[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; `+]4C+w
} BhdJ/C^
int i1=l; FeSe^^dW
int i2=mid+1; a8Ci 7<V
for(int cur=l;cur<=r;cur++){ oqUtW3y
if(i1==mid+1) g<}K^)x
data[cur]=temp[i2++]; [gH vI
else if(i2>r) =<a`G3SY!
data[cur]=temp[i1++]; FS1<f:
else if(temp[i1] data[cur]=temp[i1++]; \7gLk:
else 9Z rWG
data[cur]=temp[i2++]; ;t"#7\
} bnUd !/;
} =3/||b4c
j<wg>O:s%r
} ` [@ F3x
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改进后的归并排序: QXgh[9wG
!:rQ@PSy9
package org.rut.util.algorithm.support; h7I_{v8
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import org.rut.util.algorithm.SortUtil; *>S\i7RET
Td"f(&Hk&
/** }2V|B4
* @author treeroot 3x'BMAA+
* @since 2006-2-2 *Swb40L^
* @version 1.0 b/5;377_
*/ rJ9a@n,
public class ImprovedMergeSort implements SortUtil.Sort { GaM#a[p
k gWF@"_
private static final int THRESHOLD = 10; rDUNA@r
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/* >8>`-
* (non-Javadoc) Qmzj1e$6x
* >!`T=(u!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e)7[weGN
*/ ,C(")?4aJ
public void sort(int[] data) { &``;1/J*W
int[] temp=new int[data.length]; _YO`x
mergeSort(data,temp,0,data.length-1); @ZD1HA,h"
} *vUKh^="
tY%c-m
private void mergeSort(int[] data, int[] temp, int l, int r) { zOWbdd_zl
int i, j, k; f:Ju20D
int mid = (l + r) / 2; @x"vGYKd
if (l == r) [S-NGip
return; rv:,Os_
if ((mid - l) >= THRESHOLD) $&k zix
mergeSort(data, temp, l, mid); vL\wA_z"<H
else XSn^$$S
insertSort(data, l, mid - l + 1); GfL}f9
if ((r - mid) > THRESHOLD) r$R(4q:
mergeSort(data, temp, mid + 1, r); (Dq3e9fX
else L;E9"7Jo
insertSort(data, mid + 1, r - mid); [ ecYpE<
Bb8lklQ
for (i = l; i <= mid; i++) { 6-QTqb?U;N
temp = data; 1th|n
} >Y)jt*vQ
for (j = 1; j <= r - mid; j++) { FU5vo
temp[r - j + 1] = data[j + mid]; |UBR8
} !-LPFy>
int a = temp[l]; ]%ikr&78u
int b = temp[r]; 4+'yJ9~,B
for (i = l, j = r, k = l; k <= r; k++) { {u3^#kF
if (a < b) { :}e*3={4
data[k] = temp[i++]; )5Gzk&|
a = temp; 6_`x^[r
} else { GT<Y]Dk
data[k] = temp[j--]; H@,jNIh~h
b = temp[j]; Gvl-q1PVC
} X2q$i
} @M:j~
} {$oZR"MP
(9fqUbG
/** V5qvH"^
* @param data &6r".\;^
* @param l Qh%7RGh_
* @param i ?fCLiK
*/ l J;wl|9
private void insertSort(int[] data, int start, int len) { L7%Dc2{^(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I zM=?,`
} 1LT)%_d@
} tiI>iP`!
