[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; &|>~7(
} GF ux?8A:%
int i1=l; |HK:\)L%
int i2=mid+1; YqX$a~
for(int cur=l;cur<=r;cur++){ 4 ThFC
if(i1==mid+1) ~w>h#{RB
data[cur]=temp[i2++]; 1Nt &+o
else if(i2>r) ,Z"<-%3
data[cur]=temp[i1++]; EG>?>K_D
else if(temp[i1] data[cur]=temp[i1++]; !?>V^#c
else }S/i3$F0~
data[cur]=temp[i2++]; 1]7gYNzV"
} ]P?<2,
} |ri)-Bk ,
9wWBE<}>u
} $"kPzo~B_
3gi)QCsk
改进后的归并排序: E^i]eK*"
lxL5Rit@Px
package org.rut.util.algorithm.support; Q7865
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import org.rut.util.algorithm.SortUtil; 4KH492Nq9
)Z/"P\qo
/** OldOc5D
* @author treeroot NHGTV$T`1
* @since 2006-2-2 \]9)%3I
* @version 1.0 7N9NeSH
*/ )dT@0Ys%
public class ImprovedMergeSort implements SortUtil.Sort { !__0Vk[s
[%P#ieD4
private static final int THRESHOLD = 10; CZ5\Et6r
#V!a<w4_
/* K!-OUm5A
* (non-Javadoc) X$Vi=fvt
* fW-C`x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mOE *[S)
*/ 3"y 6|e/5
public void sort(int[] data) { .9jKD*U|
int[] temp=new int[data.length]; z]G|)16
mergeSort(data,temp,0,data.length-1); (>v'0RA
} \/NF??k,jk
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private void mergeSort(int[] data, int[] temp, int l, int r) { x}] 56f
int i, j, k; BN_h3|)
int mid = (l + r) / 2; 3 t,_{9
if (l == r) ix3LB!k<
return; REUxXaN>Z
if ((mid - l) >= THRESHOLD) )%7P?^>
mergeSort(data, temp, l, mid); 0xB2
else Qz~uD'Rs/
insertSort(data, l, mid - l + 1); isZ5s\
if ((r - mid) > THRESHOLD) 3P cVE\GN
mergeSort(data, temp, mid + 1, r); }|P3(*S
else .hl_zc#
insertSort(data, mid + 1, r - mid); bNea5u##
Aedf (L7\
for (i = l; i <= mid; i++) { xVm-4gB
temp = data; _;1{feR_
} iM+`7L'
for (j = 1; j <= r - mid; j++) { =kd$??F
temp[r - j + 1] = data[j + mid]; 9njl,Q:
} "z~ba>,-\
int a = temp[l]; qlO}=b/
int b = temp[r]; Ke$_l]}
for (i = l, j = r, k = l; k <= r; k++) { v4ot08 C
if (a < b) { V0nQmsP1U
data[k] = temp[i++]; y?$DDD
a = temp; '0+*
} else { 0t <nH%N}^
data[k] = temp[j--]; $83B10OQ&L
b = temp[j]; `3+i.wR
} g68p9#G
} )[Y B&
} mayJwBfU
lE:g A,
/** cw Obq\
* @param data aB]0?C y9(
* @param l 2xI|G 3U
* @param i ~^mUu`@r
*/ [{x}# oRSE
private void insertSort(int[] data, int start, int len) { xnP!P2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^jdU4
} ag=d6q
} t'qYM5
} >yBqi^aL
} ?8b19DMK6
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堆排序： GtA`0B
h!EA;2yGKa
package org.rut.util.algorithm.support; +EETo):
FcDS*ZEk!
import org.rut.util.algorithm.SortUtil; 4.RQ3SoDa
zKJ2~=
/** BrV{X&>[i
* @author treeroot Z~5) )5Ye;
* @since 2006-2-2 xUo6~9s7
* @version 1.0 m~=~DMj
*/ $<}c[Nm
public class HeapSort implements SortUtil.Sort{ #~u0R>=
LFp "Waiv
/* (non-Javadoc) o5 L^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F@w; .e!
