[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; S tnv>
} 6@q[tN7_^
int i1=l; &3Z. #*
int i2=mid+1; ~59`S#ax/l
for(int cur=l;cur<=r;cur++){ x XM!E 8
if(i1==mid+1) PCPf*G>
data[cur]=temp[i2++]; {R-82%X
else if(i2>r) oD#>8Aws
data[cur]=temp[i1++]; vM7vf6
else if(temp[i1] data[cur]=temp[i1++]; vA"niO
else 1N9<d,
data[cur]=temp[i2++]; u'i%~(:$\)
} /J.\p/%\
} =6L*!JP<
"6N~2q,SW
} ml.;wB|
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改进后的归并排序: o}MzqKfu
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package org.rut.util.algorithm.support; XDkS ^9
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import org.rut.util.algorithm.SortUtil; Ji6`-~ k
-nk#d%a\
/** g TXW2S
* @author treeroot 'Z.OF5|eGT
* @since 2006-2-2 9G#8%[W
* @version 1.0 E-sSRt
*/ W&e'3gk_
public class ImprovedMergeSort implements SortUtil.Sort { qA/#IUi)1
G7Z vfLR{:
private static final int THRESHOLD = 10; _7lt(f[S
M_h8#7{G
/* |,;twj[?4
* (non-Javadoc) cXS;z.M\_
* ,$h(fM8GC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NTm<6Is`
*/ v`S2M
public void sort(int[] data) { %9T~8L @.
int[] temp=new int[data.length]; >'aG/(
mergeSort(data,temp,0,data.length-1); hIVI\U,
} WVS$O99Y
cgs3qI
private void mergeSort(int[] data, int[] temp, int l, int r) { V(;55ycr
int i, j, k; |P~O15V*Q
int mid = (l + r) / 2; [x!i* rW3
if (l == r) j-J(C[[9
return; R2}kz.
if ((mid - l) >= THRESHOLD) L#`2.nU
mergeSort(data, temp, l, mid); 2J;kD2"!
else m$fQ`XzU
insertSort(data, l, mid - l + 1); @[MO,J&h
if ((r - mid) > THRESHOLD) n1QEu"~Zj
mergeSort(data, temp, mid + 1, r); 5vD3K!\u
else oL<BLr9>
insertSort(data, mid + 1, r - mid); u64@"P
C=N!z
for (i = l; i <= mid; i++) { iH-bo@
temp = data; CifA,[l34
} \U/v;Ijf
for (j = 1; j <= r - mid; j++) { _*s~`jn{H
temp[r - j + 1] = data[j + mid]; tT;8r8@
} j~Q}F|i8
int a = temp[l]; .#*D!;f
int b = temp[r]; 7\mDBG
for (i = l, j = r, k = l; k <= r; k++) { Ri|k<io
if (a < b) { ,H>W:O
data[k] = temp[i++]; NW z9C=y
a = temp; A-Mj|V
} else { glv ;C/l
data[k] = temp[j--]; (tepmcf
b = temp[j]; oP/>ju
} SOVjEo4'3
} 2(pLxVl
} R7lYu\mA
hM?`x(P
/** %/51o6a
* @param data d$w(-tV42
* @param l p"2m90IO
* @param i wHf&R3fg
*/ G\R*#4cF
private void insertSort(int[] data, int start, int len) { Z a! gbt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rn;<HT
} Hb+X}7c$
} le.anJAr
} rWA6XDM7
} PSPTL3_~
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堆排序： V\0E=M*P
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package org.rut.util.algorithm.support; "?35C !
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import org.rut.util.algorithm.SortUtil; _BbvhWN&+
2HD:JdL
/** ~(P&g7u
* @author treeroot e!GZSk
* @since 2006-2-2 ?-f,8Z|h
* @version 1.0 msiu8E
*/ *Ddi(`
public class HeapSort implements SortUtil.Sort{ |jsb@
|d[5l^6
/* (non-Javadoc) ++b$E&lYU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8] `Ru5nd
*/ j C)-`_
public void sort(int[] data) { Us]=Y}(
MaxHeap h=new MaxHeap(); ;r.EC}>m
h.init(data); HJIC<U
for(int i=0;i h.remove(); U6<M/>RG$
System.arraycopy(h.queue,1,data,0,data.length); QOH<]~3J
} {L].T#
dxK9:IX
private static class MaxHeap{ ]W/>Ldv
Or8kp/d
void init(int[] data){ 2Q@Y^t
this.queue=new int[data.length+1]; /`3#4=5-
for(int i=0;i queue[++size]=data; .fp&MgiQ
fixUp(size); I`T1Pll
} y!~qbh[
} {e"dm5
uH:YKH':/
private int size=0; wP<07t[-g
WF[bO7:
private int[] queue; vcv CD7MD
2:SO_O4C
public int get() { [c~kF+8
return queue[1]; "g0(I8
} y t5H oy
g9~]s9
public void remove() { pr&=n;_ n
SortUtil.swap(queue,1,size--); ,eRQu.
