[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; >uT,Z,7O
} WyciIO1
int i1=l; IA I!a1e!
int i2=mid+1; ~(bY-6z
for(int cur=l;cur<=r;cur++){ U27YH1OK
if(i1==mid+1) KtTv0[66
data[cur]=temp[i2++]; &0cfTb)dG
else if(i2>r) ;]!QLO.bs^
data[cur]=temp[i1++]; ?!TFoD2'
else if(temp[i1] data[cur]=temp[i1++]; {~q"Y]?
else qM78s>\-h
data[cur]=temp[i2++]; HO[W2b
} rYez$e^r
} m1H|C3u8
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} d1]CN6 7{G
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改进后的归并排序: 2q]y(kW+
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package org.rut.util.algorithm.support; " E+V>V+
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import org.rut.util.algorithm.SortUtil; GPV=(}z
&iKy
/** =`Ii?xo
* @author treeroot z7TMg^9#
* @since 2006-2-2 Io_bS+
* @version 1.0 hK^(Y
*/ z5.Uv/n\1
public class ImprovedMergeSort implements SortUtil.Sort { v2eLH:6
jMUd,j`Opx
private static final int THRESHOLD = 10; mD@*vq
r{\c.\
/* wT\JA4
* (non-Javadoc) 'kBg3E$y
* A1>fNilC9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wr);+.T9R
*/ ]M3V]m
public void sort(int[] data) { $fifx>!
int[] temp=new int[data.length]; 7p1f*N[X
mergeSort(data,temp,0,data.length-1); !UHWCJ< <w
} >_XC
w{F{7X$^
private void mergeSort(int[] data, int[] temp, int l, int r) { ($QQuM=
int i, j, k; RZMR2fP%
int mid = (l + r) / 2; X5U#^^O$E%
if (l == r) #BtJo:
return; ri.}G
if ((mid - l) >= THRESHOLD) phCItN;
mergeSort(data, temp, l, mid); aF8'^xF
else xhcFZTj/(
insertSort(data, l, mid - l + 1); _43'W{%
if ((r - mid) > THRESHOLD) lV%oIf[OB
mergeSort(data, temp, mid + 1, r); pW&K=,7|
else qAI%6d
insertSort(data, mid + 1, r - mid); T'6MAxEZUq
zTBf.A;e7
for (i = l; i <= mid; i++) { +/+>:
temp = data; P;8nC:zL
} e|-&h `[
for (j = 1; j <= r - mid; j++) { 3uXRS,C
temp[r - j + 1] = data[j + mid]; Nyx)&T&I
} h~EGRg
int a = temp[l]; '[WVP=M<XV
int b = temp[r]; !d.bCE~
for (i = l, j = r, k = l; k <= r; k++) { x-nO; L-2p
if (a < b) { ^cDHC^Wm
data[k] = temp[i++]; j_3`J8WwF
a = temp; Rf4}((y7Y\
} else { XoNBq9Iu
data[k] = temp[j--]; IL>VH`D
b = temp[j]; wK]p`:3
} {,+{,Ere
} 8sus$:Ry
} _DouVv>
;_X2E~i[
/** ,A%p9
* @param data aS! If>
* @param l m?O~(6k@C
* @param i -DuI 6K
*/ 'fjouO
private void insertSort(int[] data, int start, int len) { fI v?HD:j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !!k^M"e2
} p>N8g#G
} [$X^r<|P@
} emSky-{$u
} (b;Kl1Ql]
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堆排序： i 558&:
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package org.rut.util.algorithm.support; %?hvN
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import org.rut.util.algorithm.SortUtil; q6PG=9d0B
.H@b zm
/** Cs4ks`Z18
* @author treeroot ~^TH5n
* @since 2006-2-2 R53^3"q~
* @version 1.0 ({3Ap{Q}
*/ 1/f{1k
public class HeapSort implements SortUtil.Sort{ lqTc6@:D
r2*8.j51
/* (non-Javadoc) d&* c3F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2@N9Zk{{J
*/ ZsNZ3;d@u(
public void sort(int[] data) { ZEK,Z['
MaxHeap h=new MaxHeap(); OO2uE ;( 3
h.init(data); 9Nw&l@
for(int i=0;i h.remove(); n$rgJ
System.arraycopy(h.queue,1,data,0,data.length); Xub*i^(]
} b:5-0uxjs
jM}(?^@
private static class MaxHeap{ &\=Tm~
U8.V Rn
void init(int[] data){ 7`j%5%q
this.queue=new int[data.length+1]; %M3L<2
for(int i=0;i queue[++size]=data; ODEFs?%'
fixUp(size); ~&aULY?)]
