[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; ut560,h~
} C{uT1`
int i1=l; >L4F'#I
int i2=mid+1; 8&"Jlz |
for(int cur=l;cur<=r;cur++){ l$9k:#\FD
if(i1==mid+1) !0Nf`iCQ(
data[cur]=temp[i2++]; i)X~L4gn
else if(i2>r) +<F3}]]
data[cur]=temp[i1++]; PLs`Ci|`
else if(temp[i1] data[cur]=temp[i1++]; tR'RB@kJ
else M`'DD-Q
data[cur]=temp[i2++]; 8Z9>h:c1
} ez[x8M>
} {._'Q[
_%D7D~2r|
} e8xq`:4Y
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改进后的归并排序: ?VE'!DW
l_:P|
package org.rut.util.algorithm.support; Nr>UZlU8
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import org.rut.util.algorithm.SortUtil; c]#}#RJ`\
*.>@
/** <zn)f@W
* @author treeroot Tt~[hC h
* @since 2006-2-2 QA0uT{x90
* @version 1.0 +39uKOrZ
*/ zM&ro,W
public class ImprovedMergeSort implements SortUtil.Sort { :AztHf?X
~<VxtcEBz
private static final int THRESHOLD = 10; HSG Ln906
H6 x
/* T&pCLvkz
* (non-Javadoc) oydP}X
* =&UE67eK,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JnK<:]LcK
*/ ^"?a)KC
public void sort(int[] data) { {q8|/{;
int[] temp=new int[data.length]; :+jg311}
mergeSort(data,temp,0,data.length-1); `&q+ f+z
} {u1|`=;
k $^/$N
private void mergeSort(int[] data, int[] temp, int l, int r) { ~"`e9Im
int i, j, k; hjg1By(
int mid = (l + r) / 2; .p e3L7g
if (l == r) Q34u>VkdQI
return; gF)-Ci
if ((mid - l) >= THRESHOLD) `f~bnL
mergeSort(data, temp, l, mid); j`.&4.7+
else # f-hI
insertSort(data, l, mid - l + 1); G2I%^.s
if ((r - mid) > THRESHOLD) 3R%JmLM+R9
mergeSort(data, temp, mid + 1, r); &57~i=A 3
else uVU)LOx
insertSort(data, mid + 1, r - mid); 7MrHu2rZ=
ma*#*4
for (i = l; i <= mid; i++) { A~vx,|I
temp = data; @PNgqjd
} t`Z3*?UqI
for (j = 1; j <= r - mid; j++) { xJ/)*?@+
temp[r - j + 1] = data[j + mid]; TM#L.xPMf
} 2H9hN4N
int a = temp[l]; d<j`=QH
int b = temp[r]; Wgte.K> /
for (i = l, j = r, k = l; k <= r; k++) { ?o+%ckH
if (a < b) { PsNrCe%e
data[k] = temp[i++]; COHBjufmR
a = temp; Y3[KS;_fr9
} else { i3|xdYe$
data[k] = temp[j--]; 8/)\nV$0Y
b = temp[j]; `H:`JBe=+[
} u,8)M'UU
} klQmo30i
} +:jonN9d
>uYQt~s
/** 8493Sw
* @param data KM[0aXOtv
* @param l M}11 tUl
* @param i |A*4Fuc&
*/ 7=?!B#hm!
private void insertSort(int[] data, int start, int len) { G5U?]& I8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BXdk0
} `W)?d I?#M
} ^rq\kf*]
} xOShO"4Z
} xP_%d,
*Xk5H,:
堆排序： |33t5}we
a~LA&>@
package org.rut.util.algorithm.support; /"La@M37
W3UxFs]$
import org.rut.util.algorithm.SortUtil; <]G'& iv>
L)U*dY
/** |^5"-3Q
* @author treeroot F5x*#/af
* @since 2006-2-2 (kY0<
* @version 1.0 S"G(_%
*/ uQ_C<ii"W
public class HeapSort implements SortUtil.Sort{ xf;>o$oN0P
UJqh~s
/* (non-Javadoc) IowXVdm@6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yKj}l,i~8
*/ +zche
public void sort(int[] data) { %eofG]VM<
MaxHeap h=new MaxHeap(); /Lr`Aka5
h.init(data); *)w+xWmM3w
for(int i=0;i h.remove(); %Jh(5
System.arraycopy(h.queue,1,data,0,data.length); *Lz'<=DLoW
} 8f~x\.
w`8H=Hf
private static class MaxHeap{ -V4{tIQY
qVfn(rZ
void init(int[] data){ HM)D/CO,?
this.queue=new int[data.length+1]; |z3!3?%R
for(int i=0;i queue[++size]=data; ,|yscp8
fixUp(size); ;Z0&sFm
} g9^\QYh!
