[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; I,OEor6%R(
} ~4S@kYe{3K
int i1=l; Nih8(pbe
int i2=mid+1; Z&e_yl
for(int cur=l;cur<=r;cur++){ rH"&
if(i1==mid+1) |_@ '_
data[cur]=temp[i2++]; ;N6Euiz
else if(i2>r) {x{e?c!
data[cur]=temp[i1++]; AP&mr1_
else if(temp[i1] data[cur]=temp[i1++]; h W\q
else T$RVz
data[cur]=temp[i2++]; 4,"%
} 3e+ Ih2
} 0Ah'G
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} Ea#wtow|-
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改进后的归并排序: Z+!._uA
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package org.rut.util.algorithm.support; V+j58Wuf
[}Vne;V
import org.rut.util.algorithm.SortUtil; FGY4u4y
LxaR1E(Cc'
/** &~Qi+b0!
* @author treeroot OPHf9T3H
* @since 2006-2-2 q^NI
* @version 1.0 wPdp!h7B~N
*/ Khp`KPxz%
public class ImprovedMergeSort implements SortUtil.Sort { h8OmO5/H
%s<7M@]f
private static final int THRESHOLD = 10; L6S!?t.{Yv
\@8j&],dl
/* I*8i=O@0T
* (non-Javadoc) WfYu-TK*
* ?Ho~6q8O@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fR[kjwX)<1
*/ qXC>DGy
public void sort(int[] data) { hZ6CiEJB
int[] temp=new int[data.length]; F} d>pK9fn
mergeSort(data,temp,0,data.length-1); !@j5yYf
} zQvp<IUq
Hq=5/N
private void mergeSort(int[] data, int[] temp, int l, int r) { y!JZWq%=
int i, j, k; 9,8}4Y=GVI
int mid = (l + r) / 2; rBR,lS$4
if (l == r) rik-C7
return; X633.]+
if ((mid - l) >= THRESHOLD) t*X k'(v
mergeSort(data, temp, l, mid); (prqo1e@
else t0t" =(d
insertSort(data, l, mid - l + 1); <Sw>5M!j
if ((r - mid) > THRESHOLD) HAa$pGb
mergeSort(data, temp, mid + 1, r); <*I%U]
else 5k/Y7+*?E
insertSort(data, mid + 1, r - mid); l!UF`C0g
, H$1iJ?
for (i = l; i <= mid; i++) { 8&T6
temp = data; Z1u:OI@(
} yn&+ >{
for (j = 1; j <= r - mid; j++) { 6%N.'wf
temp[r - j + 1] = data[j + mid]; zl~`>
} lI#Ap2@
int a = temp[l]; g?Jx99c;
int b = temp[r]; yc ize2>q
for (i = l, j = r, k = l; k <= r; k++) { G .PzpBA
if (a < b) { /q.iUwSK>
data[k] = temp[i++]; GZt+(q
a = temp; eAvOT$
} else { ey4RKk,
data[k] = temp[j--]; qo,uOi
b = temp[j]; i n}N[
} ^Yu<fFn
} #9=as Y
} ++b1VBP
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/** !{hC99q6
* @param data 2|2'?
* @param l /F/zMZGSA{
* @param i ?;{d
*/ fcDiYJC*
private void insertSort(int[] data, int start, int len) { QPL6cU$&R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Rn] `_[)*~
} i6)7)^nG
} Q[5j5vry
} jS_fwuM
} {& Pk$Q!
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堆排序： ZjCT * qx
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package org.rut.util.algorithm.support; 7bC1!x*qw
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import org.rut.util.algorithm.SortUtil; *RPdU.
P;B<R"
/** d#Hl3]wT
* @author treeroot UJhmhI
* @since 2006-2-2 rUg<(/c
* @version 1.0 $>Y2N5
*/ k)'y;{IN
public class HeapSort implements SortUtil.Sort{ HLD8W8
n+ot. -
/* (non-Javadoc) pb>TUKvT&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =IbDGw(
*/ U/9i'D[|{
public void sort(int[] data) { ~Bw)rf,
MaxHeap h=new MaxHeap(); "'#18&N
h.init(data); wNNInS6
for(int i=0;i h.remove(); WAd5,RZ?
