[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; OO\UF6MCU
} 6%fU}si,
int i1=l; 4#=^YuKaF1
int i2=mid+1; c{&sf y
for(int cur=l;cur<=r;cur++){ [c3hwogf:
if(i1==mid+1) SUvHLOA
data[cur]=temp[i2++]; `Y+p7*Qr2
else if(i2>r) eJ?SLMLY
data[cur]=temp[i1++]; 9]kWM]B)o
else if(temp[i1] data[cur]=temp[i1++]; XFM6.ye
else /j.V0%
data[cur]=temp[i2++]; C0kwI*)
} cIq3En
} =P2T&Gb
x#pTB.
} m4kmJaM
1_<'S34
改进后的归并排序: zzPgLE55
hS<x+|'l
package org.rut.util.algorithm.support; 9-L.?LG
h{>8W0W*
import org.rut.util.algorithm.SortUtil; `cVG_=2
|@Z QoH
/** B\N,%vsx#U
* @author treeroot \7Zk[)!FL
* @since 2006-2-2 i;Gl-b\_h
* @version 1.0 ;1F3.ibE
*/ Ba@UX(t
public class ImprovedMergeSort implements SortUtil.Sort { m2\ZnC
(+T|B E3*#
private static final int THRESHOLD = 10; b%pLjvU
G =lC[i
/* -<CBxyZa&
* (non-Javadoc) b/<n:*$
* #mtlgK'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -+c_TJ.dC
*/ -vhgBru
public void sort(int[] data) { >5XE*9
int[] temp=new int[data.length]; Xf$,ra"
mergeSort(data,temp,0,data.length-1); 9/Q5(P
} `bivAL
[j:%O|h
private void mergeSort(int[] data, int[] temp, int l, int r) { c)lMi}/
int i, j, k; CJ%7M`zy
int mid = (l + r) / 2; qzV:N8+,`
if (l == r) r)h+pga5^E
return; -KOE2f
if ((mid - l) >= THRESHOLD) VIynlvy
mergeSort(data, temp, l, mid); !_zmm$bR
else g3"`b)M
insertSort(data, l, mid - l + 1); |-Y,:sY:
if ((r - mid) > THRESHOLD) h!MZ6}zb)
mergeSort(data, temp, mid + 1, r); a}%>i~v<
else P^.L0T5g
insertSort(data, mid + 1, r - mid); G?YKm1:w
h5B'w
for (i = l; i <= mid; i++) { ~0ZP%1.B3
temp = data; 6i>xCb
} wYS4#7
for (j = 1; j <= r - mid; j++) { n?:s/6tP
temp[r - j + 1] = data[j + mid]; e'g-mRh
} z`{Ld9W
int a = temp[l]; =y^N'1q
int b = temp[r]; cojuU=i
for (i = l, j = r, k = l; k <= r; k++) { ]LNP"vi;
if (a < b) { Tpkm\_
data[k] = temp[i++]; =[vT=sHz7
a = temp; Q- j+#NGc
} else { -,}f6*
data[k] = temp[j--]; +ZXk0sP_<
b = temp[j]; +FyG{1?<
} .pG_j]
} 2sWM(SN
} u9}=g%TV
e|xRK?aVBu
/** r@k&1*&
* @param data 5f}wQ
* @param l !=eui$]
* @param i s_p?3bKu
*/ NcFHvK
private void insertSort(int[] data, int start, int len) { bIwt#:v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P(qUx9
} 7e>n{rl
} :C>slxY
} D0tI
} 1^Ci$ra
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堆排序： X_O(j!h
1j3mTP
package org.rut.util.algorithm.support; A"i40 @+
XeJx/'9o{
import org.rut.util.algorithm.SortUtil; "J7=3$CA
ZShRE"`
/** YzsHec
* @author treeroot So,EPB+
* @since 2006-2-2 OG/R6k.
