[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; {#-I;I:
} qfRsp rRI"
int i1=l; 2)_Zz~P^f
int i2=mid+1; BKd03s=
for(int cur=l;cur<=r;cur++){ X\\c=[#8-
if(i1==mid+1) |f9fq~'1e
data[cur]=temp[i2++]; 2P&KU%D)0s
else if(i2>r) <oFZFlY@
data[cur]=temp[i1++]; =f FTi1]/h
else if(temp[i1] data[cur]=temp[i1++]; E=G"_ ^hCE
else $2tPqZ>
data[cur]=temp[i2++]; I.C,y\
} -SyQ`V)T7N
} tc.`P]R
W3AtO
} BWtGeaW/sr
qFqK.u
改进后的归并排序: &OK[n1M
1rnbUE
package org.rut.util.algorithm.support; 2u B66i
6[\b]I\Q
import org.rut.util.algorithm.SortUtil; Xs,[Z2_iq
{*#}"/:8K
/** )GbVgYkk
* @author treeroot AeQIsrAHE
* @since 2006-2-2 A>0wqT
* @version 1.0 $w:7$:k
*/ &:]ej6V'[
public class ImprovedMergeSort implements SortUtil.Sort { =Gl6~lJ{_
UKfC!YR2J8
private static final int THRESHOLD = 10; dV~d60jOF
y{Fq'w!ap
/* d9@Pze">e
* (non-Javadoc) <1^\,cI2
* ;+86q"&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mk:k0,z
*/ APne!
public void sort(int[] data) { D@-'<0=
int[] temp=new int[data.length]; n]K`ofjl^
mergeSort(data,temp,0,data.length-1); \A~r~
} 0$saDmED
r~<I5MZY
private void mergeSort(int[] data, int[] temp, int l, int r) { &Fw8V=Pw
int i, j, k; [ X7LV
int mid = (l + r) / 2; |._9;T-Yde
if (l == r) cH==OM7&-
return; KG2ij~v
if ((mid - l) >= THRESHOLD) GnCO{"n
mergeSort(data, temp, l, mid); ;usv/8
else LTof$4s
insertSort(data, l, mid - l + 1); ].A>ORS/
if ((r - mid) > THRESHOLD) != @U~X|cu
mergeSort(data, temp, mid + 1, r); qGAbh
else D'nO
insertSort(data, mid + 1, r - mid); [@"7qKd1
k+D32]b@
for (i = l; i <= mid; i++) { "s?!1v(v
temp = data; r.JY88"
} $y2"Q,n+
for (j = 1; j <= r - mid; j++) { G$P|F6
temp[r - j + 1] = data[j + mid]; nVSuvq|S
} xJ0Q8A
int a = temp[l]; l^LYSZg'R8
int b = temp[r]; |=\w b^l+
for (i = l, j = r, k = l; k <= r; k++) { oo+nqc`,O
if (a < b) { ZysZS%
data[k] = temp[i++]; H@j D%
a = temp; W-72&\7
} else { BAJEn6f?
data[k] = temp[j--]; r+#!]wNPe
b = temp[j]; y*f5_
} Q?1' JF!G
} S4'\=w#
} |Z"5zL10
r@|{mQOxa
/** CO)BF%?B
* @param data w^rINPAS
* @param l h8ND=(
* @param i !BQ:R(w
*/ )/B' ODa
private void insertSort(int[] data, int start, int len) { hwon^?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Msk^H7
} |=xK-;qs
} g_T[m*
} *.+Eg$'~V
} dx<KZR$!V
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堆排序： [6$n
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package org.rut.util.algorithm.support; Z>O2
t7(#Cuv-
import org.rut.util.algorithm.SortUtil; O<H5W|cM
<<ze84E
/** K~U5jpc
* @author treeroot I_h8)W
* @since 2006-2-2 cTq}H_hC
* @version 1.0 Zy<gA >
*/ s={jwI50
public class HeapSort implements SortUtil.Sort{ @@])B#
3ZAPcpB2
/* (non-Javadoc) ^hMJNy&R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X}-)io
*/ <8'-azpJ6<
public void sort(int[] data) { t+2!"Jr
MaxHeap h=new MaxHeap(); Vk#wJ-
h.init(data); (,i&pgVZ
for(int i=0;i h.remove(); O6P{+xj$
System.arraycopy(h.queue,1,data,0,data.length); ZQ0R3=52r
} )S,Rx
Kgb3>r
private static class MaxHeap{ e*zt;SR
O< \i{4}}
void init(int[] data){ K<_bG<tm_
this.queue=new int[data.length+1]; @N?u{|R:d
for(int i=0;i queue[++size]=data; 1Re5)Y:i
fixUp(size); [VsTyqV a
} ~S$\ PG4
} LH"CIL2
~zcHpxO^W
private int size=0; d/m.VnW
IwR/4LYI
private int[] queue; #y?iUv
=Eh~ wm
public int get() { Kc%GxD`
return queue[1]; $v6`5;#u
} #cZ<[K q6
[5iBXOmpS=
public void remove() { ;mi+[`E
SortUtil.swap(queue,1,size--); Oh|KbM*vS
fixDown(1); |#)S`Ua1
} 1U/ dc.x5
file://fixdown &2,0?ra2&
private void fixDown(int k) { xv+47.?N
int j; -q8R'?z[
while ((j = k << 1) <= size) { y|e@zf
if (j < size %26amp;%26amp; queue[j] j++; gaIN]9wLm
if (queue[k]>queue[j]) file://不用交换 wB~5&:]jr
break; {]F};_
SortUtil.swap(queue,j,k); .[qm>j,
k = j; 9(CY"Tc3
} C.& R,$
} @gn}J'
private void fixUp(int k) { fBi6% #
while (k > 1) { X<j(AAHE
int j = k >> 1; pSzO)j
if (queue[j]>queue[k]) z|^+uL
break; E76#xsyhF
SortUtil.swap(queue,j,k); -D4"uoN.
