[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; 6Wc'5t3
} K1m'20U
int i1=l; TV*@h2C"i
int i2=mid+1; `6 ?.ihV
for(int cur=l;cur<=r;cur++){ .?*TU~S
if(i1==mid+1) FlepM*
data[cur]=temp[i2++]; d@>1m:p
else if(i2>r) :x36Z4:
data[cur]=temp[i1++]; eWTbHF
else if(temp[i1] data[cur]=temp[i1++]; PR~9*#"v..
else n_@cjO
data[cur]=temp[i2++]; }g_\?z3gt
} ::8c pUc`f
} B%/N{i*Z
.|<+-Rsj
} GKa_6X_
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改进后的归并排序: S)vNWBO
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package org.rut.util.algorithm.support; B),Z*lpC
6;#Rd|
import org.rut.util.algorithm.SortUtil; N_| '`]D
T9&bY>f?
/** d{:0R9
* @author treeroot +'!Y[7|9iv
* @since 2006-2-2 R&9Q#n-
* @version 1.0 jRNDi_u?Wb
*/ HAc1w]{(
public class ImprovedMergeSort implements SortUtil.Sort { 1 JB~G7
fe!{vrS
private static final int THRESHOLD = 10; I"bz6t\~|
;)rXQm
/* ~(K{D D7[N
* (non-Javadoc) B8.uzX'p
* H?tX^HO:q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H/N4tWk"
*/ %)p?&_
public void sort(int[] data) { )Rr0f 8
int[] temp=new int[data.length]; ^s_7-p])(
mergeSort(data,temp,0,data.length-1); ?yy,3:
} D'<'"kUd
z`(">J
private void mergeSort(int[] data, int[] temp, int l, int r) { K410.o/=-
int i, j, k; pgEDh^[MW
int mid = (l + r) / 2; {W$K@vuV;?
if (l == r) ~NG+DyGa=
return; osZ]R
if ((mid - l) >= THRESHOLD) ?z0N-A2C2
mergeSort(data, temp, l, mid); MkX=34oc^
else SkyX\&
insertSort(data, l, mid - l + 1); 'mO>hD`V
if ((r - mid) > THRESHOLD) s"B+),Jod
mergeSort(data, temp, mid + 1, r); jj6yf.r6c
else ,yH\nqEz
insertSort(data, mid + 1, r - mid); 1"UHe*2
AH?4F"
for (i = l; i <= mid; i++) { ug^esB
temp = data; ppzQh1
} '^%kTNn
for (j = 1; j <= r - mid; j++) { 4Be\5Byr
temp[r - j + 1] = data[j + mid]; D";@)\jN
} cG,zO-H
int a = temp[l]; fs0EbVDF
int b = temp[r]; -;*lcY*
for (i = l, j = r, k = l; k <= r; k++) { ,-[z?dvO
if (a < b) { _BZ6Ws$C2
data[k] = temp[i++]; XeX`h_
a = temp; o>\o=%D.a
} else { n50WHlMtt
data[k] = temp[j--]; Y&-% N
b = temp[j]; ~3Y4_b5E
} Y`rli
} 8]Q#P
} oS^KC}X
EYA=fU
/** -ARks_\
* @param data LkXho>y
* @param l 2P^x'I
* @param i )6(|A$~C+
*/ &%m%b5
private void insertSort(int[] data, int start, int len) { yxAy1P;dX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bk[C=<X
} ty'/i!/\
} HI7w@V8Ed
} +QNsI2t;r
} 8Qhj_
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堆排序： &f2:aT)
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package org.rut.util.algorithm.support; :kFPPx?
