[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; Ta8;
} 1zqIB")s>
int i1=l; +m8CN(c
int i2=mid+1; E!nEB(FD
for(int cur=l;cur<=r;cur++){ 7}>Zq`]~
if(i1==mid+1) j}t"M|`
data[cur]=temp[i2++]; _IYd^c
else if(i2>r) T#KF@8'-
data[cur]=temp[i1++]; `S$zwot
else if(temp[i1] data[cur]=temp[i1++]; (&t741DN|
else T5H[~b|9-
data[cur]=temp[i2++]; X67^@~l
} Aj#bhv
} tUU`R{=(
cLhHGwX=x
} u5zL;C3O
%Z_/MNI
改进后的归并排序: UVa:~c$U4
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package org.rut.util.algorithm.support; utOATjB.z
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import org.rut.util.algorithm.SortUtil; `s1>7XWf
r{2V`h1/|
/** cBcfGNTJ~
* @author treeroot 5^lFksZ
* @since 2006-2-2 t~_vzG
* @version 1.0 w1U2cbCr/
*/ wzX(]BG
public class ImprovedMergeSort implements SortUtil.Sort { w(Jf;[o
pV:;!+
private static final int THRESHOLD = 10; E/+H~YzO
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/* B}S!l>.z
* (non-Javadoc) >2vUFq`H
* QiO4fS'~W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9|BH/&$
*/ d ?Uj3G
public void sort(int[] data) { <KY \sb9
int[] temp=new int[data.length]; y950Q%B]
mergeSort(data,temp,0,data.length-1); GO&~)Vh&7
} .kwz$b+h
fL$U%I3
private void mergeSort(int[] data, int[] temp, int l, int r) { m{#?fR=9
int i, j, k; ={~?O&Jh
int mid = (l + r) / 2; @}K|/
if (l == r) :)JIKP%$\)
return; C?dQ QB$
if ((mid - l) >= THRESHOLD) Odn`q=
mergeSort(data, temp, l, mid); )T0%<(J
else \iL{q^Im
insertSort(data, l, mid - l + 1); }`fFzb
if ((r - mid) > THRESHOLD) 96ydcJY0'
mergeSort(data, temp, mid + 1, r); @~p;.=1]F
else y-#{v.|L
insertSort(data, mid + 1, r - mid); k]>1@t
WzinEo{f
for (i = l; i <= mid; i++) { "R<c
temp = data; 4C:-1gu7
} LK>AC9ak<
for (j = 1; j <= r - mid; j++) { ?58,Ja
temp[r - j + 1] = data[j + mid]; |; [XZ ZZ
} h95a61a,Vy
int a = temp[l]; W0-KFo.'
int b = temp[r]; 1 sJtkge:
for (i = l, j = r, k = l; k <= r; k++) { v[l={am{/
if (a < b) { meF.`fh
data[k] = temp[i++]; ,]Gi942
a = temp; };{Qx
} else { Th.Mn}1%L
data[k] = temp[j--]; RKi11z
b = temp[j]; DjLSl,Z
} xVnk]:c
} TKH!,Ow9A
} %>io$o
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/** ,vcg%~-
* @param data y,/Arl}yc
* @param l W^e"()d/Z
* @param i gI T3A*x
*/ 6Mc&gnN
private void insertSort(int[] data, int start, int len) { Ot<vn34mt:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y/vGt_^;3<
} xcHuH-}
} 3aY^6&
} L$zB^lSM
} 1XppC[))
!+EE*-c1c
堆排序： E\Qm09Dj`<
qrr[QEFW
package org.rut.util.algorithm.support; [z[<onFIq
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import org.rut.util.algorithm.SortUtil; wH0m^?a!3
'}5Yc,
/** 0Z4o3r[
* @author treeroot w;p~|!
