[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; nRvV+F0#
} ,^/;!ErR$
int i1=l; xi^_C!*J
int i2=mid+1; Mv_4*xVc
for(int cur=l;cur<=r;cur++){ O*CKyW_$t
if(i1==mid+1) u4%-e)$X
data[cur]=temp[i2++]; qr:[y
else if(i2>r) V /|@
data[cur]=temp[i1++]; !r$/-8b
else if(temp[i1] data[cur]=temp[i1++]; I\":L
else #;+GNF}0mG
data[cur]=temp[i2++]; =r`>tWs
} o)w'w34FCT
} ?=aQG0
U<Ag=vsZE
} ee6Zm+.B
%h^; "|Z
改进后的归并排序: 7&2xUcsz)
M>-x\[n+
package org.rut.util.algorithm.support; d^4!=^HN
"@.hz@>
import org.rut.util.algorithm.SortUtil; (T,ST3{*k
q^EG'\<^
/** I/t2c=f
* @author treeroot l{6fR(d ?
* @since 2006-2-2 -K PbA`j+
* @version 1.0 lRn>/7sg$
*/ &!_>J0
public class ImprovedMergeSort implements SortUtil.Sort { MK,#"Ty}zK
FK>8(M/
private static final int THRESHOLD = 10; H&l/o
c.r]w
/* E<Efxb'p
* (non-Javadoc) -:Yx1Y3 [
* cJGU~\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _>0I9.[5
*/ p v%`aQ]o{
public void sort(int[] data) { 6ID@0
int[] temp=new int[data.length]; kect)=T(
mergeSort(data,temp,0,data.length-1); >E6w,Ab
} sBt,y_LW
G,3.'S,7
private void mergeSort(int[] data, int[] temp, int l, int r) { xbsp[0I,
int i, j, k; 274F+X
int mid = (l + r) / 2; s: pmB\
if (l == r) W:'H&`0
return; &( aw
if ((mid - l) >= THRESHOLD) M*$#j|
mergeSort(data, temp, l, mid); J4"?D9T3G
else 0M-=3T
insertSort(data, l, mid - l + 1); =~15q=XY0
if ((r - mid) > THRESHOLD) @T)kqT
mergeSort(data, temp, mid + 1, r); "w7wd5h
else #-W a3P
insertSort(data, mid + 1, r - mid); wO.T"x%X
)G a5c
for (i = l; i <= mid; i++) { [3o^06V8j
temp = data; k nTCX
} n.F^9j+V
for (j = 1; j <= r - mid; j++) { n%X5TJE
temp[r - j + 1] = data[j + mid]; > &tmdE
} =jz [}5
int a = temp[l]; UXgeL2`;
int b = temp[r]; %0&59q]LM
for (i = l, j = r, k = l; k <= r; k++) { yI$KBx/]n
if (a < b) { E?v:7p<
data[k] = temp[i++]; ^Q,-4\ec
a = temp; dT?mMTKn+
} else { t.X8c/,;g
data[k] = temp[j--]; I'[gGK4F
b = temp[j]; &65I 6
} mH6\8I
} S3Dmc\f
} 8GlRO4yd
7fE U5@
/** T]oVNy
* @param data Yc^;?n`x
* @param l ]Ub"NLYV
* @param i f0M5^
*/ 0fE?(0pBj
private void insertSort(int[] data, int start, int len) { xlIVLv6dO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NWue;u^
} (! a;}V<7
} =W[M=_0u
} B}fd#dr
} dC>[[_
^i[bo3
堆排序： yByxy-~
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package org.rut.util.algorithm.support; &[b(Lx|i
}y>/#]X
import org.rut.util.algorithm.SortUtil; -J":'xCP!
w5<&b1:
/** dt5`UBvUg
* @author treeroot -[}AhNYK
* @since 2006-2-2 ech1{v\B|
* @version 1.0 y?'Z'
*/ p}]K0F!
