[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; +)*aS+
} N"/be
int i1=l; zK&J2P`
int i2=mid+1; R5'_il
for(int cur=l;cur<=r;cur++){ _<l9j;6
if(i1==mid+1) $ 7uxReFZR
data[cur]=temp[i2++]; ;%xG bg!lg
else if(i2>r) /n#t.XJY*
data[cur]=temp[i1++]; 4mF=A$Q_/
else if(temp[i1] data[cur]=temp[i1++]; a8r+G]Z
else ?+y# t?
data[cur]=temp[i2++]; dF0:'y
} 8^"P'XQ
} f{f|frs
^HNccr
} ?1lx8+
v*EErQML8b
改进后的归并排序: YX19QG%
u^&,~n@n7
package org.rut.util.algorithm.support; Xc7Qu?}
9NcC.}#-5
import org.rut.util.algorithm.SortUtil; C~:!WRCz
ekO*(vQ~
/** %~YQlN
* @author treeroot S:xG:[N@
* @since 2006-2-2 &?B\(?*
* @version 1.0 dG'5: ,n/
*/ aW#_"Y}v'
public class ImprovedMergeSort implements SortUtil.Sort { fO$~jxR.
VWcR@/3
private static final int THRESHOLD = 10; p4I6oS`/.
AC/82$
/* AJ-~F>gn
* (non-Javadoc) Vr%!rQ
* vCtag]H2@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ShRkL<
*/ >l|dLyiae
public void sort(int[] data) { '8bT9
int[] temp=new int[data.length]; gSu3\keF
mergeSort(data,temp,0,data.length-1); *`.4M)Ym~
} |p{FSS
"M5&&\uT
private void mergeSort(int[] data, int[] temp, int l, int r) { 'Z(4Wuwb
int i, j, k; gEQevy`T%c
int mid = (l + r) / 2; 7U{g'<
if (l == r) sy.U]QG
return; ij~023$DTt
if ((mid - l) >= THRESHOLD) 'HDbU#vD
mergeSort(data, temp, l, mid); )x*pkE**c
else 3xz{[5<p
insertSort(data, l, mid - l + 1); &`4v,l^Zi6
if ((r - mid) > THRESHOLD) obhq2sK
mergeSort(data, temp, mid + 1, r); ,zY!EHpx
else =1Mh%/y
insertSort(data, mid + 1, r - mid); SZQ4e
d>qxaX;
for (i = l; i <= mid; i++) { O<v9i4*
temp = data; ^zr]#`@G
} mf)o1O&B
for (j = 1; j <= r - mid; j++) { U4@W{P02
temp[r - j + 1] = data[j + mid]; \aG:l.IM0
} wFJ?u?b0Q
int a = temp[l]; L'Fy\K\
int b = temp[r]; /N&)r wc
for (i = l, j = r, k = l; k <= r; k++) { 13nXvYo'
if (a < b) { -dn\*n5
data[k] = temp[i++]; hup<U+p
a = temp; W+0VrH 0F
} else { Gp/yr
data[k] = temp[j--]; 8+<vumnw
b = temp[j]; T=QV =21qn
} ,@Izx
} Ih.6"ISK}
} C,xM)V^a
,??%["R
/** EO5k?k[*
* @param data v*7lJNN.
* @param l R)w|bpW
* @param i fscAG\>8
*/ /8SQmh$+e
private void insertSort(int[] data, int start, int len) { kG7q4jFwP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;ip"V 0`
} &&;ol}W
} LA.xLU3
} m18If
} +89s+4Jn
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堆排序： #~r+
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package org.rut.util.algorithm.support; *$Df)iI6
lFNf/j^Z
import org.rut.util.algorithm.SortUtil; c2z%|\q
/IS j0"/$
/** ;y7V-sf
* @author treeroot n#G I& U
* @since 2006-2-2 i~dW)7
* @version 1.0 ,f4mFL0~N
*/ yuvt<kz
public class HeapSort implements SortUtil.Sort{ wR?M2*ri
[y73 xF
/* (non-Javadoc) [UVxtMJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AFWcTz6#d
*/ Ok+zUA[Wu
public void sort(int[] data) { BHE((3
MaxHeap h=new MaxHeap(); N;A#3Ter
h.init(data); HN\Zrb
for(int i=0;i h.remove(); eiJO;%fl>l
System.arraycopy(h.queue,1,data,0,data.length); 6}.B2f9
} p1Q[c0NMK
@xJ qG"
private static class MaxHeap{ %:n1S]Vr
E/<[G?
