[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; Xa,\EEmQ
} -zKxf@"
int i1=l; Q'K$L9q
int i2=mid+1; Ly>OLI0x_
for(int cur=l;cur<=r;cur++){ j5^-.sEEw
if(i1==mid+1) b#a@rh
data[cur]=temp[i2++]; ,r`UBQ}?
else if(i2>r) X;VQEDMPU
data[cur]=temp[i1++]; OH6n^WKY
else if(temp[i1] data[cur]=temp[i1++]; .6m_>Y6
else f{ ^:3"i
data[cur]=temp[i2++]; [zh"x#AyI
} %w5[*V
} J +q|$K6
YeyGN
} lhO2'#]i
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改进后的归并排序: ]?&FOzN5$P
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package org.rut.util.algorithm.support; 3sbK7,4
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import org.rut.util.algorithm.SortUtil; h1f8ktF
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/** !d8A
* @author treeroot B+"g2Y
* @since 2006-2-2 9M'DC^x*T
* @version 1.0 cAEokP
*/ )yj:PY]
public class ImprovedMergeSort implements SortUtil.Sort { qyyq&
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private static final int THRESHOLD = 10; g_q<ze
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/* H;S%Y`V
* (non-Javadoc) |=5/Rax^
* 0+`Pg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hO( RZ'{
*/ *||d\peQ
public void sort(int[] data) { g_z/{1$
int[] temp=new int[data.length]; t&}6;z 3
mergeSort(data,temp,0,data.length-1); y LM"+.?pL
} rMp9jG@3
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private void mergeSort(int[] data, int[] temp, int l, int r) { _~M^ uW^l
int i, j, k; +S9PML){h
int mid = (l + r) / 2; 8omC%a}9m
if (l == r) A5nO=
return; Qf@iU%G
if ((mid - l) >= THRESHOLD) f$F*3
mergeSort(data, temp, l, mid); 'Cc(3
else op@iGC+
insertSort(data, l, mid - l + 1); &leK}je [
if ((r - mid) > THRESHOLD) ,}J_:\j
mergeSort(data, temp, mid + 1, r); euQ.ArF
else e:-8k_0|
insertSort(data, mid + 1, r - mid); d,9`<1{9
8l>CR#%@C
for (i = l; i <= mid; i++) { '~Q2!F
temp = data; 926Tl
} }V`mp
for (j = 1; j <= r - mid; j++) { lZWX7FO'
temp[r - j + 1] = data[j + mid]; OYmi?y\
} 8)wt$b
int a = temp[l]; Bs!4H2@{(]
int b = temp[r]; FxRXPt FK
for (i = l, j = r, k = l; k <= r; k++) { r;gP}H ?
if (a < b) { y%cO#P@
data[k] = temp[i++]; -F1- e+=
a = temp; (OmH~lSO.
} else { #YK5WTn5
data[k] = temp[j--]; b,<9
b = temp[j]; )/|6'L-2
} <Kt3PyF
} >M;u*Go`QO
} g^~Kze
gEJi[E@
/** _[K#O,D,
* @param data z`U Ukl}T
* @param l c`G&KCw)d
* @param i '2nqHX D
*/ e3m*i}K}
private void insertSort(int[] data, int start, int len) { A3{0q>CC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ziEz.Wn"
} kXc25y'blP
} Q0cRH"!:
} lE5v-z? &|
} ycr"Y|
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堆排序： Q-eCHr)
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package org.rut.util.algorithm.support; cAuY4RV
K@:m/Z}|4
import org.rut.util.algorithm.SortUtil; HY}j!X
+R.N%_
/** MI#mAg<
* @author treeroot Lm%GR[tyQ
* @since 2006-2-2 w4:\N U
* @version 1.0 =f7r69I"
*/ {nMAm/kyj
public class HeapSort implements SortUtil.Sort{ Es'Um,ku
XFqJ 'R
/* (non-Javadoc) =A!S/;z>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [L~@uAMw:
*/ K%j&/T j1
public void sort(int[] data) { vO@s$qi
MaxHeap h=new MaxHeap(); -kj< 1~YW
h.init(data); b~0N^p[&%
for(int i=0;i h.remove(); d- E4~)Qy
System.arraycopy(h.queue,1,data,0,data.length); 9NpD!A&64<
} F%/h*
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private static class MaxHeap{ }5 9U}@xC
yL1bS|@
void init(int[] data){ ktH8as^54!