* @version 1.0 `3\5&Bf
*/ K^?/
public class HeapSort implements SortUtil.Sort{ W 4~a`D7
U")bvUIL
/* (non-Javadoc) MhWmY[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E*j)gj9
*/ n1!0KOu/N
public void sort(int[] data) { pz#oRuujY
MaxHeap h=new MaxHeap(); CGny#Vh
h.init(data); ;NBJ@E,
for(int i=0;i h.remove(); jQ(qaX&
System.arraycopy(h.queue,1,data,0,data.length); jt=mK,%
} r1JKTuuo
1i^!A&
private static class MaxHeap{ !fZ{=
~ex1,J*}t
void init(int[] data){ E0Ig/ j
this.queue=new int[data.length+1]; UC\CCDV#^
for(int i=0;i queue[++size]=data; ?0Z?Z3)%w4
fixUp(size); ST] h NM
} Q4}2-}|
} D$!(Iae
\:%e 6M
private int size=0; 34&n{ xv
@=isN'>]O
private int[] queue; $5s?m\!jZz
0,E*9y}
public int get() { LoqS45-)
return queue[1]; ?tV$o,11
} UuzT*Y>
+*mi%)I
public void remove() { N>xs@_"o
SortUtil.swap(queue,1,size--); |ILj}4ZA7
fixDown(1); $wub)^
} yiWBIJ2Wu9
file://fixdown r`HtN{6r
private void fixDown(int k) { $0+AR)
int j; {D 9m//x
while ((j = k << 1) <= size) { e4j:IK>
if (j < size %26amp;%26amp; queue[j] j++; 7GB>m}7
if (queue[k]>queue[j]) file://不用交换 &r;-=ASYzV
break; ^fQ ]>/u
SortUtil.swap(queue,j,k); q`{crY30
k = j; oGu-:X=`9
} 2dFC{US'
} f{t5r
private void fixUp(int k) { z~# .Ey
while (k > 1) { 9l+'V0?`
int j = k >> 1; 4'RyD<K\
if (queue[j]>queue[k]) PB(mUD2"r
break; &k+jVymH
SortUtil.swap(queue,j,k); 4w<U%57
k = j; f]jAa?d T&
} ,Hlbl}.ls
} iqRk\yq<
1}%vZE2
} [z5pqd-
>\+c@o[
} j(AN]g:
" ;8H;U`
SortUtil： iOYC1QFi?
mG*[5?=r
package org.rut.util.algorithm; o $7:*jU
ifHQ2Ug9
import org.rut.util.algorithm.support.BubbleSort; 2/<VoK0b
import org.rut.util.algorithm.support.HeapSort; V\5ZRLawP
import org.rut.util.algorithm.support.ImprovedMergeSort; ( d#E16y
import org.rut.util.algorithm.support.ImprovedQuickSort; >TK:&V
import org.rut.util.algorithm.support.InsertSort; vR[XbsNM
import org.rut.util.algorithm.support.MergeSort; U(4>e!
import org.rut.util.algorithm.support.QuickSort; S%uwQ!=O8
import org.rut.util.algorithm.support.SelectionSort; *9Ej fs7L
import org.rut.util.algorithm.support.ShellSort; :70[zo7n'
Bvk 8b
/** W|XW2`3p
* @author treeroot 7O',X Y
* @since 2006-2-2 8E`A`z
* @version 1.0 UFr ]$m&
*/ e*{'A
public class SortUtil { "j#;MOK
public final static int INSERT = 1; G~b/!clN
public final static int BUBBLE = 2; i|?EgGFG
public final static int SELECTION = 3; 4! ]28[2B6
public final static int SHELL = 4; ixm-wZI
public final static int QUICK = 5; (,*e\o
public final static int IMPROVED_QUICK = 6; 7:awUoV8f
public final static int MERGE = 7; j>Ce06G
public final static int IMPROVED_MERGE = 8; )zzZYs&|
public final static int HEAP = 9; 2uujA* ^
[Q9#44@{S;
public static void sort(int[] data) { >c %*:a
sort(data, IMPROVED_QUICK); qS1byqq78l
} 'M8wjU
private static String[] name={ T?B753I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F6^Xi"R[
}; _=!Rl#
]06orBV
private static Sort[] impl=new Sort[]{ uJhB>/Og
new InsertSort(), " iAwD8-
new BubbleSort(), j N":9+F
new SelectionSort(), W/e6O??O
new ShellSort(), ~U"puEftbs
new QuickSort(), b/"&E'5-`\
new ImprovedQuickSort(), 'b1k0 9'
new MergeSort(), StZ GKY[Q
new ImprovedMergeSort(), mu`:@7+Yp
new HeapSort() P`^3-X/
}; T)4pLN E
CNP!v\D
public static String toString(int algorithm){ b`:n i
return name[algorithm-1]; 4k%y*L
} &q8oalh
mcO/V-\5'
public static void sort(int[] data, int algorithm) { drRi<7 i
impl[algorithm-1].sort(data); W@S>#3,
} nD#QC=}
QAN :
public static interface Sort { V&e9?5@
public void sort(int[] data); .l1uqCuB
} "L ,)4v/J
AIN Fv;
public static void swap(int[] data, int i, int j) { \;#T.@c5
int temp = data; f0!i<9<
data = data[j]; b&]_5 GGc
data[j] = temp; r2!\Ts5v
} )c432).Z
} 9W5~I9%