[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; dRUmC H
} HahA} Q
int i1=l; -/_hO$|W
int i2=mid+1; le6eorK8
for(int cur=l;cur<=r;cur++){ 0Z{u;FI
if(i1==mid+1) DPfN*a-P(
data[cur]=temp[i2++]; ,nJCqX~/G
else if(i2>r) $g\p)- aU
data[cur]=temp[i1++]; /sSM<r]5j
else if(temp[i1] data[cur]=temp[i1++]; @eYD@!
else f6m h_l
data[cur]=temp[i2++]; G<Urj+3/Xo
} 3&R1C>JS ]
} fONycXM]
n>,? V3ly
} p4P"U
f'Rq#b@
改进后的归并排序: CIz_v.&:
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package org.rut.util.algorithm.support; Rb0{W]opt+
**c"}S6:mC
import org.rut.util.algorithm.SortUtil; dJ~Occ1~r
xPJ@!ks9
/** 10_>EY`
* @author treeroot OX[r\
* @since 2006-2-2 Ct$\!|aR
* @version 1.0 D8`SI21P
*/ Nj +^;Y
public class ImprovedMergeSort implements SortUtil.Sort { DIgur}q)@
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private static final int THRESHOLD = 10; QiaBZAol
ktM7L{Nz
/* tUGF8?& G
* (non-Javadoc) J\Tu=f)
* w8F`RRHEE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TXqtE("BDl
*/ !E^\)=E)P
public void sort(int[] data) { @ ZN@EOM$+
int[] temp=new int[data.length]; ycf)*0k
mergeSort(data,temp,0,data.length-1); 2B+qS'OT
} T%E/k# )q
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private void mergeSort(int[] data, int[] temp, int l, int r) { &td
int i, j, k; f67t.6Vw2+
int mid = (l + r) / 2; W)L*zVj~
if (l == r) pz"}o#R"x
return; - x;xQ
if ((mid - l) >= THRESHOLD) n^<J@uC
mergeSort(data, temp, l, mid); fM"&=X
else :g{ybTSEe
insertSort(data, l, mid - l + 1); >b8-v~o{
if ((r - mid) > THRESHOLD) 0XI6gPo%
mergeSort(data, temp, mid + 1, r); 9[[$5t`8
else XJ1Bl
insertSort(data, mid + 1, r - mid); ,M$h3B\;r
FLIU}doc
for (i = l; i <= mid; i++) { 'ZAIe7i&
temp = data; T>,[V:
} S$46YQ
for (j = 1; j <= r - mid; j++) { PgsG*5WQ
temp[r - j + 1] = data[j + mid]; 2_TFc2d
} k&npC8oA
int a = temp[l]; 3;AJp_;
int b = temp[r]; I~nz~U:ak
for (i = l, j = r, k = l; k <= r; k++) { Lzx2An@R
if (a < b) { T&j:gg
data[k] = temp[i++]; pk6<wAs*?#
a = temp; 4h T!DS
} else { cGlpJ)'-{
data[k] = temp[j--]; 8YQ7XB
b = temp[j]; `chD*@76I
} =&m;5R
} [EK@f,iM
} 83VFBY2q
5>hXqNjP2
/** @QE&D+NS
* @param data VFKFO9
* @param l D58RHgY[
* @param i 6_K7!?YG7
*/ AB<%GzW0(
private void insertSort(int[] data, int start, int len) { NHe[,nIV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a'O-0]g,
} fnIF<Zt
} c GyBml1
} 8[#EC3
} U[z2{\
f<y3/jl4
堆排序： a3,A_M}M'
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package org.rut.util.algorithm.support; UK)wV
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import org.rut.util.algorithm.SortUtil; 55=YM'5]
&w:0ad|
/** &ViK9
* @author treeroot fZQ2<*)pqO
* @since 2006-2-2 Z6&bUZF$bE
* @version 1.0 cH707?p/I
*/ Z:diM$Z?7
public class HeapSort implements SortUtil.Sort{ d+"F(R9
5Ha(i [d
/* (non-Javadoc) V7D<'!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *;Za))
*/ uUe#+[bD
public void sort(int[] data) { =Z..&H5i
MaxHeap h=new MaxHeap(); m= %KaRI
h.init(data); +o35${
for(int i=0;i h.remove(); !Z0S@]C
System.arraycopy(h.queue,1,data,0,data.length); )S}.QrG
} bGK-?BE5+A
^ Z3y
private static class MaxHeap{ &PX!'%X68h
. HAFKB;
void init(int[] data){ g"`jWSt7Q
this.queue=new int[data.length+1]; 3N4kW[J2i
for(int i=0;i queue[++size]=data; [WXcp1p
fixUp(size); <RcB: h
} -h=wLYl@0i
} '@5x=>
5?|y%YH;R\
private int size=0; %vUUx+
8"rK
private int[] queue; -![{Zb@
V0n8fez b
public int get() { $QwzL/a
return queue[1]; O2xqNQ`d
} ]hRs -x
L@J$kqWY
public void remove() { UJjtDV3@_g
SortUtil.swap(queue,1,size--); JURg=r]LI
fixDown(1); iF_u/#
} YoZd,} i
file://fixdown C~PP}|<~V
private void fixDown(int k) { %&J`mq
int j; Z% ]LZ/O8
while ((j = k << 1) <= size) { w^:@g~
if (j < size %26amp;%26amp; queue[j] j++; 5i'KGL
if (queue[k]>queue[j]) file://不用交换 "2 D{X
break; h;mOfF
SortUtil.swap(queue,j,k); '-#gQxIpD
k = j; *z]P|_:&G
} @6-3D/=
} S_s;foT
private void fixUp(int k) { L!fIAd`
while (k > 1) { @Ph'!
