[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; [q<Vm-
} Z2%ySO
int i1=l; |z5`h
int i2=mid+1; 5Az4<
for(int cur=l;cur<=r;cur++){ |k3^ eeLk
if(i1==mid+1) K<_bG<tm_
data[cur]=temp[i2++]; @N?u{|R:d
else if(i2>r) [VsTyqV a
data[cur]=temp[i1++]; ~S$\ PG4
else if(temp[i1] data[cur]=temp[i1++]; l<89[{9o
else FA+'E
data[cur]=temp[i2++]; {hE\ECT-
} =/|2f; Q
} Zeeixg-1<
npJyVh47
} 3Dm`8Xt
pKxq\U
改进后的归并排序: )PU_'n=>
5Y#W$Fx($R
package org.rut.util.algorithm.support; $O)fHD'
[5iBXOmpS=
import org.rut.util.algorithm.SortUtil; ;mi+[`E
2brxV'tk
/** |#)S`Ua1
* @author treeroot {FrcpcrQa
* @since 2006-2-2 %]iDhXLr
* @version 1.0 $4&%<'l3I
*/ c(R=f+
public class ImprovedMergeSort implements SortUtil.Sort { k4AF .U`I
(PM!{u=
private static final int THRESHOLD = 10; MoFAQe
tr<iFT}C
/* XITh_S4fs=
* (non-Javadoc) SGp}(j>
* Q)$RE{*-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 15/lX
*/ \QZ~w_
public void sort(int[] data) { {zri6P+s
int[] temp=new int[data.length]; pI>[^7
mergeSort(data,temp,0,data.length-1); Q.$|TbVfds
} v'vYNh
l?UFe$9(
private void mergeSort(int[] data, int[] temp, int l, int r) { IGtpL[.;/
int i, j, k; A%zX LV=3O
int mid = (l + r) / 2; %:DH_0
if (l == r) whoQA}X>
return; /jtU<uX
if ((mid - l) >= THRESHOLD) t.ci!#/d
mergeSort(data, temp, l, mid); !qQB}sAf
else |@+/R .l
insertSort(data, l, mid - l + 1); S]O0zv^}
if ((r - mid) > THRESHOLD) $BPTk0Y
mergeSort(data, temp, mid + 1, r); @rV|7%u
else SdJGhU
insertSort(data, mid + 1, r - mid); 9 :ubPqt
! /^Jma7n
for (i = l; i <= mid; i++) { |k:ecw
temp = data; bRhc8#kw)
} He}uE0^
for (j = 1; j <= r - mid; j++) { p:/#nmC<
temp[r - j + 1] = data[j + mid]; &Oxf^x["]
} 3om_Z/k
int a = temp[l]; ZITic&>W
int b = temp[r]; ^tFbg+.
for (i = l, j = r, k = l; k <= r; k++) { KbcmK(`_
if (a < b) { c=52*&
data[k] = temp[i++]; $ncJc
a = temp; ptlcG9d-
} else { \D<w:\P
data[k] = temp[j--]; a St
b = temp[j]; ]c=nkS
} H E'1Wa0r
} ?uBZ"^'
} zBKfaQI,
?##3E, /"9
/** ?c;T4@mB
* @param data ~hk;OB;
* @param l E;vF :?|
* @param i G""L1?
*/ +pefk+
private void insertSort(int[] data, int start, int len) { Bc!ZHW*&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ; { MK
} WA$Ug
} r) SG!;X
} &l0-0T>
} FB\lUO)U\c
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堆排序： 6zf3A:]&{
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package org.rut.util.algorithm.support; !gKz=-C
Bw`7ND}&
import org.rut.util.algorithm.SortUtil; yltzf #%
|_ADG
/** Ny6 daf3f
* @author treeroot iem@K
* @since 2006-2-2 0]._|Ubn6)
* @version 1.0 9eh9@~mU"l
*/ XeJ|Z)qZ
public class HeapSort implements SortUtil.Sort{ `-J$7)d@
mx ]a@tu
/* (non-Javadoc) jO9w7u6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i"HENJyCb
*/ 0)^$9Z
public void sort(int[] data) { G8Qo]E9-/
MaxHeap h=new MaxHeap(); !idQ-&
h.init(data); (3[Lz+W.u
for(int i=0;i h.remove(); kR1dk4I4
System.arraycopy(h.queue,1,data,0,data.length); K@0/iWm*
} uh8+Y%V p
#zL0P>P'a
private static class MaxHeap{ N;6@f*3_i
/ad]pdF
void init(int[] data){ hHoc>S6^M
this.queue=new int[data.length+1]; +,H6)'#Z
for(int i=0;i queue[++size]=data; )dMXn2O
fixUp(size); wBbJ \
} rF*L@HI
} KVC$o+<'`%
|rhCQ"H
private int size=0; )=:gO`"D
8!!iwmH{
private int[] queue; M.(shIu!+
-2\%?A6L
public int get() { j0]|$p
return queue[1]; `O'@TrI
} [tP6FdS/M=
UojHlTg#bT
public void remove() { f5droys9
SortUtil.swap(queue,1,size--); Og8'K=O#
fixDown(1); |fd}B5!c
} GY[+HgT
file://fixdown Z ^w5x:
private void fixDown(int k) { xwm-)~L4T
int j; bB#6Xx
while ((j = k << 1) <= size) { QSNLo_z
if (j < size %26amp;%26amp; queue[j] j++; YdT-E
if (queue[k]>queue[j]) file://不用交换 r8uc.z2%
break; t622b?w
SortUtil.swap(queue,j,k); |}O9'fyU8
k = j; FX6*`
} =q4QBAW
} vA(')"DDT
private void fixUp(int k) { kV mJG#
while (k > 1) { 1q&gTvIp
int j = k >> 1; ?d? cD
if (queue[j]>queue[k]) )iiwxpdw
break; potb6jc?
