[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; lq"X_M$
} 1P[x.t#
int i1=l; 8U(o@1PT
int i2=mid+1; >V?0#f45@
for(int cur=l;cur<=r;cur++){ h'};spv
if(i1==mid+1) (E)hEQ@8
data[cur]=temp[i2++]; `7w-_o %
else if(i2>r) aVHIU3
data[cur]=temp[i1++]; ^~-YS-.J#,
else if(temp[i1] data[cur]=temp[i1++]; _~;%zFX
else KcpYHWCa.
data[cur]=temp[i2++]; \u{4=-C.
} u>.a;BO
} "Kp#Lx
@L~erg>8=
} bY.VNA
RG'76?z
改进后的归并排序: 5N$XY@
aIFlNS,y
package org.rut.util.algorithm.support; iLZY6?_^
pXl[I;
import org.rut.util.algorithm.SortUtil; |@'O3KA
/P@%{y
/** L?ht^ H
* @author treeroot ~`QoBZ.O&
* @since 2006-2-2 kMurNA=
* @version 1.0 O7 aLW
*/ V=*^C+6s
public class ImprovedMergeSort implements SortUtil.Sort { 5Y^"&h[/
:K]7(y7>
private static final int THRESHOLD = 10; h#O9TB
|xcI~ X7Q
/* El5} f4sl
* (non-Javadoc) p__wBUB
* ceE]^X;p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c?HUW
*/ M)+pH
public void sort(int[] data) { ^_|kEvk0
int[] temp=new int[data.length]; Jg[Ao#,==
mergeSort(data,temp,0,data.length-1); =/46;844T
} >":xnX#
EZ .3Z`
private void mergeSort(int[] data, int[] temp, int l, int r) { Ch>F11kC
int i, j, k; wxo
int mid = (l + r) / 2; 2=NaqHt(
if (l == r) T2<%[AF0
return; :gU5CUm
if ((mid - l) >= THRESHOLD) ap}p?r
mergeSort(data, temp, l, mid); nS%jnp#
else 2L1,;
insertSort(data, l, mid - l + 1); c#}K,joeU
if ((r - mid) > THRESHOLD) Ql)hIf$Oo
mergeSort(data, temp, mid + 1, r); i m;6$3
else B??07j
insertSort(data, mid + 1, r - mid); j8&NscK)
$N)G:=M!s
for (i = l; i <= mid; i++) { zVw5(Tc
temp = data; \OVtvJV]
} *C5`LgeX
for (j = 1; j <= r - mid; j++) { IB[$~sGe
temp[r - j + 1] = data[j + mid]; Pn">fWRCx
} 0dC5 -/+
int a = temp[l]; )Q =>7%ZA
int b = temp[r]; >[|N%9\
for (i = l, j = r, k = l; k <= r; k++) { '1ySBl1>
if (a < b) { :LNE?@
data[k] = temp[i++]; h:362&?]
a = temp; xz"60xxY
} else { `2s@O>RV
data[k] = temp[j--]; YkWHI(p
b = temp[j]; h7"U1'b
} $q@d.Z>;
} 7amVnR1f
} "g"a-{8
,sAAV%">
/** @Uez2?
* @param data TsaQR2J@
* @param l 3MQZ)!6
* @param i )Wk_|zO-
*/ 1W{N6+u
private void insertSort(int[] data, int start, int len) { El<*)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =9a2+v0
} A%.mIc.
} !g]5y=
} TR0y4u[
} 8J(j}</>a
>5~#BrpwG
堆排序： nL:&G'd
`]eJF|"
package org.rut.util.algorithm.support; wI_@
QE(.w dHP
import org.rut.util.algorithm.SortUtil; mgjJNzclL
b]4dmc*N+
/** ux&"TkEp
* @author treeroot W%g*sc*+
* @since 2006-2-2 I1E9E$m5\<
* @version 1.0 K4!-%d$
*/ ;9T}h2^`B
public class HeapSort implements SortUtil.Sort{ %f1%9YH
h$l/wn
/* (non-Javadoc) D9oNYF-V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tbRW6
*/ V|MGG
public void sort(int[] data) { ={:a N)
MaxHeap h=new MaxHeap(); .Ix3wR9
h.init(data); !,[#,oy;
for(int i=0;i h.remove(); (G"'Fb6d
System.arraycopy(h.queue,1,data,0,data.length); V^2_]VFj
} dM-cQo:
Q*smH-Sw
private static class MaxHeap{ .zO2g8(VR
c1'@_Is
void init(int[] data){ X,|8Wpi=
this.queue=new int[data.length+1]; FXof9fa_B
for(int i=0;i queue[++size]=data; YJ _eE
fixUp(size); C$y6^/7)
} !2LX+*;
} K&|h%4O
15g!Q *v
private int size=0; ,&t+D-s<f
!!1?2ine
private int[] queue; dE7x SI
"<ZV'z
public int get() { YP2VSK2Q
return queue[1]; C Bkoky9&
} C& +MRP
nj[TTndJt
public void remove() { `>:5[Y
SortUtil.swap(queue,1,size--); h:%,>I%{
fixDown(1); d/7fJ8y8
} MgJ6{xzz
file://fixdown 7=l~fKu
private void fixDown(int k) { \]tBwa
int j; @k?vbq
while ((j = k << 1) <= size) { QHk\Z
if (j < size %26amp;%26amp; queue[j] j++; Dl;hOHvKk
if (queue[k]>queue[j]) file://不用交换 ?,vLRq.