k = j; 6^'BhHP
} &azy1.i~
} _@gd9Fi7J
|_Tp:][mf
} 9CxFj)#5F
X}W4dpU,
} *Bse3%-v
_!} L\E~
SortUtil： !97k
TrEo5H;
package org.rut.util.algorithm; uE]kv
t@Bl3Nt{
import org.rut.util.algorithm.support.BubbleSort; bS!4vc1`2
import org.rut.util.algorithm.support.HeapSort; )5O E~}>
import org.rut.util.algorithm.support.ImprovedMergeSort; J$/'nL<{^
import org.rut.util.algorithm.support.ImprovedQuickSort; 3 cb$g
import org.rut.util.algorithm.support.InsertSort; ?q%&"
import org.rut.util.algorithm.support.MergeSort; 3Aqw)B'"_
import org.rut.util.algorithm.support.QuickSort; j-R9=vB2
import org.rut.util.algorithm.support.SelectionSort; p:/#nmC<
import org.rut.util.algorithm.support.ShellSort; &Oxf^x["]
3om_Z/k
/** ZITic&>W
* @author treeroot ^tFbg+.
* @since 2006-2-2 c=52*&
* @version 1.0 .:nV^+)
*/ sb3k? q
public class SortUtil { L2jjkyX]
public final static int INSERT = 1; l0&Y",vy
public final static int BUBBLE = 2; GlPd)m`
public final static int SELECTION = 3; xX5EhVR
public final static int SHELL = 4; )v+R+3<
public final static int QUICK = 5; &>T7]])
public final static int IMPROVED_QUICK = 6; dYn<L/#
public final static int MERGE = 7; kW!`vQm~
public final static int IMPROVED_MERGE = 8; O2n[`9*
public final static int HEAP = 9; ]((Ix,ggP
_Z>I"m
public static void sort(int[] data) { {j!jm5
sort(data, IMPROVED_QUICK); ?e. Ge0&
} 1>pFUf|cV
private static String[] name={ 43HZ)3!me
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &l0-0T>
}; FB\lUO)U\c
us0{y7(p
private static Sort[] impl=new Sort[]{ 0&@pD`K e
new InsertSort(), l5*sCp*Z
new BubbleSort(), 6HK dBW$/
new SelectionSort(), =rB=! ;
new ShellSort(), R'Uw17I
new QuickSort(), Ne=o+ $.(
new ImprovedQuickSort(), R=ipK63
new MergeSort(), 4L`<xX;:{
new ImprovedMergeSort(), v[*&@aW0n
new HeapSort() MB:VACCr
}; 2l YA% n
U^@8ebv
public static String toString(int algorithm){ E;>BcPt5
return name[algorithm-1]; O9_S"\8]@
} 7F;dLd'
{f12&t
public static void sort(int[] data, int algorithm) { qVidubsW
impl[algorithm-1].sort(data); Shm$>\~=
} ?vd_8C2B
y. A]un1
public static interface Sort { $UX^$gG
public void sort(int[] data); pT;{05
} .vm.g=-q
(0cL! N;;
public static void swap(int[] data, int i, int j) { bY>JLRQJ-
int temp = data; c@ea ;Cv
data = data[j]; pp!>:%
data[j] = temp; 1/l;4~p7'
} {Iu9%uR>@
} <8SRt-Cr