*/ NTg@UT<
public void sort(int[] data) { IrLGAQ0
MaxHeap h=new MaxHeap(); ($[wCHU`!
h.init(data); [ERZ".?
for(int i=0;i h.remove(); zZ5:)YiW-
System.arraycopy(h.queue,1,data,0,data.length); }lJ;|kx$
} hp\&g2_S0W
NxT"A)u
private static class MaxHeap{ [|}IS@
UX 1 )((
void init(int[] data){ *H>rvE.K?
this.queue=new int[data.length+1]; :=*deZ<
for(int i=0;i queue[++size]=data; 9"[;ld<
fixUp(size); v9*m0|T0M
} JxAQ,oOO
} qWt}8_"
-yYdj1y;
private int size=0; N;7/C
#(8|9
private int[] queue; qUe _B
pSZ2>^";
public int get() { 6cQgp]%
return queue[1]; 1>!LK_
} gq?:n.;TY
+6m.f,14q
public void remove() { d0cL9&~qW
SortUtil.swap(queue,1,size--); Qzi?%&
fixDown(1); #YUaM<O
} 1<@SMcj>
file://fixdown mkl{Tp*
private void fixDown(int k) { ,$P,x
int j; FR&`R
while ((j = k << 1) <= size) { r~w.J+W
if (j < size %26amp;%26amp; queue[j] j++; H}@:Bri
if (queue[k]>queue[j]) file://不用交换 gEASYIQ
break; =bVPHrKNQ
SortUtil.swap(queue,j,k); >@ t
k = j; C@rGa7
} R%E7 |NAG
} t^t% >9o
private void fixUp(int k) { taQE r2Zy
while (k > 1) { YIU3}sJ!
int j = k >> 1; d_RgKdR )k
if (queue[j]>queue[k]) cs9^&N:w[
break; JTlk[c
SortUtil.swap(queue,j,k); IgT`on3Y
k = j; >ZA=9v
} bp1AN9~
} .8hI ad
+/:tap|V
} C*9X;+S0J
i;[y!U
} FhE{khc#
gr=h!'m
SortUtil： %x)bZ=An
+2tQFV;
package org.rut.util.algorithm; ==[,;g x
+^)v"@,VP
import org.rut.util.algorithm.support.BubbleSort; /@os*c|je
import org.rut.util.algorithm.support.HeapSort; +SJ.BmT
import org.rut.util.algorithm.support.ImprovedMergeSort; {K(mfTqm
import org.rut.util.algorithm.support.ImprovedQuickSort; IG-\&
import org.rut.util.algorithm.support.InsertSort; 5pO|^Gj1
import org.rut.util.algorithm.support.MergeSort; X1L@ G
import org.rut.util.algorithm.support.QuickSort; 4 1_gak;
import org.rut.util.algorithm.support.SelectionSort; ^5mc$~1`
import org.rut.util.algorithm.support.ShellSort; L9x-90'q,
8v:{BHX
/** >}5?`.K~Q*
* @author treeroot s-i|P
* @since 2006-2-2 0mw1CUx9K
* @version 1.0 yPyu)
*/ NnZW@ln"|
public class SortUtil { t [QD#;
public final static int INSERT = 1; @Mk`Tl
public final static int BUBBLE = 2; >r.]a`
public final static int SELECTION = 3; YJi%vQ*]
public final static int SHELL = 4; GQ_KYS{
public final static int QUICK = 5; MvVpp;bd
public final static int IMPROVED_QUICK = 6; AeJ ;g
public final static int MERGE = 7; voWH.[n^_
public final static int IMPROVED_MERGE = 8; 49$P
public final static int HEAP = 9; <LX\s*M)
J[ds.~ $
public static void sort(int[] data) { gN&i&%*!
sort(data, IMPROVED_QUICK); pO]gf$
} zF&VzNR2
private static String[] name={ T U%@_vYR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }xZi Ct
}; &&ioGy}1
%pWn9
private static Sort[] impl=new Sort[]{ 6iC>CY3CG
new InsertSort(), x)5}:b1B=
new BubbleSort(), dZM^?rq
new SelectionSort(), oy+|:[v:Fk
new ShellSort(), Iq$| ?MH
new QuickSort(), m 2H4V+M+
new ImprovedQuickSort(), j!;LN)s@?
new MergeSort(), W{p}N
new ImprovedMergeSort(), LiJYyp
new HeapSort() 37AVk`a
}; 5>532X(0
j;x()iZ<
public static String toString(int algorithm){ ez4!5&TzRm
return name[algorithm-1]; P<<$o-a"
} #h5:b`fDF
A|A~$v("R
public static void sort(int[] data, int algorithm) { z^Q'GBoBA
impl[algorithm-1].sort(data); [K{{P|(q
} y@P%t9l
De$AJl
public static interface Sort { "W<Y1$Y=Y
public void sort(int[] data); 'uPAG;)m
} 9>}&dQ8
'3.\+^3
public static void swap(int[] data, int i, int j) { $:ush"=f8^
int temp = data; s.3"2waZ=T
data = data[j]; 3G})$y3m
data[j] = temp; P8 X07IK
} Ik G&
} A^U84kV=