[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; ^*`hJ48u
} Y2HF
int i1=l; 1r'skmxq
int i2=mid+1; "'~55bG
for(int cur=l;cur<=r;cur++){ .gzNdSE
if(i1==mid+1) ZxLgV$U
data[cur]=temp[i2++]; .3M=|rE
else if(i2>r) E:!?A@Fy
data[cur]=temp[i1++]; C,HKao\
else if(temp[i1] data[cur]=temp[i1++]; [HLXWu3
else cba~
data[cur]=temp[i2++]; 6O>NDTd%
} -lAX-W0
} h`;w/+/Zr
%i6i.TF
} fIWOo >)D
}\?UmuolQ
改进后的归并排序: EPkmBru ^
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package org.rut.util.algorithm.support; Q!9AxM2K
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import org.rut.util.algorithm.SortUtil; T5$db-^
Y`.FSs
/** B}Qpqa=_c
* @author treeroot BUvE~l.,|
* @since 2006-2-2 $t}t'uJ
* @version 1.0 __O@w.
*/ w7+3?'L
public class ImprovedMergeSort implements SortUtil.Sort { sT ]JDC6
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private static final int THRESHOLD = 10; !,WO]Ov
gn4+$f~w
/* u?,M`w0'
* (non-Javadoc) OTwIR<_B+
* C3>&O?7J*7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qy|[V
*/ FX}kH]
public void sort(int[] data) { =Kqb V{!
int[] temp=new int[data.length]; <#HQU<
mergeSort(data,temp,0,data.length-1); ROqz$yY
} VI_8r5o
c%tb6@C
private void mergeSort(int[] data, int[] temp, int l, int r) { %s&l^&ux
int i, j, k; aGSix}b1P
int mid = (l + r) / 2; 8=\}#F
if (l == r) j%%& G$Tfu
return; I5Vp%mCY
if ((mid - l) >= THRESHOLD) 9 M>.9~
mergeSort(data, temp, l, mid); &![3{G"+>l
else ^V,?n@c!
insertSort(data, l, mid - l + 1); <MdIQ;I8
if ((r - mid) > THRESHOLD) oU"!"t
mergeSort(data, temp, mid + 1, r); ~FCkr&Ky3
else \7]0vG
insertSort(data, mid + 1, r - mid); ~$w9L998+
zp.-=)D4e
for (i = l; i <= mid; i++) { #O<,
temp = data; :Q]P=-Y8
} $DS|jnpV
for (j = 1; j <= r - mid; j++) { wX/0.aZ|
temp[r - j + 1] = data[j + mid]; .! 'SG6 q
} we?# Dui
int a = temp[l]; VCf/EkC
int b = temp[r]; b}<?& @
for (i = l, j = r, k = l; k <= r; k++) { yVZLZLm
if (a < b) { `|&#=hl~
data[k] = temp[i++]; 7F$G.LhMw
a = temp; 2;2FyKF(
} else { Iy[TEB
data[k] = temp[j--]; \%BII>VS
b = temp[j]; }o,-@R~
} \k 9EimT}
} <b>g^ `}?D
} z}.Q~4 f0D
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/** "WF@T
* @param data }+] l_!v*
* @param l .30eO_msK
* @param i 1buVV]*~
*/ tXXnHEz
private void insertSort(int[] data, int start, int len) { ]Y;5U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *TyLB&<t
} 2pQ29
} ^jYE4gHM
} Q h~
} K&'Vd@
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堆排序： ,::f? Gc7j
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package org.rut.util.algorithm.support; e|1.-P@
Ah:d2*SR4
import org.rut.util.algorithm.SortUtil; [ikW3 '99,
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/** [x[nTIg
* @author treeroot ;)Fc@OXN>
* @since 2006-2-2 W @ ?*~
* @version 1.0 Fswr @du
*/ %n B}Hq ;
public class HeapSort implements SortUtil.Sort{ hEhvA6f,
<rI8O;\H
/* (non-Javadoc) C.`!?CW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *N65B#
*/ r7FFZNs!
public void sort(int[] data) { \DMZ M
MaxHeap h=new MaxHeap(); bDtb"V8e
h.init(data); %LjhK,'h
for(int i=0;i h.remove(); \%/Y(YVm
System.arraycopy(h.queue,1,data,0,data.length); &"6%D|Z0
} +bdjZD3
L)"E_
private static class MaxHeap{ $97EeE:{M
q=x1:^rVH
void init(int[] data){ AFdBf6/"i
this.queue=new int[data.length+1]; 3]rd!Gp=*
for(int i=0;i queue[++size]=data; 9.>he+
fixUp(size); 4Ai#$SHLm
} Lj2Au_5
} 9v3%a3
0zc~!r~
private int size=0; <wTD}.n
*f-8egt-
private int[] queue; ]k)h<)nY
v43FU3
public int get() { (|dN6M-.K
return queue[1]; HDQH7Bs
} 8i~n;AhDs
vYNu=vnM
public void remove() { |2!cPf^8
SortUtil.swap(queue,1,size--); *\#?)q
fixDown(1); I><sK-3
} Qm@v}pD
file://fixdown \1nj=ca?
