[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; 7x]q>Y8T
} -jzoGzC3
int i1=l; u2OrH3E4E3
int i2=mid+1; 26p_fKY
for(int cur=l;cur<=r;cur++){ ?Y 5Vje[^
if(i1==mid+1) ehLn+tg
data[cur]=temp[i2++]; J+TtM>
else if(i2>r) {e1sq^>|
data[cur]=temp[i1++]; X]D:vuB
else if(temp[i1] data[cur]=temp[i1++]; C`-CfZZ
else @;tM R|p
data[cur]=temp[i2++]; x)pR^t7u8
} m/q`k
} \Xe{vlo>h
r$<M*z5q(\
} ktkS$
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改进后的归并排序: %)Z,?DzZ
$rJgBN
package org.rut.util.algorithm.support; k7& cc|y
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import org.rut.util.algorithm.SortUtil; 3a&HW JBSx
[{>3"XJ'
/** FOteNQTj
* @author treeroot 1SH]$V4C
* @since 2006-2-2 \;iOQqv0&
* @version 1.0 p(cnSvg
*/ E.*gKfL
public class ImprovedMergeSort implements SortUtil.Sort { BY9Z}/{j
DXFDs=u
private static final int THRESHOLD = 10; do9~#F
v(6[z)A0
/* qDqy9u:g
* (non-Javadoc) #guK&?Fye
* G.$KP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fQ1Dp
*/ e}n(mq
public void sort(int[] data) { mmG]|Cl@
int[] temp=new int[data.length]; o+L[o_er
mergeSort(data,temp,0,data.length-1); m2&Vm~Py6b
} I`s~.fZt
"3'a.b akw
private void mergeSort(int[] data, int[] temp, int l, int r) { \qTp#sF
int i, j, k; `l6OQdB3W
int mid = (l + r) / 2; 0~P]Fw^w
if (l == r) ;mg.} fI
return; ?]aVRmL
if ((mid - l) >= THRESHOLD) 8hYl73#
mergeSort(data, temp, l, mid); a^\F9^j
else g}IOHE
insertSort(data, l, mid - l + 1); zl|+YjR
if ((r - mid) > THRESHOLD) Qn~{TZz
mergeSort(data, temp, mid + 1, r); \y6Y}Cv
else ko|M2\
insertSort(data, mid + 1, r - mid); &gr T@
p8"C`bCf
for (i = l; i <= mid; i++) { cm!|A?-<
temp = data; eA{A3.f"Hz
} 72/ bC
for (j = 1; j <= r - mid; j++) { -8vGvI>
temp[r - j + 1] = data[j + mid]; Y;iI=U
} |onLJY7)
int a = temp[l]; s Ytn'&$\
int b = temp[r]; 4>2\{0r
for (i = l, j = r, k = l; k <= r; k++) { |`pBI0Sjo
if (a < b) { <WnIJum
data[k] = temp[i++]; #DARZhU)
a = temp; m%UF{I,
} else { ^6Zx-Mf\
data[k] = temp[j--]; wp'[AR}
b = temp[j]; feH&Ug4?G
} g-,lY|a
} -[&Z{1A4x4
} f,|;eF-Z
Y^C(<N$
/** 2 E?]!9T~|
* @param data OH@gwC
* @param l 2Nx:Y+[
* @param i 9P,[MZ
*/ JG&E"j#q
private void insertSort(int[] data, int start, int len) { 6`%|-o :
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LpI4R
} %%I:L~c
} N"tX K
} DZ4gp
} 9Y2.ob!$}
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堆排序： x>,wmk5)
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package org.rut.util.algorithm.support; dcTZL$
#xq3)B
import org.rut.util.algorithm.SortUtil; VKfpk^rU
w`r%_o-I
/** g/WDAO?d
* @author treeroot ZoYllk
* @since 2006-2-2 w~+\Mfz
* @version 1.0 Jr%F#/
*/ WnU2.:
public class HeapSort implements SortUtil.Sort{ qrjSG%i~J7
j=G
/* (non-Javadoc) Fe+(+ S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YMy**
*/ W#kyD)(F
public void sort(int[] data) { iQ1[60?)T
MaxHeap h=new MaxHeap(); Wb#<ctM>
h.init(data); VC_F Cz
for(int i=0;i h.remove(); =v!Z8zk=W
System.arraycopy(h.queue,1,data,0,data.length); 8kr$w$=q
} 9$qw&j[
-e?n4YO*\
private static class MaxHeap{ VKw.g@BY
?R4u>AHS@
void init(int[] data){ \zBZ$5 rE
this.queue=new int[data.length+1]; Jt0/*^'
for(int i=0;i queue[++size]=data; H6>tto
fixUp(size); U%Hcck'
} nv7)X2jja
} }sJ}c}b
m(dW["8D
private int size=0; fZS'e{V
R?,v:S&i7;
private int[] queue; <0m^b#hdG
>WJQxL4
public int get() { }6 u)wF5
return queue[1]; "vkM*HP
} r+6 DlT a
@3 +
public void remove() { q4'`qe
SortUtil.swap(queue,1,size--); 7l09
fixDown(1); ^^24a_+2
} d_f*'M2Gv
file://fixdown (&V)D?/hS
private void fixDown(int k) { |Q@(<'8=
int j; ftRdK>a D
while ((j = k << 1) <= size) { =Lb(N61
if (j < size %26amp;%26amp; queue[j] j++; /UY'E<wBx
if (queue[k]>queue[j]) file://不用交换 BT^=p
break; nB[B FVkU
SortUtil.swap(queue,j,k); 0S }\ML
k = j; 4PR&67|AH_
} 09 f;z
} MSp)Jc
private void fixUp(int k) { F x$W3FIO]
while (k > 1) { %s5(''a.
