[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; ]0'cdC
} 07SW$INb
int i1=l; cS Lj\'`b
int i2=mid+1; AO`@&e]o
for(int cur=l;cur<=r;cur++){ hRXnig{;3
if(i1==mid+1) <SJ6<'
data[cur]=temp[i2++]; SOG(&)b
else if(i2>r) h<LS`$PK;E
data[cur]=temp[i1++]; 9wCgJ$te
else if(temp[i1] data[cur]=temp[i1++]; 7Wef[N\x
else D?y-Y
data[cur]=temp[i2++]; pF6u3]
} +E9G"Z65iP
} ~H#c-B
0(d!w*RpG
} ,62~u'hR5
.}F 39TS2
改进后的归并排序: zq+2@"q
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package org.rut.util.algorithm.support; \V'fB5
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import org.rut.util.algorithm.SortUtil; <`-sS]=d}
t$qIJt$
/** 8r>\scS
* @author treeroot UQkd$w<
* @since 2006-2-2 .qe+"$K'n
* @version 1.0 CV HKP[-
*/ ?`OFn F,K
public class ImprovedMergeSort implements SortUtil.Sort { _b>z'4_'
"E7<S5cr
private static final int THRESHOLD = 10; 6{d?3Jk
U}HSL5v
/* ir}*E=*
* (non-Javadoc) v@G&";|
* q/w5Dx|:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a(IE8:yU`
*/ LV9R ]
public void sort(int[] data) { <gX({FA
int[] temp=new int[data.length]; %gn@B2z
mergeSort(data,temp,0,data.length-1); VO1
} `[E-V
29 !QE>Q
private void mergeSort(int[] data, int[] temp, int l, int r) { CUTjRWQ
int i, j, k; .>,Y |
int mid = (l + r) / 2; 4D5Wse
if (l == r) 5WHqD!7u
return; $#%R_G]
if ((mid - l) >= THRESHOLD) \+Qd=,!i(
mergeSort(data, temp, l, mid); g_PP9S_?
else [V /f{y~{
insertSort(data, l, mid - l + 1); ^Rl?)_)1HE
if ((r - mid) > THRESHOLD) {B#w9>'b
mergeSort(data, temp, mid + 1, r); 731RqUR
else M-;MwLx
insertSort(data, mid + 1, r - mid); F@z%y'5 Z*
0 GFho$f
for (i = l; i <= mid; i++) { /Xc9}~t6
temp = data; g~|vmVBua
} &RuTq6)r
for (j = 1; j <= r - mid; j++) { ADxje%!1O
temp[r - j + 1] = data[j + mid]; cJ?,\@uuP
} EGFP$nvq
int a = temp[l]; US's`Ehx
int b = temp[r]; v:!TqfI
for (i = l, j = r, k = l; k <= r; k++) { a`9pHH:7Q
if (a < b) { d/+s-g p
data[k] = temp[i++]; *\+oe+3
a = temp; 9;n*u9<
} else { {[bpvK
data[k] = temp[j--]; %H_-`A`
b = temp[j]; Z9h4 pd
} WAuT`^"u
} 6]GHCyo
} $\k)Y(&
5D-as9k*
/** toj5b;+4F
* @param data $zhvI*0
* @param l 5Uhxl^c
* @param i }U9dzU14
*/ lHliMBSc
private void insertSort(int[] data, int start, int len) { |"b|Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b{<$OVc
} 5KTFf6Uq
} @yQ1F> t
} @qWClr{`
} -)&lsFF
>#;_Ebl@
堆排序： Cnc=GTRi
.4w"3>
package org.rut.util.algorithm.support; 5yJ~ q
+wHa)A0MW
import org.rut.util.algorithm.SortUtil; iYdg1
1o_Zw.
/** xudZ7
* @author treeroot pp#!sRUKPV
* @since 2006-2-2 )-iUUak
* @version 1.0 *ni0.
