[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; Chx+p&!
} vAqj4:j
int i1=l; \k{[HfVvn
int i2=mid+1; W8;!rFW
for(int cur=l;cur<=r;cur++){ G#^0Bh&
if(i1==mid+1) bSz7?NAp
data[cur]=temp[i2++]; VxARJ*4=Y
else if(i2>r) 5Dz$_2oM3
data[cur]=temp[i1++]; bS954d/
else if(temp[i1] data[cur]=temp[i1++]; "Aw)0a[j1
else '3WtpsKA
data[cur]=temp[i2++]; BMuEfa^
} +mzLOJed
} D}j`T
XoL DqN!
} QCE7VV1Rw
Xc}XRKiy{
改进后的归并排序: G -+!h4p
h:r?:C>n
package org.rut.util.algorithm.support; n+te5_F
rjO{B`sV*
import org.rut.util.algorithm.SortUtil; 8&| o
't0M+_J
/** X;Sb^c"j1
* @author treeroot N'R^gL
* @since 2006-2-2 #jW=K&;
* @version 1.0 ^\?Rh(pu
*/ ;l ZKgi8`
public class ImprovedMergeSort implements SortUtil.Sort { 5)eM0,:
$?bD55
private static final int THRESHOLD = 10; r~ 2*'zB
+>K&zS
/* Qz#By V:
* (non-Javadoc) VJ&<6
* 'wG1un;t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r9'[7b1l
*/ o5NmNOXm
public void sort(int[] data) { #?jsC)
int[] temp=new int[data.length]; d(d<@cB9
mergeSort(data,temp,0,data.length-1); MJ1qU}+]
} Ui`{U
%oTBh*K'o
private void mergeSort(int[] data, int[] temp, int l, int r) { P=jsOuW
int i, j, k; 'yq?xlIj
int mid = (l + r) / 2; 1BU97!
if (l == r) $5)#L$!,]
return; YZ4`b-
if ((mid - l) >= THRESHOLD) dX@ic,?
mergeSort(data, temp, l, mid); ]h(Iun
else PENB5+1OK
insertSort(data, l, mid - l + 1); GyN|beou
if ((r - mid) > THRESHOLD) ~1wt=Ln>
mergeSort(data, temp, mid + 1, r); {L%JDJ
else "5~?`5Ff
insertSort(data, mid + 1, r - mid); `@],J
PR:B6 F8
for (i = l; i <= mid; i++) { J'X}6Q
temp = data; r+E!V'{C
} O0L]xr
for (j = 1; j <= r - mid; j++) { vHcl7=)Q
temp[r - j + 1] = data[j + mid]; !6=;dX
} Jj>Rzj!m
int a = temp[l]; l!88|~
int b = temp[r]; K}re{y
for (i = l, j = r, k = l; k <= r; k++) { '`k7l7I[@
if (a < b) { =+MF@ 4
data[k] = temp[i++]; M1-tRF
a = temp; V=8db%^
} else { 8p%0d`sX
data[k] = temp[j--]; %QEBY>|lI
b = temp[j]; uD=Kar
} `~)?OTzU#
} 7wh4~
} it\$Pih]
oLKliA=q
/** D r(0w{5
* @param data g:Qq%'
* @param l L.'61ZU
* @param i uK" T~
*/ mc?IM(t
private void insertSort(int[] data, int start, int len) { HAK,z0/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gkuqe3
} 1*hEbO
} $TXiWW+
} !VWA4 e!+
} U|Fqna
)mm0PJF~q
堆排序： $uTrM8
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package org.rut.util.algorithm.support; Zo&i0%S\E
1(BLdP3&
import org.rut.util.algorithm.SortUtil; #G]IEO$M6
ik(YJw'i7E
/** ~@c<5 -`{
* @author treeroot .S54:vs
* @since 2006-2-2 C`;igg$t_
* @version 1.0 Bu=1-8@=qs
*/ #[=kQ&
public class HeapSort implements SortUtil.Sort{ ]?=87w
`qs,V
/* (non-Javadoc) L3Y,z3/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >1!u]R<3
*/ ulsU~WW7r
public void sort(int[] data) { p}!i_P
MaxHeap h=new MaxHeap(); f9u=h}
h.init(data); h-ii-c?R@0
for(int i=0;i h.remove(); sF!#*Y
System.arraycopy(h.queue,1,data,0,data.length); $XQgat@&]
} @lj|
\o[][R#D
private static class MaxHeap{ F@Sk=l(
95'+8*YCY
void init(int[] data){ 9Q,>I6`l
this.queue=new int[data.length+1]; nu\AEFT
for(int i=0;i queue[++size]=data; ]6Iu\,#J
fixUp(size); ~4~r
} t~ {O)tt
} (y]Z*p:EW
f1aZnl
private int size=0; gV.?Myy
5{b;wLi$X2
private int[] queue; 4q]6[/
."ZG0Zg
public int get() { Xsa8YP9
return queue[1]; 'EIe5Op
} +ytP5K7
m'}`+#C%)
public void remove() { } TUr96
SortUtil.swap(queue,1,size--); v)O0i2
fixDown(1); F6sQeU
} KE,.Evyu=
file://fixdown =i vlS
private void fixDown(int k) { cVx SO`jZw
int j; %mss{p!d6
while ((j = k << 1) <= size) { K*5gb^Ul
if (j < size %26amp;%26amp; queue[j] j++; a&JY x
if (queue[k]>queue[j]) file://不用交换 _0$>LWO~
break; Pi"?l[T0
SortUtil.swap(queue,j,k); 1_{e*=/y
k = j; b/[X8w'VP
} T`@brL
} czIEkm
private void fixUp(int k) { ng+sK
while (k > 1) { JfkEJk<
int j = k >> 1; 5xr>B7MRM?
