[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; g+QIhur
} `_ M+=*}
int i1=l; 4oryTckS
int i2=mid+1; Iw( wT_
for(int cur=l;cur<=r;cur++){ 9kqR-T|Q
if(i1==mid+1) fZsw+PSy
data[cur]=temp[i2++]; OK`^DIr5l
else if(i2>r) PvjZoF["
data[cur]=temp[i1++]; `U\l: ~]e
else if(temp[i1] data[cur]=temp[i1++]; UGgo;e
else KC2Z@
data[cur]=temp[i2++]; 8f)pf$v`
} fi~@J`
} p W5D!z
A:z
} }|[0FP]v
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改进后的归并排序: #Hu##x|
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package org.rut.util.algorithm.support; ;1nXJ{jKw
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import org.rut.util.algorithm.SortUtil; iCh8e>+
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/** 7,Z<PE
* @author treeroot gV\Y>y4v
* @since 2006-2-2 ZfVY:U:o>
* @version 1.0 6|3 X*Orn
*/ ohJDu{V
public class ImprovedMergeSort implements SortUtil.Sort { M}CxCEdDB]
!Yn#3c
private static final int THRESHOLD = 10; 6w m-uu
D/4]r@M2c
/* Q2woCxB
* (non-Javadoc) Lpkx$QZ
* $XMpC{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a$^)~2U{
*/ Pw7uxN`
public void sort(int[] data) { 2Kr>93O
int[] temp=new int[data.length]; }opMf6`w
mergeSort(data,temp,0,data.length-1); 1|H4]!7kE
} >py[g0J
|#yT]0L%pA
private void mergeSort(int[] data, int[] temp, int l, int r) { }-XZ1qr
int i, j, k; cwtlOg
int mid = (l + r) / 2; (0`w.n
if (l == r) B|$o.$5
return; vRf$#fBEQ
if ((mid - l) >= THRESHOLD) 7w8UnPuM
mergeSort(data, temp, l, mid); uW#s;1H.)
else hm0A%Js
insertSort(data, l, mid - l + 1); I} +up,B]o
if ((r - mid) > THRESHOLD) YTY(Et1i
mergeSort(data, temp, mid + 1, r); y3QS!3I
else !io1~GpKS
insertSort(data, mid + 1, r - mid); ;C:|m7|
59W~bWHCP
for (i = l; i <= mid; i++) { t#y,9>6
temp = data; 6Bcr.`
} 1n7'\esC*
for (j = 1; j <= r - mid; j++) { $G }9iV7
temp[r - j + 1] = data[j + mid]; h#Z,ud_
} }m5()@Q}a
int a = temp[l]; P{_%p<:V
int b = temp[r]; M3F1O6=4j
for (i = l, j = r, k = l; k <= r; k++) { K[/L!.Ag
if (a < b) { :?FHqfN?_
data[k] = temp[i++]; W ;+()vC
a = temp; /]-yZ0hX0O
} else { :Mh\;e
data[k] = temp[j--]; /cUu]#h
b = temp[j]; +_bxza(ma{
} UHU ,zgM
} aot2F60J,
} @V5i
(&r` l&0
/** [UC_
* @param data WQiRbbX
* @param l 5/h-Hr
* @param i T{`VUS/
*/ j;z7T;!i
private void insertSort(int[] data, int start, int len) { OW@)6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FeO1%#2<y
} (#O"
} Vky]In=
} -Eq[J k
} mEi(DW)(
Qy[S~D_
堆排序： =&9c5"V&
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package org.rut.util.algorithm.support; <%m1+%mA.
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import org.rut.util.algorithm.SortUtil; R4JfH
ElDeXLr'
/** j&Xx{ 4v
* @author treeroot U:3OE97
* @since 2006-2-2 33D2^Sf6"
* @version 1.0 =mPe wx'
*/ %eIaH!x:
public class HeapSort implements SortUtil.Sort{ wF%RM$
Y3(MKq
/* (non-Javadoc) w4}Q6_0v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mf{M-(6'
*/ SDE$ymPx
public void sort(int[] data) { GRkN0|ovfj
MaxHeap h=new MaxHeap(); |>'N^
h.init(data); "p|.[d
for(int i=0;i h.remove(); UA2KY}pz5
System.arraycopy(h.queue,1,data,0,data.length); 5~jz| T}s
} U] GD6q
4pQf*l8e
private static class MaxHeap{ j|&D(]W/
IpSWg
void init(int[] data){ YwF&-~mp7n
this.queue=new int[data.length+1]; yZ)9Hd
for(int i=0;i queue[++size]=data; aT}Hc5L,b
fixUp(size); !vpXXI4
} Cj`~ntMN
} +WMXd.iN,
!QbuOvw
private int size=0; 8HJ,6Lr;
U.I w/T-5
private int[] queue; vyJ8" #]qY
G8%VL^;O*5
public int get() { qhcx\eD:?
return queue[1]; |&W4Dkn
} _#&oQFdYR
hxM{}}.E
public void remove() { b)e;Q5Z(.