this.queue=new int[data.length+1]; g:#dl\k
for(int i=0;i queue[++size]=data; !<\Br
fixUp(size); v"Jgw;3
} 5OP`c<
} Mi7y&~,
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private int size=0; #-#NqX:
Qx`~g,wk8
private int[] queue; !|G(Yg7C
(lH,JX`$a
public int get() { USPTpjt8R
return queue[1]; ANMg
} ~H /2R
+M\8>/0oA
public void remove() { k9si|'
SortUtil.swap(queue,1,size--); e [0w5)X
fixDown(1); Ff4*IOZ}(
} j tA*pL'/V
file://fixdown >'=MH2;
private void fixDown(int k) { %{5n1w
int j; HgRwiIt
while ((j = k << 1) <= size) { gn1(4 o
if (j < size %26amp;%26amp; queue[j] j++; NCS!:d:Ry
if (queue[k]>queue[j]) file://不用交换 GA3sRFZdQ
break; 'cdN3i(
SortUtil.swap(queue,j,k); oQ2KW..q
k = j; T1Ta?b
} yJ2B3i@T4
} j|(Z#3J
private void fixUp(int k) { 8Jr?ZDf`
while (k > 1) { d^Di*&X
int j = k >> 1; LXfCmc9|Z
if (queue[j]>queue[k]) pa]"iZz
break; 5z/Er".P
SortUtil.swap(queue,j,k); oduDA:
k = j; e$/B_o7(
} lhLGG
} 2%UBwSiqR
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} fP-|+TyO
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} %@J1]E;
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SortUtil： LLAa1Wq
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package org.rut.util.algorithm; pK&I^r
D&:yMp(
import org.rut.util.algorithm.support.BubbleSort; o4^Fo p
import org.rut.util.algorithm.support.HeapSort; @e2}BhB2
import org.rut.util.algorithm.support.ImprovedMergeSort; x^=M6;:
import org.rut.util.algorithm.support.ImprovedQuickSort; &<x@1,
import org.rut.util.algorithm.support.InsertSort; O}ejWP8>
import org.rut.util.algorithm.support.MergeSort; )M<vAUF
import org.rut.util.algorithm.support.QuickSort; 'ktHPn ,K
import org.rut.util.algorithm.support.SelectionSort; C;B}3g&
import org.rut.util.algorithm.support.ShellSort; ?w&SW{ I
/X8<C=}
/** 7,$z;Lr0S
* @author treeroot 2&(sa0*y
* @since 2006-2-2 ' P"g\;Ij
* @version 1.0 [IBQvL
*/ yubSj*
public class SortUtil { %:C ]7gQ
public final static int INSERT = 1; r64u31.)
public final static int BUBBLE = 2; ! T9]/H?
public final static int SELECTION = 3; E@)\Lc~
public final static int SHELL = 4; C*70;:b
public final static int QUICK = 5; dKhA$f~
public final static int IMPROVED_QUICK = 6; C*6S@4k
public final static int MERGE = 7; 5_o$<\I\
public final static int IMPROVED_MERGE = 8; ./-JbW
public final static int HEAP = 9; .V'V:;BE%
?(zoTxD
public static void sort(int[] data) { Vy)hDa[&
sort(data, IMPROVED_QUICK); Wa"(m*hW
} ZXb0Y2AVx
private static String[] name={ r4 dOK] 0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %'Xk)-+y
}; &~DTZgY
Z'v-F^
private static Sort[] impl=new Sort[]{ T6#"8qz<
new InsertSort(), 'W. Vr4
new BubbleSort(), Z0,~V
new SelectionSort(), d.<~&.-$
new ShellSort(), k)(Biz398E
new QuickSort(), Y;J*4k]
new ImprovedQuickSort(), ?:rx1}:F
new MergeSort(), h rN%
new ImprovedMergeSort(), o@E/r.uK
new HeapSort() -7-['fX
}; )|#%Czd4
p#d+>7
public static String toString(int algorithm){ xBnbF[
return name[algorithm-1]; Zf*r2t1&P
} ,2[ra9n
y>VcgLIB
public static void sort(int[] data, int algorithm) { ekSY~z=/u
impl[algorithm-1].sort(data); d4^`}6@
} !E\[SjY@J
}qPhx6nP
public static interface Sort { 'md0]R|
public void sort(int[] data); 1qdZc_x
} g<*jlM1r
6iezLG5
public static void swap(int[] data, int i, int j) { PFSLyV*
int temp = data; @)YY\l#
data = data[j]; &R-H"kK?
data[j] = temp; h\[\\m O
} AD5) .}[F
} WPuz]Ty