[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; S<o\.&J
} \E8CC>Jd
int i1=l; S{S.H?{F
int i2=mid+1; 8,&pX ga
for(int cur=l;cur<=r;cur++){ 1$v1:6
if(i1==mid+1) 5e >qBw8t
data[cur]=temp[i2++]; 1#V&'A
else if(i2>r) oV;I8;#\J
data[cur]=temp[i1++]; f-5}`)`.+
else if(temp[i1] data[cur]=temp[i1++]; yv(\5)XF
else H|8i|vbi
data[cur]=temp[i2++]; GmdS~Fhp
} ia*Bcx_RW+
} +i(;@% kv
+kM*BCPYE
} OE(!^"5?[
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改进后的归并排序: df8aM<&m3
vq8&IL
package org.rut.util.algorithm.support; iu+rg(*%
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import org.rut.util.algorithm.SortUtil; oLc
v"V?
/** pKhV<MFB
* @author treeroot n_S)9C'=
* @since 2006-2-2 pP*`b<|
* @version 1.0 %0lJ(hm
*/ 2X`5YN;
public class ImprovedMergeSort implements SortUtil.Sort { Uq=!>C8
8?[#\KgH1
private static final int THRESHOLD = 10; 6B&ERdoX
G0Wv=tX|
/* (R^Ca7F
* (non-Javadoc) QvDD
* tS sDW!!M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vFH1hm
*/ c n^z=?
public void sort(int[] data) { T`K4nU#
int[] temp=new int[data.length]; P7y.:%DGD0
mergeSort(data,temp,0,data.length-1); A>Xt 5vk+
} T]y^PT<8?
`t Zw(Z=h
private void mergeSort(int[] data, int[] temp, int l, int r) { ]7 2wv#-
int i, j, k; wKj0vMW
int mid = (l + r) / 2; mVEHVz $
if (l == r) EM0]"s@Lf
return; ]V.0%Ccw;.
if ((mid - l) >= THRESHOLD) xYD.j~
mergeSort(data, temp, l, mid); M|\C@,F]8
else |s{[<;
insertSort(data, l, mid - l + 1); =(]||1.
if ((r - mid) > THRESHOLD) %z5P%F'5
mergeSort(data, temp, mid + 1, r); PXDwTuyc
else +HfZs"x
insertSort(data, mid + 1, r - mid); /]hE?cmj
5 $: q
for (i = l; i <= mid; i++) { 5}he)2*uD
temp = data; Fy-|E>@]D
} .J.| S4D
for (j = 1; j <= r - mid; j++) { Y]9C8c)
temp[r - j + 1] = data[j + mid]; 50Y^##]&
} ?%wM8?
int a = temp[l]; 4kdQ h]
int b = temp[r]; SAtK 'Jx[
for (i = l, j = r, k = l; k <= r; k++) { @Yzc?+x
if (a < b) { :yE7jXB
data[k] = temp[i++]; }@NT#hD
a = temp; 5d5q0bb
} else { 07qL@![!
data[k] = temp[j--]; W6L}T,epX
b = temp[j]; [y1 x`WOk9
} [cvtF(,
} JN<IMH
} "M4gl
Ilv _.
/** "%fvA;
* @param data k5TPzm=y{
* @param l X7{ h/^
* @param i q?2kD"%$
*/ AZ& ]@Ao
private void insertSort(int[] data, int start, int len) { 4Q5c'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r-IG.ym3
} }5a$Ka-
} HA::(cXL
} HT6+OK(~dJ
} 3m59EI-p
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堆排序： )kuw&SH,
E1V;eoK.D
package org.rut.util.algorithm.support; (#%R'9Rv
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import org.rut.util.algorithm.SortUtil; LSN%k5G7.
Tv`-h
/** kr6^6I.
* @author treeroot +oe%bk|A
* @since 2006-2-2 84UI)nE:Q
* @version 1.0 ?~s23%E
*/ *d;D~"E<@
public class HeapSort implements SortUtil.Sort{ }~3 %KHT
v|K<3@J
/* (non-Javadoc) h!UB#-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y~ ( <H e?
*/ ~lB:xVzn
public void sort(int[] data) { EABy<i
MaxHeap h=new MaxHeap(); cnwpd%]o
h.init(data); 3^J~ts{*
for(int i=0;i h.remove(); kEpCF:@A
System.arraycopy(h.queue,1,data,0,data.length); ;^Y]nsd
} ?f ]!~
SFRQpQ06
private static class MaxHeap{ pu9ub.
