[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; A;\1`_i0
} W-UMX',0zS
int i1=l; 1#m'u5L
int i2=mid+1; pi|P&?yw
for(int cur=l;cur<=r;cur++){ mtunD;_Dek
if(i1==mid+1) *(>,\8OVf
data[cur]=temp[i2++]; N(W;\>P
else if(i2>r) AZgeu$:7p<
data[cur]=temp[i1++]; _>k&M7OU4
else if(temp[i1] data[cur]=temp[i1++]; -fm1T|>#
else xS>d$)rIj
data[cur]=temp[i2++]; W3.(s~)o
} &ap&dM0@%a
} C ks;f6G
do$+ Eh
} :U!@
c1x{$
改进后的归并排序: Vw>AD<Rl
rUL_=>3
package org.rut.util.algorithm.support; iS]4F_|vd
4[VW~x07
import org.rut.util.algorithm.SortUtil; YooPHeQ
}\$CU N
/** h%*@82DKK
* @author treeroot d(X/N2~g
* @since 2006-2-2 }8e_
* @version 1.0 aF!Im}
*/ YQ7\99tj
public class ImprovedMergeSort implements SortUtil.Sort { )nM<qaI{
gL(_!mcwu
private static final int THRESHOLD = 10; 49?wEm#
yRyUOTK
/* mQka?_if)
* (non-Javadoc) k+5l
* ^1mnw@04
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LyuA("xB#
*/ Qt+i0xd
public void sort(int[] data) { 3"O&IY<
int[] temp=new int[data.length]; Zb4+zps^-
mergeSort(data,temp,0,data.length-1); F+Dke>j
} + \jn$>E
Mc@_[q!xY?
private void mergeSort(int[] data, int[] temp, int l, int r) { 9pMXjsE
int i, j, k; `37%|e3bQ
int mid = (l + r) / 2; 7zcmv"`
if (l == r) b'1m 9T780
return; 57jDsQAj
if ((mid - l) >= THRESHOLD) o5;|14O
mergeSort(data, temp, l, mid); dIq*"Ry+~
else !~_6S*~
insertSort(data, l, mid - l + 1); m8,jVR
if ((r - mid) > THRESHOLD) qp{3I("_
mergeSort(data, temp, mid + 1, r); j^)=<+Q;=
else $g&_7SJ@
insertSort(data, mid + 1, r - mid); U_C[9Z'P
9 K~X+N\
for (i = l; i <= mid; i++) { U:q4OtiP
temp = data; l[Ko>
} b`fWT:?=
for (j = 1; j <= r - mid; j++) { KSve_CBOh
temp[r - j + 1] = data[j + mid]; o\N^Uu
} :/\KVz'fw}
int a = temp[l]; r*kz`cJ
int b = temp[r]; q"-+`;^7(-
for (i = l, j = r, k = l; k <= r; k++) { d04fj/B
if (a < b) { 08_<G`r
data[k] = temp[i++]; >>T,M@s-:
a = temp; ?.g="{5X
} else { /}Ct2w&<k
data[k] = temp[j--]; X3j|J/
b = temp[j]; S76xEL
} Z5`U+ (
} J?/NJ-F
} ^0(`:*
i;<K)5Z
/** p?#xd!tc2N
* @param data `,s0^?_
* @param l $xK(bc'{
* @param i |]'gd)%S\
*/ ~)#xOE}
private void insertSort(int[] data, int start, int len) { hY/i)T{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (G 9Ku 8Y
} nnuJY$O;M
} ]htx9ds=
} kPYQcOK8
} (Eo#oX
@#::C@V]
堆排序： uWkuw5;
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package org.rut.util.algorithm.support; ;5:3 =F>ao
[(iJj3s!