break; JmI%7bH@
SortUtil.swap(queue,j,k); 7Q .Su
k = j; \zO.#H
} *d1BpR%
} kt6x"'"1
private void fixUp(int k) { rQjk
while (k > 1) { ]at$ohS
int j = k >> 1; .G8`Ut Z
if (queue[j]>queue[k]) .<hHK|HF
break; O*xx63%jR
SortUtil.swap(queue,j,k); 7>Z|K
k = j; ')uYI;h9
} oPSPb(.
} H%wB8Y ]
Mg2+H+C~:
} ]&*POri&
9p{4-]
} =z.j{%
G]K1X"W?
SortUtil： gQ+]N*.
1V%tev9a
package org.rut.util.algorithm; jRK}H*uem
Y <6|z3
import org.rut.util.algorithm.support.BubbleSort; R|st<P
import org.rut.util.algorithm.support.HeapSort; 0@ `]m
import org.rut.util.algorithm.support.ImprovedMergeSort; xVxs~p1
import org.rut.util.algorithm.support.ImprovedQuickSort; -c`xeuzK'
import org.rut.util.algorithm.support.InsertSort; w 3t,S3!
import org.rut.util.algorithm.support.MergeSort; mrTf["K
import org.rut.util.algorithm.support.QuickSort; Ni_H1G
import org.rut.util.algorithm.support.SelectionSort; @ st>#]i4
import org.rut.util.algorithm.support.ShellSort; [?]N GTr#
7H7 Xbi@
/** 6$`<Y?
* @author treeroot [EAOk=X
* @since 2006-2-2 0,Ds1y^
* @version 1.0 bfxE}>
*/ 5nG\J g7
public class SortUtil { "Lp.*o
public final static int INSERT = 1; W5R/Ub@g
public final static int BUBBLE = 2; m}]{Y'i]R
public final static int SELECTION = 3; |Xso}Y{
public final static int SHELL = 4; NQdwj>_a
public final static int QUICK = 5; x93@[B*%
public final static int IMPROVED_QUICK = 6; !nmZ"n|}p
public final static int MERGE = 7; X|of87
public final static int IMPROVED_MERGE = 8; >^Nnhnr
public final static int HEAP = 9; Rh'z;Gyr
>q}3#TvP@
public static void sort(int[] data) { 0Wr<l%M)+
sort(data, IMPROVED_QUICK); 14,)JZN
} UTA|Ps$
private static String[] name={ k[Em~>m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `H'G"V
}; TFSdb\g
529;_|
private static Sort[] impl=new Sort[]{ K; #FU
new InsertSort(), m<gdyY
new BubbleSort(), }+,Q&]>~
new SelectionSort(), SoIK<*J
new ShellSort(), $fb%?n{
new QuickSort(), jFSR+mP!
new ImprovedQuickSort(), ]cRvdUGv
new MergeSort(), NLsF6BX/-
new ImprovedMergeSort(), mF6-f#t>H+
new HeapSort() x;mw?B[
}; 9{pT)(Wnb
8lF9LZ8
public static String toString(int algorithm){ [L%Ltmx
return name[algorithm-1]; xQ9t1b|{e
} q!z?Tn#!jd
WIWo4[(
public static void sort(int[] data, int algorithm) { b_+o1Zy`
impl[algorithm-1].sort(data); 0|GYtnd
} _/>ktYo:
"aGmv9\
public static interface Sort { H1N@E}>|
public void sort(int[] data); (kL"*y/"p
} 4 ]oe`yx
x?i wtZ@
public static void swap(int[] data, int i, int j) { jFQy[k-B
int temp = data; !'$*Z(
data = data[j]; frcAXh9
data[j] = temp; bJ2-lU% ;2
} ]OpGD5jZ
} KloX.y)q