[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; Wh..QVv
} [8UZ5_1WL
int i1=l; 2oEuqHL
int i2=mid+1; C3Q #[
for(int cur=l;cur<=r;cur++){ ?gUraSFU
if(i1==mid+1) ]7cciob
data[cur]=temp[i2++]; .%{B=_7
else if(i2>r) ?4U4o<
data[cur]=temp[i1++]; S*=^I2;
else if(temp[i1] data[cur]=temp[i1++]; LdH1sHy*d`
else S9P({iZK
data[cur]=temp[i2++]; oJ %Nt&q
} >qB`03>
} ULxQyY;32
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改进后的归并排序: f.uuXK
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package org.rut.util.algorithm.support; |f @A-d X
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import org.rut.util.algorithm.SortUtil; i KQj[%O
u-|%K.A
/** >oWPwXA
* @author treeroot 8^+|I,
* @since 2006-2-2 X4S|JT
* @version 1.0 \Db;7wh
*/ ]o]`X$n
public class ImprovedMergeSort implements SortUtil.Sort { JyTETf,y
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private static final int THRESHOLD = 10; B G\)B
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/* @,eo*
* (non-Javadoc) {Kr}RR*{X
* ~`&4?c3p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;"0bVs`.^e
*/ e|~{X\l
public void sort(int[] data) { ;Us6:}s
int[] temp=new int[data.length]; Yg '(
mergeSort(data,temp,0,data.length-1); L`K)mCr
} 0.wF2!V.
#K:iB*
private void mergeSort(int[] data, int[] temp, int l, int r) { ~y"R{-%uS
int i, j, k; ?]Hs~n-
int mid = (l + r) / 2; (^FMm1@T
if (l == r) [[^r;XKQ
return; 0@b<?Ms9
if ((mid - l) >= THRESHOLD) $peL1'Evo
mergeSort(data, temp, l, mid); XrTc5V
else ^_Lnqk6
insertSort(data, l, mid - l + 1); 9C,gJp}P
if ((r - mid) > THRESHOLD) NpZ'pBl
mergeSort(data, temp, mid + 1, r); 9ThsR&h3
else 5JVBDA^#om
insertSort(data, mid + 1, r - mid); guYP|
-M6vg4gf
for (i = l; i <= mid; i++) { EiC["M'}
temp = data; g]HxPq+O
} ]kmAN65c
for (j = 1; j <= r - mid; j++) { /<LjD
temp[r - j + 1] = data[j + mid]; !p+rU?
} EeQ8Uxb7
int a = temp[l]; y'8T=PqY[t
int b = temp[r]; \G v\&_
for (i = l, j = r, k = l; k <= r; k++) { -u%o);B
if (a < b) { faLfdUimJ
data[k] = temp[i++]; Q+K]:c
a = temp; uc!6?+0h
} else { ,B/TqPP
data[k] = temp[j--]; |tI{MztJ"c
b = temp[j]; B&X)bGx8
} J+ :3==,
} 6Zw$F3 <
} ]wV\=m?z&
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/** }])j>E
* @param data [7`S`\_NK
* @param l UV;I6]$}A7
* @param i l2Py2ZI-b
*/ $aTo9{M^
private void insertSort(int[] data, int start, int len) { {)r[?%FMgV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4%nK0FAj
} g=4P-i3
} `O3#/1+
} h6LjReNo
} t"%~r3{
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堆排序： av(qV$2
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package org.rut.util.algorithm.support; p +JOUW
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import org.rut.util.algorithm.SortUtil; w\d1
(0 t{
/** }W " i{s/
* @author treeroot u];\v%b
* @since 2006-2-2 kH0kf-4\
* @version 1.0 X J]+F
*/ 2i6P<&@
public class HeapSort implements SortUtil.Sort{ aF"PB h=
]nIVP
/* (non-Javadoc) f~=e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }o GMF~
*/ su\Lxv
public void sort(int[] data) { Aj\m57e,6
MaxHeap h=new MaxHeap(); QxEmuiN
h.init(data); O&.gc p!
for(int i=0;i h.remove(); uKIR$n"
System.arraycopy(h.queue,1,data,0,data.length); iN u k5
} <4?(|Vh[m]
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private static class MaxHeap{ !&KE">3Qu
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void init(int[] data){ }VH`\g}
this.queue=new int[data.length+1]; z9AX8k(B6
for(int i=0;i queue[++size]=data; E0r#xmk
fixUp(size); :]\-GJV5
} ezJ^ r,D|
} M#],#o*G
9J49s1
private int size=0; u`+kH8#
/6N!$*8
private int[] queue; /WAOpf5
`a7b,d
public int get() { K^AIqL8
return queue[1]; 8.`5"9Vh
} ]Ah<kq2sk
,+n{xI2
public void remove() { G"yhu +
SortUtil.swap(queue,1,size--); V,tYqhQ3
fixDown(1); ![%:X)?
