[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; @}!?}QU
} {v=[~H>bt
int i1=l; dnwzf=+>e
int i2=mid+1; V(0Y
for(int cur=l;cur<=r;cur++){ `RE>gX
if(i1==mid+1) G9QvIXRi
data[cur]=temp[i2++]; H*3u]Ebh
else if(i2>r) Q#ksf h!D
data[cur]=temp[i1++]; PHIc7*_
else if(temp[i1] data[cur]=temp[i1++]; *?uUP
else ;'V[8`Z@
data[cur]=temp[i2++]; MMET^SO
} i>CR{q
} Ti0kfjhX7
!.O[@A\.-
} K,|3?CjS
J>#yA0QD2
改进后的归并排序: c?c\6*O
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package org.rut.util.algorithm.support; <kwF<J
u^E0u^
import org.rut.util.algorithm.SortUtil; ELMz~vp
E)jd>"
/** Bd=K40Z:
* @author treeroot $t"QLsk0
* @since 2006-2-2 mr#.uhd.z
* @version 1.0 VbJE zl
*/ ^z,B}Nz
public class ImprovedMergeSort implements SortUtil.Sort { S["r @<
ip{b*@K
private static final int THRESHOLD = 10; CW8YNJ'
AU%Yr6
/* 5? Y(FhnIC
* (non-Javadoc) /@&o%I3h
* 8L/XZ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eS ?9}TG|
*/ upk_;ae
public void sort(int[] data) { jR\!2!
int[] temp=new int[data.length]; 40].:9VG
mergeSort(data,temp,0,data.length-1); T>#~.4A0
} BOM0QskLf
1)ij*L8k
private void mergeSort(int[] data, int[] temp, int l, int r) { tlvZy+Blv
int i, j, k; E2cZk6~m{
int mid = (l + r) / 2; 4K`b?{){+a
if (l == r) 3y2L!&'z
return; _<c}iZv@
if ((mid - l) >= THRESHOLD) .:Wp9M
mergeSort(data, temp, l, mid); `<<9A\Y-f
else >>C S8
insertSort(data, l, mid - l + 1); zlQBBm;fE
if ((r - mid) > THRESHOLD) 3%o}3.P,:@
mergeSort(data, temp, mid + 1, r); Lp|n)29+du
else y,n.(?!*
insertSort(data, mid + 1, r - mid); xpuTh"ED
!~'D;Jh
for (i = l; i <= mid; i++) { 5i'?oXL
temp = data; v<l]K$5J&
} \21Gg%W5AE
for (j = 1; j <= r - mid; j++) { LqJV
temp[r - j + 1] = data[j + mid]; NhF"%
} f61vE
int a = temp[l]; /.A"HGAk
int b = temp[r]; ZXiJ5BZ
for (i = l, j = r, k = l; k <= r; k++) { ' \>k7?@
if (a < b) { *tR'K#:&g!
data[k] = temp[i++]; ?/sn"~"
a = temp; >zfx2wh\a
} else { A8S9HXL
data[k] = temp[j--]; 3syA$0TZt
b = temp[j]; a;~< iB;3"
} /#eS3`48
} "66#F
} J[S!<\_!
r#w7qEtD
/** Z]k@pR !
* @param data 4JO16
* @param l eBmHb\
* @param i xc`O\z_)
*/ M80O;0N%A
private void insertSort(int[] data, int start, int len) { 7aPA+gA/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zO$r
} 'T7 3V
} vAeVQ~
} ~Ij/vyB_
} J#3[,~
MMD=4;X
堆排序： M5_t#[ [
i 2uSPV!Tf
package org.rut.util.algorithm.support; P;'ZdZ(SLu
u:l<NWF^
import org.rut.util.algorithm.SortUtil; RwrRN+&s\
(./Iq#@S
/** 8+Gwv SDU
* @author treeroot >T0`( #Lm
* @since 2006-2-2 #(+V&<K
* @version 1.0 -*J!Ws(9
*/ e?O$`lf
public class HeapSort implements SortUtil.Sort{ TA:#K
-3b_}by
/* (non-Javadoc) j:2F97
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >/%XP_q%`e
*/ -GB,g=Dk
public void sort(int[] data) { i;|I;5tC
MaxHeap h=new MaxHeap(); a gL@A
h.init(data); \ZE=WvnhZ
for(int i=0;i h.remove(); >$ro\/
System.arraycopy(h.queue,1,data,0,data.length); ,TB$D]u8
} M&9urOa`
`P:[.hRu
private static class MaxHeap{ 2<w vO 9
%AWc`D
void init(int[] data){ mZM7 4!4X
this.queue=new int[data.length+1]; ]TcQGW@'
for(int i=0;i queue[++size]=data; [io|qLr}\
fixUp(size); -m ;n}ECg
} 4)'U!jSb
} itc\wn
%S$$*|_G
private int size=0; 44YKS>Cq
Xi\c>eALO
private int[] queue; GWWaH+F[h
H(M{hfa|
public int get() { m"'`$/_
return queue[1]; qss)5a/x.
