[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; g2;lEW
} fg)VO6Wo&
int i1=l; DYDeb i6
int i2=mid+1; C<Z{G%Qm
for(int cur=l;cur<=r;cur++){ 4`GOBX1b.y
if(i1==mid+1) bEKhU\@=J
data[cur]=temp[i2++]; .0Kc|b=w
else if(i2>r) lQM&q
data[cur]=temp[i1++]; {sfA$ d0
else if(temp[i1] data[cur]=temp[i1++]; 6Hp+?mmh
else l+a1`O
data[cur]=temp[i2++]; (Z0_e&=*
} ^6On^k[|fw
} O joa3
GEK7q<
} fDwK5?
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改进后的归并排序: Mbp7%^E"A
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package org.rut.util.algorithm.support; %s! |,Cu
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import org.rut.util.algorithm.SortUtil; |M&4[ka}
3K=%I+G(4
/** p0[+Zm{#l
* @author treeroot K9{RU4<
* @since 2006-2-2 oY4^CGk=
* @version 1.0 yeI>b 1>Q
*/ >UQY3C
public class ImprovedMergeSort implements SortUtil.Sort { 5a-x$Qb9
4[(NxXH8M
private static final int THRESHOLD = 10; I>GBnx L
i!x>)E
/* en'"" w
* (non-Javadoc) wRvh/{xB
* =EYWiK77a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z2>LjM) #
*/ [l3ys
public void sort(int[] data) { $nb.[si\
int[] temp=new int[data.length]; 6w=`0r3hy
mergeSort(data,temp,0,data.length-1); ny cn
} XEnu0gr
1ysQvz
private void mergeSort(int[] data, int[] temp, int l, int r) { ?-zuy US
int i, j, k; &+n9T?+b
int mid = (l + r) / 2; En:>c
if (l == r) 6`@b@Kd
return; F"bz<{
if ((mid - l) >= THRESHOLD) ;=7K*npT
mergeSort(data, temp, l, mid); O%3Hp.|!
else u&w})`+u5
insertSort(data, l, mid - l + 1); lm6hFvEZ
if ((r - mid) > THRESHOLD) &JXb) W
mergeSort(data, temp, mid + 1, r); ME$J42
else iy8Jl
insertSort(data, mid + 1, r - mid); ?=ffv]v|
vTgx7gP
for (i = l; i <= mid; i++) { {#:31)P
temp = data; M.K^W`
} XC5/$3'M&
for (j = 1; j <= r - mid; j++) { AN:yL a!
temp[r - j + 1] = data[j + mid]; J\Hv42
} *i}X(sfe
int a = temp[l]; .L+XV y
int b = temp[r]; wk ^7/B
for (i = l, j = r, k = l; k <= r; k++) { {fnx=BaG
if (a < b) { W|D kq
data[k] = temp[i++]; >1(J
a = temp; hJ$9Hb
} else { M+0PEf.
data[k] = temp[j--]; \nt~K}a
b = temp[j]; )q[P&f(h
} {9yf0n
} BY.k.]/
} V ^+p:nP
J*[@M*R;&
/** 4Wp5[(bg
* @param data 'L7qf'RV
* @param l SIV !8mz
* @param i h~m,0nGO
*/ .07`nIs"
private void insertSort(int[] data, int start, int len) { +i!5<nn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wS);KLe3
} CVWT>M<
} +rJ6DZ
} ."H;bfcL_
} bx(@ fl:m
8[KKi~A
堆排序： 8f/KNh7#s
4SZ,X^]I>
package org.rut.util.algorithm.support; {u/1ph-
8 ECX[fw
import org.rut.util.algorithm.SortUtil; X3\PVsH$K
!+Xul_XG
/** W;'fAohr
* @author treeroot E?G'F3i
* @since 2006-2-2 J7* o%W*V
* @version 1.0 X58U>4a
*/ 4%^z=%
public class HeapSort implements SortUtil.Sort{ {_Wrs.a'8
0k5-S~_\
/* (non-Javadoc) _"ciHYHBQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %+H_V1F
*/ !1G KpL
public void sort(int[] data) { W!wof-1
MaxHeap h=new MaxHeap(); J(l\VvK
h.init(data); PqV F}
for(int i=0;i h.remove(); 8u2k-_9
System.arraycopy(h.queue,1,data,0,data.length); hhze5_$_
} $Lr&V~
.`}TND~
private static class MaxHeap{ 3uocAmY
z.Ic?Wz7
void init(int[] data){ bGCC?}\
this.queue=new int[data.length+1]; ==OUd6e}
for(int i=0;i queue[++size]=data; /)6T>/
fixUp(size); &t[[4+Qt
} `9co7[Z
} WM'!|lg
d ItfR'$
private int size=0; orFwy!
