[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; {D",ao
} SE'|||B
int i1=l; L>1y[ Q
int i2=mid+1; v@GhwL
for(int cur=l;cur<=r;cur++){ )h 6w@TF
if(i1==mid+1) L)\<7
data[cur]=temp[i2++]; !idVF!xG
else if(i2>r) 3b0|7@_E
data[cur]=temp[i1++]; H.>EO&#|p
else if(temp[i1] data[cur]=temp[i1++]; Ad-5Znc5
else O%>*=h`P
data[cur]=temp[i2++]; ke;=Vg|
} h x5M)8#+
} j}/).O
=8`KGeP$
} W/t,7lPFb
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改进后的归并排序: .xT{Rz
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package org.rut.util.algorithm.support; 4OJD_
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import org.rut.util.algorithm.SortUtil; =X5w=(&
XY? Cl
/** Owu?ND
* @author treeroot ;P juO
* @since 2006-2-2 0',buJncV
* @version 1.0 Z}vDP^rf
*/ U*yOe*>
public class ImprovedMergeSort implements SortUtil.Sort { S!$S'{f<
U<sGj~"#
private static final int THRESHOLD = 10; l/nBin&YGv
tl~ZuS/
/* _e>N3fT
* (non-Javadoc) #7'k'(
* ??.aLeF&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pRE^; 4}z
*/ JtMl/h
public void sort(int[] data) { DOFW"SpE
int[] temp=new int[data.length]; $")Gd@aR
mergeSort(data,temp,0,data.length-1); V;CRs\aYf
} K2n#;fY %
F[jqJzCz
private void mergeSort(int[] data, int[] temp, int l, int r) { v9 /37AU
int i, j, k; $?z}yx$
int mid = (l + r) / 2; EJ<L,QH3
if (l == r) c1FSQ m81
return; >vXJ9\
if ((mid - l) >= THRESHOLD) h/:LC 7
mergeSort(data, temp, l, mid); T@P~A)>yo
else <zTz/Hk`
insertSort(data, l, mid - l + 1); kxEq_FX
if ((r - mid) > THRESHOLD) ^q& Rl\
mergeSort(data, temp, mid + 1, r); N+ ]O#Js?
else qHyOaKMd
insertSort(data, mid + 1, r - mid); zx:;0Z:S6>
lg )xQV
for (i = l; i <= mid; i++) { $gYGnh_,Q
temp = data; 8tjWVo
} 5$>buYF
for (j = 1; j <= r - mid; j++) { *>[q*SF
temp[r - j + 1] = data[j + mid]; seAEv0YWz
} WnOYU9;%
int a = temp[l]; Wql=PqF
int b = temp[r]; jp~Tlomp
for (i = l, j = r, k = l; k <= r; k++) { 9+<A7PM1T
if (a < b) { `S?_=JIX
data[k] = temp[i++]; iKaS7lWH
a = temp; =2rdbq6R
} else { nI(w7qhub
data[k] = temp[j--]; [K4k7$
b = temp[j]; :TKx>~`
} tp!eF"v=
} yD!GgnW
} zd$iDi($
{`)oxzR
/** OaoHN& "
* @param data 5oB#{h
* @param l b 5K"lPr
* @param i !,b&e
*/ -cn`D2RP
private void insertSort(int[] data, int start, int len) { wNFx1u^/)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d%q&[<'jf
} "5N$u(: b
} V5 9Vf[i|
} \7$"i5
} Sc}Rs
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堆排序： w_QWTD0
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package org.rut.util.algorithm.support; U =g&c `
n1R{[\ >1
import org.rut.util.algorithm.SortUtil; (otD4VR_
?f:0GE7
/** ,]9p&xu
* @author treeroot g86^Z%c(k
* @since 2006-2-2 p>T
* @version 1.0 Y~#.otBL&
*/ Z%I 'sWOd
public class HeapSort implements SortUtil.Sort{ EQHCw<e
+^rt48${ y
/* (non-Javadoc) Ne1W!0YLK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {[{jlG4H
*/ 6HVX4Z#VH
public void sort(int[] data) { E(*CEW.V*
MaxHeap h=new MaxHeap(); +j8-l-o
h.init(data); (J(SwL|
for(int i=0;i h.remove(); oHV!>K_D
System.arraycopy(h.queue,1,data,0,data.length); ,n>K$
} Ogh,
^O"o-3dte
private static class MaxHeap{ f{(D+7e}
ue!4By8T
void init(int[] data){ HMKogGTTo
this.queue=new int[data.length+1]; uF D
for(int i=0;i queue[++size]=data; S\k(0Sv9D
fixUp(size); 73ABop
} 4/2@^\?i)
} G*zhy!P
i>pUTT _[
private int size=0; 1n>AN.nI
+' .o
private int[] queue; ExOSHKU,e
I]91{dq
public int get() { qvJQbo[.9P
return queue[1]; ]4\6_J&
} Fa X3@Sd!
