[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; zd?bHcW/h
} " 7l jc
int i1=l; &Tf=~6
int i2=mid+1; B$K7L'e+-
for(int cur=l;cur<=r;cur++){ k\4g|Lya
if(i1==mid+1) e7Yb=/F
data[cur]=temp[i2++]; [37f#p
else if(i2>r) ],BJ}~v,X
data[cur]=temp[i1++]; #]?,gwvTf
else if(temp[i1] data[cur]=temp[i1++]; ;yRwoTc)Y
else fMWXo)rzj
data[cur]=temp[i2++]; W)6U6
} x(C]O,
} &M!4]pow
y}(_SU
} t:?<0yfp&
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改进后的归并排序: :d!i[W*
OlD7-c2L]
package org.rut.util.algorithm.support; {q5hF5!`)
=2ATqb"$w
import org.rut.util.algorithm.SortUtil; f)&`mqeE
v:'P"uU;4
/** J8qu]{0I"
* @author treeroot ]pM5?^<~
* @since 2006-2-2 "Qiq/"h
* @version 1.0 LM'*OtpDG
*/ |R_xY=z?
public class ImprovedMergeSort implements SortUtil.Sort { M]8eW
+1JZB*W
private static final int THRESHOLD = 10; : L6-{9$
44/0}v]
/* C%x(`S^/
* (non-Javadoc) D{&+7C:8.
* Gaw,1Ow!`2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ByB0>G''.
*/ <.y^
public void sort(int[] data) { 1*c0\:BQ;z
int[] temp=new int[data.length]; Ggxrj'r
mergeSort(data,temp,0,data.length-1); EmBfiuX
} e>)}_b
P /f ~
private void mergeSort(int[] data, int[] temp, int l, int r) { 2Wc;hJ.1
int i, j, k; l*m]2"n]
int mid = (l + r) / 2; ]R2Z-2
if (l == r) q)zu}m
return; ^<5^9]x
if ((mid - l) >= THRESHOLD) N2S!.H!Wz
mergeSort(data, temp, l, mid); lHj7O&+
else +Fkx")
insertSort(data, l, mid - l + 1); *YEIG#`
if ((r - mid) > THRESHOLD) iz,q8}/(
mergeSort(data, temp, mid + 1, r); <R]Wy}2-
else j:vD9sdQ
insertSort(data, mid + 1, r - mid); Ff1M~MhG
FdK R{dX}
for (i = l; i <= mid; i++) { ;jY'z5PH5
temp = data; 5qODS_Eq
} 802]M
for (j = 1; j <= r - mid; j++) { KG./<"c
temp[r - j + 1] = data[j + mid]; #ui%=ja[:~
} 4j=@}!TBt
int a = temp[l]; "N[gMp6U
int b = temp[r]; D3Ea2}8
for (i = l, j = r, k = l; k <= r; k++) { W3{5Do.h
if (a < b) { 8aM% 9OU
data[k] = temp[i++]; 66y,{t
a = temp; eVbh$cIrZ
} else { `S!uj <-
data[k] = temp[j--]; 5;KT-(q~
b = temp[j]; 0a;FX0S&
} uS+b* :
} I]S(tx!
} !*QA;*e
CI]U)@\U
/** '&L
* @param data &^Q~G>A
* @param l XS~w_J#q
* @param i cH8H)55F
*/ N7|W.(
private void insertSort(int[] data, int start, int len) { (h(ZL9!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KgkB)1s@n
} r?{LQWP>e
} 6b5{
} |r*1.V(
} gZuR4Ti
j1C0LP8
堆排序： 7JK 'vT
\V7x3*nA
package org.rut.util.algorithm.support; J'&?=|
kys-~&@+
import org.rut.util.algorithm.SortUtil; J+Y|# U
fwGz00C/U
/** ,DsT:8
* @author treeroot 9#ay(g
* @since 2006-2-2 p{_O*bo
* @version 1.0 ~1z8G>R
*/ D}=i tu
public class HeapSort implements SortUtil.Sort{ [+2^n7R
"e?#c<p7
/* (non-Javadoc) f;I"tugO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |[t=.dK%
*/ Z\yLzy#8
public void sort(int[] data) { I(eR3d:
MaxHeap h=new MaxHeap(); Kd21:|!t^
h.init(data); gnK!"!nL
for(int i=0;i h.remove(); V'#u_`x"D)
System.arraycopy(h.queue,1,data,0,data.length); SVeU7Q6-
} R1rfp;
{nWtNyJpS
private static class MaxHeap{ =<tEc+!T3
8U$UI
void init(int[] data){ d:ajD
this.queue=new int[data.length+1]; AZP>\Dq
for(int i=0;i queue[++size]=data; biuo.OG]
fixUp(size); :Gk~FRA|
} */qc%!YV9
} ijSYQ
9Ei#t FMc
private int size=0; "lya|;
l"g%vS,;`
private int[] queue; =hb87g.