System.arraycopy(h.queue,1,data,0,data.length); T4 :UJj}
} tBJCfM
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private static class MaxHeap{ PTt#Ixn,
[;/4'
void init(int[] data){ >M2~BDZ
this.queue=new int[data.length+1]; o8PK,!Pl
for(int i=0;i queue[++size]=data; 8ClOd<I
fixUp(size); j@7%%
} MKl`9 Y3Ge
} t[dOWgHi
#o>~@.S#:0
private int size=0; [UP-BX(
n5Coxvy1
private int[] queue; pZVT:qFF
/b|V=j}W
public int get() { <./r%3$;7
return queue[1]; ]U4)2s
} 9A7LDHst7
Lo<-;;vQ
public void remove() { X-lB1uq^
SortUtil.swap(queue,1,size--); @Rc/^B:
fixDown(1); &1!T@^56
} Ht{Q=w/9
file://fixdown x/<eY<Vgm?
private void fixDown(int k) { hggP9I:s,
int j; Lm!/iseGv
while ((j = k << 1) <= size) { d ynq)lf
if (j < size %26amp;%26amp; queue[j] j++; e$vvmbK.
if (queue[k]>queue[j]) file://不用交换 88]4GVi
break; vzXfJP
SortUtil.swap(queue,j,k); B_kjy=]O.
k = j; UPE9e
} =x &"aF1
} Y&![2o.Q
private void fixUp(int k) { \me'B {aa
while (k > 1) { B(eC|:w[z
int j = k >> 1; y E;n.L
if (queue[j]>queue[k]) [iO*t,3@h
break; l KdY!j"
SortUtil.swap(queue,j,k); d~|/LR5
k = j; X2[d15!9
} r;7&U<j~Z
} )j_Y9`R
;ndwVZ~,
} G/)]aGr
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} +";<Kd-
?=FRnpU?
SortUtil： EqYBT
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package org.rut.util.algorithm; qQ{i2D%)?f
*7JsmN?
import org.rut.util.algorithm.support.BubbleSort; ^*$lCUv8p
import org.rut.util.algorithm.support.HeapSort; &{R]v/{p]
import org.rut.util.algorithm.support.ImprovedMergeSort; W,D$=Bg
import org.rut.util.algorithm.support.ImprovedQuickSort; c %f'rj
import org.rut.util.algorithm.support.InsertSort; N E/_
import org.rut.util.algorithm.support.MergeSort; R'z -#*[
import org.rut.util.algorithm.support.QuickSort; *a[iq`499
import org.rut.util.algorithm.support.SelectionSort; bCSgdK
import org.rut.util.algorithm.support.ShellSort; 6?(Z f
4iPxtVT
/** b\.l!vn0
* @author treeroot +\ZaVi
* @since 2006-2-2 qt.Y6s:r_
* @version 1.0 hgU#2`fS
*/ |bM?Q$>~
public class SortUtil { &2Q0ii#Aa
public final static int INSERT = 1; kw$*o k
public final static int BUBBLE = 2; Ij_h #f
public final static int SELECTION = 3; r.vezsH
public final static int SHELL = 4; F8*zG 4/&
public final static int QUICK = 5; kKHGcm^r
public final static int IMPROVED_QUICK = 6; <cUaIb;(4
public final static int MERGE = 7; qJZ:\u8oO
public final static int IMPROVED_MERGE = 8; D&]dlY@*
public final static int HEAP = 9; Mv1V Vk
8j^3_lD
public static void sort(int[] data) { ;XDGlv%
sort(data, IMPROVED_QUICK); na0-v-
} +]*hzWbe
private static String[] name={ nB.u5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6?uo6 I
}; ?>}&,:U}
bmd3fJb`r
private static Sort[] impl=new Sort[]{ a'prlXr\4
new InsertSort(), J12hjzk6@
new BubbleSort(), "l7))>lL
new SelectionSort(), QP={b+8
new ShellSort(), [+_0y[~,tB
new QuickSort(), Dxx`<=&g
new ImprovedQuickSort(), &"/IV$H
new MergeSort(), sR*.i?lN
new ImprovedMergeSort(), R;3Tyn+
new HeapSort() ,f3Ck*M
}; d~za%2{
qs 0'}>
public static String toString(int algorithm){ enw7?|(
return name[algorithm-1]; iL\eMa
} Z^l!#"\4m
j{:>"6
public static void sort(int[] data, int algorithm) { I7@g,~s
impl[algorithm-1].sort(data); Y?b4* me
} <7X6ULQ
l99{eD
public static interface Sort { LE>b_gQ$ 2
public void sort(int[] data); ?T\_"G
} |j>fsk~
c.JMeh
public static void swap(int[] data, int i, int j) { U%zZw)
int temp = data; $ri'tJ+
data = data[j]; ~L3]Wa.
data[j] = temp; 7O^'?L<C'
} o9 g0fC
} ^a?H"