[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; _yxe2[TD
} f`u5\!}=!
int i1=l; nXM9Px!
int i2=mid+1; lNh=>DPu
for(int cur=l;cur<=r;cur++){ M=\d_O#;Z
if(i1==mid+1) 3)C6OF>7
data[cur]=temp[i2++]; nz&b5Xb2
else if(i2>r) xyS2_Q
data[cur]=temp[i1++]; 8V=HyF#
else if(temp[i1] data[cur]=temp[i1++]; lrmt)BLoh
else f>s#Ngvc
data[cur]=temp[i2++]; KMpDlit
} np`gcj#
} ;Z!~A"~$>
u]1-h6
} AF*ni~
*C3uMiz
改进后的归并排序: oz\{9Lwc
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package org.rut.util.algorithm.support; A{i][1N
U9@t?j_#X{
import org.rut.util.algorithm.SortUtil; Lem\UD$D`
5S|}:~7T
/** (b`4&sQ<
* @author treeroot |i}+t
* @since 2006-2-2 ++T "+p
* @version 1.0 q#Yg0w~
*/ H;TOPtt2
public class ImprovedMergeSort implements SortUtil.Sort { 33{;[/4
qXP1Q3
private static final int THRESHOLD = 10; HC9vc,Fp
M]6w^\4j9
/* w L/p.@
* (non-Javadoc) k Z+q
* @H3s2|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =9DhO7I'
*/ uS: A4tN
public void sort(int[] data) { 1kvPiV=X>
int[] temp=new int[data.length]; dt-Qu},8-
mergeSort(data,temp,0,data.length-1); 0^<Skm27"
} ~!3t8Hx6
z&C{8aQ'
private void mergeSort(int[] data, int[] temp, int l, int r) { <?>I\
int i, j, k; 3D?IG\3
int mid = (l + r) / 2; :Bx+WW&P.i
if (l == r) dDv{9D,
return; O:`GL1{ve?
if ((mid - l) >= THRESHOLD) RQj`9F
mergeSort(data, temp, l, mid); xVsa,EX b
else LT,iS)dY+
insertSort(data, l, mid - l + 1); *tTP8ZCQ[
if ((r - mid) > THRESHOLD) `G"|MM>P
mergeSort(data, temp, mid + 1, r); (B>yaM#5
else p~Yy"Ec;p
insertSort(data, mid + 1, r - mid); v{mv*`~nA\
Hl^aUp.c
for (i = l; i <= mid; i++) { P|unUW(P
temp = data; "xe7Dl
} 4cXAT9
for (j = 1; j <= r - mid; j++) { b[J-ja.
temp[r - j + 1] = data[j + mid]; }|Hw0zP.
} 8Ehy9<
int a = temp[l]; G?Qe"4 .
int b = temp[r]; L?3VyBE
for (i = l, j = r, k = l; k <= r; k++) { [ -9)T
if (a < b) { V9+xL 1U#
data[k] = temp[i++]; =Q/w%8G
a = temp; W;3 R;
} else { Qag|nLoT
data[k] = temp[j--]; ;x!,g5q"q
b = temp[j]; Z-4K?;g'k
} X;s3y{ku
} t/v@vJ`vSH
} ~=`f]IL
=,&u_>Dp
/** G]L0eV
* @param data ) >>u|#@z
* @param l ^#a#<8Jz
* @param i VRtbHam
*/ &%|xc{i
private void insertSort(int[] data, int start, int len) { i;[h 9=\/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R7E]*:0}
} f0-RhR
} &q," !:L]
} >QYh}Z-/%
} r\A@&5#q
kbfuvJ>
堆排序： [b7it2`dl
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package org.rut.util.algorithm.support; Tjd&^m
[=XZza.z
import org.rut.util.algorithm.SortUtil; v;)BVv
<ldid]o #
/** c+szU}(f6(
* @author treeroot EHH|4;P6
* @since 2006-2-2 IT8B~I\OY
* @version 1.0 QT`fix{
*/ pu\b`3C(
public class HeapSort implements SortUtil.Sort{ #D!$~h&i
20 jrv'f
/* (non-Javadoc) S 3{Dn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C$KaT3I
*/ N+*(Y5TU
public void sort(int[] data) { G[|3^O>P
MaxHeap h=new MaxHeap(); !d:tIu{)
h.init(data); Sp<hai
for(int i=0;i h.remove(); 1zdYBb6;j
System.arraycopy(h.queue,1,data,0,data.length); \1=T sU&^
} ,$HHaoog
,3G$`
private static class MaxHeap{ Zr\2BOcc.l
>=4sPF)
void init(int[] data){ am]3 "V>
this.queue=new int[data.length+1]; Hm.X}HO0L
for(int i=0;i queue[++size]=data; R!sNg
fixUp(size); n (OjjRm
} y.jS{r".