} 4%jSqT@
file://fixdown It'PWqZtG
private void fixDown(int k) { 7&|&y SCu
int j; F+Hmp\rM#
while ((j = k << 1) <= size) { &eg@ZnPn
if (j < size %26amp;%26amp; queue[j] j++; W6*5e{
if (queue[k]>queue[j]) file://不用交换 .YS48 c
break; P'5Q}7
SortUtil.swap(queue,j,k); ]'i}}/}u2
k = j; #)%dG3)e
} a=^>A1=
} a,*|*Cv
private void fixUp(int k) { 98l-
while (k > 1) { 'khhn6itA
int j = k >> 1; .)=j~}\
if (queue[j]>queue[k]) >RmL0d#B
break; YQfQ[{kp
SortUtil.swap(queue,j,k); 9;pD0h|
k = j; _3Q8R}
} ~{yQsEU
} .TRp74
\G]vTK3
} qZ+^ND(I
oJ}$ /_
} /u'M7R
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SortUtil： O#D N3yu?
q&k?$rn
package org.rut.util.algorithm; 3)py|W%X$
qc^qCGy!z
import org.rut.util.algorithm.support.BubbleSort; ATU]KL!{
import org.rut.util.algorithm.support.HeapSort; 71yf+xL
import org.rut.util.algorithm.support.ImprovedMergeSort; `>}e 5
import org.rut.util.algorithm.support.ImprovedQuickSort; Zo5.Yse
import org.rut.util.algorithm.support.InsertSort; ..ht)Gex
import org.rut.util.algorithm.support.MergeSort; bU"2D.k
import org.rut.util.algorithm.support.QuickSort; a<Ptm(,
import org.rut.util.algorithm.support.SelectionSort; jP"='6Vrw
import org.rut.util.algorithm.support.ShellSort; )VR/a
yy3-Xu4
/** >9]i#So^
* @author treeroot 4ze4{a^
* @since 2006-2-2 L{i|OK^e
* @version 1.0 Rlf#)4
*/ ZzO.s$
public class SortUtil { \>XkK<ye
public final static int INSERT = 1; 6~6*(s|]A
public final static int BUBBLE = 2; 6Yx/m
public final static int SELECTION = 3; {f)"F;]V
public final static int SHELL = 4; 6/thhP3`-
public final static int QUICK = 5; 3LD`Ep
public final static int IMPROVED_QUICK = 6; 6oLq2Z8uP
public final static int MERGE = 7; y{\K:
public final static int IMPROVED_MERGE = 8; ?qjlWCV|e
public final static int HEAP = 9; !+I!J s"
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public static void sort(int[] data) { ( u}tUv3
sort(data, IMPROVED_QUICK); tqe8:\1yK
} a)Ca:p
private static String[] name={ V2|XcR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ! .|\}=[e
}; '&$xLZ8
ZiOL7#QWX
private static Sort[] impl=new Sort[]{ b6UD!tXp
new InsertSort(), jPNm $Y1
new BubbleSort(), 1 9C=' TMS
new SelectionSort(), VM[Vhk[
new ShellSort(), %CiZ>`5n#
new QuickSort(), UDz#?ZWnd
new ImprovedQuickSort(), +gOv5Eno-
new MergeSort(), :CAbGs:56
new ImprovedMergeSort(), ep2#a#&'
new HeapSort() t<2B3&o1
}; N-Nq*
GE[J`?E]
public static String toString(int algorithm){ #!X4\+)
return name[algorithm-1]; zcNv T
} ta 66AEc9
PxHHh{y%c
public static void sort(int[] data, int algorithm) { Os-sYaW
impl[algorithm-1].sort(data); H|0GRjC
} AlRng&o~
IvyBK]{|
public static interface Sort { UjU*`}k3
public void sort(int[] data); tZ]/?+1G
} }[OOkYF#r
zLiFk<G@Xi
public static void swap(int[] data, int i, int j) { 7R=cxD&
int temp = data; -?$Hr\
data = data[j]; kW@,P.88
data[j] = temp; qEoa%O
} ?xuhN G@
} J,k|_JO