[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; VUGVIy.
} 5>[j^g+@
int i1=l; >a1ovKF
int i2=mid+1; AT,?dxP J
for(int cur=l;cur<=r;cur++){ c95{Xy
if(i1==mid+1) %Tv^BYQAZ
data[cur]=temp[i2++]; [KjL`
else if(i2>r) @g'SH:}
data[cur]=temp[i1++]; @y`7csbp
else if(temp[i1] data[cur]=temp[i1++]; pxs`g&3yd
else j*;/Cah]k
data[cur]=temp[i2++]; SwPc<Z?P
} 79Vp^GG7
} ^aO\WKkA
?{I]!gI
} O}_Z"y
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改进后的归并排序: kzLtI w&.
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package org.rut.util.algorithm.support; [Lo}_v&
rhe;j//`
import org.rut.util.algorithm.SortUtil; t Sf`
hgi9%>oUB
/** c/E6}OWA
* @author treeroot k"2xyzt*
* @since 2006-2-2 s*DDO67\W
* @version 1.0 Zcn,_b7
*/ 675x/0}GO
public class ImprovedMergeSort implements SortUtil.Sort { FucLcq2Z
Ju7nvxC
private static final int THRESHOLD = 10; 8TnByKZz
~V4&l3o
/* i bwnK?ZA
* (non-Javadoc) Ka\%kB>*`
* 3#Hx^H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @rVBL<!o,
*/ OVm $
public void sort(int[] data) { Xpd^^
int[] temp=new int[data.length]; ii@O&g
mergeSort(data,temp,0,data.length-1); DOm5azO!>
} B[0XzV]Z
0oi =}lV
private void mergeSort(int[] data, int[] temp, int l, int r) { \'40u|f
int i, j, k; K}U}h>N
int mid = (l + r) / 2; bh1WD_
if (l == r) W@x UR-}51
return; z_p/.kQ'5
if ((mid - l) >= THRESHOLD) *tda_B 2
mergeSort(data, temp, l, mid); }]H_|V*f
else <j.bG 7
insertSort(data, l, mid - l + 1); oA&V,r
if ((r - mid) > THRESHOLD) :d<;h:^_
mergeSort(data, temp, mid + 1, r); 217KJ~)'
else $h-5PwHp
insertSort(data, mid + 1, r - mid); &@xixbg
U/oncC5
for (i = l; i <= mid; i++) { 4yH=dl4=44
temp = data; FPu"/4v&
} =,~h]_\_
for (j = 1; j <= r - mid; j++) { :,=no>mMx
temp[r - j + 1] = data[j + mid]; _azg 0.)
} 1v4(
int a = temp[l]; e/m,PE
int b = temp[r]; h*Y);mc$#
for (i = l, j = r, k = l; k <= r; k++) { 8vM}moper
if (a < b) { {qCmZn5
data[k] = temp[i++]; WKQVT I&A.
a = temp; #<bt}Tht
} else { @hiwq7[j
data[k] = temp[j--]; <;.Zms${@
b = temp[j]; N}>XBZy
} mlY0G w_e
} J..>ApX
} 1TKOvy_
+QIM~tt)
/** por[p\M.
* @param data "}]1OL SV
* @param l pCNihZ~
* @param i ":*PC[)W
*/ $@t-Oor;
private void insertSort(int[] data, int start, int len) { @U%I 6 t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~n84x
} 0EYK3<k9!
} '@M
} >yn%.Uoh@
} d9[*&[2J|
n}qHt0N
堆排序： KD^>Vv#
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package org.rut.util.algorithm.support; H>[1DH#b
QtQku1{
import org.rut.util.algorithm.SortUtil; tqIz$84G
iZQwo3"8r
/** ](vshgp2
* @author treeroot Z xLjh
* @since 2006-2-2 l,*v/95h
* @version 1.0 =/"Of
*/ \CL |=8[2
public class HeapSort implements SortUtil.Sort{ lC+p2OG^[
tgDmHxB]0
/* (non-Javadoc) 9/RbfV[)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SM5i3EcFYP
*/ F9ry?g=h
public void sort(int[] data) { x{C=rdp__
MaxHeap h=new MaxHeap(); ?MuM _6
h.init(data); qu8i Jq
for(int i=0;i h.remove(); REhXW_x
System.arraycopy(h.queue,1,data,0,data.length); 2"NRnCx*
} SHPaSq'&N
Rs:<'A
private static class MaxHeap{ +}X?+Epm
r+0"1\f3
void init(int[] data){ 0%}$@H5i
this.queue=new int[data.length+1]; 28-6(oG
for(int i=0;i queue[++size]=data; *~fZ9EkD
fixUp(size); |^Z1 D TAw
} L*9^-,
} n6[bF"v
r^&{0c&o
private int size=0; LGPy>,!
