[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; ./qbWr`L
} GeFu_7u!|
int i1=l; -IE=?23Do?
int i2=mid+1; MwE^.6xl{
for(int cur=l;cur<=r;cur++){ ?{]"UnyVE*
if(i1==mid+1) [1Q:
data[cur]=temp[i2++]; -Pp =)_O
else if(i2>r) f\u5=!kjN
data[cur]=temp[i1++]; M2Zk1Z
else if(temp[i1] data[cur]=temp[i1++]; -~NjZ=vPh
else 70F(`;
data[cur]=temp[i2++]; dF+R q|n{
} \R.Fmeko
} 4<btWbk5u*
m?y'Y`
} 5E!Wp[^
$_+.D`vx`
改进后的归并排序: $h|8z
c:u2a/Q?
package org.rut.util.algorithm.support; )YPut.
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import org.rut.util.algorithm.SortUtil; 7e/K YS+!s
l0BYv&tu
/** eMOnzW|h
* @author treeroot Y;1J`oT
* @since 2006-2-2 55V&[>|K5
* @version 1.0 =SK{|fBB
*/ "vF7b|I
public class ImprovedMergeSort implements SortUtil.Sort { ?UBhM,;XK
uuf+M-P
private static final int THRESHOLD = 10; PS/00F/Ak
Stk'|-z
/* Rf#t|MW*#
* (non-Javadoc) EViDMp"
* psM&r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7b hJt_`Q
*/ e$4$G<8;y
public void sort(int[] data) { ~IS3i'bh
int[] temp=new int[data.length]; m ol|E={si
mergeSort(data,temp,0,data.length-1); GcHZ&m4
} ^T_2s
cE7IHQ
private void mergeSort(int[] data, int[] temp, int l, int r) { mAuN* (
int i, j, k; ]oE:p
int mid = (l + r) / 2; 3sz?49tX
if (l == r) *K=Yrisz
return; >-4kO7.V
if ((mid - l) >= THRESHOLD) !~a1xI~s
mergeSort(data, temp, l, mid); RrRE$g
else ky{-NrK
insertSort(data, l, mid - l + 1); ?vocI
if ((r - mid) > THRESHOLD) XFrgnnt
mergeSort(data, temp, mid + 1, r); hgI;^ia
else PP!}w
insertSort(data, mid + 1, r - mid); &?#!%Ds
yUlYf#`H
for (i = l; i <= mid; i++) { zH1:kko
temp = data; )NCSO b
} &&sCaNb
for (j = 1; j <= r - mid; j++) { .+2@(r
temp[r - j + 1] = data[j + mid]; XE.Y?{,R$
} FX:'38-fk
int a = temp[l]; MP%pEUomev
int b = temp[r]; $S{]` +
for (i = l, j = r, k = l; k <= r; k++) { ^laf!kIP
if (a < b) { :Tn1]a)f6
data[k] = temp[i++]; _do(
a = temp; &Ez]pKjB
} else { n;0x\Q|S
data[k] = temp[j--]; q?2kD"%$
b = temp[j]; @Sd l~'"
} Fc.1)yh.
} _)F0oC {
} i}}}x
G,JK$j>*l
/** ^.; x
* @param data 8 !+eq5S3
* @param l aIW W[xZ
* @param i {fAj*,pzl
*/ Ceco^Mw
private void insertSort(int[] data, int start, int len) { 4>$weu^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :c^9\8S
} ^VAvQ(b!:i
} #Hyfjj
} 268H!'!\
} 3^J~ts{*
-+w^"RBV
堆排序： Bq)aA)gF
Bh*7uNM
package org.rut.util.algorithm.support; gBCO>nJws
qD?-&>dBWi
import org.rut.util.algorithm.SortUtil; Z2wgfP`
\4r?=5v*
/** 8!q$8]M
* @author treeroot Lp}>WCams
* @since 2006-2-2 mFu0$N6]H
* @version 1.0 FELTmQUV
*/ {Y#$
public class HeapSort implements SortUtil.Sort{ =9@t6
c _faW
/* (non-Javadoc) />E:}1}{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 39zwPoN>
*/ lqe71](sK8
public void sort(int[] data) { 5v@-.p
MaxHeap h=new MaxHeap(); WnLMa|e
h.init(data); n'-?CMH`
for(int i=0;i h.remove(); b08s610fk
System.arraycopy(h.queue,1,data,0,data.length); :-Al}7
} "2~%-;c
3]u[NR
private static class MaxHeap{ L1i:hgq0]
mtQlm5l
void init(int[] data){ 4v("qNw#
this.queue=new int[data.length+1]; _jr'A-M
for(int i=0;i queue[++size]=data; %Qc5_of
fixUp(size); {zf)im[.
