[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; pPcTrN'
} |/09<F:L[
int i1=l; x$1]M DAGb
int i2=mid+1; fb{``,nO
for(int cur=l;cur<=r;cur++){ RLbKD>
if(i1==mid+1) m=}B,']O
data[cur]=temp[i2++]; :?/cPg'D
else if(i2>r) 8-BflejX
data[cur]=temp[i1++]; gW-V=LV (
else if(temp[i1] data[cur]=temp[i1++]; &;+-?k|
else KVD8YfF
data[cur]=temp[i2++]; QA<Jr5Ys
} D@Vt^_
} >sK!F$
f>W-
} U-IpH+E
.v$D13L(o
改进后的归并排序: N'g>MBdI
c2&q*]?l;
package org.rut.util.algorithm.support; <)u`~$n2
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import org.rut.util.algorithm.SortUtil; b]x4o#t
W0l,cOOZJ
/** WN01h=1J_
* @author treeroot poToeagZ~Q
* @since 2006-2-2 5\e9@1Rc
* @version 1.0 "tB;^jhRs
*/ OU8Lldt
public class ImprovedMergeSort implements SortUtil.Sort { Wzw7tLY._
,QcF|~n
private static final int THRESHOLD = 10; 8>0e*jC
+xrr?g
/* f ` R/ i
* (non-Javadoc) <4P4u*/o
* B5X(ykaX~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f6p-s y>
*/ &Rvm>TC=
public void sort(int[] data) { 1XD,uoxB
int[] temp=new int[data.length]; a{R%#e\n
mergeSort(data,temp,0,data.length-1); P%#<I}0C
} EJsM(iG]~M
^~3SSLS4"
private void mergeSort(int[] data, int[] temp, int l, int r) { a>GyO&+Dkg
int i, j, k; 4|CtRF<L
int mid = (l + r) / 2; EL(nDv
if (l == r) 4scNSeW
return; mGJasn
if ((mid - l) >= THRESHOLD) i(>4wK!!
mergeSort(data, temp, l, mid); ;*:Pw?'
else R'C2o]
insertSort(data, l, mid - l + 1); prTw'~(B
if ((r - mid) > THRESHOLD) FLGk?.x$\
mergeSort(data, temp, mid + 1, r); %O!v"Xh
else ,M^P!
insertSort(data, mid + 1, r - mid); 8C67{^`::
vSi.txV2
for (i = l; i <= mid; i++) { 5 N#3a0)
temp = data; cVv;Jn
} p$PKa.Y3
for (j = 1; j <= r - mid; j++) { X)7x<?DAy
temp[r - j + 1] = data[j + mid]; 0l-Ef1
} JV]^zW
int a = temp[l]; OH">b6>\
int b = temp[r]; ?XA2&
for (i = l, j = r, k = l; k <= r; k++) { . r[Hu40p
if (a < b) { +f@U6Vv
data[k] = temp[i++]; rEv$+pP
a = temp; (X?%^^e!
} else { 4}4Pyjh
data[k] = temp[j--]; A29gz:F(
b = temp[j]; |j#C|V%kV
} 1 D<_N
} J"=vE=
} _OuWB"
Kfh|
/** :'~Y
* @param data f;1K5Y
* @param l @I_8T$N=
* @param i =8; {\
*/ 9983aFam
private void insertSort(int[] data, int start, int len) { ?e,pN,4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >hk=VyU;
} )u/yF*:n
} 6^%68N1k
} dIRm q+d^
} Qj.l:9%
4KH45|;3
堆排序： ~%SH3$
C4~;yhz
package org.rut.util.algorithm.support; }Ub6eXf(2
XgLL!5`
import org.rut.util.algorithm.SortUtil; gG-BVl"59
1@QZnF5[
/** dt`{!lts'
* @author treeroot @+ BrgZv`
* @since 2006-2-2 ?q;Fp
* @version 1.0 SRrw0&ts
*/ @@8J6*y
public class HeapSort implements SortUtil.Sort{ #m{UrTC
z#]Jv!~EPE
/* (non-Javadoc) ;S57w1PbVA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &:,dJ
*/ jF=gr$
public void sort(int[] data) { 1DvR[Lx%
MaxHeap h=new MaxHeap(); p' +
h.init(data); ds?v'|
for(int i=0;i h.remove(); lJE93rXU
System.arraycopy(h.queue,1,data,0,data.length); 59O?_F9
} Bc6|n :;u
}RwSp!}C
private static class MaxHeap{ S%yd5<%_
3>R#zJf
void init(int[] data){ %=/)
this.queue=new int[data.length+1]; ~Uxsn@nLr
for(int i=0;i queue[++size]=data; uoXAQ6k
fixUp(size); L7VG`h;
} \>7^f 3m
} {|1Y:&M?