int j = k >> 1; blP8"(U
if (queue[j]>queue[k]) NXz/1ut%
break; BPKrRex
SortUtil.swap(queue,j,k); >{A)d<
k = j; nE0I[T(
} |%rRALIY
} xc05GJ
G=CP17&h6
} ;NAKU
jaVx9FR+
} >}C:EnECy
1N{ >00
SortUtil： h+cOOm-)
VP?Q$?a
package org.rut.util.algorithm; a^X% (@Sg
Nv=%R
import org.rut.util.algorithm.support.BubbleSort; y1Wb/ d
import org.rut.util.algorithm.support.HeapSort; \q^dhY>)
import org.rut.util.algorithm.support.ImprovedMergeSort; 4(Y-TFaf
import org.rut.util.algorithm.support.ImprovedQuickSort; uKJo5%>
import org.rut.util.algorithm.support.InsertSort; EpCNp FQT<
import org.rut.util.algorithm.support.MergeSort; $bBUL C
import org.rut.util.algorithm.support.QuickSort; CG J_k?h
import org.rut.util.algorithm.support.SelectionSort; ]n'.}"8Kn
import org.rut.util.algorithm.support.ShellSort; 1-<?EOYaE
!wKNYe
/** ?i!d00X
* @author treeroot >>;He7
* @since 2006-2-2 >m=XqtP
* @version 1.0 v0;dk(
*/ ]C|xo.=?]
public class SortUtil { .Rb1%1bdc
public final static int INSERT = 1; N>g6KgX{K
public final static int BUBBLE = 2; ;qUd]c9oi
public final static int SELECTION = 3; 0&Iu+hv
public final static int SHELL = 4; bHTTxZ-%
public final static int QUICK = 5; X)c0y3hk
public final static int IMPROVED_QUICK = 6; -:Juxh
public final static int MERGE = 7; 9`@}KnvB?
public final static int IMPROVED_MERGE = 8; @)z?i
public final static int HEAP = 9; AvuGAlP
p}K+4z
public static void sort(int[] data) { 1p SEr6
sort(data, IMPROVED_QUICK); a+9_sUq
} wLg@BSC.
private static String[] name={ Y]B9*^d<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q'Y)Y(d
}; u=#_8e(9Z
Cs,t:ajP
private static Sort[] impl=new Sort[]{ v|jwz.jM
new InsertSort(), [W dxMU
new BubbleSort(), c.>OpsF
new SelectionSort(), _PP-'^ U
new ShellSort(), 8p/&_<mnW
new QuickSort(), :&RpB^]
new ImprovedQuickSort(), 6HpiG`
new MergeSort(), :D !/.0
new ImprovedMergeSort(), =trLL+vGw'
new HeapSort() fCv.$5
}; -9s&OKo`({
H]M[2C7#N
public static String toString(int algorithm){ nQfSQMg
return name[algorithm-1]; ytfr'sr/
} 9~l8QaK
xR&Le/3+
public static void sort(int[] data, int algorithm) { 1nE`Wmo.2
impl[algorithm-1].sort(data); ,twm)%caU
} G49`a*Jn
!4$o*{9Lx:
public static interface Sort { "T>;wyGW
public void sort(int[] data); }\W^$e-
} o'YK\L!p
quq!Jswn
public static void swap(int[] data, int i, int j) { 8ROZ]Xh,x
int temp = data; 1{h,LR
data = data[j]; }. V!|R,
data[j] = temp; U-q:Y-h
} 5j5}c`:
} Y}r UVn