[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; rw*#ta O
} Z$h39hm?c
int i1=l; &^-quzlZ
int i2=mid+1; vF45tw
for(int cur=l;cur<=r;cur++){ 71GLqn?
if(i1==mid+1) >icK]W
data[cur]=temp[i2++]; G~Oj}rn
else if(i2>r) +*OY%;dQ7@
data[cur]=temp[i1++]; 4qw&G
else if(temp[i1] data[cur]=temp[i1++]; z1oikg:?4
else | ?Js)i
data[cur]=temp[i2++]; pq;)l(Hi
} B@wQ[
} Vab+58s5
<fY<.X
} EFl[u+ 1tx
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改进后的归并排序: L|DSEth
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package org.rut.util.algorithm.support; Q^qG=
,O=@I
import org.rut.util.algorithm.SortUtil; mUi|vq)`=D
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/** 0-dhGh?.
* @author treeroot oh{!u!L`]
* @since 2006-2-2 z_XI,u}
* @version 1.0 pf.T{/%
*/ G6X
public class ImprovedMergeSort implements SortUtil.Sort { h%kB>E~
G7lC'~}
private static final int THRESHOLD = 10; dOY+| P\
ye U4,Ko
/* 3mWd?!+m=
* (non-Javadoc) Xg#g`m%(M
* ~mUP!f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,wmPK;j
*/ `m5cU*@D
public void sort(int[] data) { htg+V-,
int[] temp=new int[data.length]; rn1FCJ<;H
mergeSort(data,temp,0,data.length-1); l7 D/]&
} ?9q{b\=l
Yyl2J#$!
private void mergeSort(int[] data, int[] temp, int l, int r) { Kb%j;y
int i, j, k; YW"?Fy
int mid = (l + r) / 2; 1 sCF -r
if (l == r) o?P(Fuf
return; "42u0rH0J
if ((mid - l) >= THRESHOLD) d>F=|dakL
mergeSort(data, temp, l, mid); ff"Clp
else zqAK|jbL
insertSort(data, l, mid - l + 1); whP>'9t.w
if ((r - mid) > THRESHOLD) (E)/' sEb
mergeSort(data, temp, mid + 1, r); Xmy(pV!PF
else ]4@z.1Mr
insertSort(data, mid + 1, r - mid); Dbr(Wg
yS/ovd
for (i = l; i <= mid; i++) { T8YqCT"EA<
temp = data; ,)+O.Lf7&.
} j#%*@]>Tg
for (j = 1; j <= r - mid; j++) { g#=^U`y
temp[r - j + 1] = data[j + mid]; R{.wAH(
} Ki-CJy
int a = temp[l]; 57+^T}/>
int b = temp[r]; ?,|_<'$4T
for (i = l, j = r, k = l; k <= r; k++) { 6X5m1+ Oi^
if (a < b) { De|@}@
data[k] = temp[i++]; <u44YvLBm
a = temp; C78d29
} else { ^sH1YE}0
data[k] = temp[j--]; ;D]TPBE
b = temp[j]; (JFa
} kYs2AzS{d
} hmkcWr`
} uXeBOLC
j^ZpBNL
/** rjU $*+
* @param data yB}y'5
* @param l X4i$,$C
* @param i N|q:wyS|
*/ A"eT@
private void insertSort(int[] data, int start, int len) { +XWXHt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L.!:nu]rV
} vE?qF9I{$0
} ?Z!itB~
} R|t.wawCo
} gzzPPd,hd
c#9 zw[y-L
堆排序： ^f!d8 V
cJ:BEe
package org.rut.util.algorithm.support; =KT7ZSTV
r3Z-mJ$:
import org.rut.util.algorithm.SortUtil; :[(X!eP
)2F:l0g
/** k` (_~/#
* @author treeroot @]*z!>1
* @since 2006-2-2 /]]\jj#^
* @version 1.0 1;L!g*!E
*/ @R}L 4
public class HeapSort implements SortUtil.Sort{ $yaE!.Kc
x)#k$QU
/* (non-Javadoc) T:cSv @G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U$VTk
*/ ;?inf`t
public void sort(int[] data) { |c8p{)
MaxHeap h=new MaxHeap(); jopC\Z
h.init(data); 0; V{yh
for(int i=0;i h.remove(); BY,%+>bc)
System.arraycopy(h.queue,1,data,0,data.length); 1[3"|
} vR1%&(f{
zZ-e2)1v
private static class MaxHeap{ -lSm:O@'
9'//_ A,
void init(int[] data){ ZWf{!L,@Z
this.queue=new int[data.length+1]; .(9IAAwKn
for(int i=0;i queue[++size]=data; )IZ$R*Y{
fixUp(size); #FaR?L![Y
} !;CY @=
} -oF4mi8S
tGmyTBgx
private int size=0; N.eSf
7SAu">lIl
private int[] queue; i8HSYA
~,':PUkiV
public int get() { %I Y-0\
return queue[1]; 8Qu].nKe
} [zf9UUc~
f.+e
public void remove() { l`$f@'k
SortUtil.swap(queue,1,size--); {!oO>t
fixDown(1); Y]8l]l 1
} {2Gp+&
file://fixdown +~FH'DsT
private void fixDown(int k) { _,Fwt
int j; F>*w)6 4~
while ((j = k << 1) <= size) { <\zb*e&vr
if (j < size %26amp;%26amp; queue[j] j++; (:T~*7/"
if (queue[k]>queue[j]) file://不用交换 Kq!n`@
break; DU1,i&(
SortUtil.swap(queue,j,k); !JYDg
k = j; [U3z*m>e;
} qd{|"(9B
} y ImriCT
private void fixUp(int k) { sMO3eNLn
while (k > 1) { _\o +9X!
