[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; {.`vs;U
} @?ebuj5{e
int i1=l; P|`8}|}a
int i2=mid+1; zg>zUe bA
for(int cur=l;cur<=r;cur++){ "2!&5s,1p
if(i1==mid+1) C-xr"]#]
data[cur]=temp[i2++]; @b\$yB@z
else if(i2>r) 1> ?M>vK
data[cur]=temp[i1++]; n>z9K')
else if(temp[i1] data[cur]=temp[i1++]; IZf{nQ[0
else >[f?vrz
data[cur]=temp[i2++]; 4>YR{
} cs48*+m
} _r#Z}HK
qyb?49I
} H;mSkRD3N
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改进后的归并排序: "37lx;CH
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package org.rut.util.algorithm.support; YO`]UQ|dc
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import org.rut.util.algorithm.SortUtil; t}a: p6D]
kb%;=t2
/** A.F%Ycq
* @author treeroot a9e>iU
* @since 2006-2-2 {'flJ5]
* @version 1.0 je\Ph5"
*/ 85= )lu
public class ImprovedMergeSort implements SortUtil.Sort { rCEyQ)R_}
y`iBFC;_
private static final int THRESHOLD = 10; F-QzrquS
Xxj- 6i
/* 8bGd} (
* (non-Javadoc) Mc lkEfn
* W_293["lS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S)(.,x
*/ + /G2fhE
public void sort(int[] data) { {L971W_L
int[] temp=new int[data.length]; 2YL?,uLS
mergeSort(data,temp,0,data.length-1); Z9E\,Ly
} `%bypHeSp
J6"9v;V
private void mergeSort(int[] data, int[] temp, int l, int r) { -]Bq|qTH[(
int i, j, k; >tS'Q`R
int mid = (l + r) / 2; d7^}tM
if (l == r) b#c:u2
return; &N9 a<w8+
if ((mid - l) >= THRESHOLD) zC:ASt
mergeSort(data, temp, l, mid); b)#hSjWO#
else -:^U_FL8un
insertSort(data, l, mid - l + 1); NSMyliM1Y
if ((r - mid) > THRESHOLD) BU)U/A8iS
mergeSort(data, temp, mid + 1, r); wVXS%4|v
else $QF{iV@6d4
insertSort(data, mid + 1, r - mid); f^ZRT@`O
>~rTqtKd
for (i = l; i <= mid; i++) { O^PKn_OJ
temp = data; G&SB-
} x^qVw5{n
for (j = 1; j <= r - mid; j++) { ;<Sd~M4f
temp[r - j + 1] = data[j + mid]; )6MfRw
} ?PxP% $hS
int a = temp[l]; ~hH REI&
int b = temp[r]; w_c"@CjkE
for (i = l, j = r, k = l; k <= r; k++) { X56q-|
if (a < b) { T.F!+
data[k] = temp[i++]; hW')Sp
a = temp; P;y45b
} else { RU{twL.B
data[k] = temp[j--]; ? V1*cVD6i
b = temp[j]; yu {d! {6
} @ y.?:7I
} >{]%F*p4
} G5_=H,Vmd
g'f@H-KCD
/** tIi&;tw]
* @param data dbLZc$vPj
* @param l OO\+J
* @param i YDsb3X<0'
*/ 2szPAuN+
private void insertSort(int[] data, int start, int len) { lBE=(A`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7Die FZ?
} NX.6px17
} GKqm&/M*=
} ;O5zUl-`
} %Xd[(Q)
5ta `%R_
堆排序： 4B;=kL_f
@IKYh{j4
package org.rut.util.algorithm.support; "^[ 'y7i
bP#:Oi0v`
import org.rut.util.algorithm.SortUtil; NYUL:Tp
v"$L702d$\
/** tT8%yG}
* @author treeroot 2|y"!JqE1
* @since 2006-2-2 |i*37r6]=
* @version 1.0 u#fM_>ML
*/ /62!cp/F/D
public class HeapSort implements SortUtil.Sort{ P5V}#;v
6wRd<]C
/* (non-Javadoc) ,t744k')
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UgRiIQMq.
*/ ztY}5A2`
public void sort(int[] data) { VCfl`Aq'l
MaxHeap h=new MaxHeap(); &B;~
h.init(data); p>N(Typ0b
for(int i=0;i h.remove(); *R,5h2;
System.arraycopy(h.queue,1,data,0,data.length); EWt[z.`T1
} //MUeTxR
**0~K";\
private static class MaxHeap{ sdrfsrNvB-
]cvwIc">
void init(int[] data){ 0auYG><=
this.queue=new int[data.length+1]; FUzzB94a
for(int i=0;i queue[++size]=data; 1\m[$Gs:
fixUp(size); P;no?
