[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; #w-xBM @
} e\JojaV
int i1=l; W.0L:3<"
int i2=mid+1; H& Ca`B
for(int cur=l;cur<=r;cur++){ mPP`xL?T
if(i1==mid+1) S"$m]
data[cur]=temp[i2++]; '07P&g-
else if(i2>r) !M]\I&
data[cur]=temp[i1++]; bk^TFE1l
else if(temp[i1] data[cur]=temp[i1++]; ) ^3avRsC
else Gz[fG
data[cur]=temp[i2++]; .]7Qu;L
} A\#P*+k0
} Y> Wu
Zg`Mz _?
} /E5 5Pec
:`2=@.
改进后的归并排序: 5-0{+R5v
s)2fG\1
package org.rut.util.algorithm.support; QtqfG{
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import org.rut.util.algorithm.SortUtil; O Wj@<N
r~nsN*t
/** z2hc.29t
* @author treeroot F]t(%{#W
* @since 2006-2-2 BC;:
* @version 1.0 *"r~-&IL
*/ 3lq Mucr
public class ImprovedMergeSort implements SortUtil.Sort { a~!G%})'a
b-*3 2Y%
private static final int THRESHOLD = 10; Gkxj?)`
n[,w f9
/* p6XtTx
* (non-Javadoc) J@ktyd(P
* }sFm9j7yR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <P;}unq.kw
*/ U(;&(W"M
public void sort(int[] data) { ^T,Gu-2>
int[] temp=new int[data.length]; FSbHn{@
mergeSort(data,temp,0,data.length-1); _ _>.,gL7
} W|,V50K
TSsKfexQ
private void mergeSort(int[] data, int[] temp, int l, int r) { 1#4PG'H
int i, j, k; c9nH}/I_
int mid = (l + r) / 2; 4~OQhiJ
if (l == r) (x$9~;<S*d
return; k%op> &
if ((mid - l) >= THRESHOLD) Vax^8 -
mergeSort(data, temp, l, mid); ;u(Du-Os!
else Y05P'Q
insertSort(data, l, mid - l + 1); [J0v&{)?
if ((r - mid) > THRESHOLD) 7RvUH-S[
mergeSort(data, temp, mid + 1, r); lw(e3j
else ACK1@eF
insertSort(data, mid + 1, r - mid); @&hnL9D8lL
a3>zoN
for (i = l; i <= mid; i++) { Wi}FY }f
temp = data; pBC<u
} l"zUv
for (j = 1; j <= r - mid; j++) { 7gS1~Q4\V2
temp[r - j + 1] = data[j + mid]; [!VOw@uz
} nB ".'=
int a = temp[l]; Z_1*YRBY;
int b = temp[r]; ^R$'eG 4L?
for (i = l, j = r, k = l; k <= r; k++) { -n? g~(/P
if (a < b) { p=QYc)3F
data[k] = temp[i++]; ~/tKMS6T
a = temp; 2`=6%s
} else { S|GWcSg
data[k] = temp[j--]; ^SfS~GQ
b = temp[j]; 9(!]NNf!
} xDO7A5
} mty1p'^KQ
} ,A5)<}
)OsLrq/
/** (HN4g;{
* @param data Yp4c'Zk
* @param l 2PSTGG8JV
* @param i ;#G%U!p
*/ h.whjiCFa
private void insertSort(int[] data, int start, int len) { G;oFTP>o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cv=GZGn-
} #rYENR[
} H%z@h~s>
} em]xtya
} T_OF7?
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堆排序： tO.$+4a
1:= `Y@.S
package org.rut.util.algorithm.support; 3An(jt$%Q
=<<3Pkv7@
import org.rut.util.algorithm.SortUtil; hGP1(pH.
3LlU]
/** H*W):j}8
* @author treeroot =`I?mn&
* @since 2006-2-2 b5e@oIK
* @version 1.0 9[|4[3K
*/ Qp!Y.YnPd_
public class HeapSort implements SortUtil.Sort{ zd`=Ih2Wx
BQjam+u6
/* (non-Javadoc) =p\Xy*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =wA5P@
*/ XS0V:<+,
public void sort(int[] data) { H(\V+@~>AD
MaxHeap h=new MaxHeap(); =[(1my7
h.init(data); "oE*9J?e
for(int i=0;i h.remove(); KP~-$NR
System.arraycopy(h.queue,1,data,0,data.length); x9}++r
} Sa}D.SBg
XN;/nU
private static class MaxHeap{ sA_X<>vAKJ
:k1$g+(lP
void init(int[] data){ G6Q4-kcK
this.queue=new int[data.length+1]; v"k4ATWP
for(int i=0;i queue[++size]=data; KF{a$d
fixUp(size); I>((o`
} SLA#= K
} ${e&A^h
%\yK5V5
private int size=0; !P"?
