[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; h" YA>_1
} h7\EN
int i1=l; ELV$!f|u
int i2=mid+1; LrfyH"#!:
for(int cur=l;cur<=r;cur++){ QZ-6aq\sgp
if(i1==mid+1) Rm.9`<Y
data[cur]=temp[i2++]; {7Ez7'SVV
else if(i2>r) ctC!b{S"@
data[cur]=temp[i1++]; ,J-YfL^x6*
else if(temp[i1] data[cur]=temp[i1++]; cRPy5['E
else j|% C?N
data[cur]=temp[i2++]; D2Kh+~l
} \U`rF
} C"}]PW
VN4H+9E
} & V/t0
vw q Y;7
改进后的归并排序: 5|[\Se#
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package org.rut.util.algorithm.support; W$Z""
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import org.rut.util.algorithm.SortUtil; @h\u}Ee
zI>,A|yy
/** CI?M2\<g
* @author treeroot 8>^O]5Wo`X
* @since 2006-2-2 _Ai\XS Am
* @version 1.0 2ap0/l[
*/ .7zdA IKW
public class ImprovedMergeSort implements SortUtil.Sort { h "r)z6Q/
wvSaq+N
private static final int THRESHOLD = 10; 0/%VejZ'
*}i.,4+y
/* F_%&,"$
* (non-Javadoc) XAr YmO
* 8-R; &
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zTt6L6:u
*/ *$7c||J7
public void sort(int[] data) { B8G1 #V_jK
int[] temp=new int[data.length]; $5l=&
mergeSort(data,temp,0,data.length-1); T%:W6fH7
} 3m`y?Dd
j.rJfbE|X
private void mergeSort(int[] data, int[] temp, int l, int r) { RIl+QA
int i, j, k; A0Hsd
int mid = (l + r) / 2; Hq$?-%4
if (l == r) {#1}YGpiVM
return; '.DFyHsq
if ((mid - l) >= THRESHOLD) AA,n.;zy<
mergeSort(data, temp, l, mid); >'lte&
else -5yEd>Z
insertSort(data, l, mid - l + 1); "Tm`V9
if ((r - mid) > THRESHOLD) /v:+ vh*mS
mergeSort(data, temp, mid + 1, r); X8b= z9
else -d 6B;I<'
insertSort(data, mid + 1, r - mid); co%ttH\ n
o;@T6-VH
for (i = l; i <= mid; i++) { f~? MNJ2
temp = data; 13P8Zmco
} .qBf`T;
for (j = 1; j <= r - mid; j++) { m;nT ?kv
temp[r - j + 1] = data[j + mid]; `H6kC$^Ofx
} F&lvofy23
int a = temp[l]; RI_3X5.KQ
int b = temp[r]; /g!', r,
for (i = l, j = r, k = l; k <= r; k++) { 'e>0*hF[
if (a < b) { ]T! >]
data[k] = temp[i++]; }A`4ae=
a = temp; M1T)e9k=x
} else { mMvt#+O
data[k] = temp[j--]; B@Q Ate7
b = temp[j]; 4`7:gfrO,
} h~ =UFE%'
} ]MP6VT
} W]rK*Dc
!1}A\S
/** q~=]_PMP
* @param data _ZfJfd~
* @param l bEE'50D
* @param i i7w>Nvj]
*/ sc^TElic
private void insertSort(int[] data, int start, int len) { n_51-^*z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 64>o3Hb2
} /-l7GswF
} $;dSM<r
} ]I#yS=;
} 5Vzi{y/bL
=5jX#Dc5.+
堆排序： qffXm`k
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package org.rut.util.algorithm.support; <OcD[5
jR#g>MDKB
import org.rut.util.algorithm.SortUtil; O#E]a<N`
/K"koV;
/** d[5?P?h')
* @author treeroot /JfRy%31
* @since 2006-2-2 G.,dP+i
* @version 1.0 :.IVf Zw
*/ VMUK|pC4K
public class HeapSort implements SortUtil.Sort{ %_!YonRY|X
SAt{At
/* (non-Javadoc) IR,`-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?j{LE-(
*/ $)M8@d
public void sort(int[] data) { &JM|u ww?1
MaxHeap h=new MaxHeap(); *;wPAQE
h.init(data); eEIa=MB*
for(int i=0;i h.remove(); |*Dklo9{
System.arraycopy(h.queue,1,data,0,data.length); !52]'yub
} R;gN^Yjk:
PG8|w[V1"
private static class MaxHeap{ I_IDrS)O
9GuG"^08
void init(int[] data){ hGx)X64Mw
this.queue=new int[data.length+1]; ((TiBCF4
for(int i=0;i queue[++size]=data; 3eqnc),Z
fixUp(size); YT6<1-E#
} h+Dp<b
} (7G5y7wI"
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private int size=0; {i)k#`
lz?F ,].