} :kV#y
} }#+^{P3;
}&D WaO]J7
private int size=0; {WS;dX4
uMv,zO5
private int[] queue; 8d{0rqwNE
L{\8!51L
public int get() { 3&4(ZH=
return queue[1]; }6~hEc*/"
} M0"_^?
y<3-?}.aZ
public void remove() { #z%fx
SortUtil.swap(queue,1,size--); kH1~k,|\&K
fixDown(1); 'oVx#w^mf
} n&/ `
file://fixdown DfD&)tsMQ
private void fixDown(int k) { N>1em!AS
int j; Oo~; L,
while ((j = k << 1) <= size) { 5;WH:XM
if (j < size %26amp;%26amp; queue[j] j++; ;;t yoh~t
if (queue[k]>queue[j]) file://不用交换 (,2SXV
break; h"W,WxL8
SortUtil.swap(queue,j,k); SulY1,
k = j; gVuFHHeUz
} VQ@
} e%M;?0j
private void fixUp(int k) { Y|qTyE%
while (k > 1) { {S\{Ii6
int j = k >> 1; ?$pCsBDo
if (queue[j]>queue[k]) yPp9\[+^j
break; cVpp-Z|s8
SortUtil.swap(queue,j,k); IPpN@
k = j; y.k~Y0
} 8Fh)eha9f
} >'$Mp<
Y@iS_lR
} N~gzDQ3
ejd(R+
} /nsX]V6i
M_f:A
SortUtil： 6@!`]tSCK
T>Z<]s
package org.rut.util.algorithm; :-Z2:/P
qR{=pR
import org.rut.util.algorithm.support.BubbleSort; cjY-y-vO
import org.rut.util.algorithm.support.HeapSort; 6MW{,N
import org.rut.util.algorithm.support.ImprovedMergeSort; P+sW[:
import org.rut.util.algorithm.support.ImprovedQuickSort; 3?yg\
import org.rut.util.algorithm.support.InsertSort; (CL%>5V
import org.rut.util.algorithm.support.MergeSort; l'qg8
import org.rut.util.algorithm.support.QuickSort; D_7,m%Z:
import org.rut.util.algorithm.support.SelectionSort; T-L||yE,h
import org.rut.util.algorithm.support.ShellSort; vr l-$ii
X?',n 1
/** }.(B}/$u
* @author treeroot 00y!K m_D
* @since 2006-2-2 uzPVTo|=
* @version 1.0 q`-N7 ,$T
*/ eByz-,{P
public class SortUtil { e*C(q~PQ
public final static int INSERT = 1; _VN?#J)o
public final static int BUBBLE = 2; 3"i-o$P
public final static int SELECTION = 3; ]6`%
public final static int SHELL = 4; ObS3 M
public final static int QUICK = 5; ]m<$}
public final static int IMPROVED_QUICK = 6; I236RIq
public final static int MERGE = 7; (ZizuHC
public final static int IMPROVED_MERGE = 8; F>l] 9!P|m
public final static int HEAP = 9; RqrdAkg
P@B]
public static void sort(int[] data) { x9g#<2w8
sort(data, IMPROVED_QUICK); p6@)-2^
} n\DV3rXI9
private static String[] name={ bE..P&"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4$<JHo @.
}; cq]6XK-W
[q-h|m
private static Sort[] impl=new Sort[]{ eym4=k ~
new InsertSort(), "8MF_Gu):
new BubbleSort(), 7$=InK
new SelectionSort(), KpGhQdR#
new ShellSort(), niyV8v
new QuickSort(), Hn"RH1Zy
new ImprovedQuickSort(), x;d6vBTUb
new MergeSort(), 6{b>p+U
new ImprovedMergeSort(), IJ"q~r$
new HeapSort() pnOAs&QAm
}; T5h H
4[eXe$
public static String toString(int algorithm){ cwg"c4V
return name[algorithm-1]; z:*|a+cy
} D,feF9
,qxu|9L
public static void sort(int[] data, int algorithm) { bn5 Su=]
impl[algorithm-1].sort(data); 25?6gu*Z
} HZge!Yp<
}}~|!8
public static interface Sort { C'x&Py/#
public void sort(int[] data); /8S>;5hvK@
} T~e.PP
|{ip T SH
public static void swap(int[] data, int i, int j) { L8B!u9%
int temp = data; K|, .C[
data = data[j]; 1+s;FJ2}
data[j] = temp; g- gV2$I
} "to;\9lP
} *2l7f`K