[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; }{qZ[/JwqN
} k,E{C{^M
int i1=l; EZy)A$|
int i2=mid+1; l7259Ro~
for(int cur=l;cur<=r;cur++){ ]&xk30
if(i1==mid+1) otl0JHt*+
data[cur]=temp[i2++]; _jI,)sr4ic
else if(i2>r) XQs1eP'{
data[cur]=temp[i1++]; zRl3KjET
else if(temp[i1] data[cur]=temp[i1++]; '}JhzKNj
else k_qd|
data[cur]=temp[i2++]; qL&[K>2z
} EC6DW=
} DV+xg3\(>1
t?ZI".>
} +xSHL|:b
^aMg/.j
改进后的归并排序: R{3N&C
YX7L?=;.@
package org.rut.util.algorithm.support; *:YiimOY"
C'+YQ]u
import org.rut.util.algorithm.SortUtil; KRLQ #,9
WJndoB.f[2
/** }Qc@m9;bH
* @author treeroot +0%w ;'9z
* @since 2006-2-2 HU}7zK2
* @version 1.0 m )zUU
*/ -MO#]K3<
public class ImprovedMergeSort implements SortUtil.Sort { ./k/KSR
@ ZwvBH
private static final int THRESHOLD = 10; =wHVsdNCN
Zq|I,l0+E
/* t#/YN.@r
* (non-Javadoc) eV"h0_ox
* VT%NO'0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /W30~y
*/ ?)?Ng}
public void sort(int[] data) { ;|5F[
int[] temp=new int[data.length]; Ar|0b}=)>
mergeSort(data,temp,0,data.length-1); wj<6kG
} Eh;'S"{/?j
9ni1f{k
private void mergeSort(int[] data, int[] temp, int l, int r) { C'@i/+
int i, j, k; Ae^~Cz1qz
int mid = (l + r) / 2; #$+*;
if (l == r) } FlT%>Gw
return; p8H'{f\G
if ((mid - l) >= THRESHOLD) H8^(GUhyp
mergeSort(data, temp, l, mid); eRstD>r
else uk]$#TV*q>
insertSort(data, l, mid - l + 1); uaGk6S
if ((r - mid) > THRESHOLD) +I:Unp
mergeSort(data, temp, mid + 1, r); };bEU wGWf
else nQtWvT
insertSort(data, mid + 1, r - mid); uR4z&y
PbgP\JeX
for (i = l; i <= mid; i++) { "f2$w
temp = data; }J`w4P
} Nk 8B_{
for (j = 1; j <= r - mid; j++) { O67W&nz
temp[r - j + 1] = data[j + mid]; `?qF$g9u~
} n;Q7X>-f8`
int a = temp[l]; g i-$ZFzB
int b = temp[r]; 4*#18<u5
for (i = l, j = r, k = l; k <= r; k++) { H8zK$!
if (a < b) { V)-+Fd,=
data[k] = temp[i++]; V-2(?auZd
a = temp; |t&>5HM
} else { _LUhZlw
data[k] = temp[j--]; \0I_<
b = temp[j]; ,RI Gc US
} VUGmi]qd
} I-)+bV G
} 4Zddw0|2
m@F`!qY~Y\
/** ~&_z2|UXp
* @param data T_ <@..C
* @param l d-ZJL6-
* @param i @|m/djN5x
*/ oUr66a/[U
private void insertSort(int[] data, int start, int len) { f4b/NG|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $q{!5-e
} Y;Dp3v!
} x7w4[QYw
} xY8$I6
} Jbg/0|1
J26VnK
堆排序： A_ZY=jP
6f>{"'
package org.rut.util.algorithm.support; 9Cp-qA%t
|?xN\O^#}
import org.rut.util.algorithm.SortUtil; EIAc@$4
M,,bf[p$
/** SrJGTuXg
* @author treeroot (9GWbB?