private void fixDown(int k) { I*4g ;1x
int j; fI }v}L^
while ((j = k << 1) <= size) { dQ-:]T (
if (j < size %26amp;%26amp; queue[j] j++; |Ye%HpTTv
if (queue[k]>queue[j]) file://不用交换 |5g1D^b]s^
break; o2_mcJ
SortUtil.swap(queue,j,k); "t&_!Rm
k = j; oi\e[qE
} ^3lEfI<pBm
} !Ct'H1J-
private void fixUp(int k) { 94'0X
while (k > 1) { D:#e;K
int j = k >> 1; ' }T6dS
if (queue[j]>queue[k]) wvz_)bN~A
break; cr>"LAi
SortUtil.swap(queue,j,k); R4AKp1Y
k = j; <2ymfL-q
} "yf#sEabV
} !b{7gUjyI
&BE'~G
} IRK(y*6
}0 b[/ZwQ
} ;oivG)hJl
V1 O]L66
SortUtil： U}:e-
Bs;.oK5!n@
package org.rut.util.algorithm; kpx2e2C|
j6#RV@ p`
import org.rut.util.algorithm.support.BubbleSort; LgJUMR8vUO
import org.rut.util.algorithm.support.HeapSort; %y[ t+)!E
import org.rut.util.algorithm.support.ImprovedMergeSort; ByivV2qd{
import org.rut.util.algorithm.support.ImprovedQuickSort; }gtkO&
import org.rut.util.algorithm.support.InsertSort; @f%q ,:
import org.rut.util.algorithm.support.MergeSort; @ $2xiE.[
import org.rut.util.algorithm.support.QuickSort; aP`V
import org.rut.util.algorithm.support.SelectionSort; A[Pz&\@
import org.rut.util.algorithm.support.ShellSort; Q|Go7MQZ@k
<~iA{sY)O
/** 'w`3( ':=
* @author treeroot &k@r23V7r
* @since 2006-2-2 |yYu!+U
* @version 1.0 2>h.K/pC
*/ n+H);Dg<8
public class SortUtil { o}6d[G>
public final static int INSERT = 1; VhX~sJ1%Gp
public final static int BUBBLE = 2; o\-:
public final static int SELECTION = 3; :FWo,fq?:{
public final static int SHELL = 4; Kn4x_9
public final static int QUICK = 5; c~v(bK
public final static int IMPROVED_QUICK = 6; egh_1Wg2a
public final static int MERGE = 7; gQlL0jAV
public final static int IMPROVED_MERGE = 8; "FH03 9
public final static int HEAP = 9; _su$]s
]`u_d}`
public static void sort(int[] data) { #9u2LK
sort(data, IMPROVED_QUICK); !fK9YW(Im
} gvy c(d
private static String[] name={ 6+ C7vG`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~spfQV~
}; ![hVTZ,hyZ
D&nVkZP>
private static Sort[] impl=new Sort[]{ |^T?5=&Kt
new InsertSort(), +/Qgl
new BubbleSort(), ?0hEd9TU
new SelectionSort(), 9MR,3/&N
new ShellSort(), jLCZ JSK
new QuickSort(), :}3;z'2]l
new ImprovedQuickSort(), [RFF&uy
new MergeSort(), \8iWcqJktN
new ImprovedMergeSort(), P,ud"F=r
new HeapSort() <L>$Y#wU
}; L_QJS2
Av"^uevfs
public static String toString(int algorithm){ > ?<C+ZHh
return name[algorithm-1]; WJF#+)P:Y
} k+`e0Jago
yp\sJc`
public static void sort(int[] data, int algorithm) { )Y 9JP@}T
impl[algorithm-1].sort(data); MrFi0G7u
} 5@< D6>6
Y=tx kN
public static interface Sort { U]W+ers
public void sort(int[] data); T Z_](%
} 7FvtWE*
ar[*!:!
public static void swap(int[] data, int i, int j) { TYN~c(
int temp = data; jw$[b=sa
data = data[j]; w//L2.
data[j] = temp; gbL!8Z1h
} 9Netnzv%
} 2}8xY:|@(U