} YGc:84S
)_4()#3
public void remove() { MtoOIkQ
SortUtil.swap(queue,1,size--); %@TC- xx
fixDown(1); =2} kiLKO
} vr2PCG[~
file://fixdown F=#V/ #ia
private void fixDown(int k) { |pq9i)e&
int j; wg\p&avvb
while ((j = k << 1) <= size) { \ptjnwC^O
if (j < size %26amp;%26amp; queue[j] j++; SN\c2^#
if (queue[k]>queue[j]) file://不用交换 0O*kC43E_
break; "Y- WY,H
SortUtil.swap(queue,j,k); qn |~YXn
k = j; cKoW5e|u
} `QW=<Le?
} 5nsoWqnE8
private void fixUp(int k) { >&7^yXS
while (k > 1) { ?`O^;f
int j = k >> 1; _./s[{ek
if (queue[j]>queue[k]) {I?)ODx7qC
break; HXZ,"S
SortUtil.swap(queue,j,k); O.xtY@'"
k = j; /Bh*MH
} ?k;htJcGv
} &CN(PZv
$p$p C/:%
} iJmzVR+
fz2}M:u
} 8gt&*;'}*D
n5IQKYrg
SortUtil： /m 7~-~$V
2\gIjXX"
package org.rut.util.algorithm; $z 5kA9
;_E|I=%'E
import org.rut.util.algorithm.support.BubbleSort; 8VO];+N
import org.rut.util.algorithm.support.HeapSort; P*VZ$bUe5@
import org.rut.util.algorithm.support.ImprovedMergeSort; zZ<*
import org.rut.util.algorithm.support.ImprovedQuickSort; ~vM99hW
import org.rut.util.algorithm.support.InsertSort; Np ru
import org.rut.util.algorithm.support.MergeSort; >'.: Acn
import org.rut.util.algorithm.support.QuickSort; rzLW@k
import org.rut.util.algorithm.support.SelectionSort; zEukEA^9`
import org.rut.util.algorithm.support.ShellSort; N>]J$[j
#k`gm)|
/** qc\D=3#Yp
* @author treeroot O7uCTB+
* @since 2006-2-2 uI%7jA~@
* @version 1.0 ('Uj|m}9
*/ t*)mX2R,
public class SortUtil { 257$ !
public final static int INSERT = 1; 7\R"RH-
public final static int BUBBLE = 2; .q[}e);)
public final static int SELECTION = 3; V{A`?Jl6{
public final static int SHELL = 4; Qf}.=(
public final static int QUICK = 5; 8Gnf_lkI
public final static int IMPROVED_QUICK = 6; \[^! ys
public final static int MERGE = 7; =6Gn? /{
public final static int IMPROVED_MERGE = 8; & 0WQF
public final static int HEAP = 9; V'MY+#
yBIX<P)vE'
public static void sort(int[] data) { yTZo4c"
sort(data, IMPROVED_QUICK); cF8X
} Q[K)Yd
private static String[] name={ K:~tZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mZPvG
}; j0a=v}j3
>!a- "
private static Sort[] impl=new Sort[]{ RtpV08s\
new InsertSort(), w-LENdw
new BubbleSort(), N@}h
new SelectionSort(), ; D/6e6
new ShellSort(), dl6U]v=
new QuickSort(), dt+r P%
new ImprovedQuickSort(), hh*('n>[
new MergeSort(), %9Z0\ a)[
new ImprovedMergeSort(), kw]?/s`
new HeapSort() Z[ (d7
}; 6yMZ2%
_*Z3,*~"X
public static String toString(int algorithm){ e6J^J&`|4
return name[algorithm-1]; 7Zdg314
} !jSgpIp
()O&O+R|)
public static void sort(int[] data, int algorithm) { \]5I atli
impl[algorithm-1].sort(data); ugE!EEy[^
} ubOXEkZ8N
2{vAs
public static interface Sort { [Z#Sj=z
public void sort(int[] data); 5\#I4\
} ~QxW^DGa7]
B%MdJD>
public static void swap(int[] data, int i, int j) { pq&[cA_w
int temp = data; K%x]:|,>M
data = data[j]; IM/xBP
data[j] = temp; J@6j^U
} tH.L_< N
} QeuM',6R