K&eT*JW>
import org.rut.util.algorithm.SortUtil; qA"BoSw4
51Vqbtj^
/** cQ |Q-S
* @author treeroot {@6:kkd
* @since 2006-2-2 -Aojk8tc
* @version 1.0 PQp/&D4K
*/ B<i(Y1n[
public class HeapSort implements SortUtil.Sort{ [+Fajo;0
n'0r (
/* (non-Javadoc) p=odyf1hK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c0Pj})-
*/ `jSegG'
public void sort(int[] data) { u`D _
MaxHeap h=new MaxHeap(); u /]P
h.init(data); *jvP4Nz)k
for(int i=0;i h.remove(); V0BT./ B\<
System.arraycopy(h.queue,1,data,0,data.length); ',K:.$My
} zc$}4o
zXD/hM
private static class MaxHeap{ 3!$+N\ #w
Va?i#<a
void init(int[] data){ s1h|/7gG
this.queue=new int[data.length+1]; tDRo)z
for(int i=0;i queue[++size]=data; k%X $@NP
fixUp(size); yjsj+K pL
} X</Sl>[8
} 3n)$\aBE
4wkv#vi7!-
private int size=0; *5.wwV
Il Qk W<
private int[] queue; AwjXY,2
T0Xm}i
public int get() { I;-Y2*
return queue[1]; [T,Hpt
} n}_}#(a
: NA(nA 3
public void remove() { ZE-vroh
SortUtil.swap(queue,1,size--); yo/;@}g}
fixDown(1); Km $o@
} 1Y*k"[?dW
file://fixdown !#:5^":;
private void fixDown(int k) { H`'a|Y
int j; ]WYV
while ((j = k << 1) <= size) { tsL ; wT_
if (j < size %26amp;%26amp; queue[j] j++; 5a'`%b{{
if (queue[k]>queue[j]) file://不用交换 g4b#U\D@)/
break; 8toOdh
SortUtil.swap(queue,j,k); &R?`QB2/
k = j; Ak,JPzT
} >mX6;6FF
} rR :ZTfJs"
private void fixUp(int k) { )WbWp4
while (k > 1) { J@2wPKh?Yp
int j = k >> 1; Rx&O}>"E>l
if (queue[j]>queue[k]) NIVR;gm
break; z?.9)T9_
SortUtil.swap(queue,j,k); ""jW'%wR
k = j; Te L&6F$
} E I(e3
} l=p_
@,GL&$Y:W
} EW(bM^dk}
a`n)aXU l
} 'I&0$<
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SortUtil： .FHk1~\%z^
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package org.rut.util.algorithm; mf$YsvPq*+
-yBKA]"<I
import org.rut.util.algorithm.support.BubbleSort; W/bW=.d Jd
import org.rut.util.algorithm.support.HeapSort; MGsQF#6]
import org.rut.util.algorithm.support.ImprovedMergeSort; ^J#*sn
import org.rut.util.algorithm.support.ImprovedQuickSort; $ mE*=
import org.rut.util.algorithm.support.InsertSort; 38p"lT
import org.rut.util.algorithm.support.MergeSort; tngB;9c+w
import org.rut.util.algorithm.support.QuickSort; /]3[|
import org.rut.util.algorithm.support.SelectionSort; mdEJ'];AH
import org.rut.util.algorithm.support.ShellSort; DOJydYds
qsp.`9!
/** Hvm}@3F|
* @author treeroot iW(LD1~7
* @since 2006-2-2 }+n|0xK
* @version 1.0 d<7b<f"~
*/ zp;!HP;/=
public class SortUtil { Pgr2S I
public final static int INSERT = 1; rZ `1G
public final static int BUBBLE = 2; (l^7EpNs
public final static int SELECTION = 3; &]o-ZZX
public final static int SHELL = 4; qx5`lm~L
public final static int QUICK = 5; o13jd NQ-
public final static int IMPROVED_QUICK = 6; 5OI.Ka
public final static int MERGE = 7; ]6^<VC`5D
public final static int IMPROVED_MERGE = 8; ?d-w#<AiV
public final static int HEAP = 9; ;yomaAr
8l5>t
public static void sort(int[] data) { aNEah
sort(data, IMPROVED_QUICK); ]##aAh-P4&
} H9(?yI@Zr#
private static String[] name={ sWo`dZ\6WB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %m |I=P
}; "iK= 8
h5'hP>b#
private static Sort[] impl=new Sort[]{ !l0]IX` F
new InsertSort(), Lmte ~oBi
new BubbleSort(), 'NlhLu
new SelectionSort(), 60!%^O =
new ShellSort(), 7?=^0?a
new QuickSort(), G^W0!u,@
new ImprovedQuickSort(), 6h>#;M
new MergeSort(), WT ;2aS:
new ImprovedMergeSort(), r& a[?
new HeapSort() c9-$^yno
}; +<1 |apS1
1p.c6[9-
public static String toString(int algorithm){ }:IIk-JoC
return name[algorithm-1]; `MSig)V
} 9i5?J]o^
_cs(f<>oCO
public static void sort(int[] data, int algorithm) { SCcvU4`o
impl[algorithm-1].sort(data); d^}p#7mB\
} }pMVl
@-)?uYw:r
public static interface Sort { @.W;3|~qc
public void sort(int[] data); T/'z,,Y
} Vn^GJ'^
!l $d^y345
public static void swap(int[] data, int i, int j) { X,v.1#[
int temp = data; jhm3:;Z
data = data[j]; )*BZo>"
data[j] = temp; h:8P9WhWF
} -O *_+8f
} ^L2d%d\5