[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; Y::I_6[eV
} KNZN2N)wR
int i1=l; ` e~nn
int i2=mid+1; ]l.qp5eQ
for(int cur=l;cur<=r;cur++){ t:?8I9d
if(i1==mid+1) Mc#w:UH[
data[cur]=temp[i2++]; .tny"a&
else if(i2>r) 4LfD{-_uW
data[cur]=temp[i1++]; NrrnG]#p1
else if(temp[i1] data[cur]=temp[i1++]; ;#F7Fp*U
else lm 1Mz
data[cur]=temp[i2++]; o;D[F
} /v^1/i
} Aa#WhF
9Nkr=/I"P
} ^Cm9[1p
2kS]:4)T
改进后的归并排序: 5u=(zg
:UrS@W^B
package org.rut.util.algorithm.support; j(*ZPo>oD
D:yj#&I
import org.rut.util.algorithm.SortUtil; /y.+N`_
OE4hGxG
/** 1dgy-$H~
* @author treeroot 6zfi\(fop
* @since 2006-2-2 t"]+}]O
* @version 1.0 t|ih{0
*/ _3lci
public class ImprovedMergeSort implements SortUtil.Sort { |*w}bT(PfR
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private static final int THRESHOLD = 10; uR:@7n
@},25"x)
/* Q{~WWv
* (non-Javadoc) vA r fsgk
* =d{B.BP(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1oSrhUTy
*/ $%3"@$
public void sort(int[] data) { :s}6a23
int[] temp=new int[data.length]; v9t26>{~
mergeSort(data,temp,0,data.length-1); [1\k'5rp
} eA$wJ$*
#EO@<>I
private void mergeSort(int[] data, int[] temp, int l, int r) { A=z+@b6
int i, j, k; #nv =x&g
int mid = (l + r) / 2; ("7rjQjRz
if (l == r) ^D=1%@l?#
return; >4.K>U?0FC
if ((mid - l) >= THRESHOLD) el;eyGa
mergeSort(data, temp, l, mid); #Pf?.NrTn
else %}nNwuJ
insertSort(data, l, mid - l + 1); A=(<g";m
if ((r - mid) > THRESHOLD) 'fqX^v5n
mergeSort(data, temp, mid + 1, r); *x;&fyR
else +@ FM~q
insertSort(data, mid + 1, r - mid); ]hPu
/ehmy(zL
for (i = l; i <= mid; i++) { ^4\hZ
temp = data; c8^M::NI
} $@[`v0y*
for (j = 1; j <= r - mid; j++) { c89+}]mGq
temp[r - j + 1] = data[j + mid]; xDU{I0M
} 4NY}=e5
int a = temp[l]; DhVF^=x$
int b = temp[r]; R@+%~"Z
for (i = l, j = r, k = l; k <= r; k++) { X &z|im'd
if (a < b) { /mM#nS
data[k] = temp[i++]; o<Esh;;*nm
a = temp; -Dx_:k|k
} else { \x,q(npHi
data[k] = temp[j--]; T;f`ND2fY
b = temp[j]; 94>EA/+Ek
} i1OF@~?
} E=-ed9({:
} cQ?eL,z
7j ]d{lD
/** +4N7 _Y
* @param data mip2=7M|C
* @param l r\+0J`
* @param i 6dCS Gb
*/ /3VSO"kcZ
private void insertSort(int[] data, int start, int len) { mO6rj=L^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1^x"P#u
} #s\HiO$BT
} C3XB'CL6
} [%);N\o2Y
} P0B`H7D
Q=,6W:j
堆排序： $y0[AB|V
k"kGQk4
package org.rut.util.algorithm.support; %|tDb
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import org.rut.util.algorithm.SortUtil; eVXlQO
2~*J<iO&l
/** xksd&X:
* @author treeroot . paA0j
* @since 2006-2-2 1kd\Fq^z$
* @version 1.0 ]WsQ=
*/ ]~Su
public class HeapSort implements SortUtil.Sort{ Aa.eu=@I
*t)Y@=k3>
/* (non-Javadoc) J@Qt(rRxi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SWX[|sjdB
*/ ?=bqya"Y
public void sort(int[] data) { va>u1S<lO
MaxHeap h=new MaxHeap(); 6/%dD DU
h.init(data); [eWZ^Eh"I
for(int i=0;i h.remove(); VIXY?Ua
System.arraycopy(h.queue,1,data,0,data.length); e={X{5z0
} xzZ2?zWi
Tuk:: .jD
private static class MaxHeap{ qy9RYIfZ
rwJCVkF
void init(int[] data){ lR[]A
this.queue=new int[data.length+1]; K~C6dy
for(int i=0;i queue[++size]=data; P1r)n{;
