[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; 'Bx7b(xqk
} q.7CPm+
int i1=l; S}E@*t2h
int i2=mid+1; OjI*HC
for(int cur=l;cur<=r;cur++){ wF(FV4#gs
if(i1==mid+1) Yq_zlxd%F
data[cur]=temp[i2++]; 1"k@O)?JP
else if(i2>r) x@~V975Y
data[cur]=temp[i1++]; u$"5SGI6
else if(temp[i1] data[cur]=temp[i1++]; k<qQ+\X
else WJ*DWyd''
data[cur]=temp[i2++]; F\e'z
} h4#5j'RO
} <5q}j-Q
u+'=EGl
} }bVyvH
C*9m `xh
改进后的归并排序: cg~FW2Q
UnPSJ]VW
package org.rut.util.algorithm.support; ec=C7M |
K^S#?T|[9
import org.rut.util.algorithm.SortUtil; 'e)t+
?9mY #_Of
/** $I9zJ"*
* @author treeroot &}FYz8w 2/
* @since 2006-2-2 JeA}d
* @version 1.0 DM&"oa50
*/ ^o 5q- ;a
public class ImprovedMergeSort implements SortUtil.Sort { ihnM`TpMJ
F ;D_zo?
private static final int THRESHOLD = 10; /vhh2`
!EFd-fk
/* X[w9~t$\
* (non-Javadoc) ^c5(MR7LD
* uxcj3xE#d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 86_Zh5:
*/ 25(\'484>
public void sort(int[] data) { efhwbn
int[] temp=new int[data.length]; )_jO8)jB
mergeSort(data,temp,0,data.length-1); S8y4 p0mV
} K(p1+GHC
V)]&UbEL|
private void mergeSort(int[] data, int[] temp, int l, int r) { A!J5Wz>Q5
int i, j, k; i8{jMe!Sa
int mid = (l + r) / 2; >M!>Hl/
if (l == r) @dXf_2Tv=
return; ':,LZ A8A
if ((mid - l) >= THRESHOLD) Xy{b(b;9
mergeSort(data, temp, l, mid); zumRbrz
else u/zC$L3B(
insertSort(data, l, mid - l + 1); 8,R]R=
if ((r - mid) > THRESHOLD) BYY>;>V
mergeSort(data, temp, mid + 1, r); YPM>FDxDB
else ReRRFkO"2
insertSort(data, mid + 1, r - mid); ]X5*e'
i~2>kxf;K1
for (i = l; i <= mid; i++) { 7+ysE
temp = data; ._yr7uY[M
} V7^?jck
for (j = 1; j <= r - mid; j++) { My ^pQ]@
temp[r - j + 1] = data[j + mid]; pM=vW{"I/
} ;?&;I!
int a = temp[l]; XBc+_=)$
int b = temp[r]; J+TYm%A;-
for (i = l, j = r, k = l; k <= r; k++) { 8(A:XQN"h
if (a < b) { =_XcG!"
data[k] = temp[i++]; t.w?OyO
a = temp; o{ (v
} else { 1eJ\CdI
data[k] = temp[j--]; LJ)3!Q/:
b = temp[j]; saZ;ixV
} +vuW9
} ?SpI^Wn)[
} |gaZq!l
%cv%u6 b
/** ]_Qc}pMF&
* @param data ux }DWrR
* @param l LU]~d<i99
* @param i 5 909O
*/ YK-R|z6K
private void insertSort(int[] data, int start, int len) { u+V;r)J{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OJK/>
} 8]c`n!u=`
} {tMD*?C[6
} ,^[s4 =3X?
} 7KEGTKfW
=FKB)#N
堆排序： |&'*Z\*ya
ZO`d
package org.rut.util.algorithm.support; eyM3W}[S$/
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import org.rut.util.algorithm.SortUtil; &A9+%kOk>
qkEy$[D9
/** {/Cd^CK
* @author treeroot p[wjHfIq
* @since 2006-2-2 xq{4i|d)
* @version 1.0 1@ina`!1O
*/ iO@wqbg$6
public class HeapSort implements SortUtil.Sort{ =_86{wlk
%Xi%LUk{
/* (non-Javadoc) 8 2qe|XD4p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =Dz[|$dV
*/ -7`J(f.rYC
public void sort(int[] data) { aJF`rLm
MaxHeap h=new MaxHeap(); \Q$);:=qQ
h.init(data); ]]7T5'.
