[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; 3$G &~A{
} g8kS}7/
int i1=l; zncKd{Q\tP
int i2=mid+1; u.;l=tzz
for(int cur=l;cur<=r;cur++){ VkFMr8@|
if(i1==mid+1) cDS\=Bf
data[cur]=temp[i2++]; 52ExRG S
else if(i2>r) 0Xb,ne 7
data[cur]=temp[i1++]; >e^bq/'
else if(temp[i1] data[cur]=temp[i1++]; 6dgwsl~
else =U'!<w<-
data[cur]=temp[i2++]; T[Lz4;TRk5
} [n4nnmM
} Wz%H?m:g#
jh(T?t$&
} jIEntk
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改进后的归并排序: 9A~w2z\G
rtNYX=P
package org.rut.util.algorithm.support; iYD5~pK8
e.\dqt~%y
import org.rut.util.algorithm.SortUtil; <p/zm}?')
DG?g~{Y~b
/** t'1g+g
* @author treeroot bFjH*~ P
* @since 2006-2-2 pu~b\&^G
* @version 1.0 ,oykOda:|
*/ (@->AJF1\
public class ImprovedMergeSort implements SortUtil.Sort { I3HO><of
)pSA|Qt N
private static final int THRESHOLD = 10; kMJ}sS
$GP66Ev
/* 60;_^v
* (non-Javadoc) eSQkW
* d~ +(g!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _B>'07D0
*/ OClG dFJ|
public void sort(int[] data) { oqAO@<dL!
int[] temp=new int[data.length]; aVCPaYe^
mergeSort(data,temp,0,data.length-1); yIhPB8QL
} s]]lB018O\
63'm @oZ
private void mergeSort(int[] data, int[] temp, int l, int r) { s_ t/
int i, j, k; C~egF=w
int mid = (l + r) / 2; tn#cVB3
if (l == r) fLnwA|n=
return; O}>@G
if ((mid - l) >= THRESHOLD) l^Ob60)2
mergeSort(data, temp, l, mid); 793 15A
else >TMd1?,
insertSort(data, l, mid - l + 1); LN~mKoW
if ((r - mid) > THRESHOLD) ]DKRug5
mergeSort(data, temp, mid + 1, r); Q 9fK)j1$
else EB| iW2'
insertSort(data, mid + 1, r - mid); nfbR"E jXr
/5)*epF+
for (i = l; i <= mid; i++) { ugNt7P,^
temp = data; |QS3nX<
} NB1KsvD{
for (j = 1; j <= r - mid; j++) { l]4=W<N
temp[r - j + 1] = data[j + mid]; !NH(EWER
} $TfB72
int a = temp[l]; rRg,{:;A
int b = temp[r]; D'<L6w`
for (i = l, j = r, k = l; k <= r; k++) { R\|,GZ!`+
if (a < b) { 1~t.2eUG
data[k] = temp[i++]; ]XU4nNi
a = temp; HdN5zl,q
} else { |Fe[RGi+8
data[k] = temp[j--]; y_X jY
b = temp[j]; aX`uF<c9
} :h5G|^
} j*@@H6G
} Mh*r)B~%[
+@=V}IO
/** yAfwQ$Ll7
* @param data q[_qZ
* @param l yfK}1mx)j
* @param i VxBBZsZO~
*/ ;+<IWDo
private void insertSort(int[] data, int start, int len) { }%p:Xv@X!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I%u 2 ce
} "Yh;3tI4*
} GQ;0KIN
} n1J u=C
} kh9'W<tE
D3cJIVM
堆排序： o>_})WM1[
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package org.rut.util.algorithm.support; ])wdd>'
@>HTbs6W
import org.rut.util.algorithm.SortUtil; i+h*<){X
iI{L>
/** <mQXS87
* @author treeroot `*Yw-HL
* @since 2006-2-2 UB.1xcI
* @version 1.0 UxL*I[z5
*/ 5X20/+aT
public class HeapSort implements SortUtil.Sort{ :ZM9lBYh
uX*2Rs$s
/* (non-Javadoc) 4~,Z 'k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d #1Y^3n
*/ H"FK(N\
public void sort(int[] data) { *{3d+j/?/
MaxHeap h=new MaxHeap(); lG)wa
h.init(data); \P*_zd@%
for(int i=0;i h.remove(); C< 9x\JY%
System.arraycopy(h.queue,1,data,0,data.length); 2 ^m}5:0
} 6@s!J8!