int j = k >> 1; @Gn9x(?J
if (queue[j]>queue[k]) 9MM4C
break; yMz@-B
SortUtil.swap(queue,j,k); }3[ [ONA
k = j; U?|s/U
} (Z`Y
} N;[w`d'#
+}9%Duim
} Nt/*VYUn
2? !b!
} 7^Onq0ym T
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SortUtil： ]Dx?HBM"DC
u4+VG5.rhT
package org.rut.util.algorithm; cVulJ6
^O892-R
import org.rut.util.algorithm.support.BubbleSort; 2N)vEUyDV
import org.rut.util.algorithm.support.HeapSort; k7W8$8v
import org.rut.util.algorithm.support.ImprovedMergeSort; 8%nTDSp&t
import org.rut.util.algorithm.support.ImprovedQuickSort; g>f(5
import org.rut.util.algorithm.support.InsertSort; ;utjW1y
import org.rut.util.algorithm.support.MergeSort; (\R"v^
import org.rut.util.algorithm.support.QuickSort; c yN_Sg
import org.rut.util.algorithm.support.SelectionSort; 5jjJQ'
import org.rut.util.algorithm.support.ShellSort; >)S a#w;
]Uxx_1$,
/** 23+GX&Rp
* @author treeroot b|fq63ar;
* @since 2006-2-2 XTeU2I
* @version 1.0 I|R9@
*/ i1G}mYz_
public class SortUtil { (4c<0<"$
public final static int INSERT = 1; UJ6WrO5#kB
public final static int BUBBLE = 2; NWNgh/9?
public final static int SELECTION = 3; i!,>3
public final static int SHELL = 4; ![Jxh,f
public final static int QUICK = 5; *2@q=R-1
public final static int IMPROVED_QUICK = 6; C8G['aQ
public final static int MERGE = 7; =~HX/]zF
public final static int IMPROVED_MERGE = 8; [;.zl1S<
public final static int HEAP = 9; z1]RwbA?1
rqa;MPl
public static void sort(int[] data) { !EKF^n6
sort(data, IMPROVED_QUICK); :wn![<`3q
} e dD(s5
private static String[] name={ TS1k'<c?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fYCAwS{
}; +p43d:[
Vx#xq#wK
private static Sort[] impl=new Sort[]{ H-UMsT=g]
new InsertSort(), (iS94}-)
new BubbleSort(), z-,U(0 .
new SelectionSort(), _N<qrH^;
new ShellSort(), V25u'.'v
new QuickSort(), 7z+NR&'M$
new ImprovedQuickSort(), }Rt<^oya*
new MergeSort(), s}HTxY;
new ImprovedMergeSort(), +w}5-8mH&>
new HeapSort() % mIq,
}; beIEy(rA
].1R~7b
public static String toString(int algorithm){ ^|gN?:fA}
return name[algorithm-1]; =CqLZ$10
} Pp.X Du
HWs?,AJNxB
public static void sort(int[] data, int algorithm) { (,<?Pg7v:f
impl[algorithm-1].sort(data); %OzxR9
} 8"S0E(,mu
Wxg|jP$~
public static interface Sort { a{)"KAP
public void sort(int[] data); ]7br*t^zv
} #~ >0Dr
?.~@lE
public static void swap(int[] data, int i, int j) { 3[Z?`X
int temp = data; / ?Q@Pn
data = data[j]; b8`O7@ar
data[j] = temp; %F{@DN`
} f:BW{Cij;y
} (2a~gQGD