[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; u@+^lRGFh
} pN)>c,
int i1=l; .)1u0 (?
int i2=mid+1; {}gL*2:EW$
for(int cur=l;cur<=r;cur++){ *IF~ab2
if(i1==mid+1) EiDpy#f}
data[cur]=temp[i2++]; V' i@N
else if(i2>r) <h<_''+
data[cur]=temp[i1++]; !+YSc&R_fW
else if(temp[i1] data[cur]=temp[i1++]; vDR> Q&/K
else W>,D$
data[cur]=temp[i2++]; 2$2@?]|?
} 31%3&B:Ts
} l Dwq[ I]w
f{\[+>
} *$JS}Pax
Q&PEO%/D
改进后的归并排序: ;Yg/y
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package org.rut.util.algorithm.support; hu}uc&N)iE
&t'P>6)
import org.rut.util.algorithm.SortUtil; ymR AQVv
)U0I|dx
/** 5l(@p7_+
* @author treeroot ~X'hRNFx~
* @since 2006-2-2 X*bOE}
* @version 1.0 i\4dd)p-
*/ 9`@}KnvB?
public class ImprovedMergeSort implements SortUtil.Sort { @)z?i
e;"%h%'
private static final int THRESHOLD = 10; p}K+4z
jCg4$),b
/* _?bF;R
* (non-Javadoc) EU Oa8Z
* YW8Odm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8)b*q\O'
*/ )sK_k U{\
public void sort(int[] data) { SpEu>9g&
int[] temp=new int[data.length]; =^zOM6E1ZF
mergeSort(data,temp,0,data.length-1); tqKX\N=5^
} iRv\:.aQ.
xG'F
private void mergeSort(int[] data, int[] temp, int l, int r) { y>r^ MQ
int i, j, k; + eZn
int mid = (l + r) / 2; JxRn)D
if (l == r) sd*NY
return; jT-tsQ .,
if ((mid - l) >= THRESHOLD) i^4i]+
mergeSort(data, temp, l, mid); 6HpiG`
else wc}4:~
insertSort(data, l, mid - l + 1); 1=~##/at
if ((r - mid) > THRESHOLD) #,!/Cnqis
mergeSort(data, temp, mid + 1, r); OPv~1h<[
else xP'"!d4^i
insertSort(data, mid + 1, r - mid); =RlAOgJ
gA2]kZg
for (i = l; i <= mid; i++) { )Oj{x0{\Q
temp = data; !\\1#:*_W
} CzmB76zy.
for (j = 1; j <= r - mid; j++) { "T>;wyGW
temp[r - j + 1] = data[j + mid]; d#I; e
} 8Urj;KkD
int a = temp[l]; S;nlC
int b = temp[r]; _o>?\:A
for (i = l, j = r, k = l; k <= r; k++) { T@r%~z
if (a < b) { QKt{XB6Y
data[k] = temp[i++]; Cg^1(dBd[9
a = temp; dQNW1-s
} else { 1%N[DA^<\
data[k] = temp[j--]; jF{\=&fU
b = temp[j]; QGXR<Y
} -}H EV#ev
} =~k#<q1^
} iR'Pc3
j[fY.>yt&
/** dp'k$el
* @param data xK_0@6
* @param l .V l
* @param i TF@k{_f
*/ _Oc\hW
private void insertSort(int[] data, int start, int len) { su~J:~q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nYnv.5
} X@:@1+U
} xJ\>;$CY
} 14h0$7
} D<bHRtP
l9{.~]V
堆排序： |vh{Kb@
;n/04z
package org.rut.util.algorithm.support; )zo:Bo .<
L:UPS&)
import org.rut.util.algorithm.SortUtil; Pbakw81!~
K5\;'.9M
/** /)XN^Jwa;m
* @author treeroot 2nB{oF-Z
* @since 2006-2-2 H+VjY MvK
* @version 1.0 z?C&,mv
*/ 5oOFl
public class HeapSort implements SortUtil.Sort{ l}9E0^AS
Yj*!t1qm
/* (non-Javadoc) BPypjS0?8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a]?o"{{+
*/ 'w`9lIax
public void sort(int[] data) { T<u QhPMw
MaxHeap h=new MaxHeap(); 1u_< 1X3
h.init(data); "pQ)5/e
for(int i=0;i h.remove(); F{ sPQf'
System.arraycopy(h.queue,1,data,0,data.length); Uc]sWcR
} `& ]H`KNa
OUtMel_
private static class MaxHeap{ ~s) `y2Y
<USr$
void init(int[] data){ z_t%n<OvK
this.queue=new int[data.length+1]; >8w=Vlp
for(int i=0;i queue[++size]=data; GFYHt!&[\
fixUp(size); UiN6-{v<2
