[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; (s %T18
} i92{N$*x
int i1=l; &jl'1mZ
int i2=mid+1; :@wO' o
for(int cur=l;cur<=r;cur++){ iH9g5G`O
if(i1==mid+1) $N5VoK
data[cur]=temp[i2++]; V-}d-Y
else if(i2>r) :M`|*~V~$
data[cur]=temp[i1++]; Xl#vVyO
else if(temp[i1] data[cur]=temp[i1++]; 1(gb-u0
else Y:FV+ SI
data[cur]=temp[i2++]; t^Aios~F
} Fla[YWS
} />Wh
N;F1Z-9
} -3qB,KT
X9/V;!
改进后的归并排序: Mw?nIIu(@
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package org.rut.util.algorithm.support; CJJ 1aM
@~ N:F~
import org.rut.util.algorithm.SortUtil; 4(R O1VWsb
a)(j68c
/** //JF$o=)D
* @author treeroot %aaOws
* @since 2006-2-2 @I]uK[qd
* @version 1.0 ]"dZE2!
*/ Vvm6T@b M8
public class ImprovedMergeSort implements SortUtil.Sort { b*nytF
_R1UEE3M
private static final int THRESHOLD = 10; t+qLQY}=
J@"Pv~R
/* "@gJ[BL#
* (non-Javadoc) dg4"4\c*P
* hAOXOj1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V(L~t=k$
*/ k!xi (l<C
public void sort(int[] data) { zek\AQN
int[] temp=new int[data.length]; ,4NvD2Y
mergeSort(data,temp,0,data.length-1); OZbwquF@
} elWN-~
x1/Usupi
private void mergeSort(int[] data, int[] temp, int l, int r) { 4.,e3
int i, j, k; 37ll8
int mid = (l + r) / 2; 1UJ(._0hR
if (l == r) vPi\ vU{
return; ( ]AErz+
if ((mid - l) >= THRESHOLD) T?) U|
mergeSort(data, temp, l, mid); ~r]ZD)
else )3.udx
insertSort(data, l, mid - l + 1); 6O"Vy
if ((r - mid) > THRESHOLD) 'M_8U0k
mergeSort(data, temp, mid + 1, r); `tVBV:4\
else 7V4iPx
insertSort(data, mid + 1, r - mid); a,d\<mx
Ki^m&P
for (i = l; i <= mid; i++) { wC{=o`v
temp = data; ~"gOq"y5p
} 7Hf6$2Wh
for (j = 1; j <= r - mid; j++) { Sj+gf~~
temp[r - j + 1] = data[j + mid]; m,K\e
} RL~\/#
int a = temp[l]; #Jy+:|jJ
int b = temp[r]; /_*:
for (i = l, j = r, k = l; k <= r; k++) { q .tVNKy%
if (a < b) { w6Dysg:
data[k] = temp[i++]; /Or76kE
a = temp; y@~.b^?_u
} else { `y;&M8.
data[k] = temp[j--]; z:+Xs!S
b = temp[j]; ,T|iA/c
} oFoG+H"&7\
} ~NpnRIt
} Y;e@`.(
4-E9a_
/** agBKp!
* @param data )Si`>o3T-.
* @param l 2a5yJeaIv*
* @param i *W(b=u
*/ -3wg9uZ&
private void insertSort(int[] data, int start, int len) { SQvicZAN)`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y3 LWh}~E
} 4J!1$
} :lgIu .
} 5G(y
} K.o?g?&<
? @h
堆排序： .NCQiQ
++R-_oQ
package org.rut.util.algorithm.support; hYi-F.Qtq
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import org.rut.util.algorithm.SortUtil; d^ipf*aLC
A |NX"
/** OTN"XKa$
* @author treeroot QdO$,i'
* @since 2006-2-2 Z'S>i*Ts
* @version 1.0 XiKv2vwA
*/ {EW}Wd
public class HeapSort implements SortUtil.Sort{ }mu8fm'
dam.D.o"
/* (non-Javadoc) 6XFO@c}d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /PPk p9H{
*/ 1?7QS\`)fB
public void sort(int[] data) { B^h]6Z/O
MaxHeap h=new MaxHeap(); eFsku8$<
h.init(data); _[0Ugfz(
for(int i=0;i h.remove(); 9nM {x?
