[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; TzK[:o
} h`/1JjP
int i1=l; woR }=\K
int i2=mid+1; T13Jno
for(int cur=l;cur<=r;cur++){ .R{P%r
if(i1==mid+1) >zB0+l
data[cur]=temp[i2++]; I?i,21:5
else if(i2>r) JV9Ft,xk
data[cur]=temp[i1++]; X.!|#FWb+
else if(temp[i1] data[cur]=temp[i1++]; e5fzV.'5
else z c,Q
data[cur]=temp[i2++]; lDhuL;9e
} }K\m.+%=d
} Iw) 'Yyg
qluaop
} f}F
viR-h iD
改进后的归并排序: <3c|S_|L*m
2:& [r*
package org.rut.util.algorithm.support; 2u'h,on?
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import org.rut.util.algorithm.SortUtil; 4';(\42
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/** C\p _
* @author treeroot }z8HS< #Q
* @since 2006-2-2 `=cOTn52
* @version 1.0 m;KD@E!
*/ Smlf9h&
public class ImprovedMergeSort implements SortUtil.Sort { 0^rDf L
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private static final int THRESHOLD = 10; t@\op}Z-M
6H}8^'/u
/* Qape DU;
* (non-Javadoc) G[5z3
* +cnBEv~y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RP4P"m(
*/ I<ta2<h
public void sort(int[] data) { AVbGJ+
int[] temp=new int[data.length]; [boB4>.
mergeSort(data,temp,0,data.length-1); kI>PaZ`i)
} ThSB\
_-/<bO
private void mergeSort(int[] data, int[] temp, int l, int r) { AjA.="3
int i, j, k; #q%V|Ajq
int mid = (l + r) / 2; ",qJG]_ <
if (l == r) 9n[ovX 7n!
return; B7!dp`rPp
if ((mid - l) >= THRESHOLD) w>ap8><4
mergeSort(data, temp, l, mid); !*l5%H
else Sx3R2-!Z
insertSort(data, l, mid - l + 1); Z>zW83a
if ((r - mid) > THRESHOLD) G;3N"az
mergeSort(data, temp, mid + 1, r); OwM.N+z#T
else 1W +QcK4k
insertSort(data, mid + 1, r - mid); D/-$~u_o
L H`z '7&/
for (i = l; i <= mid; i++) { KnuQ5\y
temp = data; i'bUX=JK
} KcQe1mT!+
for (j = 1; j <= r - mid; j++) { K-b'jP\
temp[r - j + 1] = data[j + mid]; Pe_FW8e#J
} 'u{DFMB-A
int a = temp[l]; ,HLgb}~
int b = temp[r]; _YgvLz %
for (i = l, j = r, k = l; k <= r; k++) { Fb{kql=
if (a < b) { E|fQbkfw
data[k] = temp[i++]; J<'I.KZ\z
a = temp; I2PFJXp_]n
} else { eDPmUlC+-
data[k] = temp[j--]; Gv3AJ'NL
b = temp[j]; +kK6G#c
} 5<y pK`Kq
} I6E!$}
} !DUC#)F
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/** NXw$PM|+R
* @param data g$jZpU
* @param l 9(;I+.;8k
* @param i D~s TQfWr
*/ CAl]Kpc
private void insertSort(int[] data, int start, int len) { n@Ar%%\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3r(i=ac0
} +Ks! 9d*k<
} ,[{)4J$MV
} u`2[V4=L
} 06#40-
)6 _+
堆排序： 4/tp-dBip
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package org.rut.util.algorithm.support; `fRp9o/
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import org.rut.util.algorithm.SortUtil; xiW;Y{kZ
s;;"^5B.
/** T$ )dc^
* @author treeroot _v9P0W^.7
* @since 2006-2-2 ZRd,V~iz
* @version 1.0 V@"Y"}4n4
*/ Z1gZn)7
public class HeapSort implements SortUtil.Sort{ =7U_ jDME
oHbG-p
/* (non-Javadoc) FX#fh 2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #AJo75E%
*/ ![,W?
public void sort(int[] data) { _s_%}8o
MaxHeap h=new MaxHeap(); /.u0rxoRP}
h.init(data); >[ox|_o
for(int i=0;i h.remove(); ?Hd/!I&
System.arraycopy(h.queue,1,data,0,data.length); mw*BaDN@Q
} viJK%^U=-
wA#w]8SM
private static class MaxHeap{ 855JAf
s@ ~Y!A
void init(int[] data){ '!%Zf;Fjr
this.queue=new int[data.length+1]; uzx?U3.\
for(int i=0;i queue[++size]=data; hZobFf
fixUp(size); &7YTz3aj
} 1eZ759PoO
} Oa'DVfw2J
,L"1Ah
private int size=0; h!L/ZeRaV
AMhHq/Dw
private int[] queue; m*d {pX
Yc,qXK-
public int get() { B7fV_-p:G
return queue[1]; }? W[D
} 8a^E{x@HT
,/=Fm
public void remove() { n8.W$&-ia
SortUtil.swap(queue,1,size--); H.HXwN/x
fixDown(1); QD}'2{M!
