[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; 94"R&|
} pU)wxv[~
int i1=l; ]>K%,}PS
int i2=mid+1; 7,ODh-?ez
for(int cur=l;cur<=r;cur++){ ,dKcxp~[
if(i1==mid+1) 5nzkZw
data[cur]=temp[i2++]; )` S,vF~
else if(i2>r) HS| &["
data[cur]=temp[i1++]; 68R[Lc9q5
else if(temp[i1] data[cur]=temp[i1++]; .Vq-<c%
else 0Z#&!xTb
data[cur]=temp[i2++]; 3/o-\wWO
} sj003jeko
} rixNz@p'%
D %~s
} >1xlP/4jx
he&*N*of:
改进后的归并排序: 98bmia&H
v#:#w.]-Y
package org.rut.util.algorithm.support; YSk,kU
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import org.rut.util.algorithm.SortUtil; OUn,URI
R@t?!`f!+
/** UO8#8
* @author treeroot Z2`(UbG}
* @since 2006-2-2 e4Ol:V
* @version 1.0 u*Eb4
*/ /r Zj=
public class ImprovedMergeSort implements SortUtil.Sort { "YHqls}c
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private static final int THRESHOLD = 10; h9LA&!
%v:9_nwO)
/* |"DQ^)3Pi
* (non-Javadoc) Q u2W
* 21M@z(q*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /og2+!
*/ l,HMm|oU
public void sort(int[] data) { Ra[{K@
int[] temp=new int[data.length]; L~SM#?z:ue
mergeSort(data,temp,0,data.length-1); jR\&2;T
} OOs Y{8xM
#/!a=0
private void mergeSort(int[] data, int[] temp, int l, int r) { OT{wqNI
int i, j, k; ;OTD1=
int mid = (l + r) / 2; ZffK];D
if (l == r) 4&~1|B{Z
return; Zz=+?L
if ((mid - l) >= THRESHOLD) v! uD]}
mergeSort(data, temp, l, mid); 3,e^;{w
else Hn0,LH$/
insertSort(data, l, mid - l + 1); y^=\w?d
if ((r - mid) > THRESHOLD) &V$_u#<
mergeSort(data, temp, mid + 1, r); BdB/`X*
else zn&NLsA
insertSort(data, mid + 1, r - mid); qYZX, x
BftW<1,U^
for (i = l; i <= mid; i++) { i}N'WV`!
temp = data; ([iMOE[D3
} `Q^G k{9P
for (j = 1; j <= r - mid; j++) { >%x7-->IB
temp[r - j + 1] = data[j + mid]; ] 7_ f'M1F
} C4&yC81Gm
int a = temp[l]; 9a"[-B:
int b = temp[r]; `] ;*k2
for (i = l, j = r, k = l; k <= r; k++) { N^xnx<
if (a < b) { ])egke\!
data[k] = temp[i++]; o X )r4H?
a = temp; ?@6N EfQf
} else { 5X4; (Qj
data[k] = temp[j--]; L|EvI.f
b = temp[j]; nJY#d;
} 7"wr8
} y|Tb&XPD
} :w:hqe|_
w4<1*u@${
/** %fnL
* @param data 6%~ Z^>`N
* @param l q3TAWNzI0
* @param i 3qE2mYK
*/ eaCv8zdX
private void insertSort(int[] data, int start, int len) { 1|l'oTAA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y` Oz\W
} 7RM$%'n\
} lX/s Q
} uV`r_P
} _@;t^j+l
K[PH#dF5,x
堆排序： UUc{1"z{
R$k4}p
package org.rut.util.algorithm.support; _Je<_pl!D
zMxHJNQ\D
import org.rut.util.algorithm.SortUtil; wZ6LiYiHl
|jH- bm
/** kL\ FY
* @author treeroot S*VG;m#
* @since 2006-2-2 ?%dsY\
* @version 1.0 ET;YAa*
*/ *cz nokq6
public class HeapSort implements SortUtil.Sort{ +KgLe>-}
FY+0r67]
/* (non-Javadoc) w4P?2-kB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .w/w] Eq
*/ Q^>"AhOiU
public void sort(int[] data) { / CEnyE/
MaxHeap h=new MaxHeap(); 8+5#FC7
h.init(data); 9`VgD<?v
for(int i=0;i h.remove(); fT.18{'>
System.arraycopy(h.queue,1,data,0,data.length); pyYm<dn
} ^0py
N}Q%y(O^
private static class MaxHeap{ 0Am&:kX't
uP2e/a
void init(int[] data){ dU<\FW_
this.queue=new int[data.length+1]; =+;l>mn?O
for(int i=0;i queue[++size]=data; 8Y?zxmwn]
fixUp(size); N^z4I,GV(