if (queue[j]>queue[k]) TP#Ncqh
break; M 0}r)@
SortUtil.swap(queue,j,k); Pteti
k = j; qnyacI
} EXeV@kg
} 7Ku&Q<mi
Vp; `!+z"
} 0#Gm# =F
e~gNGr]L/
} EG^ rh;
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SortUtil： (t3gNin
:j~4mb?$
package org.rut.util.algorithm; %`pi*/(
=LIb0TZ2
import org.rut.util.algorithm.support.BubbleSort; 5-0&`,
import org.rut.util.algorithm.support.HeapSort; }>AA[ba"'
import org.rut.util.algorithm.support.ImprovedMergeSort; }U=}5`_]D
import org.rut.util.algorithm.support.ImprovedQuickSort; :I"22EH
import org.rut.util.algorithm.support.InsertSort; Ie!">8."
import org.rut.util.algorithm.support.MergeSort; tc.|mIvw
import org.rut.util.algorithm.support.QuickSort; R#Yj%$E1
import org.rut.util.algorithm.support.SelectionSort; #l+Rs3T:
import org.rut.util.algorithm.support.ShellSort; xX<T5Ls
"D>/#cY1/
/** id+EBVHAd
* @author treeroot d^54mfgI
* @since 2006-2-2 P//nYPyzg
* @version 1.0 vq9O|E3
*/ uj\&-9gEi
public class SortUtil { hFtjw6
public final static int INSERT = 1; ~x4]p|)</
public final static int BUBBLE = 2; 3&E@#I^],
public final static int SELECTION = 3; vMX\q
public final static int SHELL = 4; ^vVAuO
public final static int QUICK = 5; CD#U`jf
public final static int IMPROVED_QUICK = 6; FeZWS>N
public final static int MERGE = 7; ;D-k\kv
public final static int IMPROVED_MERGE = 8; ]X7_ji(l,
public final static int HEAP = 9; Jk`l{N
;){ZM,Ox
public static void sort(int[] data) { h)W#
sort(data, IMPROVED_QUICK); fTX|vy<EMI
} )BaGY
private static String[] name={ s/>0gu]A8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dpge:Qhr
}; Yc)Dx3
Z3Ww@&bU
private static Sort[] impl=new Sort[]{ T8*;?j*@
new InsertSort(), 9P#kV@%(0c
new BubbleSort(), e8_EB/)_Z
new SelectionSort(), |z@AvS[
new ShellSort(), EN}4-P/5
new QuickSort(), j+lcj&V#
new ImprovedQuickSort(), RMs8aZCa
new MergeSort(), 3T 0'zJ2f
new ImprovedMergeSort(), V!@6Nv
new HeapSort() DV({! [EP
}; s nNd7v.U6
PF)s>
public static String toString(int algorithm){ DbR!s1ux
return name[algorithm-1]; l]
} j@UE#I|h
bVZAf
public static void sort(int[] data, int algorithm) { Nd;pkssd
impl[algorithm-1].sort(data); E3CwA8)k
} 5lwMc0{/3
6pQo_l}
public static interface Sort { GbkDs-
public void sort(int[] data); 9A`^(
} cp`ZeLz2^
v(uNqX.BC
public static void swap(int[] data, int i, int j) { Z#kB+.U
int temp = data; ( pCU:'"
data = data[j]; [*H h6
data[j] = temp; Cs vwc%
} fNrpYR X
} @RdNAP_6