[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; y.Z?LCd<
} } GiHjzsR
int i1=l; r4#o+qE
int i2=mid+1; Ggb5K8D*
for(int cur=l;cur<=r;cur++){ <=,6p>Eo[
if(i1==mid+1) -uy`!A
data[cur]=temp[i2++]; pf7it5
else if(i2>r) [#sz WNfU
data[cur]=temp[i1++]; L~KM=[cn
else if(temp[i1] data[cur]=temp[i1++]; d0,s"K7@
else ~JH:EB:
data[cur]=temp[i2++]; _hk.2FV:3m
} T'b_W,m~,u
} =*LS%WI
Y(d$
} $O5UyKI
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改进后的归并排序: s S7c!
vZBc!AW
package org.rut.util.algorithm.support; E^SH\5B
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import org.rut.util.algorithm.SortUtil; /ID?DtJ
|*0<M(YXN
/** Ho *AAg
* @author treeroot f-71~
* @since 2006-2-2 x UD-iSY
* @version 1.0 qZA).12qS
*/ 9,"L^W8"k
public class ImprovedMergeSort implements SortUtil.Sort { ,11H.E Z
*C:|X b<9
private static final int THRESHOLD = 10; +PuPO9jKO@
#&7}-"Nd
/* 2m2;t0
* (non-Javadoc) TG5XSy
* P->y_4O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]:~OG@(
*/ o+$7'+y1n-
public void sort(int[] data) { Ht4;5?/y
int[] temp=new int[data.length]; 'u1?tQ=gmk
mergeSort(data,temp,0,data.length-1); Ez-[ )44/
} 2]ape !(
yT,.z 0
private void mergeSort(int[] data, int[] temp, int l, int r) { ok4@N @
int i, j, k; 1{r)L{]
int mid = (l + r) / 2; }7.PH'.8
if (l == r) ;y2/-tL?
return; d:U9pC$
if ((mid - l) >= THRESHOLD) [`):s= FC
mergeSort(data, temp, l, mid); #gcF"L||
else =Yt R`
insertSort(data, l, mid - l + 1); #*(td<Cp
if ((r - mid) > THRESHOLD) aqc?pqM
mergeSort(data, temp, mid + 1, r); $+I;oHWI
else $"H{4x`-
insertSort(data, mid + 1, r - mid); E0?iXSJ
])!o5`ltZ
for (i = l; i <= mid; i++) { a0ObBe'
temp = data; ;{"+g)u
} 81i655!Z
for (j = 1; j <= r - mid; j++) { =HlQ36;*
temp[r - j + 1] = data[j + mid]; X]dwX%:Z!j
} !f+H,]D"
int a = temp[l]; 9amaL~m
int b = temp[r]; C-H@8p?T
for (i = l, j = r, k = l; k <= r; k++) { `u&Zrdr,
if (a < b) { gjAIEI
data[k] = temp[i++]; F;<xnC{[
a = temp; /Dj=iBO
} else { W!>.$4Q9
data[k] = temp[j--]; k|H:
b = temp[j]; /Bm( `T
} #Q`dku%V:
} >b{q.
} %eO0wa$a
]3l9:|
/** k>g_Z`%<
* @param data !GNBDRr
* @param l EG=Sl~~o
* @param i H,u<|UMM_
*/ eF3,2DDC
private void insertSort(int[] data, int start, int len) { AQ[GO6$,%H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C .~+*"Vw
} ^i} L-QR
} yLQ*"sw\
} x-?Sn' m
} Cy=Hy@C
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堆排序： &?yZv{
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package org.rut.util.algorithm.support; ~15N7=wCM
z3;*Em8Ir
import org.rut.util.algorithm.SortUtil; _zwG\I|Q
&H`jL4S
/** *5^Q7``
* @author treeroot "*srx]
* @since 2006-2-2 x}"uZ$g
* @version 1.0 vz7J-CH
*/ c:o]d)S
public class HeapSort implements SortUtil.Sort{ = < oBgD0k
RpD=]y!5_
/* (non-Javadoc) T"DlT/\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5jgR4a*_v
*/ VYk!k3qS
public void sort(int[] data) { jGpN,/VQa
MaxHeap h=new MaxHeap(); U_n9]Z
h.init(data); .jk@IL
for(int i=0;i h.remove(); 9#MBaO8_"
System.arraycopy(h.queue,1,data,0,data.length); zZ` _D|<m
} 9|gr0&#~j
2h1vVF3
private static class MaxHeap{ t_$2CRG#
"C{}Z
void init(int[] data){ .xm.DRk3
this.queue=new int[data.length+1]; vRHd&0
for(int i=0;i queue[++size]=data; xk5@d6Y{r
fixUp(size); HV{wI1
} m0;CH/D0
} P;ci9vk
+ |#O@k
private int size=0; t7j);W%e6
+oovx2r&
private int[] queue; ~^r29'3
=06gj)8
public int get() { UVd7 JGR
return queue[1]; U<_3^
} =pS5uR~
fj;y}t1E]
public void remove() { V`XNDNJ:
SortUtil.swap(queue,1,size--); @W[f1
fixDown(1); uP~@U"!
