[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; 5(\H:g\z
} 5Ic'6AIz
int i1=l; Ql1J?9W
int i2=mid+1; w7%.EA{N
for(int cur=l;cur<=r;cur++){ ?onEqH>
if(i1==mid+1) FX %(<M
data[cur]=temp[i2++]; b|DiU}
else if(i2>r) Wt M1nnJp
data[cur]=temp[i1++]; u9*7Buou^
else if(temp[i1] data[cur]=temp[i1++]; 5-RA<d#
else b[2 #t
data[cur]=temp[i2++]; AX]cM)w
} ?Q[b1:;Lm
} ujf]@L?
Djr/!j
} pV(qan,
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改进后的归并排序: 3^,p$D<T:,
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package org.rut.util.algorithm.support; 0JXXJ:dB
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import org.rut.util.algorithm.SortUtil; ]Om;bmwt
6W/uoH=;
/** ILIv43QKM(
* @author treeroot 0<)Ep~!
* @since 2006-2-2 UZ;FrQ(l{
* @version 1.0 hEA;5-m
*/ (XNd]G
public class ImprovedMergeSort implements SortUtil.Sort { 98Y1-Z^ .
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private static final int THRESHOLD = 10; jSQM3+`b
"#.L\p{Zy
/* ?BRZ){)
* (non-Javadoc) Ov;q]Vn>
* C'6c,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L>n^Q:M
*/ X2mZ~RB(p
public void sort(int[] data) { >-j([%
int[] temp=new int[data.length]; 4xF}rm
mergeSort(data,temp,0,data.length-1); o0_H(j?
} z .+J\
-U{!'e8YiN
private void mergeSort(int[] data, int[] temp, int l, int r) { sitgz)Ki^
int i, j, k; (@NW2
int mid = (l + r) / 2; eB9F35[
if (l == r) Flaqgi/j
return; : cPV08i
if ((mid - l) >= THRESHOLD) y/>Nx7C0=2
mergeSort(data, temp, l, mid); >@EwfM4[e
else wlDo(]mj=O
insertSort(data, l, mid - l + 1); kyf(V)APPu
if ((r - mid) > THRESHOLD) "iJAM`Hi
mergeSort(data, temp, mid + 1, r); P! P` MX
else @QDUz>_y
insertSort(data, mid + 1, r - mid); 24*3m&fA*K
+I@2,T(eG
for (i = l; i <= mid; i++) { f\z9?Z(~
temp = data; 1 J[z ![Tf
} TA+#{q+a
for (j = 1; j <= r - mid; j++) { _TyQC1 d
temp[r - j + 1] = data[j + mid]; ; hU9_e
} p7L6~IN
int a = temp[l]; f[q_eY
int b = temp[r]; rS0#]Gg
for (i = l, j = r, k = l; k <= r; k++) { r;O?`~2'4
if (a < b) { <9x|)2P
data[k] = temp[i++]; X*a7`aL
a = temp; b/4gs62{k
} else { lUiO|
data[k] = temp[j--]; tPDB'S:&3
b = temp[j]; \}Kad\)
} z'zC
} !q8A!P4|'
} n65fT+;
Q;@w\_OR
/** wKJK!P
* @param data #+^l3hMK
* @param l G }M!
* @param i eTt{wn;6
*/ }dSFv
private void insertSort(int[] data, int start, int len) { nZ`=Up p)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #Z]<E6<=9
} fVq,?
} >P6U0
} AI .2os*
} kEg~yN
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堆排序： (; Zl
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package org.rut.util.algorithm.support; )Y?E$=M+B
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import org.rut.util.algorithm.SortUtil; e co=ia
%;`3I$
/** ND5E`Va5R
* @author treeroot i{PX=
* @since 2006-2-2 #elaz8 5
* @version 1.0 bre6SP@
*/ ^N~Jm&I
public class HeapSort implements SortUtil.Sort{ 6.4,Qae9E
W*D*\E
/* (non-Javadoc) C%'eF`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H{;8i7%
*/ UOIZ8Po
public void sort(int[] data) { ? oGmGKq
MaxHeap h=new MaxHeap(); taOsC!Bp
h.init(data); I3?:KVa
for(int i=0;i h.remove(); 7M9s}b%?
System.arraycopy(h.queue,1,data,0,data.length); "2@Ys*e
} $w<~W1\:
LZu_-I
private static class MaxHeap{ J15$P8J
~#[ ZuMO?
void init(int[] data){ L G9#D
this.queue=new int[data.length+1]; Q&9& )8-
for(int i=0;i queue[++size]=data; bRAf!<3
fixUp(size); *-9b!>5eD
} U0S}O(Ptr
} 9$'Edi=6
fmq^AnKd
private int size=0; %K]nX#.B&
'w7{8^Z2
private int[] queue; O~&l.>??