} 7gcR/HNeF
} >0z`H|;
h,?%,GI
private int size=0; OqWm5(u&S
YkFAu8b>
private int[] queue; C*}PL
W#+f2 RR
public int get() { -2[#1S*
return queue[1]; eEBo:Rc9
} b"aF-,M>
hFo29oN
public void remove() { A`#?Bj
SortUtil.swap(queue,1,size--); eBH:_Ls_-^
fixDown(1); KL6B!B{;
} 2!6E~<~HC
file://fixdown d>?C?F
private void fixDown(int k) { 9Fy'L#%
int j; le' Kp V
while ((j = k << 1) <= size) { OwT_W)$
if (j < size %26amp;%26amp; queue[j] j++; ,CI-IR2
if (queue[k]>queue[j]) file://不用交换 a>6D3n W
break; Q6HghG
SortUtil.swap(queue,j,k); A%2B3@1'q
k = j; HC}vO0X4
} =;4K5l{c
} 1c{m rsB
private void fixUp(int k) { }N}Js*
while (k > 1) { 2-DG6\QX|
int j = k >> 1; IG{lr
if (queue[j]>queue[k]) 'A>?aUq]:
break; nU' qE
SortUtil.swap(queue,j,k); }SC&6B?G
k = j; K&n-(m%
} ttdY]+Fj
} Y0Tad?iC
a4.w2GR
} n"`V| UTHP
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} ol41%q*
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SortUtil： &XV9_{Hm
[-VK!9pQ
package org.rut.util.algorithm; N,Z*d
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import org.rut.util.algorithm.support.BubbleSort; +SF+$^T
import org.rut.util.algorithm.support.HeapSort; I`(53LCqo
import org.rut.util.algorithm.support.ImprovedMergeSort; m94PFD@N
import org.rut.util.algorithm.support.ImprovedQuickSort; &TY74w*
import org.rut.util.algorithm.support.InsertSort; \i/HHP[%
import org.rut.util.algorithm.support.MergeSort; ~&<t++ g
import org.rut.util.algorithm.support.QuickSort; =
import org.rut.util.algorithm.support.SelectionSort; IA<>+NS
import org.rut.util.algorithm.support.ShellSort; vQ*RrHG?c
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/** Pjk2tf0j`
* @author treeroot ]E-3/r$_cO
* @since 2006-2-2 xxyc^\$
* @version 1.0 $cK}Tlq
*/ A yr,
public class SortUtil { p3Qls*
public final static int INSERT = 1; z bYv}q
public final static int BUBBLE = 2; Yb^e7Eug
public final static int SELECTION = 3; `kuu}YUi
public final static int SHELL = 4; aPzn4}~/_
public final static int QUICK = 5; YHO}z}f[!
public final static int IMPROVED_QUICK = 6; Zj!,3{jX^
public final static int MERGE = 7; "5L?RkFi\
public final static int IMPROVED_MERGE = 8; >t.Lc.
public final static int HEAP = 9; {?`7D:]`^
=y-yHRC7
public static void sort(int[] data) { .SjJG67OyA
sort(data, IMPROVED_QUICK); 1&! i:F#
} "D8WdV(
private static String[] name={ r:$tvT*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \?]U*)B.r
}; )2RRa^=&
>t)Pcf|s
private static Sort[] impl=new Sort[]{ C 2nmSXV
new InsertSort(), {j9TzR
new BubbleSort(), sWo}Xq#
new SelectionSort(), QK?V^E
new ShellSort(), s2"`j-iQ
new QuickSort(), b6 %m*~
new ImprovedQuickSort(), NdRcA
new MergeSort(), _,!0_\+i
new ImprovedMergeSort(), e2v`
new HeapSort() {daX?N|V
}; gkO^J{_@q
~1D^C |%
public static String toString(int algorithm){ r) x
return name[algorithm-1]; bwzx_F/
} &muBSQ-
>U,&V%y
public static void sort(int[] data, int algorithm) { ttUK~%wSx
impl[algorithm-1].sort(data); t*9 gusmG
} I)V=$r{
$/s"It
public static interface Sort { 2L1y4nnbwo
public void sort(int[] data); CyR`&u
} 6w7;
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public static void swap(int[] data, int i, int j) { /^AH/,p
int temp = data; B;eka[xU
data = data[j]; 7JGc9K+Av
data[j] = temp; &Gh0f"?
} j{OA%G(I
} 4WvW11q8U