[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; x,-S1[#X;
} ??+:vai2
int i1=l; X4 Y
int i2=mid+1; ULTNhq R*n
for(int cur=l;cur<=r;cur++){ Q%M_
if(i1==mid+1) Dpj-{q7C
data[cur]=temp[i2++]; ]F_r6*<
else if(i2>r) :Fo4O'UC
data[cur]=temp[i1++]; iRouLd
else if(temp[i1] data[cur]=temp[i1++]; rV U:VL`2
else 9C?cm:
data[cur]=temp[i2++]; FRS28D
} DOT=U _
} 59K}
CnQg*+
} xi.IRAZX
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改进后的归并排序: yYBNH1
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package org.rut.util.algorithm.support; p}f-c
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import org.rut.util.algorithm.SortUtil; hafECs
tU(y~)]
/** 2J&XNV^tJ
* @author treeroot C;%Y\S
* @since 2006-2-2 ,y%ziay
* @version 1.0 kI<WvgoL
*/ [tOuNj:
public class ImprovedMergeSort implements SortUtil.Sort { k~R{Y~W!!
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private static final int THRESHOLD = 10; $59nu7yr
a0{[P$$
/* v*vn<nPAQ>
* (non-Javadoc) p}&Md-$1
* y]<#%Fh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wge ho
*/ Ia'x]#~
public void sort(int[] data) { w)^\_uAlS
int[] temp=new int[data.length]; Jxn3$
mergeSort(data,temp,0,data.length-1); }E,jR=@
} Nr%(2[$ =
2Gm-\o&Td"
private void mergeSort(int[] data, int[] temp, int l, int r) { P6:;Y5e0
int i, j, k; :b<KX%g
int mid = (l + r) / 2; xl3zy~;M
if (l == r) D{Oq\*
return; q[Vi[b^F
if ((mid - l) >= THRESHOLD) 8s~\iuk
mergeSort(data, temp, l, mid); IO*l vy
else hR!}u}ECd
insertSort(data, l, mid - l + 1); \hrrPPD1z
if ((r - mid) > THRESHOLD) %N>\:85?
mergeSort(data, temp, mid + 1, r); 8.[&wyU
else K]ca4Z
insertSort(data, mid + 1, r - mid); bI#<Ee0nJ
5Yn{?r\#F
for (i = l; i <= mid; i++) { W _J&M4
temp = data; ) b/n)%6
} ENO? ;
for (j = 1; j <= r - mid; j++) { b~jIv:9T
temp[r - j + 1] = data[j + mid]; wKGogf[(%
} 6NzBpur 2H
int a = temp[l]; n}0za#G
int b = temp[r]; is9}ePC7Xu
for (i = l, j = r, k = l; k <= r; k++) { 5GaoJ v
if (a < b) { '7t|I6$ow
data[k] = temp[i++]; IKGTsA;
a = temp; tp%|AD"
} else { `bzr_fJ
data[k] = temp[j--]; I88Zrhw
b = temp[j]; KS b(R/T
} El'yiJ
} 75kKDR}6
} xrfPZBLy
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/** r|*:9|y{"/
* @param data R$Zv0a&
* @param l |MR%{ZC^i
* @param i 3R'.}^RN
*/ B*y;>q "{U
private void insertSort(int[] data, int start, int len) { h (qshbC}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0{-`Th+h
} #fwzFS \XL
} Ica3
} 4sb )^3T
} .F4oo=
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堆排序： +mivqR~{{
w~4 z@/^"p
package org.rut.util.algorithm.support; =x=1uXQv5
nrF%wH/5
import org.rut.util.algorithm.SortUtil; T_uNF8Bh
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/** u/_Gq[Q,u
* @author treeroot ri#,ec|J
* @since 2006-2-2 &}>|5>cJu
* @version 1.0 tvTWZ`
*/ 9!5b2!JL
public class HeapSort implements SortUtil.Sort{ Lwp-2`%
Hr /W6C
/* (non-Javadoc) 1a5?)D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U&,r4>V@h>
*/ M`)s>jp@w
public void sort(int[] data) { m &9)'o
MaxHeap h=new MaxHeap(); \P*PjG?R
h.init(data); P)Z/JHB
for(int i=0;i h.remove(); Uc\|X;nkRk
System.arraycopy(h.queue,1,data,0,data.length); '&N: S-
} 2_Pz^L
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private static class MaxHeap{ N =x]AC,
BHF{-z
void init(int[] data){ `x2fp6
this.queue=new int[data.length+1]; W8Ke1(ws&
for(int i=0;i queue[++size]=data; ^?E^']H)5u
fixUp(size); DhY;pG,t
} B1x'5S;Bq
} {'h)
tU9rCL:P
private int size=0; L.SDMz
9+]ZH.(YE
private int[] queue; ;n3uV`\
sXSj OUI
public int get() { [Xs}FJ
return queue[1]; -;l`hRW
} 'wCS6_K
-$AjD?;
public void remove() { 0\V\qAk
SortUtil.swap(queue,1,size--); DfAiL(
fixDown(1); oN.Mra]D
} %2^['8t#NH
file://fixdown gcX5Q^`a=
private void fixDown(int k) { TvQWdX=
int j; p3V9ikyy
while ((j = k << 1) <= size) { A28ZSL
if (j < size %26amp;%26amp; queue[j] j++; @uQ%o%Ru6
if (queue[k]>queue[j]) file://不用交换 r$b:1C~
break; !JT<(I2
SortUtil.swap(queue,j,k); gUksO!7^1
k = j; Rg%R/p)C
} :`{9x%o;
} &i4 (s%z#
private void fixUp(int k) { fGu5%T,
while (k > 1) { 6&i[g
int j = k >> 1; K~7'@\2 ?
