[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; R3cG<MjmK
} $$/S8LmmK
int i1=l; 2O^32TdS
int i2=mid+1; I>8Bc
for(int cur=l;cur<=r;cur++){ ?/^VOj4&
if(i1==mid+1) C!I\Gh
data[cur]=temp[i2++]; `oan,wq+
else if(i2>r) [y$j9
data[cur]=temp[i1++]; =1_jaDp
else if(temp[i1] data[cur]=temp[i1++]; ),z,LU Yf
else 8*"rZh}'
data[cur]=temp[i2++]; r$Kh3EEF`E
} ],!pp3U
} gZ~y}@Ly
2GUhV*TN
} vatx+)
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改进后的归并排序: l!Nvn$hm
wN$uX#W|
package org.rut.util.algorithm.support; R2'C s
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import org.rut.util.algorithm.SortUtil; F'fM?!(
yFa&GxSq
/** >l6XZQ >
* @author treeroot &<m WA]cAL
* @since 2006-2-2 :s? y,
* @version 1.0 ((n5';|N
*/ T`j
public class ImprovedMergeSort implements SortUtil.Sort { >2*6qx>V
?m`R%>X"
private static final int THRESHOLD = 10; &Qz"nCvJ
48W:4B'l9
/* _zAc 5rS
* (non-Javadoc) Di]Iy
* >f3k3XWRT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -{.h\
*/ cC*zj\O
public void sort(int[] data) { \0xzBs1!
int[] temp=new int[data.length]; %Td+J`|U+
mergeSort(data,temp,0,data.length-1); 0R.Gjz*Q
} z2$FYn Q
FC|y'j 0
private void mergeSort(int[] data, int[] temp, int l, int r) { `1DU b7<
int i, j, k; W\zL
int mid = (l + r) / 2; 9p!dQx
if (l == r) $H %+k?
return; Au%Wrk3j
if ((mid - l) >= THRESHOLD) m mw)C"
mergeSort(data, temp, l, mid); t(Cq(.u`:
else \v B9fA:*
insertSort(data, l, mid - l + 1); \["1N-q b
if ((r - mid) > THRESHOLD) fte!Ll'
mergeSort(data, temp, mid + 1, r); \L&qfMjW"Z
else ZfF`kD\
insertSort(data, mid + 1, r - mid); rl_1),J\qG
+X4ttv
for (i = l; i <= mid; i++) { #0#V$AA>
temp = data; .oB'ttF1
} y$"~^8"z
for (j = 1; j <= r - mid; j++) { C:TuC5Sr
temp[r - j + 1] = data[j + mid]; jp\JwE
} oQKcGUZ
int a = temp[l]; [7CH(o1a&
int b = temp[r]; 7zi^{]
for (i = l, j = r, k = l; k <= r; k++) { s7X~OF(#
if (a < b) { K[Ws/yc^a
data[k] = temp[i++]; oc,U4+T
a = temp; (W{rv6cq
} else { j8F~j?%!
data[k] = temp[j--]; u/K)y:ZZ
b = temp[j]; BBZ)H6TzL
} cviN$oL
} '{1W)X
} ;FIMCJS
FlM.Du
/** ?`BED6$`G9
* @param data Yn?2,^?N
* @param l *+zy\AhkP
* @param i @/Wty@PU
*/ -6*OF.Ag`
private void insertSort(int[] data, int start, int len) { 8M5!5Jzv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U(=f5|-
} (&a3v
} \5v=pDd4g
} ({}O M=_
} !F}J+N=}
\3@2rW"5
堆排序： Z{|.xgsY
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package org.rut.util.algorithm.support; [0%Gu5_\
p'9 V._h
import org.rut.util.algorithm.SortUtil; @O*ev|o@x
8P'En+uE1|
/** FK/ro91L
* @author treeroot 9x 6ca
* @since 2006-2-2 Xk7$?8r4&
* @version 1.0 1&>nL`E[3
*/ ~6Ee=NaLzP
public class HeapSort implements SortUtil.Sort{ 2e D\_IW
S{r)/~/
/* (non-Javadoc) 9-e[S3ziM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (J?}eb;>n
*/ OD2ai]!v+
public void sort(int[] data) { ,nuDoc
MaxHeap h=new MaxHeap(); .\hib.n3
h.init(data); { <ao4w6B
for(int i=0;i h.remove(); "ZK5P&d
System.arraycopy(h.queue,1,data,0,data.length); *<h
} Wy0a2Ve
McMK|_H
private static class MaxHeap{ _<' kzOj
Vzv.e6_
void init(int[] data){ f%"_U'
this.queue=new int[data.length+1]; O7#}8-@}<u
for(int i=0;i queue[++size]=data; bQnwi?2
fixUp(size); th>yi)m
} ;V}FbWz^v6
} IbNTdg]/F`
,:Ix s^-
