[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; t^2$ent
} RY1-Zjlb<
int i1=l; |{RCvm
int i2=mid+1; m}f{o
for(int cur=l;cur<=r;cur++){ KL*+gq0k
if(i1==mid+1) cM\BEhh
data[cur]=temp[i2++]; $LG.rJ/*
else if(i2>r) p.H`lbVY
data[cur]=temp[i1++]; e7tio!
else if(temp[i1] data[cur]=temp[i1++]; 9i D&y)$"
else kh8 M=
data[cur]=temp[i2++]; a-AA$U9hj
} _#uRKy<`N
} .EvP%A m
,1]VY/
} =dmxE*C
'v=BAY=Ef
改进后的归并排序: GIfs]zVr`
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package org.rut.util.algorithm.support; Vy^mEsQC+h
mX, @yCI
import org.rut.util.algorithm.SortUtil; K92M9=>
d,Oe3?][0p
/** kWs:7jiiu
* @author treeroot +n)bWB%
* @since 2006-2-2 ad9u;uS
* @version 1.0 b@sq}8YD|z
*/ i[w&!mn%
public class ImprovedMergeSort implements SortUtil.Sort { ;iJ}[HUo
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private static final int THRESHOLD = 10; $Rn9*OKr
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/* b,'rz04^
* (non-Javadoc) ;yCtk ~T%
* 1_StgFu u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aC<fzUD;
*/ )Y"t$Iw"
public void sort(int[] data) { s?fEorG
int[] temp=new int[data.length]; 1v<uA9A%[
mergeSort(data,temp,0,data.length-1); AgB$ w4
} KXUJ*l-5
Q8]S6,pt
private void mergeSort(int[] data, int[] temp, int l, int r) { 4{b/Nv:b
int i, j, k; }:1qK67S
int mid = (l + r) / 2; ;<%d^
if (l == r) xsrdHP1
return; \lyHQ-gWhc
if ((mid - l) >= THRESHOLD) g91xUG
mergeSort(data, temp, l, mid); q^~w:$^U
else 'C;KNc
insertSort(data, l, mid - l + 1); RER93:(
if ((r - mid) > THRESHOLD) qQS&K%F
mergeSort(data, temp, mid + 1, r); FY]Et=p
else Hl8\*#;C&>
insertSort(data, mid + 1, r - mid); u!b0<E
MW=rX>tE
for (i = l; i <= mid; i++) { "L9pFz</
temp = data; 6c}nP[6|
} WckWX]};S
for (j = 1; j <= r - mid; j++) { :z$+leNH\
temp[r - j + 1] = data[j + mid]; 6']WOM#
} -NDB.~E^DJ
int a = temp[l]; q@Zeu\T,*#
int b = temp[r]; uiWo<}t}{
for (i = l, j = r, k = l; k <= r; k++) { lvUWs
if (a < b) { |8{\j*3
data[k] = temp[i++]; |1T[P)Q
a = temp; ;3Q3!+%j
} else { 9v7}[`^
data[k] = temp[j--]; @^HZTuP2;
b = temp[j]; ^n\g,
} c2d1'l]n
} qf%p#+:B3
} .;&4'ga4
}IKU^0M9<T
/** yQC8Gt8
* @param data E FBvi
* @param l t<+gyAW
* @param i <h`}I3Ao
*/ (T",6xBSG
private void insertSort(int[] data, int start, int len) { x0xQFlGk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yeV|j\TJI.
} SqoO"(1x
} c2yZvi
} IY|>'}UU#
} ~vfPsaRh
=8DS~J{
堆排序： OL623jQX
1c$ce+n~
package org.rut.util.algorithm.support; 1*B'o<?P1
H7Pw>Ta ;
import org.rut.util.algorithm.SortUtil; ;GZ'Rb
.3xf!E*
/** s18A
* @author treeroot 8ZDWaq8^2N
* @since 2006-2-2 et`rPK~m
* @version 1.0 ,*;g+[Bhpl
*/ a,[NcdG
public class HeapSort implements SortUtil.Sort{ H(Ad"1~.#
CrX1qyR
/* (non-Javadoc) ABhQ7 x|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -4S4I
*/ !Ee&e~"
public void sort(int[] data) { [uu<aRAg3O
MaxHeap h=new MaxHeap(); ZZW%6-B
h.init(data); iM{cr&0
for(int i=0;i h.remove(); kfy|3KA3m
System.arraycopy(h.queue,1,data,0,data.length); ?O/!pUAu
} .Kk'N
"%+9p6/
private static class MaxHeap{ ?;p45y~n%
M V~3~h8
void init(int[] data){ 'zYx4&s
this.queue=new int[data.length+1]; 6am<V]Hw0F
for(int i=0;i queue[++size]=data; 8' +I8J0l
fixUp(size); $eh>.c'&]
} uq@_DPA7
} <#7j~<
qLm g18
private int size=0; O)}5`0@L
@86I|cY
private int[] queue; Yfx'7gj
THnZbh4#)
public int get() { W/<C$T4
return queue[1]; 4G=KyRKh
} DX8pd5U
+rOd0?