} }5 ^2g!M
} gpDH_!K
y:u7*%"
private int size=0; 4v9jGwnzt
kk#%x#L[
private int[] queue; R?Zv
EK`}?>'
public int get() { KK$t3e)
return queue[1]; ea[vzD]
} -d5b,leC^
p)v|t/7
public void remove() { pW$ZcnU
SortUtil.swap(queue,1,size--); Ey96XJV
fixDown(1); F|pM$Kd`
} 2*;qr|h,
file://fixdown $2uk;&"?A=
private void fixDown(int k) { 7niZ`doBA
int j; >L[n4x\
while ((j = k << 1) <= size) { 3}R}|Ha J#
if (j < size %26amp;%26amp; queue[j] j++; 36"-cGNr{
if (queue[k]>queue[j]) file://不用交换 S"hA@j
break; )tYu3*'
SortUtil.swap(queue,j,k); " E+V>V+
k = j; Cge@A'2
} yTJ Eo\g/@
} G#yv$LY#
private void fixUp(int k) { !jlLF:v|1A
while (k > 1) { %PA#x36
int j = k >> 1; c"D%c(:4|
if (queue[j]>queue[k]) ?1Os%9D*
break; DS;,@$N_N
SortUtil.swap(queue,j,k); X<G"GaL
k = j; `|kW%L4
} ?-M?{De
} )1?#q[x
ls[0X82F
} {<ms;Oi'
p1tqwV
} IE*eDj
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SortUtil： >,%or cN
? nx3#<
package org.rut.util.algorithm; K(jo[S
k7,
import org.rut.util.algorithm.support.BubbleSort; U<<@(d%T
import org.rut.util.algorithm.support.HeapSort; ozaM!ee\z
import org.rut.util.algorithm.support.ImprovedMergeSort; PU8>.9x
import org.rut.util.algorithm.support.ImprovedQuickSort; "06t"u<%
import org.rut.util.algorithm.support.InsertSort; I;xSd.-
import org.rut.util.algorithm.support.MergeSort; {:=sCY!
import org.rut.util.algorithm.support.QuickSort; [}>!$::Y
import org.rut.util.algorithm.support.SelectionSort; \dAs<${(
import org.rut.util.algorithm.support.ShellSort; suOWmqLs
,bTpD!
/** _43'W{%
* @author treeroot lV%oIf[OB
* @since 2006-2-2 ,J;Cb}
* @version 1.0 F/%M`?m"ie
*/ B^;"<2b*
public class SortUtil { +/+>:
public final static int INSERT = 1; P;8nC:zL
public final static int BUBBLE = 2; e|-&h `[
public final static int SELECTION = 3; KBC?SxJSJc
public final static int SHELL = 4; trx y3k;
public final static int QUICK = 5; ?Vre"6U
public final static int IMPROVED_QUICK = 6; [D%(Y ~2
public final static int MERGE = 7; ^(F@#zN}
public final static int IMPROVED_MERGE = 8; 76oJCNY
public final static int HEAP = 9; s5s'[<
-v %n@8p
public static void sort(int[] data) { uH{oJSrK
sort(data, IMPROVED_QUICK); %eOO8^N
} gOy;6\/
private static String[] name={ l+nT$IPF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wn-1fz<d
}; *Jwx,wF}4
ldFR%v>9
private static Sort[] impl=new Sort[]{ zgNzdO/B
new InsertSort(), J7;8 S
new BubbleSort(), <uG6!P
new SelectionSort(), 5Z@0XI
new ShellSort(), )L/0X40<.
new QuickSort(), ;kDUQw
new ImprovedQuickSort(), \>$3'i=mQ
new MergeSort(), 6?(yMSKa
new ImprovedMergeSort(), 3N[Rrxe2
new HeapSort() Ce/l[v
}; 8bJj3vr
%* k`z#b
public static String toString(int algorithm){ H\fsyxM7
return name[algorithm-1]; (b;Kl1Ql]
} zC,c9b
X$2f)3
public static void sort(int[] data, int algorithm) { zJ6""38Pr
impl[algorithm-1].sort(data); OwCbv j0#
} oGRd ;hsF
6gs0Vm
public static interface Sort { 6Ki!j<
public void sort(int[] data); +)hxYLk&I
} uf^HDrr<L
`r'$l<(4WV
public static void swap(int[] data, int i, int j) { =`ZRPA!aY
int temp = data; i!{A7mo
data = data[j]; \Up~"q>Kb
data[j] = temp; Xf#+^cQ
} NDUH10Y:[
} 9.%t9RM^