[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; }8joltf
} ?p&CR[
int i1=l; ]j=Eof%Rc
int i2=mid+1; >h!>Ll
for(int cur=l;cur<=r;cur++){ U%<E9G594
if(i1==mid+1) [;/4'
data[cur]=temp[i2++]; SVJL|S3k
else if(i2>r) %9^^X6yLM
data[cur]=temp[i1++]; > T$M0&<
else if(temp[i1] data[cur]=temp[i1++]; T/m4jf2
else Z4&,KrV
data[cur]=temp[i2++]; j@7%%
} FR bmeq3c
} &oU) ,H
B^;G3+}
} XBvJc'(s
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改进后的归并排序: eUY/H1
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package org.rut.util.algorithm.support; -k4w$0)
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import org.rut.util.algorithm.SortUtil; ][gr(-68
,b b/ $
/** WNO|ziy
* @author treeroot 1" k_l.\,0
* @since 2006-2-2 V8C62X
* @version 1.0 PG51+#
*/ 9)y7K%b0
public class ImprovedMergeSort implements SortUtil.Sort { -VC kk
-l:4I6-hi
private static final int THRESHOLD = 10; e1Ne{zg~
rAv)k&l
/* /-{C,+cB
* (non-Javadoc) FV 0x/)<z
* 9a$\l2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qru iQ/t
*/ %>)HAx `
public void sort(int[] data) { GBh$nVn$
int[] temp=new int[data.length]; Lm!/iseGv
mergeSort(data,temp,0,data.length-1); -za+Wa`vH
} WLO4P
80'!XKSP
private void mergeSort(int[] data, int[] temp, int l, int r) { =yR$^VSY
int i, j, k; KxA^?,t[
int mid = (l + r) / 2; 5 R*
if (l == r) ?Q?=I,2bP
return; o(gEyK
if ((mid - l) >= THRESHOLD) nq/SGo[c
mergeSort(data, temp, l, mid); iNlY\67sW
else =ws iC'
insertSort(data, l, mid - l + 1); EC:u;2f!
if ((r - mid) > THRESHOLD) \dx$G?R
mergeSort(data, temp, mid + 1, r); VR'R7
else GR%h3HO2&
insertSort(data, mid + 1, r - mid); XCo3pB Wq~
VZhHO d
for (i = l; i <= mid; i++) { w3<%wN>tE
temp = data; 0gIJ&h6*f
} ?q*,,+'0
for (j = 1; j <= r - mid; j++) { PLV-De
temp[r - j + 1] = data[j + mid]; $2kZM4
} ]%Db%A
int a = temp[l]; :`Z'vRj
int b = temp[r]; 4#MPD
for (i = l, j = r, k = l; k <= r; k++) { ='[J.
if (a < b) { \nzaF4+$
data[k] = temp[i++]; C"gH>G
a = temp; 0etJ, _">
} else { 3g{T+c*
data[k] = temp[j--]; ;^"#3_7T]
b = temp[j]; SjmWlf,
} ozCH1V{p
} cns~)j~
} ]di^H>,xU
4WAs_~
/** ^*$lCUv8p
* @param data > &VY
* @param l I'%\ E,
* @param i x%`.L6rj
*/ \F; S
private void insertSort(int[] data, int start, int len) { lQ{o[axT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &tjv.t
} 4b@Awtk
} O:J;zv\
} tK0Ksnl^
} (rT1wup
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堆排序： B/^1uPTZ71
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package org.rut.util.algorithm.support; c]x'}Kc
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import org.rut.util.algorithm.SortUtil; 4k]DktY}.