*/ :YLYCVi|
public class HeapSort implements SortUtil.Sort{ [H$kVQC
7bVKH[
/* (non-Javadoc) y+7+({w<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;<cCT!A
*/ OzH\YN
public void sort(int[] data) { ^4[QX -_2
MaxHeap h=new MaxHeap(); RN&8dsreZp
h.init(data); xvWP^Qkb
for(int i=0;i h.remove(); {q&`B
System.arraycopy(h.queue,1,data,0,data.length); 'Vhnio;qC
} c*(=Glzn
iP9Dr<P
private static class MaxHeap{ uc=u4@.>
ePSD#kY5
void init(int[] data){ ^g<Lu/5w
this.queue=new int[data.length+1]; f7%g=0.F
for(int i=0;i queue[++size]=data; wSALK)T1{
fixUp(size); :^x,>(a
} F"tM?V.|
} {=Py|N\\t
Vrp]YRL`
private int size=0; ~PN[ #e]
6Tq2WZ}<'
private int[] queue; xKT;1(Mk
sI4 FgO
public int get() { An BM*5G
return queue[1]; E*v+@rv
} |>Pv2
1bCS4fs^>
public void remove() { n*~#]%4
SortUtil.swap(queue,1,size--); 7=A @P
fixDown(1); Wx8cK=
} |c2;`T#`o
file://fixdown @d^MaXp_P
private void fixDown(int k) { On@p5YRwW
int j; xfqu=z8X
while ((j = k << 1) <= size) { \J6e/ G
if (j < size %26amp;%26amp; queue[j] j++; `ih#>i_&
if (queue[k]>queue[j]) file://不用交换 $K1)2WG
break; /\pUA!G)BD
SortUtil.swap(queue,j,k); s6oIj$
k = j; woU3WS0
} pTYV@5|
} 1n$
private void fixUp(int k) { +C4NhA2
while (k > 1) { oIKuo~
int j = k >> 1; ?&b"/sRS
if (queue[j]>queue[k]) KeC&a=HL
break; c+<gc:#jy
SortUtil.swap(queue,j,k); ("J_< p
k = j; DEenvS`,P
} g^k=z:n3,
} NB&zBJ#
j<vU[J+gx~
} y)`q% J&
35SL*zS@-
} bB.Yq3KI
[\"<=lb`
SortUtil： c=IjR3F
">R`S<W
package org.rut.util.algorithm; rGSi !q
w"h'rw
import org.rut.util.algorithm.support.BubbleSort; 8j@ADfZ9
import org.rut.util.algorithm.support.HeapSort; 6IL-S%EGK1
import org.rut.util.algorithm.support.ImprovedMergeSort; aDX4}`u
import org.rut.util.algorithm.support.ImprovedQuickSort; C2K<CDVw
import org.rut.util.algorithm.support.InsertSort; %VgK::)r
import org.rut.util.algorithm.support.MergeSort; `b[@GGv
import org.rut.util.algorithm.support.QuickSort; Hd~fSXFl
import org.rut.util.algorithm.support.SelectionSort; G)7J$4R
import org.rut.util.algorithm.support.ShellSort; `>{S?t<
a~`,zQ -@
/** 259:@bi!y
* @author treeroot wRE2rsXoU
* @since 2006-2-2 %lN4"jtx
* @version 1.0 unkA%x{W;
*/ 6NzS<
public class SortUtil { VI^~I;M^
public final static int INSERT = 1; q&EwD(k
public final static int BUBBLE = 2; ig:z[k?
public final static int SELECTION = 3; HAMps[D[
public final static int SHELL = 4; z_9qT"vF
public final static int QUICK = 5; <p8>"~R
public final static int IMPROVED_QUICK = 6; 8'mm<BV;sT
public final static int MERGE = 7; A-qpuI;f
public final static int IMPROVED_MERGE = 8; ;Q%3WD
public final static int HEAP = 9; '5SO3/{b
'lR f
public static void sort(int[] data) { ;i;;{j@$i
sort(data, IMPROVED_QUICK); IHf#P5y_
} K/XUF#^B]
private static String[] name={ #h7$b@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0'tm.,
}; k.w}}78N2N
4 {3< `
private static Sort[] impl=new Sort[]{ 08E,U
new InsertSort(), :vy./83W
new BubbleSort(), v`u>;S_
new SelectionSort(), =J&aN1Hgt
new ShellSort(), O7tL,)Vv
new QuickSort(), u:O6MO9^
new ImprovedQuickSort(), ffE>%M*
new MergeSort(), `_H^k!^
new ImprovedMergeSort(), TGQDt|+Z
new HeapSort() o[CjRQY]P
}; de?lO;8
@V# wYt
public static String toString(int algorithm){ z6Jfu:_N!
return name[algorithm-1]; {V9}W<
} /w*;|4~Bf
'P?DZE
public static void sort(int[] data, int algorithm) { w*s#=]6
impl[algorithm-1].sort(data); LC:bHM,e
} lEv<n6:_
K=C).5=U
public static interface Sort { az ?2
public void sort(int[] data); l<mEGKB#
} 8q&*tpE
= g)G!
public static void swap(int[] data, int i, int j) { (KxL*gB
int temp = data; kaj6C_k|
data = data[j]; "ZyWU f
data[j] = temp; -'!%\E;5
} F DCHB~D
} lhA<wV1-9G