[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; <X|"5/h
} 2x$\vL0
int i1=l; (tyo4Tz1
int i2=mid+1; (V{bfDu&h@
for(int cur=l;cur<=r;cur++){ xx!o]D-}
if(i1==mid+1) {< jLfL1
data[cur]=temp[i2++]; %J~8a_vO
else if(i2>r) A ;Z%-x
data[cur]=temp[i1++]; qZ`@Ro
else if(temp[i1] data[cur]=temp[i1++]; kj@#oLd%
else Qs#v/r
data[cur]=temp[i2++]; Z0b1E
} '(^p$=3|@D
} #mx;t3ja7
;[gv-H
} +Nc|cj
(;~[}"
改进后的归并排序: s8@fZ4
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package org.rut.util.algorithm.support; t8]u#bx"?
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import org.rut.util.algorithm.SortUtil; cO)GiWE
YDs/BF Z
/** cS QUK
* @author treeroot WDE_"Mm
* @since 2006-2-2 cl:*Q{(Cjk
* @version 1.0 AGK+~EjL@
*/ gTO%
public class ImprovedMergeSort implements SortUtil.Sort { -uy}]s5Qu
1PLKcU
private static final int THRESHOLD = 10; >=C)\Yfu)
Zu&trxnNf[
/* xhg{!w
* (non-Javadoc) d@,q6R}!MP
* JXUO?9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9dqD(S#C;"
*/ 2=F_<Jh|+
public void sort(int[] data) { -}4H'%Z(i
int[] temp=new int[data.length]; Yk?uxZ4)H
mergeSort(data,temp,0,data.length-1); e!eWwC9u
} '~3(s?B
mUcHsCszH
private void mergeSort(int[] data, int[] temp, int l, int r) { L?Wl#wP\;*
int i, j, k; -s:JD J*
int mid = (l + r) / 2; sDJ5'ul
if (l == r) <pK;D
return; gJvc<]W8!
if ((mid - l) >= THRESHOLD) 2kCJqyWy
mergeSort(data, temp, l, mid); 6K?+adKlc
else &/=xtO/Z{
insertSort(data, l, mid - l + 1); zx#d_SVi
if ((r - mid) > THRESHOLD) //H+S q66
mergeSort(data, temp, mid + 1, r); _or$^.='
else -?LSw
insertSort(data, mid + 1, r - mid); Z#7HuAF{]
+1h^9Y'
for (i = l; i <= mid; i++) { bTHJbpt*-
temp = data; GN=F-*2
} ?em)om
for (j = 1; j <= r - mid; j++) { <KHB/7
temp[r - j + 1] = data[j + mid]; O}IS{/^7
} bsqoR8
int a = temp[l]; Q6Jb]>g\H
int b = temp[r]; ~X`vRSrH
for (i = l, j = r, k = l; k <= r; k++) { f4!^0%l
if (a < b) { #'$CC<*vy
data[k] = temp[i++]; Pvbw>k;
a = temp; RoJ&dK
} else { ;#rtV;
data[k] = temp[j--]; `z+:Z>>
b = temp[j]; "thfd"-
} szmjp{g0
} Br-y`s~cP
} #cjB <APY
A4(^I u
/** %\:.rs^
* @param data = 2My-%i
* @param l {oz04KGsH
* @param i "GZhr[AW
*/ Ij#%Qu
private void insertSort(int[] data, int start, int len) { Pw$'TE}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wx<5*8zP
} LjxTRtB_
} 1<bSHn9
} z^Oiwzo
} Z [68ji]
J )@x:,o
堆排序： ~POe0!}
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package org.rut.util.algorithm.support; l9P~,Ec4''
ukG1<j7.