fixUp(size); vky@L!&,
} D<16m<b
} ,esryFRG
K4G43P5q`
private int size=0; kE8\\}B7
2ncD,@ij
private int[] queue; rT&rv^>f
0Z m^6T
public int get() { gXNlnh%?S
return queue[1]; \W,,@-
} >l0y ss)I
`/"rs@
public void remove() { 17 k9h?s*
SortUtil.swap(queue,1,size--); ccdP}|9e
fixDown(1); :Zs i5>MT
} 3.t j%+
file://fixdown k%|Sl>{Ir
private void fixDown(int k) { a_GnN\kX^Z
int j; ]g3RVA%\l
while ((j = k << 1) <= size) { 5 $vUdDTg
if (j < size %26amp;%26amp; queue[j] j++; 6SJryf~w
if (queue[k]>queue[j]) file://不用交换 @(m+B\
break; @X|Mguq5
SortUtil.swap(queue,j,k); u!B6';XY
k = j; KE~l#=S
} $+P6R`K
} 4kNiS^h
private void fixUp(int k) { MJzY|
while (k > 1) { L&I8lG
int j = k >> 1; I*SrKZb
if (queue[j]>queue[k]) :rBPgrt
break; m\0Xh*
SortUtil.swap(queue,j,k); tbH`VD"u
k = j; zc`gm~@
} -J06H&/k
} d :a*;F
RCL}bE
} -](NMRqfN
9i=HZ\s3
} 6w"_sK?
Ue=Je~Ri;9
SortUtil： +=V[7^K;
vGX}zzto
package org.rut.util.algorithm; $$5E+UDOs
Ik\n/EE
import org.rut.util.algorithm.support.BubbleSort; +D@+j
import org.rut.util.algorithm.support.HeapSort; S.I3m-
import org.rut.util.algorithm.support.ImprovedMergeSort; mnG\qsKNLK
import org.rut.util.algorithm.support.ImprovedQuickSort; BQ;F`!Hx?
import org.rut.util.algorithm.support.InsertSort; >, 9R :X(
import org.rut.util.algorithm.support.MergeSort; tQ@%3`
import org.rut.util.algorithm.support.QuickSort; _oILZ,
import org.rut.util.algorithm.support.SelectionSort; r'bPSu,
import org.rut.util.algorithm.support.ShellSort; UqA<rW
)Z=S'm k4_
/** 7eR%zNDa
* @author treeroot q;)+O#CR
* @since 2006-2-2 pnpx`u;
* @version 1.0 ;h-W&i7
*/ L,+m5wKj[
public class SortUtil { }Z,xF`
public final static int INSERT = 1; 0p31C7!
public final static int BUBBLE = 2; e!B>M{
public final static int SELECTION = 3; ^E#i5d+'N
public final static int SHELL = 4; Od,P,t9
public final static int QUICK = 5; *B3 4
public final static int IMPROVED_QUICK = 6; ,u<oAI`
public final static int MERGE = 7; gB)Cmw*
public final static int IMPROVED_MERGE = 8; k vQ] }`a
public final static int HEAP = 9; V#P`FX
eVetG,["
public static void sort(int[] data) { 6z'3e\x
sort(data, IMPROVED_QUICK); r3BQo[ 't
} y"L7.B
private static String[] name={ og~Uv"&?T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Po1/_#mu
}; 0XWhSrHM
mH,L,3R;R
private static Sort[] impl=new Sort[]{ Q`BK R]/
new InsertSort(), 6/=0RTd
new BubbleSort(), b)(rlX
new SelectionSort(), LFskNF0X
new ShellSort(), #GbfFoE
new QuickSort(), nkxv,_)ZT
new ImprovedQuickSort(), "8#EA<lsS
new MergeSort(), JnY.]:
new ImprovedMergeSort(), KB$SB25m
new HeapSort() 6]^~yby P
}; QB"Tlw(
0|=,!sY
public static String toString(int algorithm){ `mE>h4
return name[algorithm-1]; K-2oSS56
} DfsPg':z
QSNPraT
public static void sort(int[] data, int algorithm) { !j8 DCVb
impl[algorithm-1].sort(data); QEQ/
} ng6".u9
]=28s *@
public static interface Sort { iU/v;T(
public void sort(int[] data); f =MP1q[
} xW.~Jt
_)%Sz"g^Ix
public static void swap(int[] data, int i, int j) { .ED8b5t|
int temp = data; A?+0Ce&qL
data = data[j]; `bJ?8~ 8*
data[j] = temp; k E},>+W+
} U^&,xz$Cg
} k5@PZFV