public class HeapSort implements SortUtil.Sort{ 1EMrXnv,
T&ib]LmR
/* (non-Javadoc) tS3!cO\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +!/pzoWpE
*/ tq=7HM
public void sort(int[] data) { |-9##0H
MaxHeap h=new MaxHeap(); -&h<t/U
h.init(data); M~U>"kX
for(int i=0;i h.remove(); 7*eIs2aY
System.arraycopy(h.queue,1,data,0,data.length); II]-mb
} m$`4.>J
7V%b!R}
private static class MaxHeap{ MjW{JR)I
;"2(e7ir
void init(int[] data){ \SooIEl@
this.queue=new int[data.length+1]; %Vb~}sT:
for(int i=0;i queue[++size]=data; J9&#);(
fixUp(size); :DJLkMP
} zB8J|uG
} ^f] 9^U{
Wb#ON|.2
private int size=0; OzV|z/R2'
$r1{Nh
private int[] queue; }F-,PSH Ml
.*Axr\x3
public int get() { vMYEP_lhK,
return queue[1]; T,uJO<
} ;y.<I&
~>uu1[/
public void remove() { /Z2 g>
SortUtil.swap(queue,1,size--); T^@P.zX
fixDown(1); m^;A]0h+
} Uc0Sb
file://fixdown YR.f`-<Z
private void fixDown(int k) { Ym wb2]M
int j; Bg}(Sy
while ((j = k << 1) <= size) { S~ZRqL7ZO
if (j < size %26amp;%26amp; queue[j] j++; gcF V$
if (queue[k]>queue[j]) file://不用交换 jN%+)Kj0C)
break; KV|ywcGhT
SortUtil.swap(queue,j,k); L8cPNgZ
k = j; xL|4'8
} ^20x\K
} J1d|L|M
private void fixUp(int k) { R]y9>5 'U
while (k > 1) { ^ oh%Ns
int j = k >> 1; Ip*[H#h
if (queue[j]>queue[k]) 7VA6J-T
break; vb2aj!8_?
SortUtil.swap(queue,j,k); *Edr\P
k = j; 7WN$ rl5/
} O;RNmiVoq
} :snn-e0l
o[>p
} (^= Hq'D
Cz#3W8jV
} 5YgUk[J
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SortUtil： 1~9AQ[]w8
.iH#8Z
package org.rut.util.algorithm; #mbl4a
Xj;5i Vq
import org.rut.util.algorithm.support.BubbleSort; <P<^,aC/j
import org.rut.util.algorithm.support.HeapSort; d5tpw$A
import org.rut.util.algorithm.support.ImprovedMergeSort; Gq^#.o]
import org.rut.util.algorithm.support.ImprovedQuickSort; ;AE%f.Y
import org.rut.util.algorithm.support.InsertSort; -I{J]L$S#
import org.rut.util.algorithm.support.MergeSort; 0%5x&vx'S
import org.rut.util.algorithm.support.QuickSort; n`g:dz
import org.rut.util.algorithm.support.SelectionSort; gb@ |\n
import org.rut.util.algorithm.support.ShellSort; 8Zvh"Z?
s`"ALn8m
/** JulxFjC
* @author treeroot pd X"M>
* @since 2006-2-2 9{5 c}bX
* @version 1.0 kn|z
*/ ti9cfv>
public class SortUtil { /yj-^u\R
public final static int INSERT = 1; %]@K}!)2
public final static int BUBBLE = 2; 1">]w2je:
public final static int SELECTION = 3; <jRs/?1R
public final static int SHELL = 4; 9wC:8@`6E
public final static int QUICK = 5; \|9KOulr
public final static int IMPROVED_QUICK = 6; AAt<{
public final static int MERGE = 7; +qEvz<kch
public final static int IMPROVED_MERGE = 8; QZ54Osdl
public final static int HEAP = 9; 6'N!)b^-
()+;KF8
public static void sort(int[] data) { dSBW&-p
sort(data, IMPROVED_QUICK); CfnRcnms
} `;R|SyrX
private static String[] name={ $0K%H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y3!=0uPf
}; u!DSyHR '
weiqt *,8
private static Sort[] impl=new Sort[]{ l7r!fAV-f
new InsertSort(), <ST#< $%
new BubbleSort(), /Iu._2
new SelectionSort(), !&Q3>8l
new ShellSort(), l@om2|B
new QuickSort(), cuP5cL/Y
new ImprovedQuickSort(), B$)6X
new MergeSort(), UI:{*N**Z
new ImprovedMergeSort(), 0|:Ic,
new HeapSort() $|YIr7?R
}; ]4>[y?k34
.SdEhW15)
public static String toString(int algorithm){ *<!W k\
return name[algorithm-1]; S!n 9A
} >cD+&h34
w%k)J{\
public static void sort(int[] data, int algorithm) { 97Qng*i
impl[algorithm-1].sort(data); k852M^JP
} %6"b< MAO
05MtQB
public static interface Sort { J7.bFW'
public void sort(int[] data); wDZFOx0#8
} [j0I}+@4H
fwRlqfi
public static void swap(int[] data, int i, int j) { |pp@
int temp = data; 0{Kl5>Z9M
data = data[j]; iEki<e/
data[j] = temp; GD'C^\EaZ
} /)de`k"
} UUY-EC7X