[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; H>gWxJ 5
} N]3-L`t
int i1=l; b(+w.R(+Ti
int i2=mid+1; zav*
for(int cur=l;cur<=r;cur++){ kKFuTem_3
if(i1==mid+1) ;m2"cL>{l
data[cur]=temp[i2++]; n"K {uj))
else if(i2>r) PV5TG39qQ
data[cur]=temp[i1++]; +ZD[[+
else if(temp[i1] data[cur]=temp[i1++]; F^/~@^{P
else H]T2$'U6
data[cur]=temp[i2++]; 4OqE.LFu
} 9RCB$Ka6X
} N3S,33 8s
)<H 91:.
} *SMoodFBS
s>9z+;~!
改进后的归并排序: J pCZq #
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package org.rut.util.algorithm.support; 7(nz<z p
Y_|K,T6Zj@
import org.rut.util.algorithm.SortUtil; B5?c'[V9
Jq$6$A,f
/** #J<`p
* @author treeroot !h`cXY~w
* @since 2006-2-2 2>_brz|7:|
* @version 1.0 p;c_<>ws-Y
*/ 7~%
public class ImprovedMergeSort implements SortUtil.Sort { r(?'Yy
Le#E! sU
private static final int THRESHOLD = 10; Jnu}{^~
3^iQe"P%a@
/* jl 30\M7
* (non-Javadoc) 5Xy^I^J
* f)ucC$1=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8KGv?^M 6W
*/ Ztpm_P6
public void sort(int[] data) { sg9x?Bx9
int[] temp=new int[data.length]; 2y .-4?e
mergeSort(data,temp,0,data.length-1); c?V*X-
} bdsHA2r`s
M~g~LhsF
private void mergeSort(int[] data, int[] temp, int l, int r) { V.P5v{
int i, j, k; wr;|\<c
int mid = (l + r) / 2; Mh-*5Rx
if (l == r) M#8Ao4 T
return; J:TI>*tn
if ((mid - l) >= THRESHOLD) >1)@n3.<O
mergeSort(data, temp, l, mid); ,$zSJzS
else e$xv[9
insertSort(data, l, mid - l + 1); 3Av(|<cR
if ((r - mid) > THRESHOLD) G+QNg.pH
mergeSort(data, temp, mid + 1, r); D=I5[t0c4
else ja,L)b:
insertSort(data, mid + 1, r - mid); Gad2EEZ%0
_.J[w6
for (i = l; i <= mid; i++) { ^?S@v1~7d
temp = data; ,ovv
} lj SR?:\
for (j = 1; j <= r - mid; j++) { g#KToOP
temp[r - j + 1] = data[j + mid]; r1az=$
} S1^Mw;?P
int a = temp[l]; f29HQhXqS
int b = temp[r]; M]/wei"X
for (i = l, j = r, k = l; k <= r; k++) { m 'H
if (a < b) { ]JCB^)tM
data[k] = temp[i++]; p7=^m>Z6
a = temp; :7PSZc:xE
} else { !=Kay^J~.
data[k] = temp[j--]; &+w!'LSaD
b = temp[j]; 3=L1HZH
} F~@1n,[
} Y*X6lo
} n)?F 9Wap
ALt";8Oa
/** PG~m-W+
* @param data ]H9HO2wGQ
* @param l wb Tg
* @param i @j8L{FGnN
*/ }d*sWSPu(
private void insertSort(int[] data, int start, int len) { uKAHJ$%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E|A_|FS&%
} T+{'W
} :IKp7BS
} z^GGJu%vjr
} l0bT_?LhK
5xV/&N
堆排序： Mn{Rg>X
g$+O<a@n
package org.rut.util.algorithm.support; qmeEUch`
E2/U']R
import org.rut.util.algorithm.SortUtil; #Q)w$WR
#7:9XID /
/** uRcuy/CY
* @author treeroot 3Eux-C!t
* @since 2006-2-2 RX|&cY>
* @version 1.0 ]CJ>iS!V
*/ J3JRWy@?P
public class HeapSort implements SortUtil.Sort{ Rl!WH%;c[X
}z2-|"H
/* (non-Javadoc) oDDH;Q"M(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Kc7@oO~
*/ 8l,hP.
public void sort(int[] data) { ",@g
MaxHeap h=new MaxHeap(); _4#psxl[M
h.init(data); #IJKMSGw?E
for(int i=0;i h.remove(); J)&+y;.