t(CdoE,6
private int[] queue; Lm9y!>1"O
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public int get() { er^z:1'
return queue[1]; X",fp
} %WCA?W0:4
Vf*!m~]Vqi
public void remove() { y%=\E
SortUtil.swap(queue,1,size--); :N%cIxrqP
fixDown(1); /H@k;o
} WKqNJN C
file://fixdown cg<10KT
private void fixDown(int k) { +GgWd=X.Y
int j; ji`N1e,l
while ((j = k << 1) <= size) { g||{Qmr=1
if (j < size %26amp;%26amp; queue[j] j++; SMk{159q&
if (queue[k]>queue[j]) file://不用交换 ?b:J6(-
break; /9|1eSUa
SortUtil.swap(queue,j,k); )dG7$,g
k = j; X^?<, Y)1.
} )m"NO/sJ2
} (zBa2Vmmv
private void fixUp(int k) { ._=Pa)T
while (k > 1) { 6 EE7<&
int j = k >> 1; 42:\1B#[
if (queue[j]>queue[k]) ? 8S0
break; N6$pOQ
SortUtil.swap(queue,j,k); oGly|L>
k = j; ,y3o ,gl
} 57)S"
} 75@){ :
!~m)_Q5?~
} tk<dp7y7
]OM|Oo
} 06pLa3oi
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SortUtil： 0(ZER sP
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package org.rut.util.algorithm; I_'S|L
}-)2CEj3L%
import org.rut.util.algorithm.support.BubbleSort; De4UGX
import org.rut.util.algorithm.support.HeapSort; IQoz8!guh:
import org.rut.util.algorithm.support.ImprovedMergeSort; 85m[^WGyh
import org.rut.util.algorithm.support.ImprovedQuickSort; v@LK3S/!3
import org.rut.util.algorithm.support.InsertSort; >yg mE`g
import org.rut.util.algorithm.support.MergeSort; 5l2Ph4(
import org.rut.util.algorithm.support.QuickSort; D.j'n-yw
import org.rut.util.algorithm.support.SelectionSort; - P1OD)B
import org.rut.util.algorithm.support.ShellSort; #SQT!4
4s^5t6
/** -wC;pA#o
* @author treeroot z6B/H2
* @since 2006-2-2 '[~NRKQJ
* @version 1.0 utQE$0F
*/ ly}6zOC\
public class SortUtil { yd`xmc)
public final static int INSERT = 1; v6HBO#F'V{
public final static int BUBBLE = 2; qWHH% L;
public final static int SELECTION = 3; /0d_{Y+9
public final static int SHELL = 4; vO%n~l=
public final static int QUICK = 5; p8oOm>B96n
public final static int IMPROVED_QUICK = 6; x$J1%K*
public final static int MERGE = 7; 2+TCFpv
public final static int IMPROVED_MERGE = 8; *.ri8
public final static int HEAP = 9; 5iz]3]}%
IBcCbNs!
public static void sort(int[] data) { ~{0:`)2FQ
sort(data, IMPROVED_QUICK); a:Y6yg%1>
} \kvd;T#t6
private static String[] name={ rm;'/l8Y-E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "L|Ew#
}; gtyo~f
MmI4J$F
private static Sort[] impl=new Sort[]{ rBkLwJ]
new InsertSort(), 5CueD]
new BubbleSort(), yN5g]U.Q
new SelectionSort(), 4cRF3$amd
new ShellSort(), Q$Ga.fI
new QuickSort(), JWr:/?
new ImprovedQuickSort(), bA@!0,m
new MergeSort(), tU>wRw=d
new ImprovedMergeSort(), Q`4=
new HeapSort() (#BkL:dg
}; ePq(:ih
v98=#k!F
public static String toString(int algorithm){ Mhm3u
return name[algorithm-1]; }\:3}'S.$
} xKWqDt
o=_:g >5
public static void sort(int[] data, int algorithm) { T,@.RF
impl[algorithm-1].sort(data); 68Vn]mr#
} }7RR",w
=\B{)z7@6D
public static interface Sort { 9 #TzW9
public void sort(int[] data); Sav]Kxq{
} M")JbuI
@H= d8$
public static void swap(int[] data, int i, int j) { AMG}'P:
int temp = data; n`2d
data = data[j]; 81eDN6 M\
data[j] = temp; 3xxQL,FV
} pzbR.L}'D
} 8V>j-C