[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; -nC!kpo
} -$5nqaK?
int i1=l; ? Glkhf7(
int i2=mid+1; GbbD)
for(int cur=l;cur<=r;cur++){ e=EM07z
if(i1==mid+1) L9(!L$
data[cur]=temp[i2++]; NW@guhK.
else if(i2>r) .eM A*C~n
data[cur]=temp[i1++]; X4:SH>U!
else if(temp[i1] data[cur]=temp[i1++]; uOnyU+fZV
else +#0,2wR#
data[cur]=temp[i2++]; ttC+`0+H
} ~:lN("9OI
} }e0)=*;l
\j3XT}
} 7Ys\=W1
eXZH#K7S#
改进后的归并排序: IBe0?F #
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package org.rut.util.algorithm.support; 00(#_($
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import org.rut.util.algorithm.SortUtil; #u6ZCv7u
+b6kU{
/** '9#h^.
* @author treeroot \Dn an5H/
* @since 2006-2-2 NHq*&xy
* @version 1.0 5qx$=6PT
*/ [}!obbM
public class ImprovedMergeSort implements SortUtil.Sort { h>A}vI*:
c<j+"
private static final int THRESHOLD = 10; .jjvS
!aub@wH3
/* qT+:oMrTSm
* (non-Javadoc) \Z%V)ZRi=
* %["V "{ z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aw8q}:
*/ ia}V8i
public void sort(int[] data) { |qTS{qQh{L
int[] temp=new int[data.length]; 8q#Be1u<s2
mergeSort(data,temp,0,data.length-1); - Ado-'aaS
} 8st~ O
B\}B H
private void mergeSort(int[] data, int[] temp, int l, int r) { 5(sWV:_2
int i, j, k; gXI8$W>
int mid = (l + r) / 2; t=$Hv
if (l == r) ON/U0V:v
return; rq>OmMQ67
if ((mid - l) >= THRESHOLD) -{'WIGm
mergeSort(data, temp, l, mid); wX*F'r"z
else F-2&P:sjQ
insertSort(data, l, mid - l + 1); ' Zmslijf
if ((r - mid) > THRESHOLD) v&i,}p^M5
mergeSort(data, temp, mid + 1, r); T1Y_Jf*KJ
else l&1R`gcW
insertSort(data, mid + 1, r - mid); nofK(0TF
juc;]CHt'
for (i = l; i <= mid; i++) { 3m9ab"
temp = data; )dgooq
} -^%YrWgd?
for (j = 1; j <= r - mid; j++) { $"G=r(MW
temp[r - j + 1] = data[j + mid]; EZvf\s>LT
} qkbxa?&X
int a = temp[l]; )0W-S9e<
int b = temp[r]; ]aF!0Fln~
for (i = l, j = r, k = l; k <= r; k++) { 79JU
if (a < b) { f.&((z?rC
data[k] = temp[i++]; Pwh0Se5Z
a = temp; 7v^V]&&s
} else { ~)\E&c
data[k] = temp[j--]; 4q7hL
b = temp[j]; 4]$$ar)
} iCrLZ"$M
} ?H2{R:
} h (1 }g/
pZv>{=2hOS
/** zU1[+JJY"{
* @param data @s2<y@
* @param l >^fkHbgNQ
* @param i eQvdi|6
*/ $yA2c^QS
private void insertSort(int[] data, int start, int len) { !?~>f>js_l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >X"V
} atA:v3"
} 4dwG6-
} K^'NG!
} #I(Ho:b
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堆排序： *?GV(/Q
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package org.rut.util.algorithm.support; ^5yFb=2
lB Y"@N
import org.rut.util.algorithm.SortUtil; L~])?d
3\Ma)\>R\-
/** g,N"o72)
* @author treeroot 7u9!:}Tu
* @since 2006-2-2 Y79{v nlGk
* @version 1.0 X( H-U q*(
*/ b\l +S2
public class HeapSort implements SortUtil.Sort{ `Ko6;s#
rcWr0q
/* (non-Javadoc) Jm l4EW7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (\=iKE4#
*/ f(o1J|U{
public void sort(int[] data) { J|z>5Z
MaxHeap h=new MaxHeap(); GukS=rC9
h.init(data); +80yyn#
for(int i=0;i h.remove(); ]"Qm25`Qz
System.arraycopy(h.queue,1,data,0,data.length); 1|c\^;cTkt
} ,,-g*[/3
X-&U-S;
private static class MaxHeap{ *mgK^9<
|rDv!m
void init(int[] data){ 0Q1sJDa.