SortUtil.swap(queue,1,size--); _kMHF
fixDown(1); YVgH[-`,
} 5XB]p|YU~s
file://fixdown d4^x,hzV
private void fixDown(int k) { =7H\llL4BC
int j; _&9P&Zf4
while ((j = k << 1) <= size) { [TUs^%2@
if (j < size %26amp;%26amp; queue[j] j++; <;?1#ok
if (queue[k]>queue[j]) file://不用交换 39 zfbxX
break; U!uJ)mm
SortUtil.swap(queue,j,k); ISFNP&&K
k = j; esBv,b?*
} !u8IZpf
} Eri007?D
private void fixUp(int k) { $%"hhju
while (k > 1) { N"G\H<n
int j = k >> 1; r63l(
if (queue[j]>queue[k]) fpC":EX@r
break; z[<Na3]
SortUtil.swap(queue,j,k); Bt,'g*Cs
k = j; s5mJ -
} 3F!)7
} lMu-,Z="
,tg]Gt
} $MwBt
fmQif]J;;
} H?Q--pG8
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SortUtil： !z4I-a
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package org.rut.util.algorithm; zx2`0%Q
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import org.rut.util.algorithm.support.BubbleSort; 7.ein:M|CB
import org.rut.util.algorithm.support.HeapSort; V59!}kel1%
import org.rut.util.algorithm.support.ImprovedMergeSort; Db*b"/]
import org.rut.util.algorithm.support.ImprovedQuickSort; U!c+i#:t
import org.rut.util.algorithm.support.InsertSort; A- Abj'
import org.rut.util.algorithm.support.MergeSort; R13k2jLSQ
import org.rut.util.algorithm.support.QuickSort; JeNX5bXW
import org.rut.util.algorithm.support.SelectionSort; % 33O)<?
import org.rut.util.algorithm.support.ShellSort; wL3RcXW``e
G/#<d-}_
/** [f lK
* @author treeroot $/g`{OI]K
* @since 2006-2-2 a.gMH uL
* @version 1.0 U>.5vK.+
*/ >]gB@tn[
public class SortUtil { LiQH!yHW
public final static int INSERT = 1; uM\\(g}
public final static int BUBBLE = 2; LA59O@r
public final static int SELECTION = 3; cl]W]^q-Cx
public final static int SHELL = 4; %r.C9
public final static int QUICK = 5; |;)_-=L0P
public final static int IMPROVED_QUICK = 6; >yn]h4M
public final static int MERGE = 7; id : ^|
public final static int IMPROVED_MERGE = 8; 4~$U#$u_
public final static int HEAP = 9; ~J+ qIZge
e],(d7Jo
public static void sort(int[] data) { RfD#/G3|
sort(data, IMPROVED_QUICK); t g-(e=S4P
} DBcR1c&<H
private static String[] name={ =LK`mNA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u1u;aG
}; q5EkAh<PD|
.*oL@iX
private static Sort[] impl=new Sort[]{ ts@$*
new InsertSort(), 8,RqhT)2#
new BubbleSort(), Ax~ i`
new SelectionSort(), 0]' 2i
new ShellSort(), 8$47Y2r@
new QuickSort(), piIzff
new ImprovedQuickSort(), L&:A59)1k
new MergeSort(), Vraz}JV
new ImprovedMergeSort(), nFGX2|d
new HeapSort() 4 Sk@ v
}; c1+z(NQ3
iiJT%Zq`#
public static String toString(int algorithm){ y $uq`FW
return name[algorithm-1]; l$c/!V[3
} iWr #H
/c-k{5mH%
public static void sort(int[] data, int algorithm) { +`Nu0y!rj
impl[algorithm-1].sort(data); <[}zw!z
} #<m2Xo?d]
G"u4]!$/
public static interface Sort { US9aW)8
public void sort(int[] data); t!J>853
} I/A%3i=H
g5Io=e@s
public static void swap(int[] data, int i, int j) { 3PRU
int temp = data; U*sQ5uq
data = data[j]; t4:/qy
data[j] = temp; 7zE1>.
} m zoH$@
} =X[?d/[