[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; lAP k/G
} SL-2^\R
int i1=l; XGR2L DR
int i2=mid+1; 3ai[ r
for(int cur=l;cur<=r;cur++){ N68$b#9Ry
if(i1==mid+1) u9OY Jo
data[cur]=temp[i2++]; 1vj@qw3
else if(i2>r) MmN{f~Kq9
data[cur]=temp[i1++]; @6>Q&GYqt
else if(temp[i1] data[cur]=temp[i1++]; qqf`z,u
else /DHgwpJ
data[cur]=temp[i2++]; rM,e$
} gHBvQ1g
} kk-<+R2
'NhQBk
} e=OHO,74z"
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改进后的归并排序: GHcx@||C?
ZyUcL_
package org.rut.util.algorithm.support; m7'<k1#"Y
:@[$:
import org.rut.util.algorithm.SortUtil; ~4{q
V2Vr7v=Y"
/** ~~OFymQ%?q
* @author treeroot Z)`)9]*
* @since 2006-2-2 OB(oOPH
* @version 1.0 \Mg_Q$
*/ @./h$]6
public class ImprovedMergeSort implements SortUtil.Sort { wc;n= %
kL*P 3 0
private static final int THRESHOLD = 10; S$.0goOW
+)sX8zb*gY
/* W\~^*ny P6
* (non-Javadoc) (?r,pAc:
* 90<g=B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *H QcI-
*/ ApCU|*r)
public void sort(int[] data) { 2IJK0w@
int[] temp=new int[data.length]; Y~I<Locv
mergeSort(data,temp,0,data.length-1); EnM
} rL{R=0
.T'@P7Hdx
private void mergeSort(int[] data, int[] temp, int l, int r) { ]c/E7|0Q
int i, j, k; ODxZO3
int mid = (l + r) / 2; !RI _Uph
if (l == r) jzbq{#
return; _? gCOr
if ((mid - l) >= THRESHOLD) ljKIxSvCFp
mergeSort(data, temp, l, mid); ;o9h|LRs
else Du+W7]yCl
insertSort(data, l, mid - l + 1); nq M7Is
if ((r - mid) > THRESHOLD) MVYd\)\o
mergeSort(data, temp, mid + 1, r); U] LDi8
else dJ"M#X!Zu
insertSort(data, mid + 1, r - mid); ``-N2U5
$v0,)ALi
for (i = l; i <= mid; i++) { yix[zfQt0
temp = data; +=3=%%?C
} q)k:pQ
for (j = 1; j <= r - mid; j++) { 3z8i0
temp[r - j + 1] = data[j + mid]; Qm%PpQ^Lz3
} N''QQBUD
int a = temp[l]; m@Z#
int b = temp[r]; OIcXelS:@k
for (i = l, j = r, k = l; k <= r; k++) { /WuYg OI
if (a < b) { IzP,)!EE
data[k] = temp[i++]; M-o'`e'
a = temp; y)G-6sZ/
} else { n#(pT3&
data[k] = temp[j--]; !jj`Ht)
b = temp[j]; [l23b{
} 2cMCZuO
} @5>#<LV=E#
} x)PW4{3qR
$^]K611w9
/** J&xZN8jW
* @param data ;*(-8R/
* @param l *1)>He$qL
* @param i i>m%hbAk
*/ PYkhY;*
private void insertSort(int[] data, int start, int len) { +9_Y0<C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S_ATsG*(
} zxyl+tU &
} )Qbd/zd\U
} )^j_O^T5
} G3.aw
">H*InF
堆排序： 5UEZpxnv
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package org.rut.util.algorithm.support; &,nv+>D
{EgSjxfmw
import org.rut.util.algorithm.SortUtil; eADCT
RTOA'|[0M
/** @Cj!MZ=T
* @author treeroot F? #3
* @since 2006-2-2 {;yO3];Hqw
* @version 1.0 QYH-"-)
*/ +}:Z9AAMy
public class HeapSort implements SortUtil.Sort{ 1NZ"\9=U
Y ;Ym=n'
/* (non-Javadoc) 5zl+M`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #ArrQeO 5_
*/ iU)I"#\l'k
public void sort(int[] data) { f|d~=\0y
MaxHeap h=new MaxHeap(); eaw!5]huu
h.init(data); xl}rdnf}
for(int i=0;i h.remove(); _7c3=f83
System.arraycopy(h.queue,1,data,0,data.length); Ymut]`dX
} =KE7NXu]-
[|]J8o@u^
private static class MaxHeap{ YI0 wr1N
RY-iFydPc
void init(int[] data){ -U|c~Cqc
this.queue=new int[data.length+1]; "HOZ2_(o
for(int i=0;i queue[++size]=data; 3smkY
