[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; BeD>y@ it
} L_+Fin
int i1=l; nB[B FVkU
int i2=mid+1; 0S }\ML
for(int cur=l;cur<=r;cur++){ 4PR&67|AH_
if(i1==mid+1) V?>&9D"m
data[cur]=temp[i2++]; k8SY=HP
else if(i2>r) F x$W3FIO]
data[cur]=temp[i1++]; YACx9K H
else if(temp[i1] data[cur]=temp[i1++]; 0LIXkF3^1
else |oX9SUl
data[cur]=temp[i2++]; O-pH~E
} |5q,%9_
} D vN0h(?
%U.x9UL
} @Jlsx0i}}
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改进后的归并排序: n:?a=xY
&uV|Ie8@q
package org.rut.util.algorithm.support; xc05GJ
%,@e- &>
import org.rut.util.algorithm.SortUtil; m(5LXHJnv
MCIuP`sC|
/** e5lJ)_o
* @author treeroot Jvj* z6/a
* @since 2006-2-2 Cv&>:k0V
* @version 1.0 9KT85t1#
*/ )(1tDQ`L>
public class ImprovedMergeSort implements SortUtil.Sort { n$>_2v
"]=XB0)
private static final int THRESHOLD = 10; EiDpy#f}
V' i@N
/* zxd<Cq>d
* (non-Javadoc) unnuSW#v=
* vDR> Q&/K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p]toDy-}
*/ B{S^t\T$
public void sort(int[] data) { xa !/.
int[] temp=new int[data.length]; B[f:T%
mergeSort(data,temp,0,data.length-1); 9\E];~"iP
} *$JS}Pax
UIZ9"Da
private void mergeSort(int[] data, int[] temp, int l, int r) { <~svy)Cz
int i, j, k; Xg;<?g?k
int mid = (l + r) / 2; y.gNjc
if (l == r) ;7JyL|2
return; us<dw@P7{
if ((mid - l) >= THRESHOLD) Y9%zo~]-W'
mergeSort(data, temp, l, mid); c"Q9ob
else V4W(>g
insertSort(data, l, mid - l + 1); WS1Y maV
if ((r - mid) > THRESHOLD) :g-vy9vb
mergeSort(data, temp, mid + 1, r); Y8fel2;
else !NKPy+v
insertSort(data, mid + 1, r - mid); OKj\>3
*Ct ^jU7
for (i = l; i <= mid; i++) { P`_Q-vu
temp = data; a+9_sUq
} \!0~$?_)P
for (j = 1; j <= r - mid; j++) { 3cNr~`7
temp[r - j + 1] = data[j + mid]; o_ixdnc
} <BBSC
int a = temp[l]; tqKX\N=5^
int b = temp[r]; iRv\:.aQ.
for (i = l, j = r, k = l; k <= r; k++) { +<f+kh2L
if (a < b) { y>r^ MQ
data[k] = temp[i++]; + eZn
a = temp; I=YZ!*f/`
} else { $UdFm8&
data[k] = temp[j--]; 7L]Y.7>
b = temp[j]; ^5FwYXAxi
} wqX!7rD/g)
} fnFIw=d
} 1=~##/at
0Yr-Q;O<f
/** OPv~1h<[
* @param data e4.G9(
* @param l H~0B5Hl!F
* @param i t-]~^s
*/ xp\6,Jyh
private void insertSort(int[] data, int start, int len) { =feVT2*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A{DE7gp!
} TF,([p*
} C3K")BO!
} 7|)K!
} WOYN% 0#
yoBR'$-=
堆排序： Uo|T6N
NnY+=#j7L
package org.rut.util.algorithm.support; O tR
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import org.rut.util.algorithm.SortUtil; 3nUC,T%
'W~6-c9y
/** -e*(+
* @author treeroot #/hXcF
* @since 2006-2-2 cA!o xti
* @version 1.0 '^,|8A2
*/ uC 2{ Mmy
public class HeapSort implements SortUtil.Sort{ 0qN+W&H
rp!{QG
/* (non-Javadoc) |W|RX3D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <VT|R~
*/ okbW. ~
public void sort(int[] data) { [R/'hH5
MaxHeap h=new MaxHeap(); !XF:.|
h.init(data); g'.(te |
for(int i=0;i h.remove(); -&np/tEu&
System.arraycopy(h.queue,1,data,0,data.length); ;7mE%1X
} N6!9QIu~i
^4a|gc
private static class MaxHeap{ h)X"<a++N
Q\2~^w1V
void init(int[] data){ OkQtM nq
this.queue=new int[data.length+1]; oUN;u*
for(int i=0;i queue[++size]=data; 1@^*tffL:
fixUp(size); kAAD&t;w
} kY~o3p<
} ;k,#o!>
IvB)d}p
private int size=0; 5VE9DTE
A_|X54}w&
private int[] queue; Twk,R. O
VyOpPIP
public int get() { 6"GHVFB
return queue[1]; tI+P&L"
} I@I-QiI
-1]8f
public void remove() { U#(#U0s*-
SortUtil.swap(queue,1,size--); %I%OHs
fixDown(1); \7*"M y*
} qW9~S0sl
file://fixdown B>e},!