} FzA_-d/_dg
} j#3}nJB%#i
^HX={(ddK
堆排序： >2vl & (
!`)-seTm
package org.rut.util.algorithm.support; cC&R~h]|
6wIv7@Y
import org.rut.util.algorithm.SortUtil; kHm1aE<
dkLc"$(O
/** *N[.']#n
* @author treeroot O&E1(M|*>
* @since 2006-2-2 FFK79e/5
* @version 1.0 9k&lq$
*/ #O\4XZ,Lv
public class HeapSort implements SortUtil.Sort{ DIkD6n?V
:sk7`7v
/* (non-Javadoc) %:YON,1b=7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p_!Y:\a5
*/ \*v}IO>2})
public void sort(int[] data) { Ga+\b>C
MaxHeap h=new MaxHeap(); K>w}(td
h.init(data); +\\*Iy'xK
for(int i=0;i h.remove(); IP-CN
System.arraycopy(h.queue,1,data,0,data.length); ^qy$M>
} +2|X 7wA
)p(5$AR7
private static class MaxHeap{ \aU^c24>
K>,Kbs=D6
void init(int[] data){ Y%anR|
this.queue=new int[data.length+1]; zf5s\w.4
for(int i=0;i queue[++size]=data; !|}J{
fixUp(size); A5F< <
} 3@XCP-`
} 9kH~+
C>:F4"0
private int size=0; }8fxCW*|
ipw_AC~
private int[] queue; tA3]6SIK@
0$":W
public int get() { ](x4q
return queue[1]; G5kM0vs6L
} R^f~aLl
nwOr
public void remove() { |hiYV
SortUtil.swap(queue,1,size--); +}I[l,,xy
fixDown(1); 9K Ih}Q@P
} pvDr&n9
file://fixdown HJ !)D~M{
private void fixDown(int k) { zVGjXuNa
int j; 42Tjbten_u
while ((j = k << 1) <= size) { zi:GvTG
if (j < size %26amp;%26amp; queue[j] j++; \G#Qe*"'K
if (queue[k]>queue[j]) file://不用交换 r*0a43mC1
break; U@ALo
SortUtil.swap(queue,j,k); `(_cR@\
k = j; &:S_ewJK7
} N+"Y@X yg
} "5synfO
private void fixUp(int k) { jE&kN$.7j
while (k > 1) { |Rhx&/
int j = k >> 1; .%U~ r2Y(
if (queue[j]>queue[k]) -EF(J
break; $io-<Z#Q
SortUtil.swap(queue,j,k); InH R>,
k = j; cx_[Y
} =c(_$|0
} 4CW/
U#Wc!QN-t
} uQ vW@Tt
Gyjx:EM
} 5l=B,%s
pyT+ba#
SortUtil： Z,lUO.
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package org.rut.util.algorithm; }2:bYpYQ
)gmDxD ^C
import org.rut.util.algorithm.support.BubbleSort; fB3O zff
import org.rut.util.algorithm.support.HeapSort; X']>b
import org.rut.util.algorithm.support.ImprovedMergeSort; _-o*3gmbQ
import org.rut.util.algorithm.support.ImprovedQuickSort; +h9UV
import org.rut.util.algorithm.support.InsertSort; +&4PGv53J
import org.rut.util.algorithm.support.MergeSort; E,c~.jYc
import org.rut.util.algorithm.support.QuickSort; f8#WT$Ewy
import org.rut.util.algorithm.support.SelectionSort; 6!n"E@Bwu
import org.rut.util.algorithm.support.ShellSort; L`R,4mI.W
CbQ@l@d]
/** bv\V>s
* @author treeroot xGk@BA=0<
* @since 2006-2-2 n{r+t=X
* @version 1.0 %,K|v
*/ V~Tjz%<
public class SortUtil { W ;P1T"*A
public final static int INSERT = 1; 'uo`-Y
public final static int BUBBLE = 2; u5H#(&Om
public final static int SELECTION = 3; }<2F]UuR
public final static int SHELL = 4; a_waLH/
public final static int QUICK = 5; }(ay(
public final static int IMPROVED_QUICK = 6; Te[[xhTyw
public final static int MERGE = 7; j /)cdP
public final static int IMPROVED_MERGE = 8; pEH[fA]
public final static int HEAP = 9; T55l-.>
)_GM&-
public static void sort(int[] data) { ]WWre},
sort(data, IMPROVED_QUICK); !Ya +
} ~_8Ve\Y^/
private static String[] name={ x3PeU_9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TbIM{X
}; ?9H7Twi+T
**_VNDK+
private static Sort[] impl=new Sort[]{ |GdA0y\v*}
new InsertSort(), +A~lPXAXW
new BubbleSort(), #xW%RF
new SelectionSort(), <j:3<''o
new ShellSort(), XhWMvme
new QuickSort(), l]sO[`X
new ImprovedQuickSort(), 4=o3ZRV
new MergeSort(), (pi7TSJ
new ImprovedMergeSort(), {)4Vv`n
new HeapSort() F#X\}MvEU
}; ;f=:~go
.7ahz8v
public static String toString(int algorithm){ u+I-!3J87
return name[algorithm-1]; {@Diig
} )6bxP&k
sn5N9=\+T
public static void sort(int[] data, int algorithm) { Ct}"o
impl[algorithm-1].sort(data); hf:n!+,C
} &Eidc .
a(x[+ El
public static interface Sort { aCGPtA'
public void sort(int[] data); _9!Ru!u~
} k_P`t[YZV
M?[lpH3
public static void swap(int[] data, int i, int j) { JO :m: M
int temp = data; 3C_g)5 _:
data = data[j]; )@R:$l86
data[j] = temp; }^`{YD
} Gk[P-%%b /
} .8b4