} >TqMb8e_
} 861!p%y5
rIg5Wcd
private int size=0; M((]> *g
n2#Yw}7^,o
private int[] queue; I3wv6xZ2
KS6H`Mm}/
public int get() { UFLN/
return queue[1]; _ Db05:r@
} !PIpvx{aX
}wh sZ
public void remove() { Zoi\r
SortUtil.swap(queue,1,size--); 3Wl,T5}{
fixDown(1); ]U8VU
} U0Y;*_>4
file://fixdown =h<LlI^v
private void fixDown(int k) { 4CT _MAj
int j; WE hDep:
while ((j = k << 1) <= size) { aj71oki)
if (j < size %26amp;%26amp; queue[j] j++; m<DiYxK
if (queue[k]>queue[j]) file://不用交换 HaUfTQ8
break; O&Ws*k
SortUtil.swap(queue,j,k); covr0N)
k = j; *nPB+@f
} .|pyloL.
} JFvVRGWB
private void fixUp(int k) { 38[ko3
while (k > 1) { +@QN)ZwVy
int j = k >> 1; 45u\v2,C3
if (queue[j]>queue[k]) b"t<B2N
break; g@<E0 q&`$
SortUtil.swap(queue,j,k); )tRqt9Th*
k = j; #ZPU.NNT?
} <#hltPyh
} 4a&*?=GG
*7ggw[~
} ]7d~,<3R
(L{Kg U&{$
} e+!+(D
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SortUtil： }[[
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package org.rut.util.algorithm; ]$StbBP
{G+pI2^
import org.rut.util.algorithm.support.BubbleSort; rT2gX^Mj&
import org.rut.util.algorithm.support.HeapSort; d"1DE
import org.rut.util.algorithm.support.ImprovedMergeSort; .)7r /1o
import org.rut.util.algorithm.support.ImprovedQuickSort; nj (/It
import org.rut.util.algorithm.support.InsertSort; 6%p$C oR
import org.rut.util.algorithm.support.MergeSort; 98%M`WY
import org.rut.util.algorithm.support.QuickSort; ]y4(WG;:
import org.rut.util.algorithm.support.SelectionSort; H9x,C/r,
import org.rut.util.algorithm.support.ShellSort; QJcaOXyMS
Y\.ds%G
/** 3H_mR j9th
* @author treeroot >d`XR"_e
* @since 2006-2-2 nPW?DbH +
* @version 1.0 JH%^FF2
*/ t3#My2=
public class SortUtil { 0g-bApxz*&
public final static int INSERT = 1; b.`<T"y
public final static int BUBBLE = 2; JQ>GKu~
public final static int SELECTION = 3; qfO=_z ES
public final static int SHELL = 4; Zy}Qc")Z
public final static int QUICK = 5; WcCJ;z:S?k
public final static int IMPROVED_QUICK = 6; x}g5
public final static int MERGE = 7; K/2k/\Jk[_
public final static int IMPROVED_MERGE = 8; ')d&:K*M
public final static int HEAP = 9; -/#VD&MJO=
7j>NUx=j3
public static void sort(int[] data) { gaK m`#
sort(data, IMPROVED_QUICK); <Rs#y:
} pJ` M5pF
private static String[] name={ g>lJZD@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L|y4u;-Q
}; K3jPTAw=#
r'kUU]j9
private static Sort[] impl=new Sort[]{ iqzl(9o.D
new InsertSort(), Qy)+YhE
new BubbleSort(), dLtSa\2Hn
new SelectionSort(), TZ`@pDi
new ShellSort(), *]ROUk@K=
new QuickSort(), 3:">]LMi
new ImprovedQuickSort(), KGMX >t'
new MergeSort(), IETdL{`~
new ImprovedMergeSort(), O*hd@2hd
new HeapSort() e&Z\hZBb
}; 4H7 3a5f
?4X8l@fR
public static String toString(int algorithm){ HT]v S}s
return name[algorithm-1]; |G2hm8 Y
} @/S6P-4
=j)y.x(
public static void sort(int[] data, int algorithm) { hjuzVOE|W
impl[algorithm-1].sort(data); u N%RB$G
} %5N;SRtv
[C GFzxz$
public static interface Sort { TY|5O! <
public void sort(int[] data); 9n$0OH /q
} #n=b*.
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public static void swap(int[] data, int i, int j) { /PP\L](
int temp = data; TBfX1v|Z)
data = data[j]; 5:jbd:o
data[j] = temp; ~<M/<%o2*
} Yp8~wdm
} ; Q-f6)+&