private void fixDown(int k) { 4@Xd(F_d
int j; j\uPOn8k
while ((j = k << 1) <= size) { >s>{+6e
if (j < size %26amp;%26amp; queue[j] j++; Uc]sWcR
if (queue[k]>queue[j]) file://不用交换 `& ]H`KNa
break; OUtMel_
SortUtil.swap(queue,j,k); j55OG~)
k = j; 5_Oxl6#
} p4wx&VLi
} Q;2n
private void fixUp(int k) { *o#P)H
while (k > 1) { [^\HP]*Q{
int j = k >> 1; _4X3g%nXl
if (queue[j]>queue[k]) I8
break; !u=A9i!
SortUtil.swap(queue,j,k); ac/<N%
k = j; /jd.<r=_I
} 4cJka~
} 'a=QCO 0
xdrs!GV:
} KqzQLu
)'axJ
} ~x g#6%<=
f9?f!k
SortUtil： =(p]L
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package org.rut.util.algorithm; )L$)qfQ~x
>~rytg]f
import org.rut.util.algorithm.support.BubbleSort; A=\:b^\
import org.rut.util.algorithm.support.HeapSort; CdTE~O<)
import org.rut.util.algorithm.support.ImprovedMergeSort; &u9@FFBT8
import org.rut.util.algorithm.support.ImprovedQuickSort; n~?n+\.&a
import org.rut.util.algorithm.support.InsertSort; Aiqn6BX{
import org.rut.util.algorithm.support.MergeSort; G!5~`v
import org.rut.util.algorithm.support.QuickSort; ]Jx_bs~g
import org.rut.util.algorithm.support.SelectionSort; o@DlK`
import org.rut.util.algorithm.support.ShellSort; 5<h:kZ"S^g
>vfbXnN
/** u=PYm+q{
* @author treeroot 2D'$
* @since 2006-2-2 bt0Q6v5
* @version 1.0 ,];QzENw
*/ W$Op/
public class SortUtil { *dX 7
public final static int INSERT = 1; G q2@37U
public final static int BUBBLE = 2; i'uSu8$'*
public final static int SELECTION = 3; ^;.&=3N,+
public final static int SHELL = 4; \EQCR[7qu7
public final static int QUICK = 5; ;;7:l,vy
public final static int IMPROVED_QUICK = 6; d\j[O9W>
public final static int MERGE = 7; Tu_4kUCR!f
public final static int IMPROVED_MERGE = 8; ^y<8&ZFH
public final static int HEAP = 9; 6"u"B-cz
,?`Zrxe[
public static void sort(int[] data) { 3s$vaV~(a
sort(data, IMPROVED_QUICK); -=a,FDeR
} cxn*!TwDs
private static String[] name={ !9vq"J~hz"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C=<PYkt,L
}; W&;,7T8@
H.*aVb$
private static Sort[] impl=new Sort[]{ +VRM:&
new InsertSort(), 9]PMti
new BubbleSort(), T<K/bzB3z
new SelectionSort(), tQmuok4"d
new ShellSort(), xw~3x*{
new QuickSort(), GfL:0
new ImprovedQuickSort(), .[C@p`DZ
new MergeSort(), K)s{D]B
new ImprovedMergeSort(), p\ _&
new HeapSort() T!Z).PA#
}; o'Kl+gw4
0c$ ')`!m
public static String toString(int algorithm){ 8;"HM5+
return name[algorithm-1]; YzeNr*
} ID8u&:
U\x$@J
public static void sort(int[] data, int algorithm) { 6QG"~>v7'(
impl[algorithm-1].sort(data); 4-JyK%m,0
} W9/HM!
S$ Z?T
public static interface Sort { }ISc^W) t
public void sort(int[] data); =.ReM_.
} X}_Gk5q*
#-8%g{
public static void swap(int[] data, int i, int j) { "-:-!1;Ji
int temp = data; vhKHiw9L
data = data[j]; cE+Y#jB
data[j] = temp; IT:8k5(L5j
} ]jgMN7
} '))K' u