[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; {8bSB.?R
} ^>v+( z5R
int i1=l; f\L0xJ
int i2=mid+1; 2.%ITB
for(int cur=l;cur<=r;cur++){ }y gD3:vN7
if(i1==mid+1) tJ$_lk ~6q
data[cur]=temp[i2++]; PtiOz :zV
else if(i2>r) >7DhTM-A
data[cur]=temp[i1++]; Fd9[pU
else if(temp[i1] data[cur]=temp[i1++]; 0*{%=M
else )|#sfHv7
data[cur]=temp[i2++]; gT6jYQ
} Ok=hT|}Y
} 5M*:}*
Wt~BU.
} \ta?b!Y),?
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改进后的归并排序: SSMHoJGm
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package org.rut.util.algorithm.support; @_}P-h
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import org.rut.util.algorithm.SortUtil; T</F 0su|
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/** <=C!VVk4f
* @author treeroot <x>Mo
* @since 2006-2-2 or}[h09qA
* @version 1.0 Z=vU}S>r|v
*/ OYn}5RN
public class ImprovedMergeSort implements SortUtil.Sort { FXkM#}RgNm
IF:;`r@%
private static final int THRESHOLD = 10; Zp=U W*g^
}b.%Im<3R
/* FJ)$f?=Qd
* (non-Javadoc) n,WqyNt*
* s`~IUNJ@P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gV_}-VvP
*/ 4~Q/"hMSkO
public void sort(int[] data) { >}6%#CAf
int[] temp=new int[data.length]; draN0vf
mergeSort(data,temp,0,data.length-1); &6nWzF
} ~oY^;/ j
svH !1b
private void mergeSort(int[] data, int[] temp, int l, int r) { 'm kLCS
int i, j, k; &&>ekG9@
int mid = (l + r) / 2; /h|#J
if (l == r) 1=Z0w +v{
return; 5VU2[ \
if ((mid - l) >= THRESHOLD) Y`a3tO=Pd
mergeSort(data, temp, l, mid); {F.[&/A
else nZYBE030
insertSort(data, l, mid - l + 1); /f;~X"!
if ((r - mid) > THRESHOLD) ak!G8'w
mergeSort(data, temp, mid + 1, r); XU(eEnmom
else 4@ai6,<
insertSort(data, mid + 1, r - mid); o0KL5].
##"HF
for (i = l; i <= mid; i++) { Oxd]y1
temp = data; ]~3V}z,T*
} -6B4sZpzD
for (j = 1; j <= r - mid; j++) { rmg}N
temp[r - j + 1] = data[j + mid]; 7J<5f)
} QhJiB%M
int a = temp[l]; 8v%o,"
int b = temp[r]; iGB}Il)
for (i = l, j = r, k = l; k <= r; k++) { Mb~F%_
if (a < b) { JZyAXm%
data[k] = temp[i++]; $*fMR,~t&
a = temp; l!u_"I8j5
} else { g]0_5?i
data[k] = temp[j--]; P-"y3 ZE=
b = temp[j]; 7zG_(83)K
} [.wYdv35
} xU`p|(SS-
} H9e<v4c
{R6ZKB
/** $6SW;d+>n
* @param data R8'RA%O9J
* @param l Ds:'Lb
* @param i rFL;'Cj@
*/ t1x1,SL
private void insertSort(int[] data, int start, int len) { @~a%/GQ#n*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TarY|P7_
} 1iF1GkLEq
} pYf-S?Y/V
} Qzw;i8n{
} /mzlH
i=2N;sAl
堆排序： P5ywhw-
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package org.rut.util.algorithm.support; f4|rVP|x
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import org.rut.util.algorithm.SortUtil; t"oeQ*d%
92oFlEJ
/** 8KzkB;=n
* @author treeroot 13x p_j
* @since 2006-2-2 `VguQl_,gA
* @version 1.0 Otn1wBI
*/ =@~Y12o?%
public class HeapSort implements SortUtil.Sort{ K]w'&Qm8W
T]~xj4
/* (non-Javadoc) pTLCWbF?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6.yu-xm
*/ x7 ,5
public void sort(int[] data) { |P?*5xPB
MaxHeap h=new MaxHeap(); AFwdJte9e
h.init(data); uQKT
for(int i=0;i h.remove(); YPI-<vM~
System.arraycopy(h.queue,1,data,0,data.length); O0H.C0}
} z+X}HL
b@hqz!)l`
private static class MaxHeap{ '!B&:X)
5\VWCI
void init(int[] data){ c@L< Z`u
this.queue=new int[data.length+1]; ~((O8@}J
for(int i=0;i queue[++size]=data; F*ylnB3z
fixUp(size); DkDmE
} l+0oS'`V*L
} =[7Av>
8zW2zkv2|#
private int size=0; +9sQZB# (
[j+sC*
private int[] queue; U8$27jq
sc#qwQ#
public int get() { 1 [Bk%G@D&
return queue[1]; 1T n}
} ?(_08O
gL/9/b4
public void remove() { `C'H.g\>2Q
SortUtil.swap(queue,1,size--); #&e-|81H
fixDown(1); QS;f\'1bb
} +]{G@pn
file://fixdown &s>Jb?_5Mx
private void fixDown(int k) { S)"Jf?