System.arraycopy(h.queue,1,data,0,data.length); "D3JdyO_S
} S_ nTp)
[0/?(i|
private static class MaxHeap{ ;wW6x
MAJvjgd..
void init(int[] data){ h2=zvD;
this.queue=new int[data.length+1]; Qksw+ZjY#{
for(int i=0;i queue[++size]=data; ;1(OC-2>d
fixUp(size); DgClN:Hw
} HeSnj-mtr}
} 7T4rx53
d[TcA2nF
private int size=0; ,LcMNPr
SB$~Btr
private int[] queue; *aG0p&n}
EnwiE
public int get() { 8Yb/ c*
return queue[1]; ~\ie/}zYj
} %}'sFum`
F4bF&% R
public void remove() { <=A&y5o
SortUtil.swap(queue,1,size--); _QXo4z!a8
fixDown(1); eRVu/TY
} pKr3(5~
file://fixdown JXPn <
private void fixDown(int k) { @o;m!CYB
int j; >x!N[N@G
while ((j = k << 1) <= size) { ffE%{B?
if (j < size %26amp;%26amp; queue[j] j++; 61jDI^:
if (queue[k]>queue[j]) file://不用交换 6|_ S|N
break; V#3VRh
SortUtil.swap(queue,j,k); ;`F0 %0d
k = j; RL)'m
} )}?dYk
} qIb(uF@l"
private void fixUp(int k) { laFkOQI
while (k > 1) { ?#FAa,
int j = k >> 1; ^e&,<+qY
if (queue[j]>queue[k]) s-8>AW ep
break; >vP^l {SD
SortUtil.swap(queue,j,k); jj.]R+.G
k = j; ceZt%3=5
} 3`, m=1[)
} k{@z87+&
Ch7eUTqA@
} AiO,zjM=
f kP WGd
} ~_S`zzcZy4
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SortUtil： YI\^hP#
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package org.rut.util.algorithm; &TK%igL
1ViDS
import org.rut.util.algorithm.support.BubbleSort; YVs{\1|'
import org.rut.util.algorithm.support.HeapSort; 1XHGW=n
import org.rut.util.algorithm.support.ImprovedMergeSort; 8,B9y D
import org.rut.util.algorithm.support.ImprovedQuickSort; 8Oc*<^{#
import org.rut.util.algorithm.support.InsertSort; F$+_Z~yt3;
import org.rut.util.algorithm.support.MergeSort; =?FA9wm
import org.rut.util.algorithm.support.QuickSort; JBU qZ
import org.rut.util.algorithm.support.SelectionSort; @|d|orMC
import org.rut.util.algorithm.support.ShellSort; x6$P(eN
r)7A# 3wId
/** WX?|iw I~
* @author treeroot qa%g'sB-b
* @since 2006-2-2 CdEJ/G:
* @version 1.0 %mxG;w$
*/ $}HSU>,%
public class SortUtil { W?6RUyMC$T
public final static int INSERT = 1; +x4o#N
public final static int BUBBLE = 2; $6Ty~.RP5H
public final static int SELECTION = 3; 7L]fCw p[
public final static int SHELL = 4; wz:wR+
public final static int QUICK = 5; [9>1e
public final static int IMPROVED_QUICK = 6; -MOf[f^
public final static int MERGE = 7; ~Q6ufTGhpM
public final static int IMPROVED_MERGE = 8; C w$y
public final static int HEAP = 9; +VU,U`W
+,PBhB
public static void sort(int[] data) { .WtaU
sort(data, IMPROVED_QUICK); &}P62&
} !{ )H
private static String[] name={ bfrBHW#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D.\p7 NJ
}; -M/ny-;`}
P+Hs6Q
private static Sort[] impl=new Sort[]{ v,2{Vr
new InsertSort(), E%40u.0
new BubbleSort(), {v2Q7ZO-
new SelectionSort(), sRYFu%
new ShellSort(), =o5hD,>e
new QuickSort(), Sc*p7o: A
new ImprovedQuickSort(), 4Ly!:GH3T
new MergeSort(), -bE{yT)7
new ImprovedMergeSort(), &JP-M=\n
new HeapSort() LiN{^g^fx
}; ]huqZI
/Wzic+v<>
public static String toString(int algorithm){ K_}vmB\2l
return name[algorithm-1]; ,AM6E63
} ;=_KLG <
ZA:YoiaC#
public static void sort(int[] data, int algorithm) { VT-&"Jn
impl[algorithm-1].sort(data); 'rz*mR8
} P'FI'2cN7
H!vvdp?Z
public static interface Sort { BWQ (>Z"
public void sort(int[] data); #V~r@,
} bup;4~g
D^f;dT;-
public static void swap(int[] data, int i, int j) { LM<OYRB(
int temp = data; !d"J,.)
data = data[j]; L$Ss]Ar=
data[j] = temp; E8)C_[QJ`
} M22^.,Z
} 7@C:4c@0