fixDown(1); 5)UQWnd5
} |ZiC`Nt
file://fixdown ) #+^ sAO
private void fixDown(int k) { SwW['c'*]B
int j; .4-,_`T?
while ((j = k << 1) <= size) { =5x&8i
if (j < size %26amp;%26amp; queue[j] j++; a`!@+6yC
if (queue[k]>queue[j]) file://不用交换 ;+/o?:AH
break; 2oCkG~j
SortUtil.swap(queue,j,k); k~.&j"K
k = j; "@/62b
} Ba'LRz
} ~ G6"3"
private void fixUp(int k) { 2=iH$v
while (k > 1) { bt$)Xu<R
int j = k >> 1; +>\id~c(
if (queue[j]>queue[k]) [yS#O\$'e
break; X3%Ic`Lq#
SortUtil.swap(queue,j,k); B9,^mE#
k = j; n6<V+G)T
} &ldBv_
} {{yZ@>o6
=]C]=
} 5jxQW ;
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} 9DQa PA6
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SortUtil： \Ae9\Jp8M
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package org.rut.util.algorithm; C3NdE_E
^Yj xeNY
import org.rut.util.algorithm.support.BubbleSort; JM- t<.
import org.rut.util.algorithm.support.HeapSort; ]X Z-o>+,
import org.rut.util.algorithm.support.ImprovedMergeSort; Z|"p*5O,
import org.rut.util.algorithm.support.ImprovedQuickSort; 7R!5,Js+
import org.rut.util.algorithm.support.InsertSort; d5 7i)=
import org.rut.util.algorithm.support.MergeSort; $37 g]ZD
import org.rut.util.algorithm.support.QuickSort; !V2/A1?
import org.rut.util.algorithm.support.SelectionSort; E.|-?xQ6
import org.rut.util.algorithm.support.ShellSort; F# T 07<
6(d}W2GP
/** b` Hz$8
* @author treeroot 29CINC
* @since 2006-2-2 V-'K6mn;
* @version 1.0 %\|'%/"`2(
*/ Bw%Qbs0Q
public class SortUtil { lKZB?Kk^w\
public final static int INSERT = 1; w@JKl5
public final static int BUBBLE = 2; p~HW5\4
public final static int SELECTION = 3; Tm_B^W}
public final static int SHELL = 4; ]$b[`g&
public final static int QUICK = 5; r}[7x]sP
public final static int IMPROVED_QUICK = 6; <S?ddp2
public final static int MERGE = 7; J]f3CU,<N
public final static int IMPROVED_MERGE = 8; xk&Jl#v
public final static int HEAP = 9; !aO` AC=5u
;q N+^;,2
public static void sort(int[] data) { U!U$x74D5
sort(data, IMPROVED_QUICK); hW!)w
} gUyR_5q)8l
private static String[] name={ oy<WsbnS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GFr|E8
}; ~/.7l8)
g1t0l%_7^
private static Sort[] impl=new Sort[]{ #9K-7je;j
new InsertSort(), o,|[GhtHqs
new BubbleSort(), C z\Ppq
new SelectionSort(), xhcK~5C
new ShellSort(), sc,Xw:YO
new QuickSort(), 0}_[DAd6
new ImprovedQuickSort(), HRB<Y mP@
new MergeSort(), jH_JmYd
new ImprovedMergeSort(), xyI}y(CN1
new HeapSort() q$=#A7H>3)
}; OpHsob~
zc[Si bT
public static String toString(int algorithm){ rtc9wu
return name[algorithm-1]; F_CYYGZ
} qvPtyc^fN
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public static void sort(int[] data, int algorithm) { fkac_X$7
impl[algorithm-1].sort(data); P#AW\d^"B
} t.;LnrY
thhwN A
public static interface Sort { 7Hs%Cc"
public void sort(int[] data); P-9<YN
} X7rMeu
)==Jfn y
public static void swap(int[] data, int i, int j) { 6fw(T.Pe
int temp = data; *c2YRbU(
data = data[j]; ?"g!
data[j] = temp; d@qsdYu-*
} :8OZ#D_Hl
} jbAx;Xt'=M