private int[] queue; 4 e1=b,
^9 gFW $]
public int get() { *4;MO2g
return queue[1]; VQO6!ToKY
} *wcb5p
`w1|(Sk$h
public void remove() { '-tiH
SortUtil.swap(queue,1,size--); C d)j%
fixDown(1); E=.4(J7K
} w%&lCu@v
file://fixdown _Kg:jal
private void fixDown(int k) { y|1,h}H^n
int j; (-tF=wR,W
while ((j = k << 1) <= size) { \e64Us>"x
if (j < size %26amp;%26amp; queue[j] j++; 00 Qn1
if (queue[k]>queue[j]) file://不用交换 p=vu<xXtD
break; 4hep1Kz%
SortUtil.swap(queue,j,k); )>$@cH
k = j; <o8j+G)K#
} ^b=9{.5
} j'#M'W3@
private void fixUp(int k) { FOxMt;|M
while (k > 1) { sHx>UvN6
int j = k >> 1; pJ7M.C!
if (queue[j]>queue[k]) ."<mL}Fi(
break; vkWh2z
SortUtil.swap(queue,j,k); #;?j]npg]
k = j; YoV^Y&:9<
} y~CK&[H
} AOhfQ:E 4
$IzhaX
} fGDR<t3yiQ
sf\p>gb
} 47b=>D8
g/&`NlD
SortUtil： 6\ g-KO
2`qO'V3Q
package org.rut.util.algorithm; Zb<IZ)i#1
|X/QSL
import org.rut.util.algorithm.support.BubbleSort; ,b2YUb]U
import org.rut.util.algorithm.support.HeapSort; bLyU;
import org.rut.util.algorithm.support.ImprovedMergeSort; e)kN%JqW
import org.rut.util.algorithm.support.ImprovedQuickSort; ]5X=u(}
import org.rut.util.algorithm.support.InsertSort; #;59THdtPk
import org.rut.util.algorithm.support.MergeSort; <QoSq'g#,=
import org.rut.util.algorithm.support.QuickSort; IKx]?0sS
import org.rut.util.algorithm.support.SelectionSort; / E~)xgPM<
import org.rut.util.algorithm.support.ShellSort; =c 3;@CO
LP?E
/** .'QE o
* @author treeroot !PX`sIkT
* @since 2006-2-2 bM[!E8dF
* @version 1.0 Ergh]"AD6-
*/ Y;ytm #=
public class SortUtil { fG2hCP+
public final static int INSERT = 1; #jAlmxN
public final static int BUBBLE = 2; #flOaRl.
public final static int SELECTION = 3; 1oq5|2p
public final static int SHELL = 4; tJ>|t hk
public final static int QUICK = 5; jU\vg;nr
public final static int IMPROVED_QUICK = 6; ?;Ck]l#5ys
public final static int MERGE = 7; +cS%b}O`$
public final static int IMPROVED_MERGE = 8; -F.A1{l[.
public final static int HEAP = 9; UV}\#86!
UX3 ]cr
public static void sort(int[] data) { /,v>w,
sort(data, IMPROVED_QUICK); wg<UCmfu!
} YY~BNQn6d
private static String[] name={ V7}5Zw1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >\=~2>FCD
}; 4FK|y&p4r
$89hkUuTu^
private static Sort[] impl=new Sort[]{ Ig9yd S-.
new InsertSort(), ]B'Ac%Rx
new BubbleSort(), 88\0opL-
new SelectionSort(), bqjj6bf'o
new ShellSort(), tmM8YN|
new QuickSort(), t?JY@hT*
new ImprovedQuickSort(), [C)JI;\
new MergeSort(), ,MkldCV
new ImprovedMergeSort(), %Z|]"=;6
new HeapSort() . C_\xb
}; .kO!8Q-;%
WVaIC$Y
public static String toString(int algorithm){ _jkH}o '
return name[algorithm-1]; ~ KNdV
} }1<_
@* a'B=7
public static void sort(int[] data, int algorithm) { e!cZW.B=`f
impl[algorithm-1].sort(data); 72oiO[>N'
} OnGtIY
Hd)z[6u8eT
public static interface Sort { c5~d^
public void sort(int[] data); TNYd_:j
} hZ_0lX}
_2*Ryz
public static void swap(int[] data, int i, int j) { fJ"#c<n
int temp = data; b"x[+&%i
data = data[j]; +^!;J/24
data[j] = temp; 1eG@?~G
} > "G HLi
} B/#tR^R