import org.rut.util.algorithm.SortUtil; )%bY2 pk
eo<=Q|nI&
/** @O| lA
* @author treeroot fvM|Jb
* @since 2006-2-2 2l}3L
* @version 1.0 fH 0&Wc3yC
*/ 24I~{Qy
public class HeapSort implements SortUtil.Sort{ \SA$:^zO
x<>In"QV
/* (non-Javadoc) 2rqYm6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h"(HDnq
*/ dUP8[y
public void sort(int[] data) { aZL FsSY
MaxHeap h=new MaxHeap(); 6@J)kV
h.init(data); 0[!38
for(int i=0;i h.remove(); AjMx\'(C
System.arraycopy(h.queue,1,data,0,data.length); $-lP"m@}
} CDGN}Q2_
J}s)#va9R
private static class MaxHeap{ ym6gj#2m
22"/|S
void init(int[] data){ [ FNA:
this.queue=new int[data.length+1]; LE@`TPg$R
for(int i=0;i queue[++size]=data; Y?V>%eBu
fixUp(size); 3QD##Wr^
} X]v.Yk=wu
} |d=MX>i|G
`+EjmY
private int size=0; Uv(Uj3D
qJLtqv
private int[] queue; 4&^BcWqA*f
TkV*^j5
public int get() { &HYs^|ydrr
return queue[1]; CDgu`jj%]
} ($Y6hn+
\F8*HPM=*
public void remove() { *8j2iu-|
SortUtil.swap(queue,1,size--); exL<cN
fixDown(1); w|WehNGr
} 9|RR;k[
file://fixdown ]BBL=$*
private void fixDown(int k) { "+:~#&r
int j; j?'It`s
while ((j = k << 1) <= size) { Jp]eFaqp
if (j < size %26amp;%26amp; queue[j] j++; :,BKB*a\
if (queue[k]>queue[j]) file://不用交换 Ae 3:"
break; s7}46\/U
SortUtil.swap(queue,j,k); A?/(W_Gt^M
k = j; 8^%Nl `_2B
} 0N19R5NN8
} Ff@Cs0R
private void fixUp(int k) { 9Lv"|S`5W_
while (k > 1) { +$H`/^a.
int j = k >> 1; cN\Fgbt
if (queue[j]>queue[k]) \%+5p"Z<
break; v\:P_J
SortUtil.swap(queue,j,k); BR [3i}Ud
k = j; o7;#B)jWS
} (5(TbyWwD
} f]Q`8nU
!*@sX7H
} :gJ?3LwTf
8Mf{6&F=
} .#[==
U%nLo[k
SortUtil： Vy7o}z`
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package org.rut.util.algorithm; @?r[ $Ea1M
YXr"
import org.rut.util.algorithm.support.BubbleSort; QZs ]'*=#
import org.rut.util.algorithm.support.HeapSort; ^*=.Vuqy
import org.rut.util.algorithm.support.ImprovedMergeSort; #[C=LGi
import org.rut.util.algorithm.support.ImprovedQuickSort; kg^VzNX
import org.rut.util.algorithm.support.InsertSort; wfXm(RYM
import org.rut.util.algorithm.support.MergeSort; vz-O2B_u
import org.rut.util.algorithm.support.QuickSort; zZax![Z
import org.rut.util.algorithm.support.SelectionSort; R#x~f
import org.rut.util.algorithm.support.ShellSort; F$k^px
NP#:} )
/** awic9uMH
* @author treeroot ~d072qUos
* @since 2006-2-2 Lm{qFu
* @version 1.0 A3|hFk
*/ R@8pKCL.
public class SortUtil { GZwz4=`
public final static int INSERT = 1; _sGmkJi]
public final static int BUBBLE = 2; 'M'k$G@Z
public final static int SELECTION = 3; NM{/rvM
public final static int SHELL = 4; mhDC1lXF
public final static int QUICK = 5; Oe["4C
public final static int IMPROVED_QUICK = 6; 74p=uQ
public final static int MERGE = 7; /)<x<7FKW
public final static int IMPROVED_MERGE = 8; G)G 257K"~
public final static int HEAP = 9; Ey#7L M)
(rfR:[JkC2
public static void sort(int[] data) { ac%6eW0#
sort(data, IMPROVED_QUICK); P<5v\\
} Ump$N#
private static String[] name={ .*Mp+Q}^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0Kytg\p}
}; IGQcQ/M
[Ep%9(SgA'
private static Sort[] impl=new Sort[]{ L<62-+e`
new InsertSort(), !w;oVPNg
new BubbleSort(), =+z+`ot
new SelectionSort(), ]~K&b96(
new ShellSort(), Id}/(Pkq
new QuickSort(), rijavZS6
new ImprovedQuickSort(), Oe~x,=X)
new MergeSort(), "!w#E6gU
new ImprovedMergeSort(), @$aGVEcU$
new HeapSort() o^ zrF
}; sW^e D;
!Soz??~o/
public static String toString(int algorithm){ =f/CBYNw@V
return name[algorithm-1]; VchI0KL?
} srCpgs]h
!*eDT4a
public static void sort(int[] data, int algorithm) { I?&/J4o:
impl[algorithm-1].sort(data); 4'wbtE|
} {)jTq??
K'_qi8Z
public static interface Sort { .C*mDi)wZ
public void sort(int[] data); ~jR4%VF
} teKx^ 'c'
U #C@&2
public static void swap(int[] data, int i, int j) { xWnOOE$i
int temp = data; cE;n>ta"F
data = data[j]; mPL0s
data[j] = temp; xfa-
} 5MCnGg@
} ({OQ JBC