* @since 2006-2-2 tBWrL{xLe
* @version 1.0 rmm0/+jY
*/ NiK4d{E&
public class HeapSort implements SortUtil.Sort{ E\EsWb
~.nmI&3
/* (non-Javadoc) ~2N"#b&J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _pG-qK
*/ t+G#{n
public void sort(int[] data) { A#<?4&
MaxHeap h=new MaxHeap(); -p-ZzgQ
h.init(data); cn3\kT*
for(int i=0;i h.remove(); 'n]w"]|
System.arraycopy(h.queue,1,data,0,data.length); jo@6?( *4
} F6|]4H.3Q
RVmh6m
private static class MaxHeap{ I)[DTCJ~
(@VMH !3
void init(int[] data){ vF+7V*<
this.queue=new int[data.length+1]; n\D&!y[]F
for(int i=0;i queue[++size]=data; vX"*4m>b?+
fixUp(size); ~<5!?6Yt
} "| g>'wM*
} @%uUiP0
@ioJ]$o7
private int size=0; E_wCN&`[
6l1jMm|= X
private int[] queue; g2ixx+`?|:
lU\[aNs
public int get() { ]^7@}Ce_
return queue[1]; h"Q8b}$^)
} wv1iSfW
5m 4P\y^a
public void remove() { =R|HV;9 h
SortUtil.swap(queue,1,size--); ]|ag
fixDown(1); ,PW'#U:
} i)#dWFDTv
file://fixdown P>D)7V9Hh
private void fixDown(int k) { mdDOvm:&
int j; Sy_G,+$\
while ((j = k << 1) <= size) { 'KL0@l
if (j < size %26amp;%26amp; queue[j] j++; v$v-2y'%
if (queue[k]>queue[j]) file://不用交换 -f^tE,-
break; 6l x>>J!H
SortUtil.swap(queue,j,k); eJ-xsH*8
k = j; p)-^;=<B3
} ,^< R{{{-A
} &h)yro
private void fixUp(int k) { SHgN~Um
while (k > 1) { ..5CC;B
int j = k >> 1; +GN(Ug'R
if (queue[j]>queue[k]) ]Q1yNtN
break; _6hQ %hv8
SortUtil.swap(queue,j,k); ;`{H!w[D
k = j; 'GWN~5
} 3(N$nsi
} .!3|&V'<
P3=G1=47U
} RSRS wkC
{\1?ZrCI&
} \?-<4Bc@
Hzz %3}E
SortUtil： yx[/|nZDC4
'<)n8{3Q5w
package org.rut.util.algorithm; X`K<>0.N
lrE5^;/s1
import org.rut.util.algorithm.support.BubbleSort; ? :%@vM
import org.rut.util.algorithm.support.HeapSort; Pmx-8w
import org.rut.util.algorithm.support.ImprovedMergeSort; I$G['`XX/
import org.rut.util.algorithm.support.ImprovedQuickSort; gz9j&W.
import org.rut.util.algorithm.support.InsertSort; JPHL#sKyz
import org.rut.util.algorithm.support.MergeSort; z&\a:fJ&
import org.rut.util.algorithm.support.QuickSort; iWkWR"ysy
import org.rut.util.algorithm.support.SelectionSort; |YWD8 +
import org.rut.util.algorithm.support.ShellSort; adcE'fA<_
EME|k{W
/** {S)6;|ua'
* @author treeroot O=t_yy
* @since 2006-2-2 Ll't>)
* @version 1.0 qInR1r<
*/ 9W5lSX#^;
public class SortUtil { CK@@HSm}l
public final static int INSERT = 1; WpP}stam/
public final static int BUBBLE = 2; V f&zL Sgr
public final static int SELECTION = 3; "HIRTE;&
public final static int SHELL = 4; sll\g
public final static int QUICK = 5; PFjL1=7I
public final static int IMPROVED_QUICK = 6; qe#tj/aZ
public final static int MERGE = 7; 2]*OQb#O6e
public final static int IMPROVED_MERGE = 8; M|h3Wt~7
public final static int HEAP = 9; !f[_+CD
TIDO@NwF
public static void sort(int[] data) { Wn2NMXK
sort(data, IMPROVED_QUICK); @Nx9)
} hn@08t G
private static String[] name={ U7F!Z( 9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 90rol~M&
}; =UQ3HQD
\}b%E'+_T
private static Sort[] impl=new Sort[]{ vvMT}-!
new InsertSort(), !Ai@$tl[S
new BubbleSort(), j,eo2HaL
new SelectionSort(), Zu[su>\
new ShellSort(), _V6ukd"B~
new QuickSort(), b8UO,fY q
new ImprovedQuickSort(), M6jy\<a
new MergeSort(), d7upz]K9g
new ImprovedMergeSort(), q|(HsLs
new HeapSort() tyFzSrfc
}; va@Lz&sAE%
k4J+J.|
public static String toString(int algorithm){ oG\Vxg*
return name[algorithm-1]; S=5o < 1
} lL3U8}vn
+r2-S~f3N
public static void sort(int[] data, int algorithm) { CA~-rv
impl[algorithm-1].sort(data); ?6U0PChy
} R-$!9mnr
_Fl9>C"u
public static interface Sort { U[MA)41
public void sort(int[] data); )ez9"# MH'
} 99QU3c<.
3=j"=-=
public static void swap(int[] data, int i, int j) { PJH&
int temp = data; rV#ch(
data = data[j]; /U9"wvg
data[j] = temp; :$c |
} ;.980+i1
} ;e*!S}C,