[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; R{ a"Y$
} Q^ pmQ
int i1=l; B[V+ND'(
int i2=mid+1; kPVO?uO
for(int cur=l;cur<=r;cur++){ VY~yg*
if(i1==mid+1) +6';1Nb@
data[cur]=temp[i2++]; &K.?p2$X
else if(i2>r) (vb SM}P
data[cur]=temp[i1++]; }oL'8-y
else if(temp[i1] data[cur]=temp[i1++]; ~ ip,Nl
else S-k8jm
data[cur]=temp[i2++]; #a<Gxj
} VH+%a<v"
} bsB*533
:/Q
} \~fONBY
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改进后的归并排序: ^ q<v{_
:a$\/E=
package org.rut.util.algorithm.support; ~nrK>%
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import org.rut.util.algorithm.SortUtil; c&AygqN
BsEF'h'Owh
/** hS)'a^FV
* @author treeroot huJ&]"C
* @since 2006-2-2 jg.QRny^
* @version 1.0 Y8o)FVcyNy
*/ Qk,I^1w?7
public class ImprovedMergeSort implements SortUtil.Sort { ch0{+g&
t0IEaj75c
private static final int THRESHOLD = 10; Vl:^>jTki
D'J0wT#
/* CbwJd5tk
* (non-Javadoc) #wV8X`g
* ](&{:>RNJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O+]Ifm[
*/ |h;0H`
public void sort(int[] data) { Kac' ;1
int[] temp=new int[data.length]; rNB_W.
mergeSort(data,temp,0,data.length-1); B oC5E#;G
} W3 'q\+
`[W[H(AjQ
private void mergeSort(int[] data, int[] temp, int l, int r) { P*I}yPeb
int i, j, k; jV4\A
int mid = (l + r) / 2; >[_f3;P
if (l == r) LUqB&,a}
return; prTw'~(B
if ((mid - l) >= THRESHOLD) wS%Q<uK
mergeSort(data, temp, l, mid); {&\jW!&n
else ZuS0DPS`L
insertSort(data, l, mid - l + 1); #6+@M
if ((r - mid) > THRESHOLD) b/C`Jp
mergeSort(data, temp, mid + 1, r); ><gG8MH0'
else pKit~A,Q
insertSort(data, mid + 1, r - mid); bT^I"
5u*-L_
for (i = l; i <= mid; i++) { 'H \9:7
temp = data; 4:r!|PJn{G
} HbXPok
for (j = 1; j <= r - mid; j++) { |Z=^`J
temp[r - j + 1] = data[j + mid]; qI~xlW
} +f@U6Vv
int a = temp[l]; rEv$+pP
int b = temp[r]; *a#rM"6P
for (i = l, j = r, k = l; k <= r; k++) { 4cl\^yD
if (a < b) { 0@H|n^Md#
data[k] = temp[i++]; NhaI<J
a = temp; NiU2@zgl
} else { ]%?YZn<{
data[k] = temp[j--]; G>1eFBh }
b = temp[j]; FW/W%^
} STxKE %l
} 9J9)AV
} sB c (gr
Q\ U:~g3
/** iZaI_\"__
* @param data <gJU?$
* @param l ?kB2iU_f+
* @param i N4L|;?
*/ ^eR%N8Z
private void insertSort(int[] data, int start, int len) { h-Fn?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >(?9?
} p;tVn{u
} mR}6r2O2\Q
} 3td)'}
} ]dI2y=[!C
@8;W\L$~1
堆排序： oAPb*;}
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package org.rut.util.algorithm.support; 0},PJ$8x
[&&1j@LQ*
import org.rut.util.algorithm.SortUtil; ,'p2v)p^4
\H=&`?
/** !+L/Khw/C
* @author treeroot ]y,==1To
* @since 2006-2-2 rld67'KcE
* @version 1.0 `eIenA
*/ rmE"rf
public class HeapSort implements SortUtil.Sort{ @>E2?CV
2ioQb`=
/* (non-Javadoc) \Dd-Xn_b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) { T-'t/0e(
*/ Gcig*5
public void sort(int[] data) { BbgnqzU
MaxHeap h=new MaxHeap(); N1|$$9G+
h.init(data); ZE2$I^DY-
for(int i=0;i h.remove(); 0IfKJ*]M
System.arraycopy(h.queue,1,data,0,data.length); XI22+@d6
} ]K/DY Do-
],RdySN&
private static class MaxHeap{ }lfnnK#
dVsE^jsL
void init(int[] data){ $D}{]MN.
this.queue=new int[data.length+1]; Mi/&f
for(int i=0;i queue[++size]=data; =u+d_'P7-R
fixUp(size); 2UFv9
} )e a:Q?
