[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; 6|=j+rScv
} :zp`6l
int i1=l; "H+,E_&(
int i2=mid+1; .v])S}K
for(int cur=l;cur<=r;cur++){ _\zQ"y|G
if(i1==mid+1) PT_KXk
data[cur]=temp[i2++]; `W5-.Tv
else if(i2>r) h;M3yTM-
data[cur]=temp[i1++]; IeTdN_8
else if(temp[i1] data[cur]=temp[i1++]; jw>hk
else jk70u[\
data[cur]=temp[i2++]; nk@atK,38^
} C/@LZ OEL
} 77,oPLSn
eN>0wd5{L
} p,!$/Q+l
8OFj0S1r`
改进后的归并排序: \:_3i\2p
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package org.rut.util.algorithm.support; 1{PG>W
i*[n{=*l@
import org.rut.util.algorithm.SortUtil; < n?=|g
l*}FXL
/** dt,3"J
* @author treeroot &t}?2>:
* @since 2006-2-2 \~DM
* @version 1.0 gPXa>C
*/ 2U$"=:Cf
public class ImprovedMergeSort implements SortUtil.Sort { k&6I f0i
2}WDw>V
private static final int THRESHOLD = 10; {ERMGd6Jp
ZFn(x*L
/* 0Y+FRB]u
* (non-Javadoc) ${r[!0|
* PlxIfL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "&o,yd%
*/ 2xxB\J
public void sort(int[] data) { ;)hw%Z]Jj$
int[] temp=new int[data.length]; K~6e5D7.
mergeSort(data,temp,0,data.length-1); 3vic(^Qh
} F jrINxL7^
AR&:Q4r|
private void mergeSort(int[] data, int[] temp, int l, int r) { DSyXr~p8
int i, j, k; X_TiqV
int mid = (l + r) / 2; NC"yDWnO'
if (l == r) rpV1y$n<F
return; ?u$u?j|N
if ((mid - l) >= THRESHOLD) L'A)6^d@S
mergeSort(data, temp, l, mid); Y "jE'
else b]fzRdhl
insertSort(data, l, mid - l + 1); L36Yx7gT<
if ((r - mid) > THRESHOLD) [ !%R#+o=F
mergeSort(data, temp, mid + 1, r); u'5`[U -!
else 2Aq~D@,9=:
insertSort(data, mid + 1, r - mid); N/F$bv
h0|}TV^UJ
for (i = l; i <= mid; i++) { l* dV\ B
temp = data; vZAv_8S)
} O[q\e<V<
for (j = 1; j <= r - mid; j++) { VG@};dwbz*
temp[r - j + 1] = data[j + mid]; 6[P-Ny{z
} 6^F'|Wh
int a = temp[l]; kdrod[S
int b = temp[r]; U.oksD9v
for (i = l, j = r, k = l; k <= r; k++) { _t>"5s&i
if (a < b) { )}lRd#V
data[k] = temp[i++]; ^))RM_ic
a = temp; p<GR SJIk=
} else { !PUZWO
data[k] = temp[j--]; X&\d)/Y
b = temp[j]; kI\tqNJi
} J./d!an
} ~}9PuYaD@
} #2p#VQh
lFG9=Wf
/** Y%`SHe7M
* @param data 1T|$BK@)
* @param l 4`v!Z#e/aX
* @param i LDj<?'
*/ oOU1{[
private void insertSort(int[] data, int start, int len) { Pcd *">v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0~WF{_0|
} J5p8nmb
} &l2TeC@;
} .TB"eUy
} \_]En43mg
H=c`&N7E
堆排序： ;O#g"8
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package org.rut.util.algorithm.support; _S?qDG{E|
n> w`26MMp
import org.rut.util.algorithm.SortUtil; qa'gM@]
PR7f(NC
/** >4i>C
* @author treeroot 1}m3;
* @since 2006-2-2 IVvtX}
* @version 1.0 -yH,5vD
*/ UXr5aZ7y
public class HeapSort implements SortUtil.Sort{ S6i@"h5
}^ FulsC
/* (non-Javadoc) l$Gl'R>>*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QV|>4^1D
*/ 1+kE!2b;b
public void sort(int[] data) { C"uahP[Y
MaxHeap h=new MaxHeap(); Gs0H@
h.init(data); _'0 @%P%
for(int i=0;i h.remove(); X"asfA[6K
System.arraycopy(h.queue,1,data,0,data.length); },-*
} Tenf:Hm/k
q3e8#R)l
private static class MaxHeap{ }(FPV*mS
r`'y?Bra;
void init(int[] data){ R=)55qu
this.queue=new int[data.length+1]; wD\ZOn_J
for(int i=0;i queue[++size]=data; f>9s!Hpu_
fixUp(size); ??qq:`s
} k)\gWPH
} %CnxjtTo
OEhHR
private int size=0; W#w.h33)#6
Do7=#|bAM
private int[] queue; Vzlh+R>c
uBnoQ~Qd[z
public int get() { K!z`
return queue[1]; kQ>^->w
} AC%JC+
MHj,<|8Q
public void remove() { |pZUlQbb
SortUtil.swap(queue,1,size--); m"2d$vro"
fixDown(1); (K..k-o`.
