[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; tOlzOBzR
} <7sF<KD
int i1=l; ~]i]kU
int i2=mid+1; OmoplJ+
for(int cur=l;cur<=r;cur++){ pE YrmC
if(i1==mid+1) lL(}dbT~N
data[cur]=temp[i2++]; lhW#IiX
else if(i2>r) R+@sHsZ@
data[cur]=temp[i1++]; qU /Wg
else if(temp[i1] data[cur]=temp[i1++]; O #p)~V8~
else i&SBW0)
data[cur]=temp[i2++]; JXZ:Wg
} Cx1Sh#9
} z!t3xFN&/
Kr+Bty
} A{n*NxKCX!
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改进后的归并排序: eL]w' }\
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package org.rut.util.algorithm.support; =c5 /cpZ^
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import org.rut.util.algorithm.SortUtil; iA{chQBr
aF4V|?+
/** [XY:MUe
* @author treeroot r)Mx.`d!
* @since 2006-2-2 3<1HqU
* @version 1.0 m%[2x#
*/ Hhce:E@K
public class ImprovedMergeSort implements SortUtil.Sort { b$$L]$q2
6r-<XNv)0
private static final int THRESHOLD = 10; zxynEdO
xVwi }jtG|
/* cvLcre% >A
* (non-Javadoc) 4)>\rqF+v
* *M**h-p2'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \VhpB
*/ S92!jp/
public void sort(int[] data) { MM58w3Mz
int[] temp=new int[data.length]; #VMBn}
mergeSort(data,temp,0,data.length-1); N%M>,wT
} BzG!Rg|J
qT-nD}
private void mergeSort(int[] data, int[] temp, int l, int r) { yrvSbqR
int i, j, k; A5>gLhl7
int mid = (l + r) / 2; Bbe/w#Z
if (l == r) YQ[&h
return; 9Av- ;!]
if ((mid - l) >= THRESHOLD) ~?8x0
mergeSort(data, temp, l, mid); 4 *2>R8SX~
else TQxc?o
insertSort(data, l, mid - l + 1); /\Y%DpG$
if ((r - mid) > THRESHOLD) ~ @"Qm;} "
mergeSort(data, temp, mid + 1, r); Ul~}@^m]4}
else Ivgwm6M
insertSort(data, mid + 1, r - mid); V44sNi
J Wyoh|
for (i = l; i <= mid; i++) { 7_d#XKz@
temp = data; ;hJ/t/7
} #lVl?F+~
for (j = 1; j <= r - mid; j++) { DuC u6j
temp[r - j + 1] = data[j + mid]; @OL3&R
} [8J}da}
int a = temp[l]; ~Sem_U`G
int b = temp[r]; '' A[`,3
for (i = l, j = r, k = l; k <= r; k++) { 1J%qbh
if (a < b) { :R?| 2l
data[k] = temp[i++]; *]UEF_
a = temp; . L6@Rs
} else { y7L4jO9h
data[k] = temp[j--]; >A@D;vx
b = temp[j]; >~bj7M6t
} gZ%O<XO
} Vgb>3]SU
} X72X:"
OQb9ijLeK
/** ;cHI3V
* @param data fyoB]{$p8
* @param l aZ:?(u]
* @param i 2n+XML
*/ g1!L. On
private void insertSort(int[] data, int start, int len) { 9p'J(`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ny?m&;^r:
} IF?B`TmZ
} OU3+SYM
} {zN_l!
} 5$G??="K
Xq)%w#l5?
堆排序： '!L1z45
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package org.rut.util.algorithm.support; ~E|V{z%
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import org.rut.util.algorithm.SortUtil; %_=R&m'n`
U=#ylQ
/** Z1lF[d,f;
* @author treeroot U\GZ
* @since 2006-2-2 V4i%|vV
* @version 1.0 N S}`(N
*/ G(3la3\(
public class HeapSort implements SortUtil.Sort{ E&tmWOMj>
DT]p14@t9
/* (non-Javadoc) :mHtK)z~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S7>gNE;%]u
*/ [k{iN1n
public void sort(int[] data) { Q>c6ouuJ
MaxHeap h=new MaxHeap(); ->9xw
h.init(data); "@?kxRn!