void init(int[] data){ /vl]Oa&U
this.queue=new int[data.length+1]; sD$ \!7:b
for(int i=0;i queue[++size]=data; \#[W8k<Z
fixUp(size); 2sjP":
} 9x,Aqr$t
} w0Fi~:b
6u3DxFiTm
private int size=0; {4 !%'~
@.gT&Hq
private int[] queue; AC=cz!3iB
j=)Cyg3_%
public int get() { 2*Uwp;0
return queue[1]; ;^:9huN
} :<=!v5 SK
~ X8U@f
public void remove() { @5H1Ni5/o@
SortUtil.swap(queue,1,size--); Wxg,y{(`
fixDown(1); _=jc%@]1y
} =iRi9r'l
file://fixdown yUQ;tTI
private void fixDown(int k) { d3T|N\(DL
int j; UM7Ft"
while ((j = k << 1) <= size) { Z9ciS";L
if (j < size %26amp;%26amp; queue[j] j++; +~=>72/r
if (queue[k]>queue[j]) file://不用交换 C8cB Lsa[J
break; j3VM!/
SortUtil.swap(queue,j,k); ;h_"5/#
k = j; 2](R}
} #6_?7 (X
} )$yqJ6y5
private void fixUp(int k) { epm t
while (k > 1) { c6s*u%+},
int j = k >> 1; *9%<}z
if (queue[j]>queue[k]) AqvRzi(Y
break; bslv_OxJ
SortUtil.swap(queue,j,k); &Z5$ 5,[
k = j; =2bW"gs I
} <\?ySto
} SY["(vP%#
?)1h.K1}M
} "j3Yu4_ks
skdSK7 n
} $I-$X?
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SortUtil： 7i~::Z <
j*Q/vY!T
package org.rut.util.algorithm; P$2J`b[H$
N2;T\xx,
import org.rut.util.algorithm.support.BubbleSort; 4XQv
import org.rut.util.algorithm.support.HeapSort; P /wc9Yt
import org.rut.util.algorithm.support.ImprovedMergeSort; WW@/q`h
import org.rut.util.algorithm.support.ImprovedQuickSort; ~.AUy%$_g+
import org.rut.util.algorithm.support.InsertSort; u~Q0V J~
import org.rut.util.algorithm.support.MergeSort; W!I"rdo;V
import org.rut.util.algorithm.support.QuickSort; w@.E}%bwq
import org.rut.util.algorithm.support.SelectionSort; W$N_GR'4
import org.rut.util.algorithm.support.ShellSort; 2j H`
XYWGX;.=
/** J7emoD[
* @author treeroot dI-=0v-|
* @since 2006-2-2 *FR Eh@R
* @version 1.0 Mc~(S$FU$
*/ 1]fqt[*)
public class SortUtil { sL~TV([6/
public final static int INSERT = 1; %S$`cp
public final static int BUBBLE = 2; +f+x3OMX3
public final static int SELECTION = 3; =bZ>>-<
public final static int SHELL = 4; w@nN3U+
public final static int QUICK = 5; l:8gCi
public final static int IMPROVED_QUICK = 6; }Nl-3I.S^
public final static int MERGE = 7; '%V ;oJ"
public final static int IMPROVED_MERGE = 8; ;QW6Tgt11
public final static int HEAP = 9; C$aiOK-]+
!s?vj <
public static void sort(int[] data) { Cq u/(=
sort(data, IMPROVED_QUICK); sJ7r9O`x
} )1lR;fD
private static String[] name={ p{t2pfb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g!V;*[
}; jbn{5af
=!9+f
private static Sort[] impl=new Sort[]{ {_ww1'|A
new InsertSort(), mNKe,H0
new BubbleSort(), %K;,qS'N_
new SelectionSort(), K;_p>bI5
new ShellSort(), b,~4O~z
new QuickSort(), JnmJN1@I
new ImprovedQuickSort(), $oH?oD1
new MergeSort(), my[)/'
new ImprovedMergeSort(), =JOupw
new HeapSort() I^[R]Js
}; 7cr+a4T33
Z%N{Y x(
public static String toString(int algorithm){ @GBS-iT3
return name[algorithm-1]; Od^y&$|_%`
} yps7MM-r
V~&P<=8;Wl
public static void sort(int[] data, int algorithm) { "|]'\4UdzQ
impl[algorithm-1].sort(data); #v=hiL
} LP7t*}PK
XtNe) Ry
public static interface Sort { 8PDt 7 \
public void sort(int[] data); VZ}^1e
} 'vhgR2/
sn+i[
public static void swap(int[] data, int i, int j) { p;"pTGoWi
int temp = data; ;B^G<
data = data[j]; w-AF5%gX
data[j] = temp; tUGnD<P
} Gz+Bk5#{
} YnNB#x8|