this.queue=new int[data.length+1]; </OZ,3J=
for(int i=0;i queue[++size]=data; i!!1^DMrw
fixUp(size); Nd"4*l;
} cF7efs8u
} ;P{HePs=)
_26~<gU8
private int size=0; itmdY!;<
)Bq~1M 2
private int[] queue; smM*HDK
C)r!;u)AZH
public int get() { }LaRa.3
return queue[1]; J,bE[52
} AJ*FQo.U
AIR\>.~"i*
public void remove() { Q'ok%9q!p
SortUtil.swap(queue,1,size--); xgi/,Nk '
fixDown(1); fA]b'8
} nM)q;9-ni
file://fixdown _FET$$>z N
private void fixDown(int k) { ;c-J)Ky
int j; Q@in?};
while ((j = k << 1) <= size) { 1Ue;hu'q:
if (j < size %26amp;%26amp; queue[j] j++; V*m@Rs!)2
if (queue[k]>queue[j]) file://不用交换 ?>_[hZ
break; WzC_M>_
SortUtil.swap(queue,j,k); IfH*saN7
k = j; BmRk|b
} @} 61D
} F .(zS(q
private void fixUp(int k) { ;eG,T-:
while (k > 1) { 0koC;(<n
int j = k >> 1; "Yo.]PU
if (queue[j]>queue[k]) pL{h1^O}
break; J1?)z+t9~
SortUtil.swap(queue,j,k); PN!NB.
k = j; lJfn3
} 8}&O7zO?
} MMMuT^X
<3wfY #;><
} f\ wP}c'
d{UyiZm\
} ^b{w\HZ
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SortUtil： 4&Q.6HkL
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package org.rut.util.algorithm; Pw^lp'dO
ZR~ *Yofy
import org.rut.util.algorithm.support.BubbleSort; wz-#kH5?
import org.rut.util.algorithm.support.HeapSort; HbRDa
import org.rut.util.algorithm.support.ImprovedMergeSort; p/4\O
import org.rut.util.algorithm.support.ImprovedQuickSort; kAF[K,GG
import org.rut.util.algorithm.support.InsertSort; e%(,)WlTaU
import org.rut.util.algorithm.support.MergeSort; |z!Y,zaX
import org.rut.util.algorithm.support.QuickSort; 3J2j5N:g
import org.rut.util.algorithm.support.SelectionSort; j0p'_|)(
import org.rut.util.algorithm.support.ShellSort; 6iiH+Nc
-/>SdR$D7
/** 88)F-St
* @author treeroot io[$QTY
* @since 2006-2-2 iUv#oX H
* @version 1.0 T9@W,0#
*/ &TmN^R>
public class SortUtil { #PzRhanX
public final static int INSERT = 1; p nS{W \Q
public final static int BUBBLE = 2; >AT{\W!N
public final static int SELECTION = 3; Fxu'(xa
public final static int SHELL = 4; IpX>G]"-C
public final static int QUICK = 5; ^6*2a(S&
public final static int IMPROVED_QUICK = 6; d66 GO];"
public final static int MERGE = 7; 73kF=*m
public final static int IMPROVED_MERGE = 8; <p<J;@
public final static int HEAP = 9; |fx*F}1
'n7)()"2
public static void sort(int[] data) { )Q_^f'4
sort(data, IMPROVED_QUICK); U2=PmS P
} t;7 tuq
private static String[] name={ v-;j44sB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p#VA-RSUQ|
}; N|n"JKw)
,4bqjkX5q
private static Sort[] impl=new Sort[]{ J2"n:
new InsertSort(), TG\3T%gH/s
new BubbleSort(), 0] 'Bd`e
new SelectionSort(), b<|l*\
new ShellSort(), f?_UT}n
new QuickSort(), &{):x
new ImprovedQuickSort(), Sga/i?!
new MergeSort(), nATEv2:G
new ImprovedMergeSort(), }uJH!@j
new HeapSort() !ejLqb
}; - J9K
'N?,UtG R
public static String toString(int algorithm){ >tfy\PY:
return name[algorithm-1]; %!5[3b'h
} i1qhe?5
IXp(Aeb
public static void sort(int[] data, int algorithm) { qVOlUH
impl[algorithm-1].sort(data); _raj b1!
} K&zp2V
K:!|xr(1d
public static interface Sort { `'Fz:i
public void sort(int[] data); A4lh`n5%
} -6(u09mb_
)z'LXy8
public static void swap(int[] data, int i, int j) { (nWi9(}J
int temp = data; A.aUWh
data = data[j]; E2M|b
data[j] = temp; @Sxb}XI!f
} i%m]<yElm
} 1l$c*STK