SortUtil.swap(queue,j,k); POouO/r$
k = j; `B4Px|3
} ,Z"l3~0\
} 7LB#\2
eL7rX"!
} sHr!GF
*YhX6J1
} 8r 4 L4
qZ8V/
SortUtil： yzml4/X
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package org.rut.util.algorithm; YnCWmlC
DW,fh8w
import org.rut.util.algorithm.support.BubbleSort; z3lMD'uU3
import org.rut.util.algorithm.support.HeapSort; .-0;:>
import org.rut.util.algorithm.support.ImprovedMergeSort; wU|Y`wJmF
import org.rut.util.algorithm.support.ImprovedQuickSort; "* Qwaq_
import org.rut.util.algorithm.support.InsertSort; v8<MAq
import org.rut.util.algorithm.support.MergeSort; ?_NhR
import org.rut.util.algorithm.support.QuickSort; OcBn1k.
import org.rut.util.algorithm.support.SelectionSort; r$7D;>*O{
import org.rut.util.algorithm.support.ShellSort; c20'{kH
?b&~(,A{
/** ,uFdhA(i@'
* @author treeroot nvyyV\w
* @since 2006-2-2 #$qhxYyd
* @version 1.0 ZUW~ZZ7Z:
*/ HKr6h?Si^
public class SortUtil { &>!WhC16
public final static int INSERT = 1; r|bvpZV
public final static int BUBBLE = 2; rdL>yT/A
public final static int SELECTION = 3; |c]Y1WwDx
public final static int SHELL = 4; "I|[m%\
public final static int QUICK = 5; ~IB~>5U!
public final static int IMPROVED_QUICK = 6; kdWk{ZT^
public final static int MERGE = 7; mST/u>'
public final static int IMPROVED_MERGE = 8; -6+&?f
public final static int HEAP = 9; nsq7,%5
y?|JBf
public static void sort(int[] data) { ={a8=E!;
sort(data, IMPROVED_QUICK); *d,u)l :S
} 9tnW:Nw~
private static String[] name={ D;VFMP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =a_B'^`L
}; w:}RS.AK
tXocGM{6C
private static Sort[] impl=new Sort[]{ GUe&WW:Sqk
new InsertSort(), ya9V+/i7T_
new BubbleSort(), |!\(eLR9>
new SelectionSort(), <*Kj7o{Qn
new ShellSort(), wec|~Rc-
new QuickSort(), 8bB'[gJ]{
new ImprovedQuickSort(), J% B(4`
new MergeSort(), 7[l "=
new ImprovedMergeSort(), Dl3Df u8
new HeapSort() ~6nq$(#
}; j}=$2|}8{
"[.adiw
public static String toString(int algorithm){ [hf#$Dl|
return name[algorithm-1]; (i,TxjS'od
} FS%Xq-c
0<+=Ew5Z
public static void sort(int[] data, int algorithm) { #du!tx ( _
impl[algorithm-1].sort(data); (aX5VB**
} w*})ZYIUT
1or4s{bmo
public static interface Sort { B_k[N}|zD
public void sort(int[] data); !9l c6W
} =$B:i>z<
-P09u82
public static void swap(int[] data, int i, int j) { =NH p%|
int temp = data; [Ng#/QXk{
data = data[j]; ^G,]("di`
data[j] = temp; tZtyx;EP
} (8<U+)[tPy
} 1)aB']K%