if (queue[j]>queue[k]) p+u{W"I`
break; vN{vJlpY
SortUtil.swap(queue,j,k); ]+}:VaeA
k = j; VFe-#"0ZO
} d[~au=b
} ^JYF1
#nU@hOfg
} Wwn5LlJ^
0z#l0-NdQ
} (1j(* ?2
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SortUtil： hXV4$Dai
/V#MLPA
package org.rut.util.algorithm; 5A0KV7N5
nG&w0de<>
import org.rut.util.algorithm.support.BubbleSort; T+&x{+gZ
import org.rut.util.algorithm.support.HeapSort; h1Ke$#$6
import org.rut.util.algorithm.support.ImprovedMergeSort; sq8tv]
import org.rut.util.algorithm.support.ImprovedQuickSort; uf{SxEa
import org.rut.util.algorithm.support.InsertSort; '0\0SL
import org.rut.util.algorithm.support.MergeSort; 5pNvzw
import org.rut.util.algorithm.support.QuickSort; yrxx+z|wR
import org.rut.util.algorithm.support.SelectionSort; 0hHIz4(
import org.rut.util.algorithm.support.ShellSort; oN1!>S9m
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/** x]yHBc
* @author treeroot ')5jllxv
* @since 2006-2-2 iqU.a/~y
* @version 1.0 !nP8ysB
*/ cHqvkN`
public class SortUtil { TzD:bKE&
public final static int INSERT = 1; o=a:L^nt,
public final static int BUBBLE = 2; 7?kXgR[#d
public final static int SELECTION = 3; #C;#$|d
public final static int SHELL = 4; 2:smt)f
public final static int QUICK = 5; zJB+C=]D7H
public final static int IMPROVED_QUICK = 6; ,g<>`={kK+
public final static int MERGE = 7; :kf3_?9rc
public final static int IMPROVED_MERGE = 8; [#H8=
public final static int HEAP = 9; )w}*PL
B}TInI%H
public static void sort(int[] data) { 44/0}v]
sort(data, IMPROVED_QUICK); @&am!+z
} j`LT`p"9S
private static String[] name={ 9hz7drhR;\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oHP>v_X
}; ?z4uze1
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private static Sort[] impl=new Sort[]{ Ep v3/`I
new InsertSort(), <.y^
new BubbleSort(), D_,_.C~O
new SelectionSort(), yK @X^jf
new ShellSort(), x~3>1Wr#M
new QuickSort(), BIb{<tG^N
new ImprovedQuickSort(), "6[Ax{cM
new MergeSort(), KweHY,
new ImprovedMergeSort(), ek+8hnkh
new HeapSort() ~'PS|
}; K>DnD0
z=8_%r
public static String toString(int algorithm){ I'6ed`|
return name[algorithm-1]; \nWzn4f
} ]aL [
#!<+:y'S?
public static void sort(int[] data, int algorithm) { %r}KvJgd
impl[algorithm-1].sort(data); V,"AG
} \fQgiX
4n.i<K8K[
public static interface Sort { lHj7O&+
public void sort(int[] data); 9X^-)G>
} J^<j=a|D
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public static void swap(int[] data, int i, int j) { HzO0K=Z=R0
int temp = data; )Or:wFSMq
data = data[j]; .J7-4
data[j] = temp; W4] 0qp`\
} 0ghwFo
} se*pkgWbz