&KjMw:l
private int[] queue; } Bf@69
4<i#TCGex3
public int get() { . vb##D
return queue[1]; -N*[f9EJB
} $6a9<&LP_
Z*m^K%qJ
public void remove() { YGJ!!(~r
SortUtil.swap(queue,1,size--); Vr EGR$
fixDown(1); ENuL!H>;*
} =&z+7Pe[
file://fixdown 2y - QH
private void fixDown(int k) { ryL1<u ~
int j; l8FJ\5'M
while ((j = k << 1) <= size) { E`o_R=%
if (j < size %26amp;%26amp; queue[j] j++; /_0B5,6R
if (queue[k]>queue[j]) file://不用交换 iT}>a30]B
break; w7Yu} JY^
SortUtil.swap(queue,j,k); ^%$IdDx
k = j; EB}B75)x
} a;xeHbE
} E7L>5z
private void fixUp(int k) { :1A:g^n
while (k > 1) { W3,r@mi^s7
int j = k >> 1; Ddr.6`VJ
if (queue[j]>queue[k]) gADf9x"b
break; x4I!f)8Q
SortUtil.swap(queue,j,k); /o9it;
k = j; NV* 2
} kG/1
} <=NnrZOF
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} .o/|]d`%
FOQ-KP\=,
} 5-X$"Z|@
}|Qh+{H*.
SortUtil： 46=E- Tq
rWTaCU^qV
package org.rut.util.algorithm; \p(S4?I7
m^QoB
import org.rut.util.algorithm.support.BubbleSort; _<(xjWp 8
import org.rut.util.algorithm.support.HeapSort; 2nyK'k
import org.rut.util.algorithm.support.ImprovedMergeSort; G<?RH"RZr
import org.rut.util.algorithm.support.ImprovedQuickSort; 6CyByj&
import org.rut.util.algorithm.support.InsertSort; 3N_KNW
import org.rut.util.algorithm.support.MergeSort; ';3>rv_
import org.rut.util.algorithm.support.QuickSort; /(^-=pAX
import org.rut.util.algorithm.support.SelectionSort; 4;6"I2;zfG
import org.rut.util.algorithm.support.ShellSort; i{fw?))+
h>`[p,o
/** H1k)ya x4_
* @author treeroot RnkV)ed(
* @since 2006-2-2 zIF1A*UH
* @version 1.0 %@PcQJg U<
*/ N/o?\q8
public class SortUtil { dHY@V>D'-
public final static int INSERT = 1; PA^*|^;Xh
public final static int BUBBLE = 2; > SZ95@Oh
public final static int SELECTION = 3; ;5/Se"Nd
public final static int SHELL = 4; nGVr\u9z
public final static int QUICK = 5; 7KlL%\
public final static int IMPROVED_QUICK = 6; 8'Q+%{?1t
public final static int MERGE = 7; XZOBK^,5^B
public final static int IMPROVED_MERGE = 8; =78y*`L
public final static int HEAP = 9; .4a|^ vT
jA,y.(mR
public static void sort(int[] data) { m~+.vk
sort(data, IMPROVED_QUICK); r ~{nlLO}
} "q?(rx;
private static String[] name={ 5$U49j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0aY|:
}; oO tjG3B({
&E]) sJ0
private static Sort[] impl=new Sort[]{ ;-1KPDIp`
new InsertSort(), dzIBdth
new BubbleSort(), < dE7+w
new SelectionSort(), ck;:84
new ShellSort(), (Iv@SiZf(
new QuickSort(), ~aotV1"D
new ImprovedQuickSort(), #X)DFAtb
new MergeSort(), 9BakxmAc
new ImprovedMergeSort(), &3iI\s[
new HeapSort() W>' DQB
}; XIMh<
570ja7C:
public static String toString(int algorithm){ 1Lf -
return name[algorithm-1]; y;ey(
} .Yk}iHcW.
4M"'B A<
public static void sort(int[] data, int algorithm) { H2],auBY
impl[algorithm-1].sort(data); glch06
} bD v&;Z
I]HYqI
public static interface Sort { Oyb9 ql^
public void sort(int[] data); /[Nkk)8-
} #`@)lU+/
yHY2 SXm
public static void swap(int[] data, int i, int j) { =4)8a"7#.
int temp = data; /*g0M2+OZo
data = data[j]; rv{Wti[
data[j] = temp; &v]xYb)+<
} {v!w2p@
} @[D5{v)S