fixUp(size); WogUILB
} u6|C3,!z"
} V DFgu
r%,?uim#
private int size=0; ]N>ZOV,>
}M07-qIX{
private int[] queue; s*uA3}j
N?\X2J1
public int get() { vhe Y F@
return queue[1]; is.t,&H4P]
} {oQs*`=l>
@|gG3
public void remove() { -&/?&{Q0
SortUtil.swap(queue,1,size--); x9lA';})
fixDown(1); Yh<F-WOo2
} P{Nvt/%
file://fixdown q"d9C)Md
private void fixDown(int k) { osp~)icun
int j; !I7$e&Uz@
while ((j = k << 1) <= size) { F`D$bE;|
if (j < size %26amp;%26amp; queue[j] j++; x ;DoQx
if (queue[k]>queue[j]) file://不用交换 O&Y;/$w
break; 4.9qB
SortUtil.swap(queue,j,k); [LVXXjkFI
k = j; '6N)sqTR
} t3L>@NWG
} ing'' _
private void fixUp(int k) { yR$_ZXsd
while (k > 1) { J=A)]YE
int j = k >> 1; @?B+|*cm
if (queue[j]>queue[k]) `d <`>
break; NaR} 0
SortUtil.swap(queue,j,k); d) -(C1f
k = j; tU4#7b:Y
} Ez1eGPVr
} ,%pCcM)
8h] TI_
} _c>iux;
^ :VH?I=
} >}SEU-7&\
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SortUtil： !vz'zy)7
LnR>!0:c
package org.rut.util.algorithm; (\:Rnl
1/$PxQ
import org.rut.util.algorithm.support.BubbleSort; V.B@@ ;
import org.rut.util.algorithm.support.HeapSort; VEps|d3,,
import org.rut.util.algorithm.support.ImprovedMergeSort; lZk z\
import org.rut.util.algorithm.support.ImprovedQuickSort; %A zy#m
import org.rut.util.algorithm.support.InsertSort; Ts!'>_<Je
import org.rut.util.algorithm.support.MergeSort; (~~m8VJ>
import org.rut.util.algorithm.support.QuickSort; n Bm ]?
import org.rut.util.algorithm.support.SelectionSort; 1l-5H7^w2?
import org.rut.util.algorithm.support.ShellSort; :1+Aj (
{!Qu(%
/** :8b'HhjM
* @author treeroot qT#e -.G
* @since 2006-2-2 &d6@SQ
* @version 1.0 ::Zo` vP
*/ ;yNc7Vl
public class SortUtil { l>6tEOXt
public final static int INSERT = 1; /
public final static int BUBBLE = 2; }UyQGRZ=
public final static int SELECTION = 3; 5>}$]d/o
public final static int SHELL = 4; .SC*!,
public final static int QUICK = 5; Lu#qo^
public final static int IMPROVED_QUICK = 6; oc1BOW z
public final static int MERGE = 7; qvn.uujYS
public final static int IMPROVED_MERGE = 8; GxdAOiq;
public final static int HEAP = 9; G+dq */
"L3mW=!*
public static void sort(int[] data) { ytttF5-
sort(data, IMPROVED_QUICK); Xs2}n^#i
} uj.i(Us
private static String[] name={ s#?ZwD,=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9c^,v_W@
}; 3aW<FSgP
Lt*P&
private static Sort[] impl=new Sort[]{ &=lc]sk
new InsertSort(), =:rg1wo"c
new BubbleSort(), @7 Ry{,A
new SelectionSort(), ACyK#5E
new ShellSort(), zYzV!s2^
new QuickSort(), %]+R>+
new ImprovedQuickSort(), 4!dc/K
new MergeSort(), Ge?Wmq>
new ImprovedMergeSort(), C8m9H8Qm
new HeapSort() Qx)b4~F?
}; R'Jrbe|
;e?M;-
public static String toString(int algorithm){ K1@Pt}
return name[algorithm-1]; A3eCI
} o=Vs)8W
.!3e$mhV
public static void sort(int[] data, int algorithm) { ZJ3g,dc
impl[algorithm-1].sort(data); bWTfP8gT
} =F+v+zP7P
V,-we|"
public static interface Sort { |N/d}
public void sort(int[] data); <K0epED
} !Se0&Ob
G^.N$wcv
public static void swap(int[] data, int i, int j) { JI>Y?1i0O
int temp = data; rqjq}L)
data = data[j]; D40 vCax^J
data[j] = temp; gH//@`6
} 81Z;hO"~
} R,3cJ Y_%