[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; fa,:d8
} 5+!yXkE^e
int i1=l; h.]^o*DJ
int i2=mid+1; SmD#hE[
for(int cur=l;cur<=r;cur++){ \)wVO*9*0
if(i1==mid+1) v;5-1
data[cur]=temp[i2++]; Q]GS#n
else if(i2>r) ks("( nU
data[cur]=temp[i1++]; @BjB Mi,
else if(temp[i1] data[cur]=temp[i1++]; 9eq)WI/
else W( sit;O
data[cur]=temp[i2++]; -T1R}ew*t
} l3BN,HNv+
} l3u+fE,;_
568M4xzi
} xzA!,75@U
#o[n.
改进后的归并排序: h$$JXf
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package org.rut.util.algorithm.support; r}e(MT:R'
'YGP42#
import org.rut.util.algorithm.SortUtil; K3h];F!^
lH`c&LL-=!
/** "Dk@-Ac
* @author treeroot *0@Z+'M?
* @since 2006-2-2 jg'"?KSU~
* @version 1.0 f. >[ J
*/ T"3LO[j+
public class ImprovedMergeSort implements SortUtil.Sort { Yc-5Mr8*,
E&z^E2
private static final int THRESHOLD = 10; YfZ5Q}*1O+
ib 'l:GM
/* e 2NF.
* (non-Javadoc) /6[vF)&
* ]AM*9!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ws,?ImA
*/ tj00xYY
public void sort(int[] data) { H|aC(c
int[] temp=new int[data.length]; ;Ccp1a~+
mergeSort(data,temp,0,data.length-1); G7,v:dlK
} 7b-[# g
@oj_E0i3
private void mergeSort(int[] data, int[] temp, int l, int r) { F?MVQ!K*
int i, j, k; *P7n YjG
int mid = (l + r) / 2; <3tf(?*,k]
if (l == r) P8=J0&5
return; y]obO|AH
if ((mid - l) >= THRESHOLD) ?P9VdS1-
mergeSort(data, temp, l, mid); `FNU- I4s
else )v+&l9D
insertSort(data, l, mid - l + 1); oNl-!W
if ((r - mid) > THRESHOLD) N;P/$
mergeSort(data, temp, mid + 1, r); y c<%f
else k5bv57@
insertSort(data, mid + 1, r - mid); h82y9($cZ
&WAU[{4W
for (i = l; i <= mid; i++) { +/n]9l]#h
temp = data; $^ir3f+
} !=;Evf
for (j = 1; j <= r - mid; j++) { ?wmu0rR
temp[r - j + 1] = data[j + mid]; qkc,93B3
} I Gb'ii=A
int a = temp[l]; %jq R^F:J
int b = temp[r]; [a$1{[|)
for (i = l, j = r, k = l; k <= r; k++) { xOg|<Nnl
if (a < b) { @W(,|xES
data[k] = temp[i++]; jL5O{R[ x:
a = temp; ^tm2Duv
} else { ;UX9Em
data[k] = temp[j--]; /i Xl]<
b = temp[j]; F$JA IL{W
} %Gu=Dkz
} RiZ}cd
} Qd% (]L[N.
cw~GH
/** RN1KM
* @param data hhylsm
* @param l Ebi~gGo
* @param i 9S'\&mRl
*/ AlrUfSBB
private void insertSort(int[] data, int start, int len) { T}XJFV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6OPNP0@r
} yfFe%8w_vw
} .1J`>T?=Q
} +U<Ae^V
} S*3$1BTl
>B;S;_5=
堆排序： q4"^G:
aG@GJ@w
package org.rut.util.algorithm.support; >/@Q7V99{
^H<VH
import org.rut.util.algorithm.SortUtil; A"+t[0$.
