot ?<^AXLiKV
* @since 2006-2-2 ?I#hrv@
* @version 1.0 sbj(|1,ac
*/ bI.t<;
public class SortUtil { wCf~O'XLw
public final static int INSERT = 1; R"MRnr_4K
public final static int BUBBLE = 2; ^u}L;`L
public final static int SELECTION = 3; 1?*
public final static int SHELL = 4; K$K^=>I"o
public final static int QUICK = 5; wkqX^i7ls
public final static int IMPROVED_QUICK = 6; E{^XlY
public final static int MERGE = 7; C;QAT
public final static int IMPROVED_MERGE = 8; 'J&f%kx"
public final static int HEAP = 9; dz [!-M
@yXfBML?]
public static void sort(int[] data) { v:Tzv^
sort(data, IMPROVED_QUICK); Ch$*Gm19Z
} (/-hu[:
private static String[] name={ ,lA.C%4au~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AcI,N~~
}; \)K^=jM
@_:]J1jw7
private static Sort[] impl=new Sort[]{ Uw,2}yR
new InsertSort(), a22Mufl
new BubbleSort(), T,xPSN2A*
new SelectionSort(), \0lnxLA
new ShellSort(), 8:BIbmtt5
new QuickSort(), {u1V|q
new ImprovedQuickSort(), LK6; ?m
new MergeSort(), O=SkAsim
new ImprovedMergeSort(), M?&h~V1OI~
new HeapSort() lrfv+
}; ?(*t@ {k
<E\$3Ym9
public static String toString(int algorithm){ I;VuW
return name[algorithm-1]; [=B$5%A
} V=fEPM
AU-n&uX
public static void sort(int[] data, int algorithm) { lds-T
impl[algorithm-1].sort(data); xss`Y,5?
} %dQxJMwj
E0`Lg c
public static interface Sort { =K{\p`?
public void sort(int[] data); +)2s-A f-
} N3u((y/
Y0D}g3`
public static void swap(int[] data, int i, int j) { JQ4{` =,b
int temp = data; s'kDk2r
data = data[j]; Gmf B
data[j] = temp; .U T@p
} bdGIF'p%
} A^q[N