[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; SS/vw%
} I[E 6N2
int i1=l; b`e_}^,c
int i2=mid+1; Ug*B[q/
for(int cur=l;cur<=r;cur++){ ~&~4{
if(i1==mid+1) c|<F8n
data[cur]=temp[i2++]; hNc8uV{r=
else if(i2>r) CVO_F=;
data[cur]=temp[i1++]; xa`xHh{0
else if(temp[i1] data[cur]=temp[i1++]; &S="]*Z
else CDJ@Tdp
data[cur]=temp[i2++]; ;"D}"nL
} #ed|0
} ]*NYuEgc
u-~ec{oBu
} {/noYB<;
1e\cJ{B
改进后的归并排序: C2<TR PT
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package org.rut.util.algorithm.support; |0ZJ[[2
10Eun }
import org.rut.util.algorithm.SortUtil; M2%@bETJ
Wl3S]4A
/** La6 9or
* @author treeroot !WXV1S
* @since 2006-2-2 QYH#WrIVx
* @version 1.0 jA"}\^%3
*/ IWYQ67Yj
public class ImprovedMergeSort implements SortUtil.Sort { u""26k51
=.s0"[%
private static final int THRESHOLD = 10; o;c"-^>
W$]qo|2P
/* Fepsa;\sU
* (non-Javadoc) KS#A*BRQ
* &Sb)a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q>L(=j2t
*/ TQb/lY9*
public void sort(int[] data) { /- Gq`9Z
int[] temp=new int[data.length]; ]$#bNt/p
mergeSort(data,temp,0,data.length-1); ,~7~ S"
} 0Fkr3x
[+FiD
private void mergeSort(int[] data, int[] temp, int l, int r) { bB0/FiY7o
int i, j, k; 8$c)]Bv
int mid = (l + r) / 2; wMkHx3XD
if (l == r) ok6t| 7sq
return; j![1
if ((mid - l) >= THRESHOLD) QcWg
mergeSort(data, temp, l, mid); Wx}-H/t'2
else 2r2:
insertSort(data, l, mid - l + 1); 0(o2<d7
if ((r - mid) > THRESHOLD) =zH)R0!eG
mergeSort(data, temp, mid + 1, r); Fr50hrtkU
else e 6wevK\
insertSort(data, mid + 1, r - mid); 0vEQgx>
?h1g$SBxk
for (i = l; i <= mid; i++) { uj)vh
temp = data; ADF<5#I
} 4,@jSr|I3i
for (j = 1; j <= r - mid; j++) { dB~A4pZa
temp[r - j + 1] = data[j + mid]; 1 jLQij
} 5(2 C
int a = temp[l]; DI(XB6
int b = temp[r]; w15a~\Qu
for (i = l, j = r, k = l; k <= r; k++) { Eve,*ATI
if (a < b) { (mbm',%-(
data[k] = temp[i++]; gcI<bY
a = temp; ?*UWg[
} else { 'h;qI&
data[k] = temp[j--]; g?iZ RM
b = temp[j]; oR%cG"y
} >;"%Db
} !r6Yq,3
} ;9#%E
B*)mHSs2
/** H/*slqL
* @param data Hi2JG{i
* @param l v6wg,,T
* @param i %<8?$-[
*/ G,+3(C
private void insertSort(int[] data, int start, int len) { \'zloBU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zcw<USF8
} -|u yJh
} A:4&XRYZY
} yzl}!& E
} =oq=``%
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堆排序： EqBTN07dZS
}!r pH{y
package org.rut.util.algorithm.support; Ll%}nti
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import org.rut.util.algorithm.SortUtil; +2p}KpOsL
!]fSS)\H
/** BbCW3!(
* @author treeroot oV9{{
* @since 2006-2-2 [ns==gDD
* @version 1.0 gw">xt5
*/ Kv:.bHN}
public class HeapSort implements SortUtil.Sort{ mBB"e"o
> Xij+tt{
/* (non-Javadoc) }fef*>>}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (["V( $
*/ Y~*aA&D
public void sort(int[] data) { {~#PM>f
MaxHeap h=new MaxHeap(); p Djt\R<f
h.init(data); }G^'y8U
for(int i=0;i h.remove(); m$hkmD|
System.arraycopy(h.queue,1,data,0,data.length); '~7zeZ'
} -2u)orWP
h3GUFiZ.
private static class MaxHeap{ zmu+un"\j
^U*1_|Jh
void init(int[] data){ (7&b)"y
this.queue=new int[data.length+1]; xh#pw2v7V
for(int i=0;i queue[++size]=data; x|c_(
fixUp(size); UxF9Ko( ]d
} {,(iL8,^
} I#]pk!