ORIXcj]
public void remove() { &?9~e>.OS
SortUtil.swap(queue,1,size--); sA,2gbW
fixDown(1); `2G%&R,k"D
} 5J6~]J
file://fixdown RAxp2uif
private void fixDown(int k) { U)('}u=b
int j; *OY Nx4k
while ((j = k << 1) <= size) { W)odaab7
if (j < size %26amp;%26amp; queue[j] j++; !qs3fe<uh"
if (queue[k]>queue[j]) file://不用交换 1#vi]CX
break; q9$K.=_5
SortUtil.swap(queue,j,k); OI^qX;#Kd
k = j; u$(XZ;Jg
} j3'SM#X
} CEI.*Iywu
private void fixUp(int k) { MeO2 cy!5q
while (k > 1) { 6k ]+DbT
int j = k >> 1; Rw!_j!
if (queue[j]>queue[k]) d!4:nvKx
break; DC'L-]#<
SortUtil.swap(queue,j,k); 9u_D@A"aC`
k = j; G4n-}R&'
} ebf/cCh
} F||oSJrI
!z+'mF?V+X
} -&LF`V&3w
uNvdlY]
} 8iUKG
KzZRFEA_
SortUtil： ByjgM`
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package org.rut.util.algorithm; \~>7n'd ]
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import org.rut.util.algorithm.support.BubbleSort; `M,Gsy1h
import org.rut.util.algorithm.support.HeapSort; >ti)m >f
import org.rut.util.algorithm.support.ImprovedMergeSort; (U|WP%IM'
import org.rut.util.algorithm.support.ImprovedQuickSort; Ap<j;s4`
import org.rut.util.algorithm.support.InsertSort; Ce@"+k+w
import org.rut.util.algorithm.support.MergeSort; poS=8mN8;
import org.rut.util.algorithm.support.QuickSort; ;fm> \f
import org.rut.util.algorithm.support.SelectionSort; m]ALW0
import org.rut.util.algorithm.support.ShellSort; W@vCMy!
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/** zIc_'Z,b
* @author treeroot EzXi*/
* @since 2006-2-2 "'I|#dKoG
* @version 1.0 rCdTn+O2
*/ ,y[w`Q\
public class SortUtil { Tl-Ix&37
public final static int INSERT = 1; qo:t"x^
public final static int BUBBLE = 2; 7k#0EhN1>
public final static int SELECTION = 3; XlxM.;i0H
public final static int SHELL = 4; LP//\E_]
public final static int QUICK = 5; =5 $BR<'
public final static int IMPROVED_QUICK = 6; 3 E!F8GZ
public final static int MERGE = 7; a)M3t
public final static int IMPROVED_MERGE = 8; ujeN|W
public final static int HEAP = 9; d{c06(#_
#9]O92t2UV
public static void sort(int[] data) { <*db%{
sort(data, IMPROVED_QUICK); `s_k+ g
} HurF4IsHk
private static String[] name={ nMH:7[x3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O?qM=W
}; 8AmB0W>e
6JE_rAab
private static Sort[] impl=new Sort[]{ E-HK=D&W/
new InsertSort(), &bCk`]j:
new BubbleSort(), 1<pb=H
new SelectionSort(), (iu IeJ^Z
new ShellSort(), 'M%uw85
new QuickSort(), 9&OhCrxW-
new ImprovedQuickSort(), Y]+KsiOL
new MergeSort(), -;&-b>b
new ImprovedMergeSort(), _5v]69C#
new HeapSort() Jr,**,wA
}; Qa,$_,E
jFwJ1W;?-
public static String toString(int algorithm){ vk|xYDD
return name[algorithm-1]; ;% l0Ml>
} _?;74VWA
fI-f Gx
public static void sort(int[] data, int algorithm) { <d$t*vnq
impl[algorithm-1].sort(data); C&RZdh,$
} pw=o}-P{
O`0\f8/.?
public static interface Sort { OBnvY2)Ri
public void sort(int[] data); uB+:sX-L
} \-{2E
@eN,m {b
public static void swap(int[] data, int i, int j) { @6{F4
int temp = data; G$6mtw6[M
data = data[j]; }n?D#Pk,
data[j] = temp; {6HgKI
} Fz@U\\94z
} )S|&3\