[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; B2$cY;LH
} O95gdxc
int i1=l; 4=^Ha%l
int i2=mid+1; Ms5qQ<0v_
for(int cur=l;cur<=r;cur++){ *%jtcno=Y
if(i1==mid+1) w3 vZ}1|
data[cur]=temp[i2++]; AfO.D?4x
else if(i2>r) ^zT=qBl
data[cur]=temp[i1++]; Z>R@
else if(temp[i1] data[cur]=temp[i1++]; 3 []ltN_
else -a|b.p
data[cur]=temp[i2++]; #w5%^HwO
} (p#c p
} C=Fu1Hpb
m#[c]v{
} o@PvA1
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改进后的归并排序: E|-5=!]fX
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package org.rut.util.algorithm.support; F> Ika=z,
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import org.rut.util.algorithm.SortUtil; jdVj FCl^#
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/** aLLI\3
* @author treeroot 0#Us*:[6
* @since 2006-2-2 n?6^j8i
* @version 1.0 5FB3w48
*/ 46 0/eW\
public class ImprovedMergeSort implements SortUtil.Sort { lz>.mXdx
wO!>kc<
private static final int THRESHOLD = 10; nt&% sM-X
lUq`tK8
/* v;z8g^L
* (non-Javadoc) 5IzCQqOPgX
* @JdeOL;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =s:kC`O
*/ Kn1u1@&Xd
public void sort(int[] data) { vnbY^ASdw
int[] temp=new int[data.length]; &09~ D8f'
mergeSort(data,temp,0,data.length-1); ?G9DSk?6%Z
} VFq\{@- %
ODpAMt"
private void mergeSort(int[] data, int[] temp, int l, int r) { %>zG;4
int i, j, k; @pJ;L1sn
int mid = (l + r) / 2; AGwdM-$iT
if (l == r) ^f(El(w
return; M`=\ijUwN
if ((mid - l) >= THRESHOLD) wD6QN
mergeSort(data, temp, l, mid); =*-ac
else 1:DA{ejS
insertSort(data, l, mid - l + 1); r4 5}o
if ((r - mid) > THRESHOLD) $*XTX?,'
mergeSort(data, temp, mid + 1, r); -zt*C&)b
else O]="ggq&
insertSort(data, mid + 1, r - mid); F2(^OFh
GX.a!XQ@!
for (i = l; i <= mid; i++) { WqCER^~'>
temp = data; 9zBt a
} }HbUB$5
for (j = 1; j <= r - mid; j++) { Xk/:a}-l
temp[r - j + 1] = data[j + mid]; Yu[MNX;G
} K`|V1L.m
int a = temp[l]; *r~6R
int b = temp[r]; WwKpZ67$R
for (i = l, j = r, k = l; k <= r; k++) { `X&d:!}F
if (a < b) { KeyHxU=?
data[k] = temp[i++]; fgo3Gy*#
a = temp; ]P^3uXi
} else { %f&Bt,xEo
data[k] = temp[j--]; m+pK,D~{"
b = temp[j]; {pRa%DF
} #H8QX5b)
} ^}z:FI
} \D%n8O
E%f!SD
/** tM:$H6m/(
* @param data dleLX%P
* @param l IMy!8$\u
* @param i bg|=)sw4
*/ K_X(j$2Xc
private void insertSort(int[] data, int start, int len) { p+2%LYR u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yS#D$q2_
} 8rz,MsFR
} jlD3SF~2
} ^h<ElK
} J,`I>^G
U!lWP#m
堆排序： 3/su1M[
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package org.rut.util.algorithm.support; 7:C2xC
1Zp^X:(
import org.rut.util.algorithm.SortUtil; fAT M?
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/** bde6 ;=oM
* @author treeroot _[hVGCSB
* @since 2006-2-2 f(-3d*g
* @version 1.0 Aacj?
*/ 61z^(F$@
public class HeapSort implements SortUtil.Sort{ &y2DI"Ff
rAu@`H?