} Vt".%d/`7
file://fixdown +~mA}psr
private void fixDown(int k) { ~l]ve,W[
int j; {pnS Q
while ((j = k << 1) <= size) { 3@M|m<_R$
if (j < size %26amp;%26amp; queue[j] j++; I uMQ9&
if (queue[k]>queue[j]) file://不用交换 Tk:h@F|B.|
break; =,_ +0M9
SortUtil.swap(queue,j,k); LIvFx|
k = j; H1QJk_RL
} ?&63#B,iZ
} /tf5Bv'<
private void fixUp(int k) { !O:y@
while (k > 1) { y}My.c
int j = k >> 1; w1OI4C)~
if (queue[j]>queue[k]) )GM41t1i
break; CsoiyY -2
SortUtil.swap(queue,j,k); i*Sqda $
k = j; S~;4*7+?:
} 1^7hf;|#g
} :7!0OVQla\
Z7hgA-t
} 7b;I+q
$m].8?
} HUv/ ~^<
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SortUtil： i]6`LqlO
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package org.rut.util.algorithm; '%dfzK*Z
x,|hU@h
import org.rut.util.algorithm.support.BubbleSort; V C24sU
import org.rut.util.algorithm.support.HeapSort; 'E/^8md>
import org.rut.util.algorithm.support.ImprovedMergeSort; ifUGY[L
import org.rut.util.algorithm.support.ImprovedQuickSort; Z{ X|6.
import org.rut.util.algorithm.support.InsertSort; jB$IyQ;@
import org.rut.util.algorithm.support.MergeSort; %S*{9hm/
import org.rut.util.algorithm.support.QuickSort; <UV1!2nv*
import org.rut.util.algorithm.support.SelectionSort; E[@ u 3i8
import org.rut.util.algorithm.support.ShellSort; $RIecv<e_
rvbLyv;~
/** )4<__|52"1
* @author treeroot W&&;:Fr
* @since 2006-2-2 vd 0ljA
* @version 1.0 YaKeq5%y
*/ TgmnG/Z
public class SortUtil { ;CmS ~K:
public final static int INSERT = 1; Y2ZT.l
public final static int BUBBLE = 2; F`Q[6"<a
public final static int SELECTION = 3; uW@oyZUj
public final static int SHELL = 4; r? NznNVU
public final static int QUICK = 5; =|3ek
public final static int IMPROVED_QUICK = 6; T92UeG
public final static int MERGE = 7; GqaDL3Niqs
public final static int IMPROVED_MERGE = 8; 7=TF.TW)
public final static int HEAP = 9; v/68*,z[
j53*E )d
public static void sort(int[] data) { h_:C+)13`x
sort(data, IMPROVED_QUICK); njScz"L~
} Q<^Tl(`/N?
private static String[] name={ nrxo&9[@n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `\gnl'
}; E*V`":efS
TZ(cu>
private static Sort[] impl=new Sort[]{ G-xDN59K
new InsertSort(), P"y`A}Bx
new BubbleSort(), / ';0H_
new SelectionSort(), juka0/
new ShellSort(), OjJXysslXO
new QuickSort(), h|VeG3H
new ImprovedQuickSort(), <lw` 3aa(
new MergeSort(), j9?}j#@
new ImprovedMergeSort(), EQb7-vhg
new HeapSort() 3DiLk=\~
}; dJ2Hr;Lc
>/kcdWl
public static String toString(int algorithm){ FbaEB RM
return name[algorithm-1]; }=gx#
} ryW'Z{+r'
Rot@x r7Hc
public static void sort(int[] data, int algorithm) { kP#B5K_U|
impl[algorithm-1].sort(data); h]+C.Eqnt#
} ewa wL"
-(bXSBs#
public static interface Sort { 7'Zky2F
public void sort(int[] data); KIui(n#/
} =XucOli6
yj;sSRT
public static void swap(int[] data, int i, int j) { kzn5M&f>
int temp = data; Vr6@>@SC
data = data[j]; e+$p9k~
data[j] = temp; +$C4\$t
} 8jd;JPz@\
} P `}zlml