System.arraycopy(h.queue,1,data,0,data.length); vPq\reKe
} Mj;'vm7#'
-~aEqj#?
private static class MaxHeap{ @G{DOxE*
&otgN<H9
void init(int[] data){ bg. KkJMrR
this.queue=new int[data.length+1]; .F|WQ7Mu
for(int i=0;i queue[++size]=data; Hx0,kOh)
fixUp(size); VDN]P3
} t$5]1dY$X
} !{0!G
|hyr(7
private int size=0; Nr+1N83S}
k&;L(D
private int[] queue; "Jd1&FsCwX
![n`n(oN
public int get() { KO"iauW
return queue[1]; J#WPXE+Ds
} aN3{\^
aE$p;I
public void remove() { >>xV-1h:
SortUtil.swap(queue,1,size--); #XPU$=
fixDown(1); Agf!6kh
} /LzNr0>2
file://fixdown DF =.G1
private void fixDown(int k) { '>$A7
int j; gJ7puN
while ((j = k << 1) <= size) { xFnMXht
if (j < size %26amp;%26amp; queue[j] j++; ITiw) M
if (queue[k]>queue[j]) file://不用交换 d(XWt;KK
break; }@4*0_g"Aw
SortUtil.swap(queue,j,k); K.7gd1I
k = j; OR{"9)I
} 9-SXu lgu
} HOG7||&y
private void fixUp(int k) { Z;:-8 HPDY
while (k > 1) { aQ. \!&U
int j = k >> 1; 5. i;IOx
if (queue[j]>queue[k]) R4;6Oi)
break; w6 .HvH-@?
SortUtil.swap(queue,j,k); >MH@FnUL
k = j; j!rz@Y3
} +\Q@7Lj
} yAe}O#dy
/-lmfpT
} v\C+G[MV7
oJy/PR3
} FTe#@\I
$Izk]o;X~
SortUtil： ?1sY S
/_8V+@im
package org.rut.util.algorithm; '%N p9Iqt
:08UeEy
import org.rut.util.algorithm.support.BubbleSort; Pc<ZfO #
import org.rut.util.algorithm.support.HeapSort; lki(_@3
import org.rut.util.algorithm.support.ImprovedMergeSort; f63q
import org.rut.util.algorithm.support.ImprovedQuickSort; dWA7U6c<
import org.rut.util.algorithm.support.InsertSort; $fKWB5p|()
import org.rut.util.algorithm.support.MergeSort; QPnc "!
import org.rut.util.algorithm.support.QuickSort; |u[gI+TUE
import org.rut.util.algorithm.support.SelectionSort; |Z;Av%%
import org.rut.util.algorithm.support.ShellSort; #<{MtK_
y-YYDEl
/** 2bmppDk
* @author treeroot )XFMlSx)
* @since 2006-2-2 u CXd% CzE
* @version 1.0 ]@EjKgs
*/ qyto`n7
public class SortUtil { ^H'#*b0u
public final static int INSERT = 1; S1."2AxO
public final static int BUBBLE = 2; w jF\>
public final static int SELECTION = 3; Kmtr.]Nj
public final static int SHELL = 4; `?:'_Ki
public final static int QUICK = 5; o?>)CAo
public final static int IMPROVED_QUICK = 6; H={,zZ11{
public final static int MERGE = 7; u4Sa4o
public final static int IMPROVED_MERGE = 8; +x1sV*S
public final static int HEAP = 9; IKt9=Tx
Ur@3_F
public static void sort(int[] data) { =~)n,5
sort(data, IMPROVED_QUICK); wBf bpoE7
} xnArYm
private static String[] name={ qQb8K+t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Xc~3rg9
}; OA8pao~H
N4Ym[l
private static Sort[] impl=new Sort[]{ C]k\GlhB
new InsertSort(), V1+IqOXAIp
new BubbleSort(), =LC5o2bLy
new SelectionSort(), T@L^RaPX
new ShellSort(), ,PB?pp8C}
new QuickSort(), _&T$0SZco
new ImprovedQuickSort(), /a,q4tD@
new MergeSort(), N7[~Y2i
new ImprovedMergeSort(), [wExjLW
new HeapSort() OSBE5
}; :r\<DVj
giPyo"SD
public static String toString(int algorithm){ DP?gozm
return name[algorithm-1]; |i|O9^*%
} %c&h:7);
4:K9FqU
public static void sort(int[] data, int algorithm) { f}fM%0/5
impl[algorithm-1].sort(data); S_)va#b#
} {BF$N#7
-1@kt<Es
public static interface Sort { /rquI y^
public void sort(int[] data); C 9DRVkjj
} !$O +M#
$(GXlhA
public static void swap(int[] data, int i, int j) { {3l]/X3
int temp = data; >BiJ/[9
data = data[j]; oRCj]9I$
data[j] = temp; ?O28Q DUI
} ^JH 4: h
} VlKWWQj