deM~[1e[
private int[] queue; l @A"U)A(
`D)S-7BR
public int get() { sfC@*Y2XT
return queue[1]; =8S}Iat
} [s %\.y(q
B,0+HoP
public void remove() { fNEz
SortUtil.swap(queue,1,size--); /.-m}0h|W-
fixDown(1); J3\)Jy
} gX"T*d>y
file://fixdown kh&_#,
private void fixDown(int k) { 0|Q.U
int j; jf7pl8gv
while ((j = k << 1) <= size) { F`D9Zfd
if (j < size %26amp;%26amp; queue[j] j++; u-M] Az-
if (queue[k]>queue[j]) file://不用交换 Fc{((x s
break; h*l4Y!7
SortUtil.swap(queue,j,k); 0nT%Slbih
k = j; (lb`#TTGx
} 2?H@$-x>
} ,^!Zm^4,
private void fixUp(int k) { GFY-IC+fc
while (k > 1) { Zr R+QV
int j = k >> 1; bN4d:0Y
if (queue[j]>queue[k]) 67,3i~
break; z.A4x#>-
SortUtil.swap(queue,j,k); 4Q/r[x/&C
k = j; :3 PGf
} V!}L<cN
} g)nXo:)&
5A;"jp^ Z
} o8mo=V4j
6e&g$R v
} 0 c,bet{m
f!^)!~
SortUtil： 4KZSL:A
@#1cx
package org.rut.util.algorithm; -D$3!ccX
KdS eCeddW
import org.rut.util.algorithm.support.BubbleSort; =sL(^UISl
import org.rut.util.algorithm.support.HeapSort; *;Ak5.du
import org.rut.util.algorithm.support.ImprovedMergeSort; T?ZOHH8
import org.rut.util.algorithm.support.ImprovedQuickSort; \v.HG] /u
import org.rut.util.algorithm.support.InsertSort; '>"`)-
import org.rut.util.algorithm.support.MergeSort; ]C+eJ0"A
import org.rut.util.algorithm.support.QuickSort; E]1\iV
import org.rut.util.algorithm.support.SelectionSort; \8 g.
import org.rut.util.algorithm.support.ShellSort; G|<]Ma9x
0%#t[usY
/** rK*hTjVn
* @author treeroot ,&-S?|
* @since 2006-2-2 Hu[8HzJo
* @version 1.0 mMn2(
*/ cvn-*Sj
public class SortUtil { zkuv\kY/Z
public final static int INSERT = 1; =lYvj
public final static int BUBBLE = 2; b;SFI^
public final static int SELECTION = 3; :17ee
public final static int SHELL = 4; N=hSqw[
public final static int QUICK = 5; :t_}_!~
public final static int IMPROVED_QUICK = 6; YmdsI+DbIu
public final static int MERGE = 7; oM/B.U2a
public final static int IMPROVED_MERGE = 8; (*LTqC
public final static int HEAP = 9; hQ\#Fhu7
W,0KBkkp
public static void sort(int[] data) { sxf}Mmsk
sort(data, IMPROVED_QUICK); wOD/Z8
} 4da^d9ZOy
private static String[] name={ C!CaGf=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O@G<B8U,K
}; :-W$PIBe
*g}vT8w'}
private static Sort[] impl=new Sort[]{ [~zE,!
new InsertSort(), (or =f`
new BubbleSort(), L5hQdT/b$
new SelectionSort(), (, ;MC/l
new ShellSort(), O~7p^i}
new QuickSort(), C@l +\M(
new ImprovedQuickSort(), _N[^Hl`\
new MergeSort(), .&aVx]
new ImprovedMergeSort(), e7)>U!9c9
new HeapSort() NZC<m$')
}; Pl`Bd0
PW(_yB;
public static String toString(int algorithm){ /3xFd)|Ds
return name[algorithm-1]; Q*TQ*J7".X
} =|DkD- O
$D0)j(v
public static void sort(int[] data, int algorithm) { {EiG23!qV
impl[algorithm-1].sort(data); N^@%qUvT]
} )o}=z\M-bN
bCe[nmE2
public static interface Sort { gwkZk-f\p
public void sort(int[] data); J:M<9W
} l,~ N~?
"N=&4<]I5
public static void swap(int[] data, int i, int j) { \, X?K
int temp = data; HzFt
data = data[j]; r' 97\|
data[j] = temp; dqK
} P^o"PKA
} |iF1A