[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; D::rGB?.b
} G\(|N9^:
int i1=l; 8(* [Fe9
int i2=mid+1; +!|9hF'
for(int cur=l;cur<=r;cur++){ NQ6sGL
if(i1==mid+1) k-}b{
data[cur]=temp[i2++]; 8Ac:_Zg
else if(i2>r) sM9+dh
data[cur]=temp[i1++]; ^`G}gWBx}w
else if(temp[i1] data[cur]=temp[i1++]; f;b[w
else O?|gp<=d
data[cur]=temp[i2++]; f!JS= N?3
} Qubp9C#r
} ^#sU*trr
Dtj&W<NXo
} G.UI|r/Kz
mrw=T.
改进后的归并排序: ghRVso(
F>rH^F
package org.rut.util.algorithm.support; e2A-;4?_
,2W8=ON
import org.rut.util.algorithm.SortUtil; rvw)-=qR[
`*shF9.\C
/** :ijAqfX
* @author treeroot " W|%~h
* @since 2006-2-2 ~sXcnxLz
* @version 1.0 D"D<+ ;S#
*/ /Sh#_\x
public class ImprovedMergeSort implements SortUtil.Sort { 6AhM=C
S;- LIv
private static final int THRESHOLD = 10; )KAEt.
rh^mJUh
/* lg&t8FHa;
* (non-Javadoc) &c,kQo+pA
* VzVc37Z>6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b1($R[
*/ 7"C$pm6
public void sort(int[] data) { j}C}:\-fY
int[] temp=new int[data.length]; Ct>GYk$
mergeSort(data,temp,0,data.length-1); UNBH
} mrjswF27$o
_FWBUZ;N
private void mergeSort(int[] data, int[] temp, int l, int r) { U-3i
int i, j, k; w.TuoWo>
int mid = (l + r) / 2; =z /dcC$r
if (l == r) @!1x7%]G
return; BSVxN
if ((mid - l) >= THRESHOLD) c3CWRi`LE
mergeSort(data, temp, l, mid); wY_)y
else _/tHD]um
insertSort(data, l, mid - l + 1); ~W-PD
if ((r - mid) > THRESHOLD) Uw7h=UQh
mergeSort(data, temp, mid + 1, r); ~ (jKz}'~U
else %B.yW`,X
insertSort(data, mid + 1, r - mid); %xyou:~0zs
K9up:.{QQ
for (i = l; i <= mid; i++) { nX`u[ks
temp = data; ]@u6HH~^
} RtM8yar+sn
for (j = 1; j <= r - mid; j++) { EU+S^SyZi
temp[r - j + 1] = data[j + mid]; )z28=%g
} Ptdpj)oi&Q
int a = temp[l]; e(<str>
int b = temp[r]; [wzb<"kW
for (i = l, j = r, k = l; k <= r; k++) { W*I(f]8:y`
if (a < b) { ?o|f':
data[k] = temp[i++]; e0,|Wm
a = temp; q}?4f*WC
} else { ys kO
data[k] = temp[j--]; "L&#lfOKG
b = temp[j]; /PSd9N*=y
} }|8_9Rx0*
} cHk)i
} AiO$<CS
}WH&iES@P
/** g0["^P1tV
* @param data :BV6y|J9O^
* @param l B e0ND2oo
* @param i _dhgAx-H)h
*/ #;2n;.a
private void insertSort(int[] data, int start, int len) { 8p:e##%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CmoE_8U>
} @X;!92i
} /k,-P
} kZGRxp9
} \6Zr
[rV>57`YD
堆排序： 4p,EBn9(
'|8} z4/g
package org.rut.util.algorithm.support; A"dR{8&0
LoN< oj5
import org.rut.util.algorithm.SortUtil; T~##,qQ
;"~ fZ2$U
/** x#xFh0CA
* @author treeroot :Ra,Eu
* @since 2006-2-2 Xx0hc 8qd
* @version 1.0 naR0@Q"\h
*/ +{f:cea (1
public class HeapSort implements SortUtil.Sort{ @a0DT=>dT
Ni-xx9)=
/* (non-Javadoc) 9\BT0kx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?FpWvyz|
*/ 67G?K;)e
public void sort(int[] data) { _n50C"X=&(
MaxHeap h=new MaxHeap(); sg3OL/"
h.init(data); T^k7o^N>
for(int i=0;i h.remove(); 9Hb6nm
System.arraycopy(h.queue,1,data,0,data.length); tne ST.
