[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; UBwYwm0
} k3 '5Ei
int i1=l; Mv%B#J
int i2=mid+1; [eF|2:
for(int cur=l;cur<=r;cur++){ 48GaZ@v
if(i1==mid+1) R;/LB^X]
data[cur]=temp[i2++]; 6>d3*
else if(i2>r) HRd02tah
data[cur]=temp[i1++]; S@L%X<Vm
else if(temp[i1] data[cur]=temp[i1++]; 7z&^i-l.
else C5^N)-]"
data[cur]=temp[i2++]; /X\:3P
} d/?0xLW
} '(:R-u!pp
KC\W6|NtGj
} B<!wh
Gm\jboef]
改进后的归并排序: ^F"eHUg
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package org.rut.util.algorithm.support; >F!X'#Iv
na/,1iI<
import org.rut.util.algorithm.SortUtil; XOY\NMo
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/** j62oA$z
* @author treeroot 6;\Tps;A
* @since 2006-2-2 Of$gs-
* @version 1.0 H,1Iz@W1
*/ Uv3Fe%>
public class ImprovedMergeSort implements SortUtil.Sort { 1w?DSHe
]n|lHZR
private static final int THRESHOLD = 10; <C7/b#4>\
x8h=3e$
/* ]FO)U
* (non-Javadoc) MW.,}f
* u&Y1,:hiL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )RwO2H
*/ q}7(w$&
public void sort(int[] data) { R 9Yk9v
int[] temp=new int[data.length]; Zv1/J}+
mergeSort(data,temp,0,data.length-1); Ds%~J
} m[*y9A1
cX-)]D
private void mergeSort(int[] data, int[] temp, int l, int r) { AQz&u
int i, j, k; t.m C q4{
int mid = (l + r) / 2; q"^T}d d,
if (l == r) q0]Z` <w
return; QW"BGg~6c
if ((mid - l) >= THRESHOLD) /H[!v:U
mergeSort(data, temp, l, mid); EY 9N{
else EPwM+#|e-
insertSort(data, l, mid - l + 1); 8Ow0A
if ((r - mid) > THRESHOLD) ~f>km|Q{u
mergeSort(data, temp, mid + 1, r); HvVS<Ke
else ns[Q %_
insertSort(data, mid + 1, r - mid); 6P*2Kg`
oT27BK26?h
for (i = l; i <= mid; i++) { 8a4&}^|
temp = data; \?.Tq24
} u~a@:D/F{G
for (j = 1; j <= r - mid; j++) { q!zsGf{
temp[r - j + 1] = data[j + mid]; 0FD+iID
} LK[%}2me
int a = temp[l]; Syj7K*,%bZ
int b = temp[r]; oVSq#I4
for (i = l, j = r, k = l; k <= r; k++) { x,SzZ)l-9
if (a < b) { HNtl>H
data[k] = temp[i++]; #<|q4a{8
a = temp; P*;zDQy
} else { wmr8[n&c
data[k] = temp[j--]; h .$3jNU
b = temp[j]; (GdL(H#IL
} |YAnd=$
} OjiQBsgnj
} pP6pn~}
(7g1eEK%
/** \;G97o
* @param data qrmJJSJ
* @param l |F 18j9
* @param i a_0G4@=T
*/ ;tF7GjEp
private void insertSort(int[] data, int start, int len) { t~0}Emgp<(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !mX 2
} 5'Fh_TXTD
} $fE$j {
} E}$K&<J'-
} $iA`_H`W
x-_!I>l&
堆排序： sc! e$@U
b)A$lP%`
package org.rut.util.algorithm.support; 0r+%5}|-K
f&S,l3H<
import org.rut.util.algorithm.SortUtil; hD>O LoO
F:CqB|
/** R9->.eE
* @author treeroot UEJX0=
* @since 2006-2-2 av1*i3
* @version 1.0 @,-xaZ[
*/ Iky'x[p,D
public class HeapSort implements SortUtil.Sort{ hNV"{V3`{
^6~CA
/* (non-Javadoc) +x!V;H(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `bGAc&,&
*/ ) tGC&l+?/
public void sort(int[] data) { otXB:a
MaxHeap h=new MaxHeap(); 7K`A2
h.init(data); rBP!RSl1
for(int i=0;i h.remove(); R4"g? e
System.arraycopy(h.queue,1,data,0,data.length); eD*"#O)W
} (d[)U<
%cD7}o:u
private static class MaxHeap{ {O6f1LuH
zb}:wUR
void init(int[] data){ $+sNjwv^F
this.queue=new int[data.length+1]; b0i]T?#
for(int i=0;i queue[++size]=data; NwmO[pt+
fixUp(size); H;<hmbN?d
} <BQ4x.[
} v.+-)RLQg
.h^."+TJ
private int size=0; 3_IuK6K2
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private int[] queue; /r|^Dc Nx
4ow)vS(
public int get() { im_W0tGvF
return queue[1]; 16o3ER
} "j9,3yJT
QhK]>d.