public void remove() { hdxq@%Vs
SortUtil.swap(queue,1,size--); -2*Pm1\Z
fixDown(1); >66v+
} SR {KL#NC
file://fixdown Z`kI6
private void fixDown(int k) { $U}GX'1LZ
int j; <qCfw>%2F
while ((j = k << 1) <= size) { ~ ^)4*@i6
if (j < size %26amp;%26amp; queue[j] j++; z4*`K4W
if (queue[k]>queue[j]) file://不用交换 P:v|JER
break; g2GHsVS
SortUtil.swap(queue,j,k); 2k"!o~s^
k = j; NEX{vZkgw
} @#&y
} ,$;pLjo6
private void fixUp(int k) { kY`L[1G$
while (k > 1) { i 9wk)
int j = k >> 1; WhN~R[LE_
if (queue[j]>queue[k]) Fs;_z9ej-u
break; hZLwg7X!
SortUtil.swap(queue,j,k); :<>=,`vQD
k = j; .wz.Jr`{
} Ce_ES.
} @j?)uJ0Q
^jZ4tH3K
} 8K0@*0
P+[\9Gg
} K na
V<G=pPC'H
SortUtil： B]|"ePj-
}o MY
package org.rut.util.algorithm; ![4<6/2gy
T_*R^Ukb5
import org.rut.util.algorithm.support.BubbleSort; b)Dzau
import org.rut.util.algorithm.support.HeapSort; nRlvW{p;
import org.rut.util.algorithm.support.ImprovedMergeSort; !L_\6;aP,x
import org.rut.util.algorithm.support.ImprovedQuickSort; l|p \8=
import org.rut.util.algorithm.support.InsertSort; Kn+m9
import org.rut.util.algorithm.support.MergeSort; >@9>bI+Q
import org.rut.util.algorithm.support.QuickSort; cq \()uF'c
import org.rut.util.algorithm.support.SelectionSort; XhEd9>#
import org.rut.util.algorithm.support.ShellSort; 0413K_
}qOj^pkJ
/** n; fUwon
* @author treeroot s j{i
* @since 2006-2-2 WN%KATA
* @version 1.0 1JXa/f+
*/ Z:(yX0U,[
public class SortUtil { <"Cacfg
public final static int INSERT = 1; (( D*kd"
public final static int BUBBLE = 2; ">^O{X\
public final static int SELECTION = 3; ApxGrCu
public final static int SHELL = 4; amY\1quD|
public final static int QUICK = 5; UBy< vwnU
public final static int IMPROVED_QUICK = 6; T2^0Q9E?
public final static int MERGE = 7; #- hYjE5
public final static int IMPROVED_MERGE = 8; 6(uK5eD(!n
public final static int HEAP = 9; U*sQYt<?g
1JI\e6]I
public static void sort(int[] data) { !$i*u-%4
sort(data, IMPROVED_QUICK); DlWnz-
} w[S!U<9/
private static String[] name={ 05cyWg9a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" toCxY+"nbU
}; xF4>D!T%8
ub0uxvz
private static Sort[] impl=new Sort[]{ ]_WB^
new InsertSort(), ;Xw'WMb*=
new BubbleSort(), <-1(G1v
new SelectionSort(), ,c;u]
new ShellSort(), RS>;$O_(M
new QuickSort(), )d\u_m W^
new ImprovedQuickSort(), z!r-g(^G
new MergeSort(), Gw5j6
new ImprovedMergeSort(), D~i m1h;>
new HeapSort() "#a_--"k9
}; :bhpYEUMx
` 5.PPI\h2
public static String toString(int algorithm){ d }"Dp
return name[algorithm-1]; nK"XyZ&
} ?x|8"*N
!e}LB%zf
public static void sort(int[] data, int algorithm) { H~IN<3ko
impl[algorithm-1].sort(data); g0P^O@8
} $~[k?D
_djr>C=H"
public static interface Sort { d3$&I==;:
public void sort(int[] data); gdu8O!9)
} j}2,|9ne
]+SVQ|v0
public static void swap(int[] data, int i, int j) { ){PL6|5x
int temp = data; \UdHN=A&
data = data[j]; 8e`'Ox_5a
data[j] = temp; b0A*zQA_)
} I?l%RdGW
} L|7F%oR