f^FFn32u
private static class MaxHeap{ 7pm'b,J<
r }lGcG)
void init(int[] data){ N[po)}hp
this.queue=new int[data.length+1]; k5I;Y:~`
for(int i=0;i queue[++size]=data; hI'WfF!X
fixUp(size); rW)h?, b
} =p8uP5H
} BB6[(Z
^O18\a
private int size=0; fZ$b8
T&lgWOls
private int[] queue; TI'v /=;)
=vbG'_[7
public int get() { 053bM)qW
return queue[1]; uZC=]Ieh
} UDHWl_%L
ECOJ .^
public void remove() { ~Q&J\'GQH
SortUtil.swap(queue,1,size--); HU'Mi8xxy
fixDown(1); M76p=*
} 5EFt0?G
file://fixdown 2#>;cn\
private void fixDown(int k) { a_RY Yj
int j; riDb!oC
while ((j = k << 1) <= size) { 17 Ugz?
if (j < size %26amp;%26amp; queue[j] j++; 4rU/2}.q
if (queue[k]>queue[j]) file://不用交换 ( zWBrCX
break; <0})%V?-
SortUtil.swap(queue,j,k); X:oOp=y]|
k = j; W:_-I4q~
} &BRk<iwV
} L[x`i'0B
private void fixUp(int k) { 9MMCWMV
while (k > 1) { Y;/@[AwF
int j = k >> 1; aUaeK(x:H
if (queue[j]>queue[k]) 6kYluV+j
break; vqSpF6F q
SortUtil.swap(queue,j,k); F\ B/q
k = j; =rA?,74
} 4!IuTPmr
} nGH6D2!F
N&HI)X2&
} >v]^nJl
iH8we,s'
} wXIRn?z
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SortUtil： )[ V8YiyU
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package org.rut.util.algorithm; 50cVS)hG6d
'^UHY[mX8
import org.rut.util.algorithm.support.BubbleSort; GbSCk}>
import org.rut.util.algorithm.support.HeapSort; C[L 5H
import org.rut.util.algorithm.support.ImprovedMergeSort; .9bi%=hP
import org.rut.util.algorithm.support.ImprovedQuickSort; Y4rxnXGw
import org.rut.util.algorithm.support.InsertSort; Lc{AB!Br
import org.rut.util.algorithm.support.MergeSort; ANhqS
import org.rut.util.algorithm.support.QuickSort; iXDG-_K
import org.rut.util.algorithm.support.SelectionSort; 9{u=
import org.rut.util.algorithm.support.ShellSort; qYK^S4L
MgXZN{
/** o701RG~)
* @author treeroot csy6_q(
* @since 2006-2-2 MTu\T
* @version 1.0 Sq5,}oT_{j
*/ BJjic%V
public class SortUtil { ,"EaZ/Bl/
public final static int INSERT = 1; 2lTt
public final static int BUBBLE = 2; }J#HIE\RG
public final static int SELECTION = 3; T#ls2UL*xh
public final static int SHELL = 4; Xq?>a+B
public final static int QUICK = 5; B!wN%>U
public final static int IMPROVED_QUICK = 6; 8,U~ p<Gz
public final static int MERGE = 7; !D=!
public final static int IMPROVED_MERGE = 8; 8 0tA5AP
public final static int HEAP = 9; bo\ bs1
76l. {TXF
public static void sort(int[] data) { EpS/"adI-!
sort(data, IMPROVED_QUICK); &;DCN
} y!b2;- Dp
private static String[] name={ G"/;Cq=t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K2xB%m1LK
}; H8eEBMGo
L^JU{\C
private static Sort[] impl=new Sort[]{ QLJ\>
new InsertSort(), ]64Pk9z=
new BubbleSort(), tx09B)0
new SelectionSort(), ji/`OS-iq
new ShellSort(), [+\He/M6
new QuickSort(), 2j-l<!s
new ImprovedQuickSort(), A%^?z.
new MergeSort(), ctP+ECH
new ImprovedMergeSort(), n9Fq^^?
new HeapSort() evyjHcCx
}; RN`TUCQL
NfoHQU<n
public static String toString(int algorithm){ MSCH6R"5
return name[algorithm-1]; \l/(L5gY
} d:'{h"M6
Qsbyy>o)
public static void sort(int[] data, int algorithm) { QNbZ)
impl[algorithm-1].sort(data); Nw"df=,{
} ;P S4@,
;>PHkJQ
public static interface Sort { Ae2N"%Ej
public void sort(int[] data); .q2r!B
} Bl+\|[yd
uuM1_nD[
public static void swap(int[] data, int i, int j) { HM% +Y47a
int temp = data; U^_\V BAk
data = data[j]; 1K/HVj+'.
data[j] = temp; ?8O5%IrJ
} g:!U,<C^a
} (-S^L'v62v