for(int i=0;i h.remove(); Nn7@+g)
System.arraycopy(h.queue,1,data,0,data.length); y8n1IZ*#SZ
} TFA
]TprPU39
private static class MaxHeap{ P&`r87J
l%5%oN`4
void init(int[] data){ [MP:Eeg
this.queue=new int[data.length+1]; S&) >w5*]U
for(int i=0;i queue[++size]=data; O!+5As
fixUp(size); * CGdfdxW
} &_hCs![
} =9@yJ9c-
'*Mb .s"
private int size=0; mnaD KeA
ga9:*G!b{)
private int[] queue; =0yJ2[R7Do
&/FwV'
public int get() { xyWdzc](p
return queue[1]; :R\v# )C
} eyjUNHeh#
:Aiu!}\
public void remove() { p+D6Z'B
SortUtil.swap(queue,1,size--); sBI%lrO
fixDown(1); !T(Omve)
} YEoT_>A$dB
file://fixdown V *y
private void fixDown(int k) { ,PxQ[CGg
int j; ^#nWgo7{7
while ((j = k << 1) <= size) { zm"g,\.d
if (j < size %26amp;%26amp; queue[j] j++; <]qd9mj5
if (queue[k]>queue[j]) file://不用交换 tX}S[jdq
break; DA@hf
SortUtil.swap(queue,j,k); fsuvg jlE
k = j; yyDBW`V((
} -s "$I:v
} xmx;tq
private void fixUp(int k) { VjMuU"++@
while (k > 1) { 4ux5G`oL
int j = k >> 1; Y &+/[[
if (queue[j]>queue[k]) *lO+^\HXD
break; TBT*j&!L
SortUtil.swap(queue,j,k); WfO$q^'?DP
k = j; CxQ,yd;>
} Khd,|pM
} Bz~h-
s\R?@
} t+q`h3
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} 1\{F.v
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SortUtil： gi >{`.]
X;>} ;LiK
package org.rut.util.algorithm; =upP3rw
H;&t"Ql.
import org.rut.util.algorithm.support.BubbleSort; .w)t<7 y
import org.rut.util.algorithm.support.HeapSort; %;?3A#
import org.rut.util.algorithm.support.ImprovedMergeSort; :!hH`l}p
import org.rut.util.algorithm.support.ImprovedQuickSort; !S{<Xc'wv
import org.rut.util.algorithm.support.InsertSort; !WnI`
import org.rut.util.algorithm.support.MergeSort; ji=po;g=E
import org.rut.util.algorithm.support.QuickSort; }`FPe
import org.rut.util.algorithm.support.SelectionSort; 7?] p\`
import org.rut.util.algorithm.support.ShellSort; ob #XKL
FR"^?z?}p
/** Xy&#}S}9
* @author treeroot $c47cJO)W
* @since 2006-2-2 Or>[_3
* @version 1.0 zxdO3I
*/ Jl ?Q}SB
public class SortUtil { KL`>mJo$
public final static int INSERT = 1; v}D!
public final static int BUBBLE = 2; *?&O8SSBH
public final static int SELECTION = 3; iK:]Q8b
public final static int SHELL = 4; )>p6h]]a
public final static int QUICK = 5; >FNt*tX<0
public final static int IMPROVED_QUICK = 6; }iAi`_\0;
public final static int MERGE = 7; ~T9[\nU\
public final static int IMPROVED_MERGE = 8; itvdzPO
public final static int HEAP = 9; a| cD{d
iKY&gnu"
public static void sort(int[] data) { _AHVMsz@
sort(data, IMPROVED_QUICK); YfKty0
} V|7CYkB8
private static String[] name={ 4/|=0TC;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UMaKvr-C&
}; ;v\n[
N/VIP0Kb
private static Sort[] impl=new Sort[]{ zY-m]7Yf
new InsertSort(), sA.yb,Fw
new BubbleSort(), ` 454=3H
new SelectionSort(), JM%#L*;
new ShellSort(), +dv@N3GV
new QuickSort(), {%Sww:
new ImprovedQuickSort(), ?|dz"=y
new MergeSort(), h6t>yC\
new ImprovedMergeSort(), v2V1&-
new HeapSort() eGil`:JY"
}; Y~xZ{am
2Oa-c|F
public static String toString(int algorithm){ 6 -}gqkR
return name[algorithm-1]; *93 N0m4Rl
} i\G3 u#
DBRJtU!5x
public static void sort(int[] data, int algorithm) { }dM^6 Kd%
impl[algorithm-1].sort(data); qQ_QF
} D6WsEd>
\2!$HA7P
public static interface Sort { U_No/$ b
public void sort(int[] data); W]OT=6u8o
} gP@ni$n
+|;IIwo
public static void swap(int[] data, int i, int j) { 4KnDXQ%
int temp = data; ,+&j/0U
data = data[j]; E.9F~&DPJ<
data[j] = temp; 8^lXM-G-
} Xc^~|%+
} U<b!$"P9