* @since 2006-2-2 alp}p
* @version 1.0 k>.n[`>$6|
*/ p)e?0m26
public class HeapSort implements SortUtil.Sort{ (5/>arDn
xJ rKH
/* (non-Javadoc) `b:yW.#w3l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z#vU~1W
*/ 7Zw.mM!i
public void sort(int[] data) { 2kfX_RK
MaxHeap h=new MaxHeap(); )`z{T
h.init(data); #S|DoeFs
for(int i=0;i h.remove(); o%SD\zk
System.arraycopy(h.queue,1,data,0,data.length); N|-'Fu
} ^[g7B"`K5
S x0QPX
private static class MaxHeap{ 5H^"
ExxD w_VGT
void init(int[] data){ 0!tw)HR%
this.queue=new int[data.length+1]; ~Gj%z+<
for(int i=0;i queue[++size]=data; !;, Dlq-}
fixUp(size); "6t#
} Q!ReA{
} o6ag{Yp
wa%;'M&
private int size=0; AuIg=-xR
)`,Y^`F2
private int[] queue; ;&} rO.0
^Q9!DF m
public int get() { Sg+0w7:2
return queue[1]; |aX1PC)o_
} WNO!6*+
zDohp 5,
public void remove() { D!WyT`T
SortUtil.swap(queue,1,size--); ;^DG P
fixDown(1); ,!>1A;~wT
} ;)XB'
file://fixdown Hs`j6yuc9
private void fixDown(int k) { mx=2lL`
int j; xgq `l#
while ((j = k << 1) <= size) { n6C]JWG\/U
if (j < size %26amp;%26amp; queue[j] j++; _%gu<Ys
if (queue[k]>queue[j]) file://不用交换 vrX@T?>
break; [X^Oxs
SortUtil.swap(queue,j,k); ZW@%>_JR]
k = j; z@Uf@~+U
} iOrpr,@
} `Kb"`}`_vm
private void fixUp(int k) { ] ^s,
while (k > 1) { b^^ .$Gu
int j = k >> 1; Q:^.Qs"IK
if (queue[j]>queue[k]) oD.[T)G?
break; TfnBPO
SortUtil.swap(queue,j,k); I6vy:5d
k = j; U'p-Ko#
} UAEu.AT
} UlQS]f~
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} ,)35Vi;.
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} VdOcKP.
m&a 8/5
SortUtil： rWULv
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package org.rut.util.algorithm; x2h5,.K
}8eu 9~
import org.rut.util.algorithm.support.BubbleSort; {?RVw`g&f
import org.rut.util.algorithm.support.HeapSort; R5& R~1N
import org.rut.util.algorithm.support.ImprovedMergeSort; !4mg]~G
import org.rut.util.algorithm.support.ImprovedQuickSort; <! Z06
import org.rut.util.algorithm.support.InsertSort; %3Tz%>n
import org.rut.util.algorithm.support.MergeSort; ;"w?@ELE
import org.rut.util.algorithm.support.QuickSort; jxqKPMf>@%
import org.rut.util.algorithm.support.SelectionSort; x%RG>),U
import org.rut.util.algorithm.support.ShellSort; @Yj+u2!
>_|$7m.?n[
/** 9$*O^
* @author treeroot ?:DUsg
* @since 2006-2-2 d:8c}t2X
* @version 1.0 ^_c6Op<F
*/ #p7K2
public class SortUtil { N%Uk/ c'
public final static int INSERT = 1; n^iq?u
public final static int BUBBLE = 2; y Q-{ CJ,
public final static int SELECTION = 3; rsn^YC
public final static int SHELL = 4; Ohn?>qQ
public final static int QUICK = 5; d;hv_h
public final static int IMPROVED_QUICK = 6; s2`Qh9R
public final static int MERGE = 7; H&SoVi_V
public final static int IMPROVED_MERGE = 8; _lMSW6
public final static int HEAP = 9; D~b_nFD
;Q>+#5H6F8
public static void sort(int[] data) { czg9tG8
sort(data, IMPROVED_QUICK); YR-Ge
} :^rt8>~
private static String[] name={ N~|Z@pU"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X" Upml
}; mlix^P
iHKX#*
private static Sort[] impl=new Sort[]{ y$y!{R@
new InsertSort(), R3|r`~@@
new BubbleSort(), X'J!.Jj
new SelectionSort(), 6~^ M<E
new ShellSort(), |*(R$tX
new QuickSort(), *CCh\+S7m
new ImprovedQuickSort(), VT [TE
new MergeSort(), -?p4"[
new ImprovedMergeSort(), {Jc.49
new HeapSort() :Z&<5
}; ^v5<*uf%m
<Uc?#;%Y}
public static String toString(int algorithm){ fM`.v+
return name[algorithm-1]; P09f
} -pW*6??+?
Q<>b3X>O
public static void sort(int[] data, int algorithm) { G|b I$
impl[algorithm-1].sort(data); Sjp ]TWj
} 3IG<Ot9
"A]#KTP
public static interface Sort { yJ4ZB/ZQ
public void sort(int[] data); L*FQ`:lZ
} y.$Ae1a=
8/k"A-m
public static void swap(int[] data, int i, int j) { gC+?5_=<
int temp = data; C7FxV2
data = data[j]; ]$i@^3`[w
data[j] = temp; B[s
} apgR[=Oy
} 2ElZ&(RZJF