[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; MqI!i>
} 7Q.?]k&
int i1=l; B;':Eaa@
int i2=mid+1; R '/Ilz`
for(int cur=l;cur<=r;cur++){ E7axINca
if(i1==mid+1) ]baO{pJi
data[cur]=temp[i2++]; W%.Kr-[?`o
else if(i2>r) ^r$P&}Z\b
data[cur]=temp[i1++]; W$P)fPU'
else if(temp[i1] data[cur]=temp[i1++]; e p;_'
else C;;dCsiV5
data[cur]=temp[i2++]; yHhBUpIo
} |k+Y >I&
} y4Plm.
qgU$0enSs
} o$YL\ <qp
3%xj-7z W
改进后的归并排序: 9[B*CD|
hM(|d@)
package org.rut.util.algorithm.support; jzu1>*ok
*A O/$K@Ma
import org.rut.util.algorithm.SortUtil; ,?7URx*
ueYZM<],
/** KaHjL&!
* @author treeroot bY;ah;<
* @since 2006-2-2 oO>mGl36H
* @version 1.0 `hL16S
*/ eEQ 4L\d
public class ImprovedMergeSort implements SortUtil.Sort { 3m?3I2k
t8 #&bUX
private static final int THRESHOLD = 10; }S$]MY,*
!B(6
/* j#0@%d
* (non-Javadoc) &B7X LO[
* HkEfBQmh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qg9 N?e{z
*/ }0|,*BkI m
public void sort(int[] data) { 5B@+$D[0?3
int[] temp=new int[data.length]; o|AV2FM)
mergeSort(data,temp,0,data.length-1); +=^10D
} a4L8MgF&$-
7\K=8G
private void mergeSort(int[] data, int[] temp, int l, int r) { $AUC#<*C
int i, j, k; ~k4S~!(U0
int mid = (l + r) / 2; ,)nO
if (l == r) PygaW&9Z|d
return; W :jC2,s!m
if ((mid - l) >= THRESHOLD) WeE>4>^
mergeSort(data, temp, l, mid); ,Rk;*MEMJ
else ">lu8F
insertSort(data, l, mid - l + 1); ;2-,Xzz8
if ((r - mid) > THRESHOLD) '$PiyM|V
mergeSort(data, temp, mid + 1, r); Qhsh{muw(
else Y:oL
insertSort(data, mid + 1, r - mid); CbA!
:}v&TQ
for (i = l; i <= mid; i++) { ">*PH}b
temp = data; vz*QzVk1
} iXMs*GcK
for (j = 1; j <= r - mid; j++) { [GX5jD#
temp[r - j + 1] = data[j + mid]; ?A;x%8}
} lh&Q{t(+8
int a = temp[l]; M;,Q8z%
int b = temp[r]; Z~ VOO7|m
for (i = l, j = r, k = l; k <= r; k++) { r'uD|T H
if (a < b) { Oj6-
data[k] = temp[i++]; YgCJ s;
a = temp; \IbGNV`q
} else { V.6h6B!vB
data[k] = temp[j--]; p@y?xZS
b = temp[j]; 9H$#c_zrq
} vX;WxA<
} F??})YX
} De@GNN"-
&xo,49`!
/** #HpF\{{v
* @param data |TatRB3>
* @param l )"q$g&
* @param i B>WAlmPA
*/ +1~Y2
private void insertSort(int[] data, int start, int len) { z;JyHC)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E4GtJ`{X
} Cb5;l~}L
} JwL}|o6
} EaaQC]/OX5
} 85+'9#~!
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堆排序： A}v!vVg
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package org.rut.util.algorithm.support; ]KdSwIbi
dE~]%fUFy-
import org.rut.util.algorithm.SortUtil; ^pruQp1X
jT>G8}h
/** byoP1F%
* @author treeroot v% 6uU
* @since 2006-2-2 F_.rLgGY
* @version 1.0 \H^DiF%f9
*/ \9j +ejGf
public class HeapSort implements SortUtil.Sort{ (Ild>_Tdb`
Vea2 oQq
/* (non-Javadoc) 5]pvHc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #@FMH*?xX6
*/ q{T[|(!