int j; )MT}+ai
while ((j = k << 1) <= size) { @gK?\URoT
if (j < size %26amp;%26amp; queue[j] j++; ^E>3|du]O
if (queue[k]>queue[j]) file://不用交换 ~WF\
break; 7D_=
SortUtil.swap(queue,j,k); +G>\-tjSD
k = j; uHRsFlw
} !&@615Vtw
} 4 s9LB
private void fixUp(int k) { t\O16O7S
while (k > 1) { !^G\9"4A
int j = k >> 1; ]7c=PC
if (queue[j]>queue[k]) R`-S/C
break; MVUJD{X#
SortUtil.swap(queue,j,k); <b*DQ:N
k = j; A?OQE9'
} &_8947
} }"%N4(Kd
M&M6;Ph
} ~v6D#@%A
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} @BMx!r5kn
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SortUtil： b" [|:F>P
#fM`}Ij.A
package org.rut.util.algorithm; P16~Qj
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import org.rut.util.algorithm.support.BubbleSort; %E;'ln4h&,
import org.rut.util.algorithm.support.HeapSort; Z0r'S]fe
import org.rut.util.algorithm.support.ImprovedMergeSort; yEy6]f+>+
import org.rut.util.algorithm.support.ImprovedQuickSort; \o3gKoL%
import org.rut.util.algorithm.support.InsertSort; m+$VVn3Z}
import org.rut.util.algorithm.support.MergeSort; KwVbbC3
import org.rut.util.algorithm.support.QuickSort; t"I77aZ$A
import org.rut.util.algorithm.support.SelectionSort; 1X1dG#:
import org.rut.util.algorithm.support.ShellSort; *|HY>U.
)0k53-h&
/** C9)@jK%
* @author treeroot E=O\0!F|b
* @since 2006-2-2 [dVL&k<P
* @version 1.0 bpa?C
*/ 3=V&K-
public class SortUtil { 'dc#F3
public final static int INSERT = 1; 1Ai^cf:S
public final static int BUBBLE = 2; b%c9oR's^
public final static int SELECTION = 3; o^wqFX(Y
public final static int SHELL = 4; tfWS)y7
public final static int QUICK = 5; %\:Wi#w>
public final static int IMPROVED_QUICK = 6; .x&%HA
public final static int MERGE = 7; u)Whr@m
public final static int IMPROVED_MERGE = 8; 8H`[*|{'
public final static int HEAP = 9; ]hV*r@d
&BSn?
public static void sort(int[] data) { 9;If&uM
sort(data, IMPROVED_QUICK); w&.aQGR#
} M D#jj3y
private static String[] name={ 0b 54fD=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #T"4RrR
}; 3PF_H$`oJ
V|R,!UND
private static Sort[] impl=new Sort[]{ (^>J&[=
new InsertSort(), B`sAk %
new BubbleSort(), ?gXp*>Kg[
new SelectionSort(), 1{.9uw"2S
new ShellSort(), X5w$4Kj&4l
new QuickSort(), :rP=t ,
new ImprovedQuickSort(), asqV~n
new MergeSort(), 9A#i_#[R
new ImprovedMergeSort(), >8[Z.fX
new HeapSort() z'7]h TA
}; y>ktcuML
)O6>*wq
public static String toString(int algorithm){ z0Z%m@
return name[algorithm-1]; !dT4
} 5~S5F3
lNv|M)I
public static void sort(int[] data, int algorithm) { s,_m{ to
impl[algorithm-1].sort(data); Rk8P ax/JK
} NX&_p!_V
dQG=G%W
public static interface Sort { 2 ? 4!K.
public void sort(int[] data); :~SyL!
} J9 I:Q<;
_(zG?]y0P
public static void swap(int[] data, int i, int j) { GKeU%x
int temp = data; 4 H&#q>
data = data[j]; DW3G
data[j] = temp; FC4wwzb
} f,Ghb~y
} !TcJ)0