public void remove() { "7RQrz
SortUtil.swap(queue,1,size--); C}+w<
fixDown(1); r9G<HKl
} u(?
file://fixdown .8CR \-
private void fixDown(int k) { Tc@r#!.m
int j; 0?ZJJdI3
while ((j = k << 1) <= size) { -ny[Lh^b
if (j < size %26amp;%26amp; queue[j] j++; ]]+wDhxH
if (queue[k]>queue[j]) file://不用交换 [[?:,6I
break; 8|?$KLz?F>
SortUtil.swap(queue,j,k); OGrVy=rd
k = j; &-9wUZ
} .8l\;/o|
} 4_`+&
private void fixUp(int k) { DPi%[CRH
while (k > 1) { `Bnp/9q5
int j = k >> 1; H(!)]dO
if (queue[j]>queue[k]) N>7INK
break; :=^JHE{
SortUtil.swap(queue,j,k); 6.2_UN^<
k = j; 1,Uv;s;{
} S[{#AX=0
} d$kGYMT"
+%8c8]2
} :sFP{rFx~
4)-LlYS_d<
} S?*v p=
91r#lDR
SortUtil： xRJv_=dT
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package org.rut.util.algorithm; _UYt
h2!We#
import org.rut.util.algorithm.support.BubbleSort; )wo'i]#2:
import org.rut.util.algorithm.support.HeapSort; }f<.07
import org.rut.util.algorithm.support.ImprovedMergeSort; IBC P6[
import org.rut.util.algorithm.support.ImprovedQuickSort; ?z171X0
import org.rut.util.algorithm.support.InsertSort; & p"ks8"
import org.rut.util.algorithm.support.MergeSort; ]k_@F6 A
import org.rut.util.algorithm.support.QuickSort; E:f0NV3"1
import org.rut.util.algorithm.support.SelectionSort; {$HW_\w
import org.rut.util.algorithm.support.ShellSort; oJUVW"X6
<jQ?l%\
/** +%=Ao6/#
* @author treeroot *]p]mzc
* @since 2006-2-2 # h]m8
* @version 1.0 { o=4(RC
*/ k;R*mg*K
public class SortUtil { lKrD.iYt8
public final static int INSERT = 1; pV(b>O
public final static int BUBBLE = 2; d3+pS\&IX?
public final static int SELECTION = 3; [P]zdw w#
public final static int SHELL = 4; :O{`!&[>L
public final static int QUICK = 5; Y{B|*[xM
public final static int IMPROVED_QUICK = 6; .%h.b6^
public final static int MERGE = 7; T/V8&'^i
public final static int IMPROVED_MERGE = 8; Rgw\qOb
public final static int HEAP = 9; 5u MP31
G@oY2sM"
public static void sort(int[] data) { /-b)`%Q|Y
sort(data, IMPROVED_QUICK); WQ<J<$$uu
} j08}5Eo
private static String[] name={ KcglpKV`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KtUI(*$`
}; Pk7Yq:avL
q%w\UAqA
private static Sort[] impl=new Sort[]{ S "R]i
new InsertSort(), }xn\.M:ic
new BubbleSort(), P&V,x`<Z
new SelectionSort(), Pdmfn8I]%
new ShellSort(), rJ4O_a5/
new QuickSort(), TggM/@k
new ImprovedQuickSort(), Lo\+T+n
new MergeSort(), 2K'3ry)[y
new ImprovedMergeSort(), ,OsFv}v7
new HeapSort() X#j-Ld{j
}; yjaX\Wb[z[
3xWeN#T0
public static String toString(int algorithm){ F=U3o=-:
return name[algorithm-1]; 'due'|#^
} a?/GEfd
oJ\UF S
public static void sort(int[] data, int algorithm) { v=EV5#A
impl[algorithm-1].sort(data); nR-`;lrF~
} +pZ, RW.D
m{ .'55
public static interface Sort { ~^cx a%
public void sort(int[] data); eEePK~%c
} oA%8k51>~K
vyP3]+n
public static void swap(int[] data, int i, int j) { 6e3s |
int temp = data; yT%"<m6Y*\
data = data[j]; LFvKF.
data[j] = temp; k3h,c;
} NBuibL
} Fq>=0 )