} 91}kBj
} h@D!/PS
PKX Tj6hj)
private int size=0; l1"*
y-@{
private int[] queue; m+pFU?<|
|j!U/n.%w
public int get() { $6*6%T5}
return queue[1]; x^6b$>1
} Q=F4ZrNqD
^wb$wtL('
public void remove() { w72\'
SortUtil.swap(queue,1,size--); k\}\>&Zqu
fixDown(1); n4DKLAl
} ITBa ^P
file://fixdown ?;CMsO*q
private void fixDown(int k) { 7D\:i1~
int j; !2]'S=Y
while ((j = k << 1) <= size) { })5I/
if (j < size %26amp;%26amp; queue[j] j++; 7tU=5@M9D
if (queue[k]>queue[j]) file://不用交换 sf'+;
break; ,qK3 3Bn
SortUtil.swap(queue,j,k); unAu8k^
k = j; 'EkuCL
} >1NE6T
} 1p COLC%1
private void fixUp(int k) { "uG@gV
while (k > 1) { p JM&R<i:
int j = k >> 1; `(lD]o{,s
if (queue[j]>queue[k]) fzW!-
break; 9wpV} .(
SortUtil.swap(queue,j,k); U$wD'v3pw
k = j; t}f,j^`e
} <g{d>j
} CP6xyXOlPB
^;.&=3N,+
} \EQCR[7qu7
i5Dq'wp
} ]O+W+h{]
b' fcWp0
SortUtil： Vae=Yg=fw
:a'[4w
package org.rut.util.algorithm; Ae_:Kc6
ExZ|_7^<
import org.rut.util.algorithm.support.BubbleSort; !9vq"J~hz"
import org.rut.util.algorithm.support.HeapSort; C=<PYkt,L
import org.rut.util.algorithm.support.ImprovedMergeSort; W&;,7T8@
import org.rut.util.algorithm.support.ImprovedQuickSort; 9?4:},FRmE
import org.rut.util.algorithm.support.InsertSort; ,w$:=;i
import org.rut.util.algorithm.support.MergeSort; 2rG$.cGN"
import org.rut.util.algorithm.support.QuickSort; X.J$ 5b
import org.rut.util.algorithm.support.SelectionSort; I|vfxf
import org.rut.util.algorithm.support.ShellSort; 7s}Eq~
GfL:0
/** .[C@p`DZ
* @author treeroot ,]_<8@R
* @since 2006-2-2 p\ _&
* @version 1.0 T!Z).PA#
*/ o'Kl+gw4
public class SortUtil { -^&NwLEv=
public final static int INSERT = 1; HAdDr!/`
public final static int BUBBLE = 2; V~"-\@
public final static int SELECTION = 3; }^zsN`
public final static int SHELL = 4; #B!<gA$/
public final static int QUICK = 5; tlpTq\;
public final static int IMPROVED_QUICK = 6; JbXd9AMh2
public final static int MERGE = 7; ^H~g7&f9?N
public final static int IMPROVED_MERGE = 8; gfly?)VnF
public final static int HEAP = 9; c,FZ{O@
0artR~*}
public static void sort(int[] data) { g&?{^4t]
sort(data, IMPROVED_QUICK); l$g \t]
} =a!_H=+4
private static String[] name={ Oe"nNvu/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (svKq(X
}; .r\|9 *j<
/xw}]Fa5
private static Sort[] impl=new Sort[]{ 9|qzFmE#
new InsertSort(), rIQ%X`Y
new BubbleSort(), D/bF
new SelectionSort(), ,qT+Vqpr{
new ShellSort(), f yhBfA:u
new QuickSort(), [SU;U['7
new ImprovedQuickSort(), 8\Kpc;zb
new MergeSort(), n'qWS/0U=
new ImprovedMergeSort(), BKk+<#Ti
new HeapSort() vX<^x2~9(
}; G?<uw RV
,j e
public static String toString(int algorithm){ f:KZP;/[c
return name[algorithm-1]; aXh~w<5F
} )8*}-z
\"1%>O*
public static void sort(int[] data, int algorithm) { @cu#rWiG
impl[algorithm-1].sort(data); \/F*JPhy
} AfvIzsT0
\%|%C
public static interface Sort { sMgRpem;
public void sort(int[] data); O 4'/C]B2
} ky@ZEp=
N<^)tR8+
public static void swap(int[] data, int i, int j) { {iYrC m[_
int temp = data; V-kx=M"k
data = data[j]; a7n`(}?Y
data[j] = temp; 7[ZoUWx
} vE&K!k`
} t_w2J=2