G,i%:my7
public int get() { 8%#uZG\}
return queue[1]; >Y/1%Hp9
} 3'2}F%!Mv
N:/$N@"Ge
public void remove() { #$%gs]
SortUtil.swap(queue,1,size--); Sq==)$G
fixDown(1); k07) g:_
} k .l,>s`!
file://fixdown |wj/lX7y
private void fixDown(int k) { rQ$A|GJL
int j; W.,J'
while ((j = k << 1) <= size) { O"9f^y*
if (j < size %26amp;%26amp; queue[j] j++; i&FC-{|Z
if (queue[k]>queue[j]) file://不用交换 9Au+mIN
break; _>:g&pS/
SortUtil.swap(queue,j,k); 4%j&]PASa1
k = j; vR~*r6hX8
} Sb[rSczS~
} T}]Ao
private void fixUp(int k) { zFuUv_t
while (k > 1) { c\4n7m,y
int j = k >> 1; Bv@m)$9\+3
if (queue[j]>queue[k]) JT^E`<nn
break; @4B2O"z`
SortUtil.swap(queue,j,k); )3B5"b,
k = j; |_2ANWHz
} 3]Lk}0atpL
} ::T<de7
Yhw* `"X
} (Fgt#H(B
j*:pW;)^
} fZ g*@RR
S s`0;D1
SortUtil： .DvAX(2v
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package org.rut.util.algorithm; NxX1_d
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import org.rut.util.algorithm.support.BubbleSort; usTCn3u
import org.rut.util.algorithm.support.HeapSort; !d0@^JbM"
import org.rut.util.algorithm.support.ImprovedMergeSort; c\b>4 &n
import org.rut.util.algorithm.support.ImprovedQuickSort; z:G9Uu3H(
import org.rut.util.algorithm.support.InsertSort; GyPN)!X@.&
import org.rut.util.algorithm.support.MergeSort; : }IS=A
import org.rut.util.algorithm.support.QuickSort; TQ2Tt"
import org.rut.util.algorithm.support.SelectionSort; 3CHte*NL=
import org.rut.util.algorithm.support.ShellSort; M{4_BQ4$
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/** er#=xqUY
* @author treeroot u ?Xku8 1l
* @since 2006-2-2 TnaIRJ\B
* @version 1.0 uU\iji\
*/ B&$89]gs|
public class SortUtil { N+V-V-PVk
public final static int INSERT = 1; fIcv}Y
public final static int BUBBLE = 2; tj&A@\/
public final static int SELECTION = 3; l&A`
public final static int SHELL = 4; I^|bQ3sor
public final static int QUICK = 5; O9yQ9sl
public final static int IMPROVED_QUICK = 6; ^,5.vfES
public final static int MERGE = 7; Vi|jkyC8
public final static int IMPROVED_MERGE = 8; 4>E2G:
public final static int HEAP = 9; Mww]l[1'EL
t}FMBGo[
public static void sort(int[] data) { T7Ac4LA
sort(data, IMPROVED_QUICK); /YbL{G )j}
} ZD{srEa/a
private static String[] name={ Wd}mC<rv1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }a1UOScO0
}; 80EY7#r@w
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private static Sort[] impl=new Sort[]{ %ze1ZWO{
new InsertSort(), .'1j5Y-l`N
new BubbleSort(), j5O*H_D
new SelectionSort(), ;Z_C3/b
new ShellSort(), -DnK)u\@
new QuickSort(), h<.[U $,
new ImprovedQuickSort(), <.B s`P
new MergeSort(), S8RB0^Q7
new ImprovedMergeSort(), ]EnaZWyO]
new HeapSort() 5!zvoX9
}; dE]"^O#Mc
G~L?q~b
public static String toString(int algorithm){ GvOAs-$
return name[algorithm-1]; ODEXQl}R
} (O2HB-<rY
vWH>k+9&X
public static void sort(int[] data, int algorithm) { jTr4A-"
impl[algorithm-1].sort(data); YoJ'=z,e
} { NJ>[mKg
|q2lTbJ
public static interface Sort { H|U/tU-
public void sort(int[] data); e}[we:
} &'b}N
?ljod6
public static void swap(int[] data, int i, int j) { ] <3?=$
int temp = data; S\5k'ifh
data = data[j]; znO00qX
data[j] = temp; &;U7/?Q
} i q:Q$z&
} Te}yQ=+