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/** z0F'zN3J
* @author treeroot ;,2;J3,pA
* @since 2006-2-2 D8O&`!mf
* @version 1.0 aGx[?}=
*/ }rKKIF^f\S
public class HeapSort implements SortUtil.Sort{ .B?J@,
kw$*o k
/* (non-Javadoc) 9^zA(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oScKL#Hu
*/ tB<2mjg
public void sort(int[] data) { v-MrurQ4
MaxHeap h=new MaxHeap(); d^:(-2l-
h.init(data); ?AlTQL~c
for(int i=0;i h.remove(); )*m#RqLQ8
System.arraycopy(h.queue,1,data,0,data.length); bpaS(nBy
} ~]l T>|X
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private static class MaxHeap{ |EpL~G_
abczW[\
void init(int[] data){ RHj<t");
this.queue=new int[data.length+1]; &f"kWOe$X
for(int i=0;i queue[++size]=data; rP<S =eb
fixUp(size); TPi=!*$&
} uupfL>h
} sI% =G3o=
?>}&,:U}
private int size=0; MVYf-'\^
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private int[] queue; h;RKF\U:"
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public int get() { VYAz0H1-_
return queue[1]; QZO9CLX 8k
} J.g4I|{
,>vI|p,/G*
public void remove() { :h!&.FB
SortUtil.swap(queue,1,size--); Dxx`<=&g
fixDown(1); bi<?m^j
} JXNfE,_
file://fixdown #-^y9B
private void fixDown(int k) { l6y*SW5+
int j; Uoqt
while ((j = k << 1) <= size) { wx*)7Y*
if (j < size %26amp;%26amp; queue[j] j++; d~za%2{
if (queue[k]>queue[j]) file://不用交换 qs 0'}>
break; iI@m e=
SortUtil.swap(queue,j,k); V.H<KyaJ
k = j; O<}KrmUC~
} n| [RXpAp3
} [KT1.5M[
private void fixUp(int k) { i3usZ{_r
while (k > 1) { w}:&+B:
int j = k >> 1; W:TF8Onw
if (queue[j]>queue[k]) d2=Z=udd
break; TQiDbgFo
SortUtil.swap(queue,j,k); {klyVb
k = j; +1(L5Do}
} uHu(
} ADW>
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} 5IfyD ]<
tI;pdR]
} #->#mshd4
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SortUtil： r[votdFo
0X: :<N@
package org.rut.util.algorithm; Vt;!FZ
D@ R>gqb
import org.rut.util.algorithm.support.BubbleSort; 8Z1pQx-P2C
import org.rut.util.algorithm.support.HeapSort; Kulh:d:w
import org.rut.util.algorithm.support.ImprovedMergeSort; +:D90p$e
import org.rut.util.algorithm.support.ImprovedQuickSort; q7-.-k<dQ
import org.rut.util.algorithm.support.InsertSort; _6/q.
import org.rut.util.algorithm.support.MergeSort; Lr;PESV
import org.rut.util.algorithm.support.QuickSort; .C7;T'>!
import org.rut.util.algorithm.support.SelectionSort; 25-5X3(>j=
import org.rut.util.algorithm.support.ShellSort; |v?*}6:a
pQ/ bIuq
/** :f|X$> b
* @author treeroot _5l3e7YN
* @since 2006-2-2 xZpGSlA
* @version 1.0 %^VQw!
*/ { kF"<W
public class SortUtil { szG0?e
public final static int INSERT = 1; fD:>cje
public final static int BUBBLE = 2; Eg;xj@S<2
public final static int SELECTION = 3; n>["h2
public final static int SHELL = 4; =3= $F%
public final static int QUICK = 5; :4'Fq;%C
public final static int IMPROVED_QUICK = 6; D/7hVwMw:
public final static int MERGE = 7; =m6yH_`@
public final static int IMPROVED_MERGE = 8; 1p]Z9$Y
public final static int HEAP = 9; IP e"9xb
wg0hm#X
public static void sort(int[] data) { Dw-i!dq
sort(data, IMPROVED_QUICK); kV$$GLD\
} Ohe*m[
private static String[] name={ WG\gf\=I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V {H/>>k7
}; PRi3=3oF
H6Qb]H.C
private static Sort[] impl=new Sort[]{ ]Y%U5\$
new InsertSort(), ujMics(
new BubbleSort(), xw5LPz;B
new SelectionSort(), M!nwcxB!
new ShellSort(), leMcY6
new QuickSort(), -g`3;1EV^
new ImprovedQuickSort(), MV.$Ay
new MergeSort(), }?vVJm'
new ImprovedMergeSort(), 0*-nVC1
new HeapSort() RxZ#`$F
}; erQ0fW
$hM>%u
public static String toString(int algorithm){ n;+e(ob;;
return name[algorithm-1]; XnCrxj
} #vnJJ#uI|>
|Vq&IfP
public static void sort(int[] data, int algorithm) { E 02l=M
impl[algorithm-1].sort(data); HGJfj*JH
} R:}u(N
f}_d`?K
public static interface Sort { =O?#>3A}
public void sort(int[] data); sHwn,4|iY
} :(o6^%x
oy?>e1Sy*
public static void swap(int[] data, int i, int j) { )rP)-op|A
int temp = data; Q[U_ 0O,A9
data = data[j]; |loo^!I
data[j] = temp; x22:@Ot6
} _/iw=-T
} >*"6zR2 o