for(int i=0;i h.remove(); bcYz?o6
System.arraycopy(h.queue,1,data,0,data.length); @|@43}M]C-
} zk]~cG5dT/
fP|\1Y?CS
private static class MaxHeap{ &td#m"wI
f[RnL#*xJU
void init(int[] data){ n*1UNQp@]O
this.queue=new int[data.length+1]; %Xl@o
for(int i=0;i queue[++size]=data; PEWzqZ|!;
fixUp(size); p.HA`R>
} pI`Ke"
} *G^]j )/
K+\hv~+@
private int size=0; e=_hfOUC
[>0r'-kI
private int[] queue; qha<.Ro
l.BNe)1!22
public int get() { \9p;md`
return queue[1]; N9Ml&*%oX{
} !S:@x.n@iR
*E]\l+]J
public void remove() { 4Q>F4v`
SortUtil.swap(queue,1,size--); >W<5$.G
fixDown(1); 1<83MO;
} ;W].j%]Le
file://fixdown !xI![N^
private void fixDown(int k) { Ba6xkEd
int j; sn(}5;
while ((j = k << 1) <= size) { *v+ fkg
if (j < size %26amp;%26amp; queue[j] j++; bhmjH(.t
if (queue[k]>queue[j]) file://不用交换 C#Jj;Gd
break; {@A2jk\
SortUtil.swap(queue,j,k); c'2ra/?k
k = j; 0YL0Oa+7
} i`qh|w/b_
} wk#QQDV3|0
private void fixUp(int k) { EMG*8HRI>r
while (k > 1) { 0h#M)Ft
int j = k >> 1; BXY'%8q _a
if (queue[j]>queue[k]) bed+Ur&
break; YC'~8\x3z
SortUtil.swap(queue,j,k); qE}YVKV*
k = j; fsd>4t:"\
} }b`*%141
} U4gJ![>5j
=HHg:"
} V{{x~Q9
DF2&j!
} <.ky1aex7
\`ReZu$
SortUtil： $P3nP=mf
U5"OhI
package org.rut.util.algorithm; V-jL`(JF%
7g9^Jn
import org.rut.util.algorithm.support.BubbleSort; `'WLGQG
import org.rut.util.algorithm.support.HeapSort; 03@|dN
import org.rut.util.algorithm.support.ImprovedMergeSort; EB<q.
import org.rut.util.algorithm.support.ImprovedQuickSort; Sj?sw]3
import org.rut.util.algorithm.support.InsertSort; K8Zk{on
import org.rut.util.algorithm.support.MergeSort; hm>*eJNp]
import org.rut.util.algorithm.support.QuickSort; VWt'Kx"
import org.rut.util.algorithm.support.SelectionSort; %<yM=1~>
import org.rut.util.algorithm.support.ShellSort; VsEAo
bl_WN|SQ
/** QaR.8/xV
* @author treeroot WmUW i{
* @since 2006-2-2 RCXSz
* @version 1.0 dRm'$ G9
*/ B}+9U
public class SortUtil { 4tJ4X' U
public final static int INSERT = 1; X:&p9_O@
public final static int BUBBLE = 2; 2j1v.%
public final static int SELECTION = 3; Y{RB\}f(
public final static int SHELL = 4; A'iF'<%
public final static int QUICK = 5; twmJ
public final static int IMPROVED_QUICK = 6; }c ;um
public final static int MERGE = 7; f*{;\n(.t
public final static int IMPROVED_MERGE = 8; CL :M>(
public final static int HEAP = 9; jSp&mD*xv
#l#[\6
public static void sort(int[] data) { &\|<3sd(
sort(data, IMPROVED_QUICK); iLcadX
} oh0|2IrM
private static String[] name={ )+4}Ix/q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zN/~a)
}; }, &,Dt
YzW7;U S
private static Sort[] impl=new Sort[]{ g{)H" 8L
new InsertSort(), (Zg'pSs)
new BubbleSort(), p]z54 ~
new SelectionSort(), XqS*;Zj0
new ShellSort(), 0nq}SH
new QuickSort(), tO>OD#
new ImprovedQuickSort(), VfqY_NmgC
new MergeSort(), [j]J_S9jJ
new ImprovedMergeSort(), >ydb?
new HeapSort() G4%M$LJh
}; emY5xZ@N
|\n)<r_
public static String toString(int algorithm){ 9'#.>Q>0=j
return name[algorithm-1]; fwv T2G4
} :CST!+)o
3p 1EScH
public static void sort(int[] data, int algorithm) { Q=L$7
impl[algorithm-1].sort(data); d3=6MX[c
} <ivqe"m
pebx#}]p-
public static interface Sort { 9#T%bB"J
public void sort(int[] data); ]RXtC*
} T19rbL_
$K.%un Gm
public static void swap(int[] data, int i, int j) { >+jbMAYSq
int temp = data; #w,WwL!
data = data[j]; .1}rzh}8
data[j] = temp; !E{GcK
} B?lBO V4v4
} N~S[xS?