/* (non-Javadoc) C9`x"$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sQ82(N7l
*/ +|O&k
public void sort(int[] data) { t(- 5l
MaxHeap h=new MaxHeap(); vqwSOh|P9
h.init(data); xC$CRzAe5p
for(int i=0;i h.remove(); e]l.m!,r
System.arraycopy(h.queue,1,data,0,data.length); iM{aRFL
} Z&y9m@
g6q67m<h
private static class MaxHeap{ Q"`J-#L
'A#l$pJp7
void init(int[] data){ 4--[.j*W
this.queue=new int[data.length+1]; z Q11dLjs
for(int i=0;i queue[++size]=data; -<n]Sv;V
fixUp(size); GEfTs[
} VQ`a-DL
} f(*^zga,
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private int size=0; _O>8jH!#
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private int[] queue; 6y)NH 8l7
^$F1U,oi
public int get() { j}@n`[V1
return queue[1]; C?VNkBJ>\
} Q>>II|~;J
Ceak8#|4
public void remove() { 3R$*G8v
SortUtil.swap(queue,1,size--); g E;o_~
fixDown(1); o51jw(wO
} R9lb<`
file://fixdown *`wgqin
private void fixDown(int k) { 6"Rw&3D?
int j; CN<EgNt1kN
while ((j = k << 1) <= size) { #R3|nL
if (j < size %26amp;%26amp; queue[j] j++; qCgoB 0
if (queue[k]>queue[j]) file://不用交换 K)r|oW=6Y
break; R8<P}mv
SortUtil.swap(queue,j,k); Lkl^ `
k = j; !%%(o%bi~
} @t?uhT*Z=
} _V-pr#lP1
private void fixUp(int k) { k'JfXrW<!
while (k > 1) { Omy<Y@$
int j = k >> 1; *k ^?L
if (queue[j]>queue[k]) 'Q F@@48
break; _mn2bc9M
SortUtil.swap(queue,j,k); E*X-f"
k = j; El#"vIg(\
} ,$<="kJk
} %T'<vw0
9&}i[x4
} 8[xl3=
<mX EX`?
} ]KE"|}B
%#$K P
SortUtil： Y]6kA5
C4^o= 6{
package org.rut.util.algorithm; 6@; P
H$={i$*,Y
import org.rut.util.algorithm.support.BubbleSort; ErXzKf
import org.rut.util.algorithm.support.HeapSort; _?QVc0S!
import org.rut.util.algorithm.support.ImprovedMergeSort; 5isqBu
import org.rut.util.algorithm.support.ImprovedQuickSort; *'jI>^o
import org.rut.util.algorithm.support.InsertSort; wY6m^g$h3
import org.rut.util.algorithm.support.MergeSort; ;fGh]i
import org.rut.util.algorithm.support.QuickSort; /Mmts=^Ja
import org.rut.util.algorithm.support.SelectionSort; ;"Q.c#pA$g
import org.rut.util.algorithm.support.ShellSort; ^'ac|+
I$HO[Z!
/** s2*~n_B
* @author treeroot FH7h?!|t
* @since 2006-2-2 #4BwYj(Sl
* @version 1.0 h"$)[k~
*/ b:t|9FE%
public class SortUtil { I)wc&>Lc
public final static int INSERT = 1; oo2CF!Xy
public final static int BUBBLE = 2; h1REL^!c
public final static int SELECTION = 3; o4F(X0
public final static int SHELL = 4; 7X`]}z4g
public final static int QUICK = 5; ^LAnR>mz^r
public final static int IMPROVED_QUICK = 6; s_}q
public final static int MERGE = 7; Jy?; <
public final static int IMPROVED_MERGE = 8; s@D/.X
public final static int HEAP = 9; ^ZPynduR
<@H`5[R
public static void sort(int[] data) { u%sfHGrH
sort(data, IMPROVED_QUICK); l#bE_PD;
} ;fe~PPT
private static String[] name={ Gw-y6e'|Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" </]a`h]
}; *w$3/
C8t;E`
private static Sort[] impl=new Sort[]{ as3*49^9
new InsertSort(), >0E3Em<(}l
new BubbleSort(), R@~=z5X(Q
new SelectionSort(), H;{IOBo
new ShellSort(), F4DJML-(
new QuickSort(), *3\Nj6
new ImprovedQuickSort(), sWv!ig_
new MergeSort(), 7_ s7);
new ImprovedMergeSort(), H/}W_ h^^
new HeapSort() [P*zm8b
}; +vt?3i\^.
COA*Q
public static String toString(int algorithm){ g&I|@$\
return name[algorithm-1]; j:E3c\a
} # 11<=3Yj
M$s9
public static void sort(int[] data, int algorithm) { =$SvKzN
impl[algorithm-1].sort(data); (f;.`W
} bF'Jm*f
bT15jNa
public static interface Sort { S$n?
public void sort(int[] data); K_F"j!0
} -QK-w>
i}5M'~F
public static void swap(int[] data, int i, int j) { 5a&BgBO1M
int temp = data; _B0C]u3D
data = data[j]; 9Ed=`c
data[j] = temp; uCoy~kt292
} >i"WKd=
} W`uq,r0Xsy