[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; _!C'oG6s?
} Zlf) dDn
int i1=l; R.B3
int i2=mid+1; 6qp' _?
for(int cur=l;cur<=r;cur++){ _^cFdP)8|
if(i1==mid+1) 6o^sQ(]
data[cur]=temp[i2++]; !ie'}|c
else if(i2>r) K18Sj,]B
data[cur]=temp[i1++]; jbK<"T5
else if(temp[i1] data[cur]=temp[i1++]; o5|P5h
else pxi/ ]6pw
data[cur]=temp[i2++]; EHY}gG)
} @8s:,Y_
} r-k,4Yz
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} DqTp*hI
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改进后的归并排序: E< Ini'od[
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package org.rut.util.algorithm.support; 9q|36CAO_
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import org.rut.util.algorithm.SortUtil; d ,!sZ&v
[_,Gk]F=
/** #{oGmzG!
* @author treeroot p:9^46N@
* @since 2006-2-2 RFq&#3f$
* @version 1.0 qGPIKu
*/ 5/"&C-t
public class ImprovedMergeSort implements SortUtil.Sort { cl3Dwrf?
0-a[[hL?
private static final int THRESHOLD = 10; 3a\.s9A"
zQhc V
/* p{k^)5CR/
* (non-Javadoc) 3 h~U)mg
* 4c/.#?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }m0hq+p^
*/ xh raf1v3\
public void sort(int[] data) { `L1lGlt
int[] temp=new int[data.length]; Zn9ecN
mergeSort(data,temp,0,data.length-1); {&Es3+{A
} o\7q!
KOM]7%ys1H
private void mergeSort(int[] data, int[] temp, int l, int r) { 4ZN&Yf`
int i, j, k; H(k-jAO,
int mid = (l + r) / 2; H[KTM'n
if (l == r) yJ!x`RD),w
return; {s/u[T_D2
if ((mid - l) >= THRESHOLD) Gv uX"J
mergeSort(data, temp, l, mid); -32?]LN}
else 3om4q2R
insertSort(data, l, mid - l + 1); w`;>+_ E7
if ((r - mid) > THRESHOLD) Jg\1(ix
mergeSort(data, temp, mid + 1, r); c!})%{U
else (fJ.o-LQ
insertSort(data, mid + 1, r - mid); rxVJB3P9
W n43TSs-
for (i = l; i <= mid; i++) { :Z'q1kW@"
temp = data; 4RYvI!
} ,V}Vxq3
for (j = 1; j <= r - mid; j++) { .*>pD/
temp[r - j + 1] = data[j + mid]; v)AadtZ0d
} $IU|zda8
int a = temp[l]; FaUc"J
int b = temp[r]; :0)nL
for (i = l, j = r, k = l; k <= r; k++) { ;x=r.3OQy
if (a < b) { }qhNz0*
data[k] = temp[i++]; ka$oUB)iQ
a = temp; "Yu';&
} else { +zup+=0e
data[k] = temp[j--]; '7Aj0U(
b = temp[j]; ID1/N)56
} f/Q7WXl0
} IR<`OA
} 3S_H hvB
L% cr`<~
/** nB+ e2e&
* @param data OG&X7>'3I{
* @param l .oR_r1\y
* @param i `LID*uD;_
*/ DoYzTSWx
private void insertSort(int[] data, int start, int len) { [)&(zJHX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hlg Q0qb
} a'pJg<
} S@'yuAe*G
} R:LThFx
} B1C"F-2d
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堆排序： 82bOiN15
`mfN3Q*[c
package org.rut.util.algorithm.support; !U2Wiks
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import org.rut.util.algorithm.SortUtil; z]Jpvw`p
#*|0WaC
/** KW~fW r8
* @author treeroot vKvT7Zxc
* @since 2006-2-2 EFYyr f@
* @version 1.0 2]f"(X4jp
*/ (.DX</f/4
public class HeapSort implements SortUtil.Sort{ H!+T2<F9R
w[V71Iej
/* (non-Javadoc) b&$sY!iU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GG@&jcp7
*/ h5.>};"@'
public void sort(int[] data) { %+y92'GqG/
MaxHeap h=new MaxHeap(); N))G/m3
h.init(data); ;| :^zo
for(int i=0;i h.remove(); aybfBC
System.arraycopy(h.queue,1,data,0,data.length); Dm.tYG
} =H\ig%%E@
=!RlU)w
private static class MaxHeap{ ct3^V M&/
=h{jF7
void init(int[] data){ X!w&ib-
this.queue=new int[data.length+1]; cG`R\$
for(int i=0;i queue[++size]=data; du:%{4
fixUp(size); GGY WvGE+
} *A,h^
} uk(|c-_]~c
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private int size=0; E2D}F@<]
h 'F\9t
private int[] queue; ny.YkN2
!VfP#B6.