} (Nx;0"5IX
49w=XJ
private int size=0; Ee3hG2d`
op6CA"w
private int[] queue; 1. rj'
Kwg4sr5"D
public int get() { s;64N'HH
return queue[1]; WV#%PJ
} <K8\n^i~c
wyQzM6:,yX
public void remove() { OujCb^Rm
SortUtil.swap(queue,1,size--); 'rr^2d]`ST
fixDown(1); il \$@Bn
} IaT$6\>
file://fixdown sfOHarww
private void fixDown(int k) { D;_ MPN[
int j; G=A,9@+c
while ((j = k << 1) <= size) { T`Mf]s)*
if (j < size %26amp;%26amp; queue[j] j++; hrhb!0
if (queue[k]>queue[j]) file://不用交换 [&nh5|f
break; tPGJ<30
SortUtil.swap(queue,j,k); vh*U]3@
k = j; -$WYj"
} RW}"2
} yRiP{$E
private void fixUp(int k) { k31I ysh
while (k > 1) { ^8@Iyh
int j = k >> 1; |'{zri|A"
if (queue[j]>queue[k]) aMvI?y {
break; hYM@?/(q
SortUtil.swap(queue,j,k); Xa[?^P
k = j; ;\\@q"n%<
} Vgyew9>E
} 6p?JAT5
,I_^IitN
} &bp=`=*
e`v`XSA[p
} @$2))g`
%o:2^5\W
SortUtil： q7-L53.x
~I799Xi
package org.rut.util.algorithm; ZG du|
>+ 4huRb
import org.rut.util.algorithm.support.BubbleSort; gF5a5T,
import org.rut.util.algorithm.support.HeapSort; Tp9-niW
import org.rut.util.algorithm.support.ImprovedMergeSort; |)K]U
import org.rut.util.algorithm.support.ImprovedQuickSort; h?FmBK'BAd
import org.rut.util.algorithm.support.InsertSort; L[20m(6?
import org.rut.util.algorithm.support.MergeSort; qq1-DG
import org.rut.util.algorithm.support.QuickSort; mBG=jI "xh
import org.rut.util.algorithm.support.SelectionSort; BYo/57&:
import org.rut.util.algorithm.support.ShellSort; nYa*b=[.
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/** _Jt 2YZdA
* @author treeroot ZU9c 5/J
* @since 2006-2-2 !k/Pv\j/R
* @version 1.0 sPb=82~z
*/ ?w+Ix~k
public class SortUtil { Zt&6Ua[Y}
public final static int INSERT = 1; @bnG:np
public final static int BUBBLE = 2; !DI{:I_h(
public final static int SELECTION = 3; z ly unJD(
public final static int SHELL = 4; \a=D
public final static int QUICK = 5; DVkB$2]
public final static int IMPROVED_QUICK = 6; v^_mFp-}\
public final static int MERGE = 7; {|yob4N
public final static int IMPROVED_MERGE = 8; fz3lV
public final static int HEAP = 9; ~35U]s@v
yin'vgQ
public static void sort(int[] data) { ?l$Nf@-
sort(data, IMPROVED_QUICK); 7zv1wb
} ]+m/;&0
private static String[] name={ m/@<c'i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9Y<#=C
}; C>[fB|^
A,)VM9M_l
private static Sort[] impl=new Sort[]{ >N?2""
new InsertSort(), _C+b]r/E
new BubbleSort(), XbZ*&
new SelectionSort(), 60)iw4<wf
new ShellSort(), hAjM1UQ,Y
new QuickSort(), d)"?mD:m/M
new ImprovedQuickSort(), l?q%?v8
new MergeSort(), %Jf<l&K.`
new ImprovedMergeSort(), |K^"3`SJ
new HeapSort() H-xFiF
}; [F[K^xYTlg
1<<kA:d
public static String toString(int algorithm){ \AC|?/sH
return name[algorithm-1]; brZ sAQ+k
} S#-tOjU*
F5 ]C{
public static void sort(int[] data, int algorithm) { wfP5@!I
impl[algorithm-1].sort(data); "sKa`WN}
} u^j {U}
MCP "GZK6W
public static interface Sort { `W-&0|%Ta
public void sort(int[] data); @YH+cG|
} nWvuaQ0}
@Kgl%[NmX
public static void swap(int[] data, int i, int j) { 7lo|dg80
int temp = data; LsM7hLy
data = data[j]; 6y5A"-
data[j] = temp; thqS*I'#g
} tWdhDt8$&
} Fbp{,V@F2