import org.rut.util.algorithm.SortUtil; 1AoBsEnd
M}38uxP
/** ^@{'! N
* @author treeroot ^0X86
* @since 2006-2-2 ] +Gi~
* @version 1.0 j q1qj9KZ
*/ ;9u6]%hQTX
public class HeapSort implements SortUtil.Sort{ W]6Y buP:
Yng9_w9Y
/* (non-Javadoc) b3Y9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L$7v;R3
*/ sjShm
public void sort(int[] data) { %9Ulgs8=
MaxHeap h=new MaxHeap(); 9J2%9,^
h.init(data); C_'Ug
for(int i=0;i h.remove(); 9W'#4
System.arraycopy(h.queue,1,data,0,data.length); .lTGFeJqZ4
} p(f)u]1`
3y 0`G8P'h
private static class MaxHeap{ "b -KVZ
o Q{gh$6*
void init(int[] data){ 9D8el}uHf
this.queue=new int[data.length+1]; ;y"E}h
for(int i=0;i queue[++size]=data; W&+UF'F2
fixUp(size); ly,d =
} eZP"M6
} kw=+"U
WdIr3
private int size=0; hnE@+(d=qJ
$7|0{Dw
private int[] queue; o`G'E&
{#Gr=iv~N
public int get() { `[o^w(l:5@
return queue[1]; 8a-[Q
} S~Nx;sB
C7qbofoV
public void remove() { of{wZU\J+9
SortUtil.swap(queue,1,size--); L & PhABZ
fixDown(1); LuQ=i`eXx
} /!7m@P|&D
file://fixdown B;7L:
private void fixDown(int k) { #C!8a
int j; #kma)_X
while ((j = k << 1) <= size) { m"+9[d_u
if (j < size %26amp;%26amp; queue[j] j++; xx9qi^
if (queue[k]>queue[j]) file://不用交换 9"MC<
break; E;-R<X5n
SortUtil.swap(queue,j,k); ^dqyX(
k = j; p|AIz3
} S'TF7u
} NGS/lKz
private void fixUp(int k) { %)q5hB
while (k > 1) { b/O~f8t
int j = k >> 1; ;Iv)J|*
if (queue[j]>queue[k]) %&z9^}Vd[
break; ,ci tzh
SortUtil.swap(queue,j,k); JrCm >0g
k = j; Fz>J7(Y.j
} dc%+f
} $!KV]]
T4\,b
} trgj]|?M
DSET!F;PG
} LD^V="d
% YU(,83(+
SortUtil： EJZl'CR
e ~*qi&,4
package org.rut.util.algorithm; N,Y<mX
*K m%Vl
import org.rut.util.algorithm.support.BubbleSort; 6 D~b9e
import org.rut.util.algorithm.support.HeapSort; 4[+n;OI
import org.rut.util.algorithm.support.ImprovedMergeSort; -?'u"*#1,
import org.rut.util.algorithm.support.ImprovedQuickSort; vco:6Ab$
import org.rut.util.algorithm.support.InsertSort; )v ['p
import org.rut.util.algorithm.support.MergeSort; uCUQxFp
import org.rut.util.algorithm.support.QuickSort; ?~u"w OH'
import org.rut.util.algorithm.support.SelectionSort; {!6!z,
import org.rut.util.algorithm.support.ShellSort; s*(Y<Ap7d
4MIL#1s
/** my*UN_]
* @author treeroot Mx$VAV^\
* @since 2006-2-2 9\Yj`,i5
* @version 1.0 :5h&f
*/ l'-iIbKX
public class SortUtil { ogjm6;
public final static int INSERT = 1; dos$d3B4
public final static int BUBBLE = 2; rD<@$KpP
public final static int SELECTION = 3; gD&%$&q
public final static int SHELL = 4; zy5@K)
public final static int QUICK = 5; \{NeDv{A
public final static int IMPROVED_QUICK = 6; >JC.qjA
public final static int MERGE = 7; [/5>)HK} C
public final static int IMPROVED_MERGE = 8; `iQyKZS/+
public final static int HEAP = 9; dsJ}C|N
$WTu7lVV[1
public static void sort(int[] data) { #2x\d
sort(data, IMPROVED_QUICK); ~Bj-n6QDE
} MLa]s* ; d
private static String[] name={ BflF*-s ^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bQ
}; (:E^} &A
Jq?ai8
private static Sort[] impl=new Sort[]{ Ep?a1&b
new InsertSort(), qj/ 66ak
new BubbleSort(), Ct"h.rD]
new SelectionSort(), L>pP3[~DV
new ShellSort(), ;~/
new QuickSort(), o+6Y/6Xp@
new ImprovedQuickSort(), 1VJE+3
new MergeSort(), V-J\!CHX
new ImprovedMergeSort(), B.{0,bW?
new HeapSort() .hT^7|Jz[
}; }$g5:k!
?^,GaZ^V
public static String toString(int algorithm){ <}i\fJX6
return name[algorithm-1]; ng<|lsZd
} <lv:mqV
^@L
public static void sort(int[] data, int algorithm) { y"2#bq
impl[algorithm-1].sort(data); 9$#2+G!J
} }Y<(1w
5_=&U-? H
public static interface Sort { -FE5sW
public void sort(int[] data); KDHR}`
} Ur5X~a\y
7J0PO}N
public static void swap(int[] data, int i, int j) { s g6
int temp = data; ,uDB]
data = data[j]; l^"gpO${K
data[j] = temp; !f_Kq$.{
} Q.vtU%T
} I /> .P