[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; K&U7H:
} HCa
int i1=l; wu4NLgkE
int i2=mid+1; p!<$vE
for(int cur=l;cur<=r;cur++){ {M?vBgR\B
if(i1==mid+1) .^m>AKC0cX
data[cur]=temp[i2++]; q=DN {a:
else if(i2>r) h'$9C
data[cur]=temp[i1++]; Y"6w,_'m
else if(temp[i1] data[cur]=temp[i1++]; RNhJ'&SYs
else n9\]S7]52
data[cur]=temp[i2++]; =Odv8yhn
} WwUv5GZTW
} C{q:_M;
v,\R,{0
} D^-7JbE]
Kmdlf,[3d
改进后的归并排序: RJON90,J
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package org.rut.util.algorithm.support; vYU;_R
hAjM1UQ,Y
import org.rut.util.algorithm.SortUtil; d)"?mD:m/M
;9}pOzF1q
/** 4ON_$FUe
* @author treeroot _%x4ty
* @since 2006-2-2 ]Y| 9?9d
* @version 1.0 s#S%#LM
*/ >Z;jY*
public class ImprovedMergeSort implements SortUtil.Sort { *\o/q[
\^V`ds*.
private static final int THRESHOLD = 10; !2|=PB' M
[M%9_CfZOy
/* |P.6<
* (non-Javadoc) .<K iMh
* =SAU4xjo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9P<[7u
*/ _"%B7FK
public void sort(int[] data) { zA;@@)hwR
int[] temp=new int[data.length]; XZ/[v8
mergeSort(data,temp,0,data.length-1); N|Sf=q?Ko
} <soz#}e
_6Eu2|vM&
private void mergeSort(int[] data, int[] temp, int l, int r) { 7'-j%!#w
int i, j, k; "sgjWo6
int mid = (l + r) / 2; P/ oXDI8
if (l == r) tWdhDt8$&
return; Fbp{,V@F2
if ((mid - l) >= THRESHOLD) 07/L}b`P
mergeSort(data, temp, l, mid); >2?aZ`r+
else ZK'-U,Y.H7
insertSort(data, l, mid - l + 1); 0iZGPe~
if ((r - mid) > THRESHOLD) )kJH5/
mergeSort(data, temp, mid + 1, r); 0'r%,0
else OGrBUP
insertSort(data, mid + 1, r - mid); KA276#
/n4pXT
for (i = l; i <= mid; i++) { o|j*t7
temp = data; IjfxR mV
} RuG-{NF{F
for (j = 1; j <= r - mid; j++) { +]@Az.E
temp[r - j + 1] = data[j + mid]; cM_Fp
} 7DfTfTU6
int a = temp[l]; "W#t;;9Wz
int b = temp[r]; ((rv]f{
for (i = l, j = r, k = l; k <= r; k++) { G3G6IP
if (a < b) { '&;69`FSe
data[k] = temp[i++]; -[Qvg49jy
a = temp; Xm4CKuU@
} else { YOAn4]j
data[k] = temp[j--]; c:l]=O
b = temp[j]; 3?E&}J<n
} yxBUj*3
} Q#Y k?Kv~
} WM)F0@"
#2tCV't
/** ZE`lr+_Y
* @param data ?/JBt /b
* @param l 'lS`s(
* @param i FhIqy %X
*/ 1|?K\B
private void insertSort(int[] data, int start, int len) { w^1Fi8+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R1-k3;v^
} J@9}`y=K
} 4q$H
} C#w]4$/
} ofW+_DKB?l
&)pK%SAM
堆排序： fB+b}aoV
ap}5ElMR
package org.rut.util.algorithm.support; MbXq`%
lr2rQo>
import org.rut.util.algorithm.SortUtil; c {I"R8
+3,|"g::
/** #~Q8M*~@
* @author treeroot WjMS5^ _
* @since 2006-2-2 {?{U,&
* @version 1.0 -n*;W9
*/ c0 WFlj9b
public class HeapSort implements SortUtil.Sort{ y@wF_WX2
Bfd-:`Jk
/* (non-Javadoc) j|e[s ?d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QT#6'>&7-b
*/ G*\h\@
public void sort(int[] data) { <1&Ke
MaxHeap h=new MaxHeap(); <3hA!$o~
h.init(data); K<v:-TjQZ:
for(int i=0;i h.remove(); ,PWj_}|L[
System.arraycopy(h.queue,1,data,0,data.length); *wi}>_\
} Q;nAPS
Ewo*yY>
private static class MaxHeap{ (3*UPZv
&2EBk=X
void init(int[] data){ nEy]`
this.queue=new int[data.length+1]; tk/`%Q
for(int i=0;i queue[++size]=data; Y~n`~(
fixUp(size); fn9#>~vrD
} s%;<O:x8o
} :G)<}j"sM
}iIbcA
private int size=0; `eRLc}aP2
g$j6n{Yl
private int[] queue; qvt-
/f1'm@8;
public int get() { *rqm8z50a
return queue[1]; i=v]:TOu
} fY2wDD
|ZU#IQVQfn
public void remove() { S*%iiD)
SortUtil.swap(queue,1,size--); # nfI%
fixDown(1); 7SI)1_%G
} ke/_k/
file://fixdown W'_/6_c$!