} E)N<lh
file://fixdown 8AFczeg[[
private void fixDown(int k) { 3)Ac"nuyqH
int j; O~Wt600{E
while ((j = k << 1) <= size) { s Kicn5
if (j < size %26amp;%26amp; queue[j] j++; T Eu'*>g
if (queue[k]>queue[j]) file://不用交换 /1w2ehE<
break; :\ QUs}
SortUtil.swap(queue,j,k); ?*"srE,#JX
k = j; 4$6T+i2E
} is^pgKX
} b-5y9K
private void fixUp(int k) { s0u{dqP
while (k > 1) { F_3:bX
int j = k >> 1; AvJ,SQt
if (queue[j]>queue[k]) gN6rp(?y
break; X"MU3]
SortUtil.swap(queue,j,k); ->{d`-}m'
k = j; <W)u{KS#TY
} A=5epsB
} q%YV$$c
R,2P3lv1v@
} nR;D#"p%
Ddju~510
} 25y6a|`
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SortUtil： _Xcn N:Rt
`YBkF
package org.rut.util.algorithm; Y4.Eq+$gh
GwU?wIIj^
import org.rut.util.algorithm.support.BubbleSort; 9O*_L:4o
import org.rut.util.algorithm.support.HeapSort; 8|?LN8rp
import org.rut.util.algorithm.support.ImprovedMergeSort; &^&zR(o`
import org.rut.util.algorithm.support.ImprovedQuickSort; +UN<Zp7I/
import org.rut.util.algorithm.support.InsertSort; 24c ek
import org.rut.util.algorithm.support.MergeSort; Ey[On^$
import org.rut.util.algorithm.support.QuickSort; F/d7q%I
import org.rut.util.algorithm.support.SelectionSort; ~V=<3X
import org.rut.util.algorithm.support.ShellSort; B@YyQ'
#K\?E.9h
/** R<ND=[}s
* @author treeroot ^eYqll/U
* @since 2006-2-2 @F*wg
* @version 1.0 fl\aqtF
*/ J8a*s`ik
public class SortUtil { 'J)2g"T@
public final static int INSERT = 1; P,DC7\
public final static int BUBBLE = 2; BG&cQr
public final static int SELECTION = 3; <+j)P4O4
public final static int SHELL = 4; penlG36Q
public final static int QUICK = 5; [%A4]QzWh
public final static int IMPROVED_QUICK = 6; ?(6mVyIe
public final static int MERGE = 7; C#V ~Y
public final static int IMPROVED_MERGE = 8; /Dtd#OAdr
public final static int HEAP = 9; MTGiAFE
"L&'Fd@ZU
public static void sort(int[] data) { :wqC8&V
sort(data, IMPROVED_QUICK); F|bYWYED;
} ikBYd }5
private static String[] name={ G$zL)R8GE|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f$HH:^#
}; YZ$ZcfXDW
1k%k`[VC
private static Sort[] impl=new Sort[]{ 0yM[Z':i'{
new InsertSort(), bAk&~4Y_"
new BubbleSort(), C#;jYBtT7?
new SelectionSort(), b#)UUGmI
new ShellSort(), g?v\!/~(u
new QuickSort(), ?jQ](i&
new ImprovedQuickSort(), :p&!RI(l
new MergeSort(), W=B"Q qL
new ImprovedMergeSort(), AwUi+|7r])
new HeapSort() RZpcXv
}; <N,)G |&
DHC+C4
public static String toString(int algorithm){ f;SC{2f
return name[algorithm-1]; H1"q
} DciwQcG
hG~reVNf
public static void sort(int[] data, int algorithm) { @Y,7'0U
impl[algorithm-1].sort(data); hJz):d>Im
} dx*qb
YNrp}KQ
public static interface Sort { J/!cGr(B~
public void sort(int[] data); h_d+$W5
} ]'~vI/p
c)md
public static void swap(int[] data, int i, int j) { $/1c= Y@
int temp = data; f&,{XZ
data = data[j]; 60=m
data[j] = temp; >evS}O6
} l%R50aL
} x_!0.SU