} y{3+Un
R3og]=uFzm
private int size=0; 0^V<,CAV
7NT} Zwf
private int[] queue; s|XWw<Sa
(Ox&B+\v+v
public int get() { @:CM<+
return queue[1]; cA4?[F
} ~x9J&*zxM
1o\2\B=k{
public void remove() { Heh&;c
SortUtil.swap(queue,1,size--); Jy}~ZY
fixDown(1); h9m|f|cH
} c"kB@P
file://fixdown %>+lr%B
private void fixDown(int k) { c.LRS$o/j
int j; /dg?6XT/
while ((j = k << 1) <= size) { `.JW_F)1
if (j < size %26amp;%26amp; queue[j] j++; }a!|n4|`
if (queue[k]>queue[j]) file://不用交换 `T+>E0H(f
break; ;rT/gwg!
SortUtil.swap(queue,j,k); ]8}2
k = j; ws`r\k]3J
} x7E] }h
} AKjobA#
private void fixUp(int k) { /f?;,CyI
while (k > 1) { #FAW@6QG
int j = k >> 1; 6P>Y2xV:
if (queue[j]>queue[k]) (Q||5
break; ejR$N!LL
SortUtil.swap(queue,j,k); T2]8w1l&K
k = j; 0$`pYW]
} ] +%`WCr9
} z6M5'$\y
^,=}'H]
} ~28{BY
[>GblL
} ]aMDx>OE
Jgr;'U$
SortUtil： feB ?
3C!|!N1Hn
package org.rut.util.algorithm; mIG>`7`7N
um$U3'0e
import org.rut.util.algorithm.support.BubbleSort; <Tgubv+J
import org.rut.util.algorithm.support.HeapSort; 1&e8vVN
import org.rut.util.algorithm.support.ImprovedMergeSort; H74'I}
import org.rut.util.algorithm.support.ImprovedQuickSort; <?KgzIq2
import org.rut.util.algorithm.support.InsertSort; ~DxuLk6 s
import org.rut.util.algorithm.support.MergeSort; sx+k V A
import org.rut.util.algorithm.support.QuickSort; '=+N )O
import org.rut.util.algorithm.support.SelectionSort; :,p3&2I
import org.rut.util.algorithm.support.ShellSort; 3v3cK1K@oE
7^rT-f07
/** @eBo7#Zr
* @author treeroot \M.?*p
* @since 2006-2-2 4Yok,<
* @version 1.0 bt1bTo
*/ L=Aj+
public class SortUtil { r*mYtS
public final static int INSERT = 1; 2Q(ZW@0
public final static int BUBBLE = 2; :n~Mg{j3
public final static int SELECTION = 3; vxPr)"Vvz
public final static int SHELL = 4; tq}sedYhee
public final static int QUICK = 5; 6v:L8t$"
public final static int IMPROVED_QUICK = 6; *wqR.n?
public final static int MERGE = 7; _G-6G=q
public final static int IMPROVED_MERGE = 8; VWdTnu
public final static int HEAP = 9; Tg@G-6u0c
.Gr"|uII
public static void sort(int[] data) { 3nhQ^zqf
sort(data, IMPROVED_QUICK); . &}x[~g
} Vo{ ~D:)
private static String[] name={ jl7>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /-lW$.+{?
}; zBTxM
3VMaD@nYa
private static Sort[] impl=new Sort[]{ _]'kw [
new InsertSort(), U<XfO'XJ
new BubbleSort(), B(71I;
new SelectionSort(), |uFb(kL[U
new ShellSort(), l#ct;KZ
new QuickSort(), g1F9IB42@<
new ImprovedQuickSort(), dQH8s
new MergeSort(), {7IZN< e
new ImprovedMergeSort(), {be|G^.c
new HeapSort() A`vRUl,c=
}; :SN?t
OBlQ
public static String toString(int algorithm){ $M-"az]
return name[algorithm-1]; .u7grC C
} \[]BB5)8
jsV1~1:83
public static void sort(int[] data, int algorithm) { K-*ZS8
impl[algorithm-1].sort(data); #+"D?
} "\9beK:l
B"4A1!
public static interface Sort { UZiL NKc
public void sort(int[] data); <uoVGV5N
} 0.!vp?
874j9ky[
public static void swap(int[] data, int i, int j) { +('xzW
int temp = data; Xsb.xxK.
data = data[j]; (Y&gse1}!
data[j] = temp; ;gJAxVD<
} <|WXFjn
} 33}p02#