} V8C:"UZ;
pUQ/03dp
private static class MaxHeap{ p;3O#n-_
%,@e^3B
void init(int[] data){ zkuU5O
this.queue=new int[data.length+1]; eo?;`7
for(int i=0;i queue[++size]=data; o.!~8mD
fixUp(size); keX,d#
} 2j}\3Pi
} yy i#Mo ,
_M`--.{\O[
private int size=0; YA_c N5p/@
IID-k
private int[] queue; v,-HU&/*B
RL@VSHXc
public int get() { i%#+\F.&
return queue[1]; !h23cj+V
} IYS)7`{]
SwTL|+u
public void remove() { }J:U=HJ
SortUtil.swap(queue,1,size--); :~tAUy":_*
fixDown(1); gM u"2I5
} t!W(_8j
file://fixdown CUBEW~X}M
private void fixDown(int k) { :OhHb#D
int j; ^6MU 0Q2
while ((j = k << 1) <= size) { p'*>vk
if (j < size %26amp;%26amp; queue[j] j++; G\Cp7:j}
if (queue[k]>queue[j]) file://不用交换 lhAX;s&9
break; t\~P:"
SortUtil.swap(queue,j,k); |y!=J$$_H
k = j; /v1Q4mq
} +eK"-u~K
} aW)-?(6>
private void fixUp(int k) { mD$A4Y-'p
while (k > 1) { >~[c|ffyo/
int j = k >> 1; H8Bs<2
if (queue[j]>queue[k]) `>f6)C-
break; Dwr)0nk
SortUtil.swap(queue,j,k); F;4vPbH+
k = j; )U7t
} a!7A_q8M
} ?(Dq?-.
VM GS[qrG
} -D
|ef7bKU8
} eTI%^d|
[!HEQ8 2g
SortUtil： "GMBjT8
P;=n9hgHI
package org.rut.util.algorithm; f332J
SPX$U5&
import org.rut.util.algorithm.support.BubbleSort; Z_};|B}
import org.rut.util.algorithm.support.HeapSort; ;qafT@ }C
import org.rut.util.algorithm.support.ImprovedMergeSort; .h@rLorm>
import org.rut.util.algorithm.support.ImprovedQuickSort; "7'J&^|
import org.rut.util.algorithm.support.InsertSort; R_W+Ylob
import org.rut.util.algorithm.support.MergeSort; n'wU;!W9
import org.rut.util.algorithm.support.QuickSort; GK)?YM
import org.rut.util.algorithm.support.SelectionSort; sJ;g$TB
import org.rut.util.algorithm.support.ShellSort; vj'wm}/
: UGZ+
/** Bu<M\w?7Y
* @author treeroot g]<4&)~
* @since 2006-2-2 d6}r#\
* @version 1.0 D0&,?
*/ Z0x ar]4V
public class SortUtil { :mh_G
public final static int INSERT = 1; m4hX 'F
public final static int BUBBLE = 2; E4`N-3
public final static int SELECTION = 3; ]/[FR5>
public final static int SHELL = 4; m[?E
public final static int QUICK = 5; Vwg|K|
public final static int IMPROVED_QUICK = 6; L[oui,}_
public final static int MERGE = 7; D.B.7-_8
public final static int IMPROVED_MERGE = 8; ,&]S(|2%>t
public final static int HEAP = 9; 3}TaF~
>Ea8G,
public static void sort(int[] data) { ~ -4{B
sort(data, IMPROVED_QUICK); :~b3^xhc^
} lGPUIoUo
private static String[] name={ 2iY3Lsna
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [YRz*5
}; #|Y5,a,{
eJF5n#
private static Sort[] impl=new Sort[]{ "Gfh,e
new InsertSort(), l4D+Y
new BubbleSort(), jqWu
new SelectionSort(), wKtl+}}
new ShellSort(), E ]A#Uy
new QuickSort(), >BR(Wd.
new ImprovedQuickSort(), x[wq]q#*
new MergeSort(), fM]+SMZy
new ImprovedMergeSort(), @K\~O__
new HeapSort() q}`${3qQ3
}; 5L+>ewl
oRm L {UDZ
public static String toString(int algorithm){ 0LPig[
return name[algorithm-1]; 3QV*%
} nHnK)9\N
?J%1#1L"/
public static void sort(int[] data, int algorithm) { B-?6M6#
impl[algorithm-1].sort(data); yCd-9zb=
} *rM^;4Zt
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public static interface Sort { G"-?&)M#a
public void sort(int[] data); (7mAt3n k
} (|[2J3ZET
d?s<2RkPT
public static void swap(int[] data, int i, int j) { ~ZmN44?R
int temp = data; oz,np@f)J
data = data[j]; #o=y?(
data[j] = temp; b(*!$EB
} ?x$"+,
} i2@VB6]?