[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; O("13cU
} 8>a%L?BY
int i1=l; {P!1VYs5
int i2=mid+1; 4O:y ?D/e
for(int cur=l;cur<=r;cur++){ F8d:7`lO@/
if(i1==mid+1) (KnU-E]L
data[cur]=temp[i2++]; _tR?WmNH=
else if(i2>r) *`~]XM@H
data[cur]=temp[i1++]; pMLTXqL
else if(temp[i1] data[cur]=temp[i1++]; .1A/hAdU
else =a!_H=+4
data[cur]=temp[i2++]; \<W/Z.}/
} (svKq(X
} .r\|9 *j<
/xw}]Fa5
} 9|qzFmE#
rIQ%X`Y
改进后的归并排序: D/bF
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package org.rut.util.algorithm.support; hK 1 H'~c
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import org.rut.util.algorithm.SortUtil; qw6i|JM%
_DLELcH Y
/** 0rCQz3gh1
* @author treeroot uG=~kO
* @since 2006-2-2 ~+CEek
* @version 1.0 fRomP-S
*/ bO+]1nZ.
public class ImprovedMergeSort implements SortUtil.Sort { <KBS ;t="1
a9g~(#?a
private static final int THRESHOLD = 10; $tB `dDj
p&k%d, *
/* kV@?Oj.&I,
* (non-Javadoc) rBZ0Fx$/[
* W}'l8z]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mew,g:m:
*/ %Z+FX,AK
public void sort(int[] data) { H_FT%`iM
int[] temp=new int[data.length]; ob]j1gYb
mergeSort(data,temp,0,data.length-1); UM:]QbaIn
} tX~*.W:
=2e{T J/
private void mergeSort(int[] data, int[] temp, int l, int r) { ~'w]%rh!
int i, j, k; fxknfgbg
int mid = (l + r) / 2; UT_kw}1o
if (l == r) ,ut7`_Fy
return; kc/"
if ((mid - l) >= THRESHOLD) : 22)` ;0
mergeSort(data, temp, l, mid); B,U|V
else 9Xh1i`.D
insertSort(data, l, mid - l + 1); ;*njS1@
if ((r - mid) > THRESHOLD) uP$C2glyz
mergeSort(data, temp, mid + 1, r); aW_Pv~
else /z`.-D(
insertSort(data, mid + 1, r - mid); xiOAj"}~
c'SjH".[
for (i = l; i <= mid; i++) { [,sm]/Xlc
temp = data; ^X ~S}MX
} eL88lV]I
for (j = 1; j <= r - mid; j++) { cy0j>-z
temp[r - j + 1] = data[j + mid]; VWrb`p@
} mv>-XJ+
int a = temp[l]; E?S
int b = temp[r]; <FfmDR
for (i = l, j = r, k = l; k <= r; k++) { 0( q:K6zI}
if (a < b) { )3.=)?XW
data[k] = temp[i++]; [xo-ZDIoG
a = temp; {Kz!)uaC
} else { ZC"a#rQ
data[k] = temp[j--]; Q[)3r ,D
b = temp[j]; .S[M:<<*
} zE+^WeH|
} =rA]kGx
} [@Mo3]#\
S4VM(~,o
/** @]etW>F_
* @param data kQD~v+u{`
* @param l TeKU/&fkc
* @param i B*:W`}G]_c
*/ ?-JW2 E"uT
private void insertSort(int[] data, int start, int len) { '0v]?mM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iLQ;`/j
} l~mj>$
} Zi{vEI]
} U#:N/ts*(
} X 4\V4_
>dXB)yl
堆排序： T%4yPmY
>4bWXb'S}C
package org.rut.util.algorithm.support; -ufaV#
'LYN{
import org.rut.util.algorithm.SortUtil; X@za4d
{01^xn.
/** M[P1hFuna
* @author treeroot mFt\xGa
* @since 2006-2-2 'EC0|IT)c
* @version 1.0 a fLE9
*/ M[cAfu
public class HeapSort implements SortUtil.Sort{ (-xVW#39
iy|;xBI,
/* (non-Javadoc) `NfwW:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .|@2Uf
*/ duc\/S'
public void sort(int[] data) { q);oO\<
MaxHeap h=new MaxHeap(); 0{/'[o7
h.init(data); m[ER~]L/C
for(int i=0;i h.remove(); BmaY&?