Q.3:"dT
private int size=0; {61Y;
j0Cj&x%qF}
private int[] queue; zK_P3rLsS
M^e}w!U
public int get() { 48 0M|^
return queue[1]; ZzQLbCV
} 6]?W&r|0I
l&kZ6lZ
public void remove() { YRv96|c,
SortUtil.swap(queue,1,size--); M_%c9g@x
fixDown(1); 1U^KN~!
} Wi,)a{
file://fixdown 2AMb-&po&f
private void fixDown(int k) { 4#:Eq=(W
int j; Jk7 Am-.0
while ((j = k << 1) <= size) { MZWv#;.]
if (j < size %26amp;%26amp; queue[j] j++; 8^_e>q*W
if (queue[k]>queue[j]) file://不用交换 mH\2XG8nV
break; <5#2^(
SortUtil.swap(queue,j,k); nz#eJ
k = j; R[*n3 wB
} L(k`1E
} 3Of!Ykf=
private void fixUp(int k) { 9x8Vsd
while (k > 1) { |QR9#Iv
int j = k >> 1; a({N}ZDo
if (queue[j]>queue[k]) $b7@S`5
break; ,&fZo9J9
SortUtil.swap(queue,j,k); i\DU<lD5VN
k = j; >#gDk K
} .N#KW
} p8?"}
nqTOAL9FF
} ;i/? fw[h
ZSD7%gE<D
} oQ*LP{M
tGbx/$Y
SortUtil： voTP,R[}85
[f[Wz{Q#Y
package org.rut.util.algorithm; M"qS#*{
T5I#7LN#
import org.rut.util.algorithm.support.BubbleSort; ?4aW^l6/
import org.rut.util.algorithm.support.HeapSort; %q9"2] cR
import org.rut.util.algorithm.support.ImprovedMergeSort; T2tvU*[=
import org.rut.util.algorithm.support.ImprovedQuickSort; Zw'050~-
import org.rut.util.algorithm.support.InsertSort; agkKm?xIL
import org.rut.util.algorithm.support.MergeSort; 7|_2@4-W6
import org.rut.util.algorithm.support.QuickSort; 3-1a+7fD
import org.rut.util.algorithm.support.SelectionSort; .j>MsQP#\C
import org.rut.util.algorithm.support.ShellSort; OA} r*Wz
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/** J6>tGKa+e
* @author treeroot _%\%
* @since 2006-2-2 EAxdF u
* @version 1.0 WB<MU:.Vc
*/ gf9U<J#&C
public class SortUtil { S;D]ym
public final static int INSERT = 1; TiG?r$6v%
public final static int BUBBLE = 2; {X_I>)Wg
public final static int SELECTION = 3; qHo Hh
public final static int SHELL = 4; &N+`O)$
public final static int QUICK = 5; ~_F;>N~
public final static int IMPROVED_QUICK = 6; T(]*jaB
public final static int MERGE = 7; ` vFDO$K
public final static int IMPROVED_MERGE = 8; AGjjhbGB
public final static int HEAP = 9; >ZeARCf"f
TXf60{:f
public static void sort(int[] data) { Z5*(xony0
sort(data, IMPROVED_QUICK); N[fwd=$\#
} xirq$sEl
private static String[] name={ L<B)BEE.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }QQ 7jE
}; `R7dn/
X?&{< vz
private static Sort[] impl=new Sort[]{ _6`GHx
new InsertSort(), MA}}w&
new BubbleSort(), utl-#Wwt/
new SelectionSort(), #sg dMrVQ
new ShellSort(), "68X+!
new QuickSort(), cu'(Hj
new ImprovedQuickSort(), G)M! , Q
new MergeSort(), o`7 Z<HF
new ImprovedMergeSort(), :xbj& l
new HeapSort() =YfzB!ld
}; j(K)CHH
FUJ<gqL
public static String toString(int algorithm){ :=5X)10
return name[algorithm-1]; _'X
} 261? 8&c
Oo FMOlb.Z
public static void sort(int[] data, int algorithm) { T}29(xz-(h
impl[algorithm-1].sort(data); ?E}gm>
} )UTjP/\gN
u?g&(h
public static interface Sort { .n4{xQo,EJ
public void sort(int[] data); ^w"hA;
} Hvy$DX|p
B9KBq$e
public static void swap(int[] data, int i, int j) { o2hZ=+w>
int temp = data; 7'Hh^0<
data = data[j]; #b:YY^{g_
data[j] = temp; gu~R4@3
} B.;@i;7L
} 3^-R_