436SIh
/** #vBSg
* @author treeroot R5uz<
* @since 2006-2-2 >i61+uzEd+
* @version 1.0 55>+%@$,a
*/ ;yZY2)L
public class HeapSort implements SortUtil.Sort{ Pff-eT+~m
.&^M Z8
/* (non-Javadoc) FuBUg _h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +`m0i1uI3
*/ u |$GOSD
public void sort(int[] data) { !a'{gw
MaxHeap h=new MaxHeap(); \4*i;a.kU
h.init(data); K~5(j{Kb8
for(int i=0;i h.remove(); ,0>_(5
System.arraycopy(h.queue,1,data,0,data.length); X)[QEq^
} ;%u)~3B$JK
dwzk+@]8
private static class MaxHeap{ V+*1?5w
kwt;pxp i
void init(int[] data){ &j{IG`Trl
this.queue=new int[data.length+1]; F20%r 0
for(int i=0;i queue[++size]=data; f%YD+Dt_V
fixUp(size); <lPHeO<^]
} Z>@\!$Mc
} 6XVJ/qZ
u`*$EP-%
private int size=0; c/3]M>+M
@(tuE
private int[] queue; <("P5@cExU
9 &Od7Cn
public int get() { _8z
return queue[1]; ,(#n8|q4
} )7rMevF(xJ
*K=me/ 3
public void remove() { R*O6Z"h
SortUtil.swap(queue,1,size--); T5 BoOVgO
fixDown(1); VK4"
} W?12'EG}xa
file://fixdown ,76nDXy`
private void fixDown(int k) { 90$`AMR
int j; MP8s}
while ((j = k << 1) <= size) { D2#.qoP #
if (j < size %26amp;%26amp; queue[j] j++; )#cGePA
if (queue[k]>queue[j]) file://不用交换 :OY7y`hRG
break; n8e}8.Bu
SortUtil.swap(queue,j,k); YH!` uU(Lh
k = j; FkoN+\d
} 04z2gAo
} 9n".Q-V;k
private void fixUp(int k) { 2) A$bx
while (k > 1) { =G<S!qW
int j = k >> 1; :w c.V
if (queue[j]>queue[k]) \3z^/F~
break; \RTXfe-`
SortUtil.swap(queue,j,k); AyZBH&}RZ
k = j; 7Rom#Kl:
} (KG>lTdN
} *W<g%j-a
3gmu-tv
} o"A%dC_
QGd"Z lQ
} KY;E.D`
j6)@kW9x
SortUtil： X?.LA7)CK
!7[Rhk7bW
package org.rut.util.algorithm; [5kaF"
rB%acTCz=[
import org.rut.util.algorithm.support.BubbleSort; .:s**UiDR
import org.rut.util.algorithm.support.HeapSort; s"]LQM1|
import org.rut.util.algorithm.support.ImprovedMergeSort; $X;fz)u
import org.rut.util.algorithm.support.ImprovedQuickSort; c=HL 6v<
import org.rut.util.algorithm.support.InsertSort; $PNIuC?=
import org.rut.util.algorithm.support.MergeSort; Z$5@r2d)
import org.rut.util.algorithm.support.QuickSort; <)(STo
import org.rut.util.algorithm.support.SelectionSort; /ZKO\q
import org.rut.util.algorithm.support.ShellSort; tpi63<N
j^Z3
/** s?*MZC
* @author treeroot fKAG+t
* @since 2006-2-2 sL tsvH#
* @version 1.0 fXYg %
*/ dKyX70Zy9
public class SortUtil { -3c?Yaf"
public final static int INSERT = 1; m:~s6c6H
public final static int BUBBLE = 2; =jmn
public final static int SELECTION = 3; `W[oLQ
public final static int SHELL = 4; ]7^YPFc+
public final static int QUICK = 5; ef!V EtEOv
public final static int IMPROVED_QUICK = 6; -K)P|'-?m
public final static int MERGE = 7; c;bp[Y3R
public final static int IMPROVED_MERGE = 8; ~z!U/QR2
public final static int HEAP = 9; NLC}XL
E$rn^keM
public static void sort(int[] data) { >g6:{-b^a
sort(data, IMPROVED_QUICK); iffRGnN^e
} /5_!Y>W
private static String[] name={ RxkcQL/Le
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c>r0N[
}; vV|u+v{
Y0U<l1(|
private static Sort[] impl=new Sort[]{ ^YKEc0"w(
new InsertSort(), }45&s9m=
new BubbleSort(), ([ xYOxcp5
new SelectionSort(), W%.Kr-[?`o
new ShellSort(), #x&1kHu<
new QuickSort(), F 3}cVO2bY
new ImprovedQuickSort(), P{)eZINlE
new MergeSort(), !T|X/BR
new ImprovedMergeSort(), %c(':vI#
new HeapSort() $3%EKi
}; I/MYS5}
Zl.}J,0F
public static String toString(int algorithm){ /'}O-h
return name[algorithm-1]; )fR'1_
} o%!a
c0jC84*v
public static void sort(int[] data, int algorithm) { =8fp4#]7
impl[algorithm-1].sort(data); dM7-,9Vc
} Vo"\nj
\ey3i((L
public static interface Sort { bY;ah;<
public void sort(int[] data); oO>mGl36H
} `hL16S
5>JrTO5
public static void swap(int[] data, int i, int j) { aBT|Q@Y.
int temp = data; \=4[v-3H
data = data[j]; p}}o#a~V),
data[j] = temp; icHc!m?
} 4RNB\D
} Hc4]2pf