int j = k >> 1; ]qx!51S
if (queue[j]>queue[k]) 4C3i
break; u,~+ho@
SortUtil.swap(queue,j,k); ^ '_Fd
k = j; a(uQGyr[k1
} ?OGs+G
} IvI;Q0E-3
Z/:W.*u
} ?.ofs}
;zSV~G6-
} ebLt:gGo
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SortUtil： mS.!lkV
Ds@K%f(.?w
package org.rut.util.algorithm; B5_QH8kt7
ssmJ?sl
import org.rut.util.algorithm.support.BubbleSort; qj^A
import org.rut.util.algorithm.support.HeapSort; cca]@Ox]
import org.rut.util.algorithm.support.ImprovedMergeSort; ;a[3RqmKW
import org.rut.util.algorithm.support.ImprovedQuickSort; 1yeD-M"w
import org.rut.util.algorithm.support.InsertSort; jU}
import org.rut.util.algorithm.support.MergeSort; (1'sBm7F
import org.rut.util.algorithm.support.QuickSort; r^Soqom3
import org.rut.util.algorithm.support.SelectionSort; @@}muW>;T
import org.rut.util.algorithm.support.ShellSort; K k^!P*#
G#='*vOtO
/** 6!){-IV
* @author treeroot J+`gr_&
* @since 2006-2-2 TC ;Aj|)N
* @version 1.0 tq*{Hil>P`
*/ ;cb='s
public class SortUtil { BJqb'Hjd
public final static int INSERT = 1; }}wSns
public final static int BUBBLE = 2; [mF=<G"
public final static int SELECTION = 3; VotI5O $
public final static int SHELL = 4; \;+b1
public final static int QUICK = 5; (D+%*ax
public final static int IMPROVED_QUICK = 6; #Zn+-Ih
public final static int MERGE = 7; .SBN^fq
public final static int IMPROVED_MERGE = 8; dhuIVBp!!e
public final static int HEAP = 9; uuy0fQQ8ti
- @KT#
public static void sort(int[] data) { j92+kq>Xd
sort(data, IMPROVED_QUICK); g}vU*g ;
} wD@ wOC
private static String[] name={ $:?=A5ttuo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %F<3_#Y
}; (e<p^TJ]
K81&BVx/
private static Sort[] impl=new Sort[]{ W#^p%?8pR
new InsertSort(), w_Z*X5u
new BubbleSort(), sZokiFJ
new SelectionSort(), -Q1~lN m:
new ShellSort(), d"+ _`d=`
new QuickSort(), vY,]f^F"
new ImprovedQuickSort(), Tn$| Xa+:s
new MergeSort(), NE Z ]%
new ImprovedMergeSort(), k7z{q/]M
new HeapSort() x6|QTO
}; ^{g+HFTA@
|G)bnmi7
public static String toString(int algorithm){ ;;LiZlf
return name[algorithm-1]; aQ)g7C
} *Oy%($'
?[lKft
public static void sort(int[] data, int algorithm) { -AKbXkc~\
impl[algorithm-1].sort(data); o7g6*hJz
} HGW;]8xl
{dV!sQD
public static interface Sort { >JN[5aus
public void sort(int[] data); M5S<N_+Pe
} ?QzN\fY;
~ o5h}OU"
public static void swap(int[] data, int i, int j) { `]<~lf
int temp = data; E8We2T[^M
data = data[j]; |U="B4
data[j] = temp; td2bL4
} q -^Z=,<
} }5"19 Go?