OJ Y_u[
void init(int[] data){ gBCO>nJws
this.queue=new int[data.length+1]; qD?-&>dBWi
for(int i=0;i queue[++size]=data; b+qdl`Vd
fixUp(size); ^lYa9k
} dJYQdo^X
} 4_B1qN
T($6L7 j9
private int size=0; -yH8bm'0"
%HK\
private int[] queue; %.3]F2_Q
HLml:B[F(
public int get() { D%=FCmL5@=
return queue[1]; g<"k\qs7
} e$+/;MRq
qqR8E&Y{
public void remove() { S0uEz;cE
SortUtil.swap(queue,1,size--); !p#+I=
fixDown(1); /"*eMe!=
} 07:N)y,
file://fixdown aur4Ky> :
private void fixDown(int k) { V=LJ_T"z0
int j; si|DxDx
while ((j = k << 1) <= size) { wqyrs|P
if (j < size %26amp;%26amp; queue[j] j++; Q+]9Glz9
if (queue[k]>queue[j]) file://不用交换 y@?t[A#v
break; :-Al}7
SortUtil.swap(queue,j,k); j/<z[qr
k = j; PWw2;3`-6w
} /5Zt4&r
} 4`Z8EV
private void fixUp(int k) { |-SImxV
while (k > 1) { -Bl!s^-'
int j = k >> 1; *U69rbYI
if (queue[j]>queue[k]) vQiKpO*
break; = g[Cs*
SortUtil.swap(queue,j,k); bEz1@"~ p
k = j; %]15=7#'y
} 5/>W(,5}
} PF4"J^V
F:o<E 42
} Qso"jYl<
V<+=t{
} j~a"z40
6YCFSvA#/
SortUtil： [c=T)]E1
klKd !
package org.rut.util.algorithm; 6]*~!al?
dY'mY~Tv
import org.rut.util.algorithm.support.BubbleSort; `0qBuE_^h
import org.rut.util.algorithm.support.HeapSort; fEB>3hI
import org.rut.util.algorithm.support.ImprovedMergeSort; Pfv| K;3i
import org.rut.util.algorithm.support.ImprovedQuickSort; keYvscRBI
import org.rut.util.algorithm.support.InsertSort; =vaC?d3
import org.rut.util.algorithm.support.MergeSort; dmkd.aP4
import org.rut.util.algorithm.support.QuickSort; T1&^IO-F7$
import org.rut.util.algorithm.support.SelectionSort; 8'Y7lOXS
import org.rut.util.algorithm.support.ShellSort; 1sT%g}w@|
8.'[>VzBL
/** [4_JK
* @author treeroot 4CT _MAj
* @since 2006-2-2 > (.V(]{3y
* @version 1.0 pRAdo="
*/ %SX)Z i=O
public class SortUtil { Q0\tK=Z/
public final static int INSERT = 1; d,R
public final static int BUBBLE = 2; }zkMo?
public final static int SELECTION = 3; *yx&4)Or
public final static int SHELL = 4; HZHzjrx
public final static int QUICK = 5; n4YedjHSN
public final static int IMPROVED_QUICK = 6; y[W<vb+F
public final static int MERGE = 7; E_[)z%&n2
public final static int IMPROVED_MERGE = 8; *61+Fzr
public final static int HEAP = 9; q*^F"D:?k
4%3R}-'mh
public static void sort(int[] data) { u6,NQ^4
sort(data, IMPROVED_QUICK); I,:R~^qJ8v
} G q" [5r"
private static String[] name={ R6N+c\W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h5:>o
}; m\}8N u
EP|OKXRltA
private static Sort[] impl=new Sort[]{ %L\buwjy$
new InsertSort(), *r&q;ER
new BubbleSort(), 5yHarC
new SelectionSort(), xgX"5Czvv`
new ShellSort(), =deqj^&@
new QuickSort(), eoC@b/F4
new ImprovedQuickSort(), i"h '^6M1
new MergeSort(), aa'u5<<W
new ImprovedMergeSort(), A@W/
new HeapSort() WP@IV;i
}; b~1]}9TJ
}nQni?
public static String toString(int algorithm){ Jf/X3\0N7
return name[algorithm-1]; mv,<#<-W
} "K"]/3`k-
KVvzVQ1
public static void sort(int[] data, int algorithm) { h27awO Q
impl[algorithm-1].sort(data); F%8W*Y699
} TH`zp]0
_ 2WG6y;
public static interface Sort { L+c7.l.yT
public void sort(int[] data); qNLG-m,n<
} :< )"G&
q]-CTx$
public static void swap(int[] data, int i, int j) { j#C1+Us
int temp = data; b&y"[1`
data = data[j]; DRBRs-D
data[j] = temp; +0,{gDd+
} u]B15mT?
} Tk^J#};N