.8y3O]
private int size=0; F@<CsgKB-
ad:&$
private int[] queue; 49w=XJ
J,AR5@)1
public int get() { _c,'>aH=
return queue[1]; +=.W<b
} `.x Fiyc
A@sZ14+f
public void remove() { 4Qo]nre!
SortUtil.swap(queue,1,size--); XI9js{p
fixDown(1); uwjGDw
} `kU/NKq
file://fixdown \U[{z&]~
private void fixDown(int k) { =9"W@n[>W
int j; T)Y=zIQ1]7
while ((j = k << 1) <= size) { sfOHarww
if (j < size %26amp;%26amp; queue[j] j++; D;_ MPN[
if (queue[k]>queue[j]) file://不用交换 G=A,9@+c
break; T`Mf]s)*
SortUtil.swap(queue,j,k); JXu$ew>q
k = j; ;~\MZYs3m
} SL;9Q[
} DBCK2PlJ
private void fixUp(int k) { Sp^9&^
while (k > 1) { "V$Bnz\n
int j = k >> 1; w*|7!iM
if (queue[j]>queue[k]) {WPobP"
break; l?Fb ='#
SortUtil.swap(queue,j,k); @)-$kk*
k = j; y^}6!>Ou:
} 5<ux6,E1{
} j'BMAn ?
##EYH1P]
} 7 <Q5;J&;
)I$q5%q8
} w);6K[+;
]- 4QNc=
SortUtil： NsJ(`zk:
Ldl5zc
package org.rut.util.algorithm; y!!E\b=
E Kz'&Gu
import org.rut.util.algorithm.support.BubbleSort; d\FJFMW*9
import org.rut.util.algorithm.support.HeapSort; !Z5[QNVaV
import org.rut.util.algorithm.support.ImprovedMergeSort; h<SQL97N
import org.rut.util.algorithm.support.ImprovedQuickSort; Ko/ I#)
import org.rut.util.algorithm.support.InsertSort; ]sGHG^I6
import org.rut.util.algorithm.support.MergeSort; H03jDM8Q
import org.rut.util.algorithm.support.QuickSort; &ZX{R#[L
import org.rut.util.algorithm.support.SelectionSort; %B)6$!x
import org.rut.util.algorithm.support.ShellSort; IrWD%/$H
L[20m(6?
/** NbGV1q']
* @author treeroot |R#"Th6mH!
* @since 2006-2-2 n Ml%'[u
* @version 1.0 mK [0L
*/ 0#YX=vjX7
public class SortUtil { $LLA,?;!
public final static int INSERT = 1; t6A:ZmG_
public final static int BUBBLE = 2; K%Rj8J7|u?
public final static int SELECTION = 3; SY^dWLf
public final static int SHELL = 4; rJ!{/3e
public final static int QUICK = 5; NM6Teu_
public final static int IMPROVED_QUICK = 6; U=o"32n+
public final static int MERGE = 7; +5&wOgx
public final static int IMPROVED_MERGE = 8; -M1YE
public final static int HEAP = 9; P7x =
MiRdX#+Y
public static void sort(int[] data) { x"CZ]p&m
sort(data, IMPROVED_QUICK); o)[2@fRC(
} }oKG}wgY
private static String[] name={ 3t0[^cY8=z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QEu=-7@>
}; !grVR157P
yin'vgQ
private static Sort[] impl=new Sort[]{ Cc, `}SP
new InsertSort(), %T[^D&9$,
new BubbleSort(), =Odv8yhn
new SelectionSort(), WwUv5GZTW
new ShellSort(), C{q:_M;
new QuickSort(), v,\R,{0
new ImprovedQuickSort(), +\{&2a?
new MergeSort(), 1& '8Y
new ImprovedMergeSort(), WMBm6?54
new HeapSort() @mBX~ ?=Z3
}; -Z?Vd!H:
bQZ*r{g
public static String toString(int algorithm){ QZ?=M@|f
return name[algorithm-1]; W.1As{
} 2AVa(
?^EXTU85`"
public static void sort(int[] data, int algorithm) { f5GdZ_
impl[algorithm-1].sort(data); >Z;jY*
} Y&^P"Dw
1 `7<2w
public static interface Sort { 8l"O(B'#Z
public void sort(int[] data); C(id=F
} $\"9<o|h
-dO'~all
public static void swap(int[] data, int i, int j) { N*@aDM07
int temp = data; d.2mT?`#
data = data[j]; `W-&0|%Ta
data[j] = temp; )Y8",Ig
} ZJjTzEV%^B
} hHPs&EA.p