private int size=0; Cg%I)nz
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private int[] queue; wW)&Px n
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public int get() { IUBps0.T\
return queue[1]; r~BQy'
} a[{QlD^D
7>e~i,
public void remove() { Y=wP3q
SortUtil.swap(queue,1,size--); @_weMz8}
fixDown(1); yK2*~T,6@
} 7{/:,
file://fixdown rF j)5~
private void fixDown(int k) { '<E8<bi
int j; Xrzh*sp
while ((j = k << 1) <= size) { <)*g7
if (j < size %26amp;%26amp; queue[j] j++; Q`wA"mw6k
if (queue[k]>queue[j]) file://不用交换 C?c-V,
break; p?gLW/n
SortUtil.swap(queue,j,k); MBTt'6M
k = j; Exo`Z`m`U
} =[-- Hf
} 7g<`wLAH
private void fixUp(int k) { {XUfxNDf
while (k > 1) { J?=Ob?+ _
int j = k >> 1; pQ2)M8 gf
if (queue[j]>queue[k]) b42pLbpe'E
break; N?<@o2{
SortUtil.swap(queue,j,k); 8GAQVe^$-
k = j; 'C?f"P:X{
} 01d26`G$i~
} `?|]:7'<
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} ,Vn]Ft?n
m$UT4,Ol
} Q Fqv,B\<
})u}PQ
SortUtil： es(LE/`e
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package org.rut.util.algorithm; 0FR%<u
).`a-Pv
import org.rut.util.algorithm.support.BubbleSort; RxeRO2
import org.rut.util.algorithm.support.HeapSort; )A+j
import org.rut.util.algorithm.support.ImprovedMergeSort; s^X/ Om
import org.rut.util.algorithm.support.ImprovedQuickSort; DlkKQ
import org.rut.util.algorithm.support.InsertSort; .aH?H]^
import org.rut.util.algorithm.support.MergeSort; }Knq9cf
import org.rut.util.algorithm.support.QuickSort; (uxQBy
import org.rut.util.algorithm.support.SelectionSort; =y(YMWGS
import org.rut.util.algorithm.support.ShellSort; !'t2
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/** pnw4QQ9
* @author treeroot :XY3TI
* @since 2006-2-2 {%k;V ~
* @version 1.0 s3RyLT
*/ `1v!sSR0R
public class SortUtil { *R6eykp
public final static int INSERT = 1; _89G2)U=C
public final static int BUBBLE = 2; fQA)r
public final static int SELECTION = 3; i/EiUH/~
public final static int SHELL = 4; ik NFW*p
public final static int QUICK = 5; A,[m=9V
public final static int IMPROVED_QUICK = 6; RV*Zi\-X
public final static int MERGE = 7; PC7.+;1
public final static int IMPROVED_MERGE = 8; )Ua2x@j'C@
public final static int HEAP = 9; z4+6k-#):
p00Bgo
public static void sort(int[] data) { ]4~D;mv
sort(data, IMPROVED_QUICK); M!XFb
} _SW a3O#'
private static String[] name={ {:8[Mdf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $i] M6<Vxn
}; 1mPS)X_
VCtiZ4
private static Sort[] impl=new Sort[]{ tf79Gb>
new InsertSort(), fw};.M
new BubbleSort(), Donf9]&U
new SelectionSort(), qNVw+U;2P
new ShellSort(), uvM88#
new QuickSort(), `B0*/ml
new ImprovedQuickSort(), DL!s)5!M
new MergeSort(), Elk$9 <<
new ImprovedMergeSort(), VQx-gm8}!
new HeapSort() bUB6B
}; rAdcMFW
7B2Og{P
public static String toString(int algorithm){ iDxgAV f*
return name[algorithm-1]; .7rsbZzs
} GV[BpH
s'=]a-l~
public static void sort(int[] data, int algorithm) { .Vjpkt:H
impl[algorithm-1].sort(data); gbZX'D
} M8Lj*JN
P[oB'
public static interface Sort { DNO%J^
public void sort(int[] data); 6FFv+{2^@
} % 7:
bxHk0w
public static void swap(int[] data, int i, int j) { 2`eu3vA
int temp = data; 1vd+p!n
data = data[j]; ;9sVWJJCw
data[j] = temp; =#fvdj
} tR/ JY;jn
} ;BvWU\!