7q=xW6
public int get() { yL,B\YCf8
return queue[1]; R9HS%O6b6
} p 8rAtz>=J
FX%E7H
public void remove() { )W3l{T(
SortUtil.swap(queue,1,size--); 'GT`%ck
fixDown(1); ;\0RXirk
} :O=Vr]Y8K
file://fixdown JB}h}nb
private void fixDown(int k) { }z:=b8}
int j; S'fq/`2g6
while ((j = k << 1) <= size) { {[#
if (j < size %26amp;%26amp; queue[j] j++; |bUmkw
if (queue[k]>queue[j]) file://不用交换 ~Dh}E9E:
break; x/v+7Pt_
SortUtil.swap(queue,j,k); <<6#Uz.1
k = j; :RG6gvz
} )^3655mb
} VUhu"h@w%
private void fixUp(int k) { fQ) ;+
while (k > 1) { gDIB'Y
int j = k >> 1; cViCWc2
if (queue[j]>queue[k]) XS@6jbLE
break; ]C^*C|
SortUtil.swap(queue,j,k); QJ'C?hn
k = j; Nzt1JHRS
} Wb$bCR#?<
} 1Tkz!
YzVLa,[
} j$Co-b1
cQb%bmBc5
} Ac%K+Pgk.
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SortUtil： MR: {Ps&,
B(U`Zd
package org.rut.util.algorithm; [sRQd;+
DO; 2)ZQ%
import org.rut.util.algorithm.support.BubbleSort; +/'jX?7x%
import org.rut.util.algorithm.support.HeapSort; |\ L2q/u
import org.rut.util.algorithm.support.ImprovedMergeSort; nXjUTSGa)
import org.rut.util.algorithm.support.ImprovedQuickSort; otx7J\4
import org.rut.util.algorithm.support.InsertSort; KYaf7qy]
import org.rut.util.algorithm.support.MergeSort; x~.U,,1
import org.rut.util.algorithm.support.QuickSort; V2X(f6v
import org.rut.util.algorithm.support.SelectionSort; *!kg@ _0K
import org.rut.util.algorithm.support.ShellSort; 7BnP,Nd"W
OX2\H
/** ?u|g2!{_
* @author treeroot V8/o@I{U[
* @since 2006-2-2 J\BdC];
* @version 1.0 7Fx8&Z
*/ '}=M~
public class SortUtil { Z^'; xn
public final static int INSERT = 1; L $~Id
public final static int BUBBLE = 2; zc#`qa:0
public final static int SELECTION = 3; ~czt=
public final static int SHELL = 4; B(5g&+{Lq~
public final static int QUICK = 5; `:&{/|uP7
public final static int IMPROVED_QUICK = 6; *gnL0\*
public final static int MERGE = 7; SzDi=lY
public final static int IMPROVED_MERGE = 8; rm7UFMCR6i
public final static int HEAP = 9; %F7k| Na
7pNh|#Uv'
public static void sort(int[] data) { 7gkHKdJoMA
sort(data, IMPROVED_QUICK); rBL)ct
} 7RZ7q@@fgh
private static String[] name={ %AFy{l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MD,-<X)Qy
}; Ni`qU(I'|
\n5,!,A
private static Sort[] impl=new Sort[]{ ?$?Ni)Z
new InsertSort(), -;v:. [o.
new BubbleSort(), AQ&;y&+QR
new SelectionSort(), 9}=Fdt
new ShellSort(), LakP'P6`E
new QuickSort(), `?)i/jko"
new ImprovedQuickSort(), ^%nAx| 4xQ
new MergeSort(), `7LdF,OdE
new ImprovedMergeSort(), b% F|VG
new HeapSort() >,[(icyzn
}; #>0nNR[$Y
w/&#UsEIr
public static String toString(int algorithm){ ]k hY8it
return name[algorithm-1]; [W2k#-%G
} a^22H
0@ -LV:jU
public static void sort(int[] data, int algorithm) { c9Cp!.#*E
impl[algorithm-1].sort(data); az w8BK
} j9Lc2'
<_D+'[
public static interface Sort { _^KD&t%!+y
public void sort(int[] data); @=$;^}JS|
} Eq|_>f@@8
Agl[Z>Q
public static void swap(int[] data, int i, int j) { z=!xN5
int temp = data; nF)|oA
data = data[j]; qp7>_B
data[j] = temp; +;vfn>^!b
} 1e}wDMU(
} HxkhlNB