System.arraycopy(h.queue,1,data,0,data.length); hPuF:iiQ4
} Z%JAX>v&B
x>+sqFd\
private static class MaxHeap{ 2M)E1q|a
`yh][gqVE~
void init(int[] data){ I#;.;%u
this.queue=new int[data.length+1]; 3gYtu-1
for(int i=0;i queue[++size]=data; xVTl
fixUp(size); 5b->pc
} -@Z9h)G|
} KQ0f2?
udPLWrPF\
private int size=0; pm2]
f8-~&N/_R
private int[] queue; $3xDjiBb
h-fm)1S_
public int get() { }\1V%c
return queue[1]; P MI?PC[;
} :s1.TQ;Y(
eQ,VK`7X
public void remove() { qB+OxyT&
SortUtil.swap(queue,1,size--); 'sTc=*p/
fixDown(1); \F)WUIK
} JOyM#g9-?
file://fixdown %qEp{itq
private void fixDown(int k) { r{f$n
int j; 2OjU3z<J
while ((j = k << 1) <= size) { (:R5"|]@<x
if (j < size %26amp;%26amp; queue[j] j++; PmQeO*f+
if (queue[k]>queue[j]) file://不用交换 5sSAH
break; BZIU@^Q_Y[
SortUtil.swap(queue,j,k); +0%Y.O/{
k = j; 0}M'>
} Ym6v4k!@O
} _Td#C1g3
private void fixUp(int k) { j+e s
while (k > 1) { S5r.so
int j = k >> 1; uQKo2B0
if (queue[j]>queue[k]) aSI%!Vg.
break; i=&]%T6Qk
SortUtil.swap(queue,j,k); )1 QOA
k = j; FGeKhA 8jT
} aGAr24]y
} r.c:QY$
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} [fY7|
0}po74x*r
} TP/bX&bjCy
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SortUtil： ])q,mH
]YOWCFAQot
package org.rut.util.algorithm; w-C%,1F,/
=E-o@#BS
import org.rut.util.algorithm.support.BubbleSort; O\6gw$
import org.rut.util.algorithm.support.HeapSort; 5BK3ix*L
import org.rut.util.algorithm.support.ImprovedMergeSort; 2*] [M,L0c
import org.rut.util.algorithm.support.ImprovedQuickSort; a'd=szt
import org.rut.util.algorithm.support.InsertSort; iiWpmE<,
import org.rut.util.algorithm.support.MergeSort; Tl#2w=
import org.rut.util.algorithm.support.QuickSort; 6PC?*^v
import org.rut.util.algorithm.support.SelectionSort; y1[@4TY]
import org.rut.util.algorithm.support.ShellSort; S,Q(,e^&
`fl$ o6S/
/** h92KU
* @author treeroot A`"?~_pHC
* @since 2006-2-2 $GHi9aj_P
* @version 1.0 FF0~i+5
*/ Ul3xeu
public class SortUtil { 8L]Cc!~
public final static int INSERT = 1; :B\$7+$v
public final static int BUBBLE = 2; Z~[eG"6zI
public final static int SELECTION = 3; 4~8-^^
public final static int SHELL = 4; TX7dwmt)N
public final static int QUICK = 5; sHPj_d#
public final static int IMPROVED_QUICK = 6; =(~ZmB\
public final static int MERGE = 7; /82E[P"}6R
public final static int IMPROVED_MERGE = 8; ~Q5]?ZNX
public final static int HEAP = 9; b5ul|p
J*m7 d4^
public static void sort(int[] data) { igEqty!.
sort(data, IMPROVED_QUICK); 0uIBaW3s
} M#Q"h5l
private static String[] name={ wWSE[S$V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G[u{! 2RS
}; : %uaaFl
?b93! Q1
private static Sort[] impl=new Sort[]{ nB]mj_)R^
new InsertSort(), 1&vR7z]*
new BubbleSort(), Wtp=1
new SelectionSort(), #%L_wJB-
new ShellSort(), o/[Ks;l
new QuickSort(), T_#8i^;D
new ImprovedQuickSort(), *SpE XO
new MergeSort(), _;:_ !`
new ImprovedMergeSort(), [;o>q;75Jz
new HeapSort() sbFIKq]
}; t~BWN
vsQvJDna~
public static String toString(int algorithm){ _>r(T4}]
return name[algorithm-1]; J25/Iy*byG
} *pABdP+
Z`|\%D%
public static void sort(int[] data, int algorithm) { (cV1Pmn
impl[algorithm-1].sort(data); -Owb@Nw
} 7Jd&9&O U
lHHx D
public static interface Sort { px(~ZZB"
public void sort(int[] data); Lr(JnS
} _H-Fm$Q
PO^#G@
public static void swap(int[] data, int i, int j) { (ak&>pk;
int temp = data; Wg<o%6`
data = data[j]; <I0om(P
data[j] = temp; E*kZGHA
} DF'~ #G8
} 5+j):_