public int get() { Cy~Pfty
return queue[1]; Yc*Ex-s
} 3]X~bQAw
?oc#$fcQ~
public void remove() { t*&O*T+fgy
SortUtil.swap(queue,1,size--); jnl3P[uQ
fixDown(1); h xCt[G@
} H#LlxD)q
file://fixdown $ 4& )
private void fixDown(int k) { N>'T"^S/
int j; *UJ&9rQ
while ((j = k << 1) <= size) { Y`x54_32
if (j < size %26amp;%26amp; queue[j] j++; -]?F
if (queue[k]>queue[j]) file://不用交换 c-2##Pf_8O
break; K`25G_Y3@
SortUtil.swap(queue,j,k); ftqi>^i
k = j; 2bB&/Uumsd
} <~[A
} Q0}Sju+HX
private void fixUp(int k) { YMSA[hm
while (k > 1) { 6S~lgH:
int j = k >> 1; U#jbii6e
if (queue[j]>queue[k]) d`_X$P4y
break; wjr1?c
SortUtil.swap(queue,j,k); ]y3'6!
k = j; fgg;WXcT ~
} -<'&"-
} >4zH\T!
#_, l7q8U
} $YmD;
nEZoF
} ^E5[~C*o3
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SortUtil： <]u~;e57
jtMN)TM
package org.rut.util.algorithm; Qo!/n`19
d0`5zd@S
import org.rut.util.algorithm.support.BubbleSort; k lRS:\dW
import org.rut.util.algorithm.support.HeapSort; FK$?8Jp
import org.rut.util.algorithm.support.ImprovedMergeSort; &s|&cT
import org.rut.util.algorithm.support.ImprovedQuickSort; .[Z<r>
import org.rut.util.algorithm.support.InsertSort; Felu`@b
import org.rut.util.algorithm.support.MergeSort; 9Okb)K95
import org.rut.util.algorithm.support.QuickSort; oWZbfR9R
import org.rut.util.algorithm.support.SelectionSort; BtyBZ8P;e
import org.rut.util.algorithm.support.ShellSort; k-v@sb24_
em87`Hj^lo
/** *uLlf'qU]
* @author treeroot i_? S#L]h
* @since 2006-2-2 (5SN=6O
* @version 1.0 G|Du/XYh
*/ *o/Q#
public class SortUtil { 0<{+M`G/
public final static int INSERT = 1; ]yxRaW9f
public final static int BUBBLE = 2; a-t}L{~
public final static int SELECTION = 3; fR=B/`
public final static int SHELL = 4; mgB7l0)b
public final static int QUICK = 5; 8h&Ed=gi
public final static int IMPROVED_QUICK = 6; Hd1e9Q,:|
public final static int MERGE = 7; ;t.LLd
public final static int IMPROVED_MERGE = 8; _$+lyea
public final static int HEAP = 9; l%aiG+z%6}
)$*T>.JA
public static void sort(int[] data) { o*OaYF'8
sort(data, IMPROVED_QUICK); RtrESwtR
} a!1\,.
private static String[] name={ 7PDz ]i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OZ*V7o
}; A 'Q nL
H+]>*^'8
private static Sort[] impl=new Sort[]{ +%$'(ts
new InsertSort(), F8\nAX
new BubbleSort(), /$7_*4e
new SelectionSort(), nyZUf{:
new ShellSort(), [jD.l;jF
new QuickSort(), pZu2[
new ImprovedQuickSort(), pq"3)+3:
new MergeSort(), IAD_Tck
new ImprovedMergeSort(), 3H0~?z_
new HeapSort() 9Blc
}; IH;+pN
D Hkmn
public static String toString(int algorithm){ -Mb`I >=
return name[algorithm-1]; z@lUaMm:F
} !BN7 B
fIo7R-XP
public static void sort(int[] data, int algorithm) { Wx;`=9
impl[algorithm-1].sort(data); /7$3RV(
} s V70a3#
!5rja-h
public static interface Sort { SBnwlM"AN
public void sort(int[] data); :nuMakZZ
} Yg5m=Lis
wG1A]OJl1
public static void swap(int[] data, int i, int j) { kI>Iq Q-h
int temp = data; Fd:A^]
data = data[j]; -saisH6
data[j] = temp; x[Xj[O
} -kp!.c
} uTNmt]