private void fixDown(int k) { r@T| e
int j; EaS~`
while ((j = k << 1) <= size) { S=gW(c2'
if (j < size %26amp;%26amp; queue[j] j++; Z{{t^+XG
if (queue[k]>queue[j]) file://不用交换 `HUf v@5
break; !v!N>f4S$
SortUtil.swap(queue,j,k); iUr xJh
k = j; dDKqq(9(`
} L)-*,$#<oW
} n_$yV:MuT!
private void fixUp(int k) { 6CNS%\A
while (k > 1) { ^{[`=P'/
int j = k >> 1; U 5`y
if (queue[j]>queue[k]) @~jxG%y86
break; yBz>0I3
SortUtil.swap(queue,j,k); $<e +r$1
k = j; J(d2:V{h
} ccO aCr
} \_oy$>;
Xa`(;CLW?
} xaXV^ZM3
MWq$AK]
} Vdvx"s[`m
w)S;J,Hv
SortUtil： /BzA(Ic/
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package org.rut.util.algorithm; 6MrKi|'X@
|}qjqtZ
import org.rut.util.algorithm.support.BubbleSort; C<he4n.
import org.rut.util.algorithm.support.HeapSort; K[?R[
import org.rut.util.algorithm.support.ImprovedMergeSort; KCXwn
import org.rut.util.algorithm.support.ImprovedQuickSort; R!{7OkC
import org.rut.util.algorithm.support.InsertSort; f]}}yBte`
import org.rut.util.algorithm.support.MergeSort; 4/L>&%8V
import org.rut.util.algorithm.support.QuickSort; $e/*/.
import org.rut.util.algorithm.support.SelectionSort; /{N))
import org.rut.util.algorithm.support.ShellSort; `F,zenk=
ez0\bym
/** >=!AL,:
* @author treeroot ?;8M^a/
* @since 2006-2-2 ,o&<WMD
* @version 1.0 96W4c]NT
*/ md6*c./Z
public class SortUtil { 3%NE/lw1
public final static int INSERT = 1; K<,Y^3]6?
public final static int BUBBLE = 2; N&B>#:
public final static int SELECTION = 3; dy_.(r5[L]
public final static int SHELL = 4; \r]('x3S
public final static int QUICK = 5; $DV-Ieb
public final static int IMPROVED_QUICK = 6; fH!=Zb_{8
public final static int MERGE = 7; a R#Cot
public final static int IMPROVED_MERGE = 8; '?R=P
public final static int HEAP = 9; p#b{xK
|'@[N,
public static void sort(int[] data) { ^"`Z1)V
sort(data, IMPROVED_QUICK); (^S5Sc=
} `9EVB;
private static String[] name={ 2nx8iA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tG 7+7Z=
}; $Z7:#cZ Y
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private static Sort[] impl=new Sort[]{ !?r/ 4
new InsertSort(), 3ExVZu$
new BubbleSort(), Ao!=um5D J
new SelectionSort(), -eYL*Pa
new ShellSort(), ,'-?:`hP'
new QuickSort(), pU[K%@sC
new ImprovedQuickSort(), c+;S<g0
new MergeSort(), jmPp-}tS7
new ImprovedMergeSort(), S%V%!803!
new HeapSort() nB}e1 /_y
}; ~mcZUiP9
H8"tbU
public static String toString(int algorithm){ o@@w^##
return name[algorithm-1]; ;7 "Y?*{
} oF&IC j0
Z`"n:'&
public static void sort(int[] data, int algorithm) { Rc%PZ}es
impl[algorithm-1].sort(data); fSC.+,qk
} `g8tq
</hR!Sb]
public static interface Sort { O &\<FT5
public void sort(int[] data); qqD0R*(C
} mE_iS?1
4`G=q^GL,
public static void swap(int[] data, int i, int j) { /^QFqM;
int temp = data; iXnx1w
data = data[j]; #?5VsD8
data[j] = temp; @YrGyq
} 573~-Jvx
} j~$)c)h"