public void sort(int[] data) { f?vbIc`
MaxHeap h=new MaxHeap(); @lpo$lN0R
h.init(data); Htl2CcZ
for(int i=0;i h.remove(); {o1vv+i
System.arraycopy(h.queue,1,data,0,data.length); @oE^(
} j5\z7
x7\b-EC
private static class MaxHeap{ ]!CMo+
O(x1Ja,&
void init(int[] data){ }huj%Pnk)
this.queue=new int[data.length+1]; 3-x ;_
for(int i=0;i queue[++size]=data; +~xY}
fixUp(size); 'u@,,FFz[K
} gQ90>P:
} kNq>{dNRx
x*>@knP<-
private int size=0; U'~M(9uv:
J5dwd,FQ
private int[] queue; skrdL.5
by07l5
public int get() { uCkXzb9_z
return queue[1]; e}lF#$
} tVfZ~qJ
) uM*`%
public void remove() { 5j'7V1:2
SortUtil.swap(queue,1,size--); Uh[MBwK
fixDown(1); >b\{y}[
} `Iwl\x[A
file://fixdown 3yGo{uW
private void fixDown(int k) { qzon);#7w
int j; T.bn~Z#f
while ((j = k << 1) <= size) { x[u4>f
if (j < size %26amp;%26amp; queue[j] j++; hTfq>jIB_
if (queue[k]>queue[j]) file://不用交换 lw+54lZX|
break; ob3)bI oM
SortUtil.swap(queue,j,k); _[)f<`!g_V
k = j; Hk&op P9)
} ^wass_8
} qwhDv+o
private void fixUp(int k) { >EE}P|=-
while (k > 1) { M./1.k&@
int j = k >> 1; /{6&99SJcc
if (queue[j]>queue[k]) &t)$5\r
break; jVlXB6[-
SortUtil.swap(queue,j,k); ,~Y[XazT
k = j; ]@Z[/z%~04
} r+=%Ag
} oYx4+xH/
Ml,~@} p
} --OAsbr
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} M!i["($_
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SortUtil： "+XF'ZO
kz0pX-@b
package org.rut.util.algorithm; #~}4< 18
-%fc)y&$
import org.rut.util.algorithm.support.BubbleSort; +MR]h [
import org.rut.util.algorithm.support.HeapSort; xig4H7V
import org.rut.util.algorithm.support.ImprovedMergeSort; 8I8{xt4
import org.rut.util.algorithm.support.ImprovedQuickSort; z`H|]${X
import org.rut.util.algorithm.support.InsertSort; - +<ai
import org.rut.util.algorithm.support.MergeSort; h\T}$jgfWm
import org.rut.util.algorithm.support.QuickSort; PGd?c#v#
import org.rut.util.algorithm.support.SelectionSort; J,G/L!Bp
import org.rut.util.algorithm.support.ShellSort; .R^R32ln
QXI#gA =
/** q}PUwN6
* @author treeroot mX/'Fta
* @since 2006-2-2 :>CD;
* @version 1.0 *epK17i=
*/ LbkQuq/d
public class SortUtil { (N6=+dNY
public final static int INSERT = 1; C>A} e6o
public final static int BUBBLE = 2; qrHCr:~
public final static int SELECTION = 3; A&N$=9.N1
public final static int SHELL = 4; GvzaLEo
public final static int QUICK = 5; 'QSj-
public final static int IMPROVED_QUICK = 6; =Q,D3F -+f
public final static int MERGE = 7; bV$g]->4e
public final static int IMPROVED_MERGE = 8; uK%0,!q
public final static int HEAP = 9; ?%cZO"
g& ou[_A
public static void sort(int[] data) { /Qu<>#[?
sort(data, IMPROVED_QUICK); L,yq'>*5s
} #.<Dq8u
private static String[] name={ -G[TlH06
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lT?Vt`==~M
}; XE'3p6
(%j V[Q
private static Sort[] impl=new Sort[]{ A(9$!%#+L
new InsertSort(), !k<k]^Z\
new BubbleSort(), vYybQ&E/
new SelectionSort(), FwE<_hq//
new ShellSort(), v4qpE!W27~
new QuickSort(), :x,dYJm
new ImprovedQuickSort(), dUQ)&Hv
new MergeSort(), Bx/)Sl@
new ImprovedMergeSort(), rR4?*90vjj
new HeapSort() }ssP%c]
}; W K(GR\@
00LL&ot
public static String toString(int algorithm){ mGpBj9jr1
return name[algorithm-1]; |H(i)yu"5'
} # uy^AC$
_Tf %<E
public static void sort(int[] data, int algorithm) { \#v(f2jPF
impl[algorithm-1].sort(data); *:%I|5
} Z,-J tl
UGxF}Q
public static interface Sort { %CZGV7JdA
public void sort(int[] data); VtzBYza
} tl 9`
#nQboTB@
public static void swap(int[] data, int i, int j) { e<{waJ1
int temp = data; ?e%u[Q0
data = data[j]; D;hJK-Y
data[j] = temp; ?pdN!zOeL
} bZ#KfR
} th{ie2$