} x dT1jI
file://fixdown >2[\WF*"X
private void fixDown(int k) { 1$*ZN4
int j; "0(H! }D
while ((j = k << 1) <= size) { Vu/{Hr
if (j < size %26amp;%26amp; queue[j] j++; <&+\X6w[
if (queue[k]>queue[j]) file://不用交换 ,p,$(V
break; J\BTrN7
SortUtil.swap(queue,j,k); ;e>pu"#
k = j; hw@ `Q@
} e7(iMe
} OUd&fUmH
private void fixUp(int k) { QD6in>+B@
while (k > 1) { (Mk9##R#
int j = k >> 1; ky`xBO=
if (queue[j]>queue[k]) (W~')A"hC'
break; \D9J!K82
SortUtil.swap(queue,j,k); oM&}akPE
k = j; BJ0P1vh6M
} !5hNG('f
} \Tc<27-
pE<@
} b=5"*=T{+
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} <@DF0x!
O]>FNsh!
SortUtil： LovVJ^TD0i
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package org.rut.util.algorithm; ,co~@a@9
0~(K@U>#
import org.rut.util.algorithm.support.BubbleSort; YTc X4cC
import org.rut.util.algorithm.support.HeapSort; {xFgPtCM
import org.rut.util.algorithm.support.ImprovedMergeSort; zT\nj&7
import org.rut.util.algorithm.support.ImprovedQuickSort; [p+]H?(A
import org.rut.util.algorithm.support.InsertSort; [IF5Iv\b
import org.rut.util.algorithm.support.MergeSort; =V- ^
import org.rut.util.algorithm.support.QuickSort; 8gQg#^,(t
import org.rut.util.algorithm.support.SelectionSort; [O"9OW'2!B
import org.rut.util.algorithm.support.ShellSort; k//l~A9m
gH+s)6
/** |4J ;s7us
* @author treeroot 3KyIBrdi?
* @since 2006-2-2 Z?Cl5o&lb
* @version 1.0 1%v!8$
*/ PJ-EQ6W
public class SortUtil { zz)[4G
public final static int INSERT = 1; )(?,1>k`Z
public final static int BUBBLE = 2; jvI!BZ
public final static int SELECTION = 3; M@k8;_5
public final static int SHELL = 4; l@ amAusE
public final static int QUICK = 5; CNo'qlvF5N
public final static int IMPROVED_QUICK = 6; qT<OiIMj^
public final static int MERGE = 7; B<99-7x3
public final static int IMPROVED_MERGE = 8; kq{PM-]l
public final static int HEAP = 9; x6i7x"
M+7&kt0;
public static void sort(int[] data) { A5UZUU^
sort(data, IMPROVED_QUICK); \gBsAZE
} @O!BQ^'hk#
private static String[] name={ !O`aaLc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lp|7s8?
}; Ft&ARTsa*
Io|3zE*<
private static Sort[] impl=new Sort[]{ m| /?((s
new InsertSort(), I%^Bl:M
new BubbleSort(), K1th>!JW'
new SelectionSort(), :7WeR0*%
new ShellSort(), BHNcE*U}@?
new QuickSort(), 6T?$m7c
new ImprovedQuickSort(), 5f~49(v]
new MergeSort(), }{R?i,j(
new ImprovedMergeSort(), CFLWo1
new HeapSort() UJ/=RBfkJ
}; !-cO0c!
oMb&a0-7u
public static String toString(int algorithm){ M$jU-;hRH
return name[algorithm-1]; _d[4EY
} _Q**4
g< F7UA
public static void sort(int[] data, int algorithm) { &>@
impl[algorithm-1].sort(data); hT=6XO od4
} :t7M'BSm2z
pie,^-_.g
public static interface Sort { ?tA<:.<vtY
public void sort(int[] data); ;R_H8vp
} U_&v|2o#3
!`A]YcQ
public static void swap(int[] data, int i, int j) { r1jsw j%7
int temp = data; 6UK}?+r~
data = data[j]; ~7G@S&<PK(
data[j] = temp; 33M10 1X{6
} SHAC(3o/e
} Rk8oshS+2