} QH& %mr.S
qsI{ b<n
private int size=0; |!$ Q<-]f
Sv.KI{;v$
private int[] queue; 2;&mkcK'
G!AICcP^
public int get() { =Ov9Kf
return queue[1]; 0v;ve
} R|/Wz/$1A
#uQrJh1o8
public void remove() { l>A\V)
SortUtil.swap(queue,1,size--); 5kK=S
fixDown(1); cYsR0#
} @[n2dmj
file://fixdown gBMta+<fE~
private void fixDown(int k) { 7^c2e*S
int j; kJ/+IGV^v
while ((j = k << 1) <= size) { A$/KP\0Y2
if (j < size %26amp;%26amp; queue[j] j++; ]a8eDy
if (queue[k]>queue[j]) file://不用交换 6(:)otz
break; *hV4[=
SortUtil.swap(queue,j,k); 1oB$MQoc
k = j; |p;4dL
} fwRGT|":B
} ozVpfs
private void fixUp(int k) { *^n^nnCwp
while (k > 1) { P~&O4['<
int j = k >> 1; BeAk21xb
if (queue[j]>queue[k]) SO7(K5H,
break; ggMUdlU
SortUtil.swap(queue,j,k); &Y 'z?N
k = j; ,&0Z]*
} `$H7KIG
} Xu6jHJ@x
Xz8$Xz,O
} <|otZJ'2r
! &y
} JAN|aCzD
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SortUtil： m{VL\ g)
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package org.rut.util.algorithm; !5NGlqEF#
S 9WawI
import org.rut.util.algorithm.support.BubbleSort; v<j2L"bj
import org.rut.util.algorithm.support.HeapSort; )#C_mB$-#
import org.rut.util.algorithm.support.ImprovedMergeSort; S45'j(S=
import org.rut.util.algorithm.support.ImprovedQuickSort; :#qUMiu$
import org.rut.util.algorithm.support.InsertSort; r|M'TA~:
import org.rut.util.algorithm.support.MergeSort; ohtT O]\
import org.rut.util.algorithm.support.QuickSort; q{/*n]K
import org.rut.util.algorithm.support.SelectionSort; gEE9/\>%-
import org.rut.util.algorithm.support.ShellSort; ,dOMW+{
vXc!Zg~
/** T{ok +$w2
* @author treeroot av$
* @since 2006-2-2 t`uc3ta"9
* @version 1.0 wtq,`'B
*/ V):`&@
public class SortUtil { R3cg2H
public final static int INSERT = 1; +9TV:T
public final static int BUBBLE = 2; CDJ$hu
public final static int SELECTION = 3; Il|GCj*N
public final static int SHELL = 4; ^[0"vtb
public final static int QUICK = 5; 8*vFdoE_oO
public final static int IMPROVED_QUICK = 6; STw oYn
public final static int MERGE = 7; bea|?lK
public final static int IMPROVED_MERGE = 8; t~q?lT
public final static int HEAP = 9; )TM!ms+K
$%B5$+
public static void sort(int[] data) { kw3+>{\
sort(data, IMPROVED_QUICK); aJa.U^1{
} !f@XDW&R
private static String[] name={ Trpgx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )x)gHY8;
}; % ^e@`0L
3<+z46`?
private static Sort[] impl=new Sort[]{ SGQDro=l
new InsertSort(), Jlz9E|*qV
new BubbleSort(), ]/a g*F
new SelectionSort(), ,?I(/jI
new ShellSort(), uO"y`$C$_
new QuickSort(), /Ad6+cY
new ImprovedQuickSort(), v3~FR,Kl
new MergeSort(), \PzN XQ$
new ImprovedMergeSort(), ~C0Pu.{o
new HeapSort() L -YNz0A
}; L(;.n>/
E3bwyK!s
public static String toString(int algorithm){ Q]^Yi1PbS
return name[algorithm-1]; loLKm]yV
} }Iip+URG
UPR/XQ
public static void sort(int[] data, int algorithm) { /;7ID41
impl[algorithm-1].sort(data); ]?M)NRk%S
} .5]{M\aA
4'` C1a
public static interface Sort { X'jr|s^s
public void sort(int[] data); }{A?PHV5
} j"i#R1T
\x(.d.l/
public static void swap(int[] data, int i, int j) { UP?D@ogl<
int temp = data; &lUNy L
data = data[j]; RNvQ
data[j] = temp; D@:"f?K>
} t|<FA#
} q#jEv-j.