[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; dD'KP4Io@
} n ~&ssFC
int i1=l; C~K/yLCAi
int i2=mid+1; p`Tl)[*
for(int cur=l;cur<=r;cur++){ 6Fk[wH7
if(i1==mid+1) BT;1"l<
data[cur]=temp[i2++]; w8cnSO
else if(i2>r) yLnTIE3)
data[cur]=temp[i1++]; bO6cv{>x
else if(temp[i1] data[cur]=temp[i1++]; fpjFO&ML
else .wWf#bB
data[cur]=temp[i2++]; qC& xuu|
} Dp#27Yzc
} s(s_v ?k
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} 1rue+GL
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改进后的归并排序: ?}W#j
-;HZ!Lf
package org.rut.util.algorithm.support; CI \O)iB
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import org.rut.util.algorithm.SortUtil; $:-C9N29
yDe*-N\'W
/** L"?4}U:
* @author treeroot ?;(!(<{
* @since 2006-2-2 JJM!pD\h
* @version 1.0 0|0IIgy
*/ ,m7Z w_.
public class ImprovedMergeSort implements SortUtil.Sort { 9!2$?xqym
jE5=e</
private static final int THRESHOLD = 10; zH~g5xgh
0lcwc"_DZX
/* ov\%*z2=
* (non-Javadoc) 673G6Nk
* :'fK`G 6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {+kWK;1
*/ &@2`_%QtA
public void sort(int[] data) { @Y(7n/*
int[] temp=new int[data.length]; :,/ \E
mergeSort(data,temp,0,data.length-1); XC390t
} 6/(Z*L"~6k
<3=k
private void mergeSort(int[] data, int[] temp, int l, int r) { >%_i#|dE>
int i, j, k; ]i `~J
int mid = (l + r) / 2; rXe+#`m2
if (l == r) eB,@oo%
return; Tn38]UL
if ((mid - l) >= THRESHOLD) Nii5},
mergeSort(data, temp, l, mid); Ur""&@
else z!~{3M
insertSort(data, l, mid - l + 1); }y*rO(cu7G
if ((r - mid) > THRESHOLD) 9~iDL|0'~
mergeSort(data, temp, mid + 1, r); Na.e1A&?j
else uIJ zz4
insertSort(data, mid + 1, r - mid); ?4Zo0DiUB
#X5Tt ;
for (i = l; i <= mid; i++) { N$ 2Iz
temp = data; vDc&m
} [{ A5BE -
for (j = 1; j <= r - mid; j++) { q'biTn]2
temp[r - j + 1] = data[j + mid]; 1gYvp9Ma
} :ZM=P3QZ
int a = temp[l]; ]tbl1=|
int b = temp[r]; }k8&T\V!
for (i = l, j = r, k = l; k <= r; k++) { wG22ffaki
if (a < b) { oOQ0f |MGp
data[k] = temp[i++]; ]ddL'>$c$
a = temp; :?#wWF.
} else { 0J= $ A
data[k] = temp[j--]; G#'G9/Tm
b = temp[j]; *vzj(HGO
} k.H4Mf(4
} C\cZ
} 5Ak>/QF9
]}_Ohe]X
/** gGbqXG^
* @param data /"1[qT\F
* @param l OnE~0+
* @param i |X~vsM0
*/ 2QIo|$
private void insertSort(int[] data, int start, int len) { VZA>ErB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FvBnmYnW
} %-NG eN8
} .Na'yS `J
} 7bkh")^
} L7.LFWq$S
mi sPJO&QD
堆排序： DJRr
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package org.rut.util.algorithm.support; 6wyhL-{:
93Qx+oK]
import org.rut.util.algorithm.SortUtil; xn7bb[g;
U }}E E~W
/** NX<Q}3cC
* @author treeroot n(Ry~Xu_
* @since 2006-2-2 [>kzQYT[
* @version 1.0 FzFP 0
*/ FOX0
public class HeapSort implements SortUtil.Sort{ gAy"W$F
')E4N+h/
/* (non-Javadoc) 88atj+N]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LO,k'gg<
*/ DEpn>
public void sort(int[] data) { =,W~^<\"
MaxHeap h=new MaxHeap(); NUX2{8gs
h.init(data); [\ppKC
for(int i=0;i h.remove(); JB!KOzw
System.arraycopy(h.queue,1,data,0,data.length); _We4%
} HwZ@T &_4
N*>&XJ#
private static class MaxHeap{ IeE6?!,)
T7XbbU
void init(int[] data){ D4QLlP
this.queue=new int[data.length+1]; ZL- ` 3x
for(int i=0;i queue[++size]=data; uy=E92n3
fixUp(size); :}fIu?hCA
} DYL\=ya1
} &vS@-K
;8<lgZ9H<
private int size=0; Kdd5ysTQ
#TY[\$BHs
private int[] queue; d0 yZ9-t
Cv1CRmqq%
public int get() { _VAX~Y]
return queue[1]; ltG|#(
} k|_LF[*Z
^9*Jz{e
public void remove() { SV_b(wP9
SortUtil.swap(queue,1,size--); nA XWbavY
fixDown(1); i.>d#S
} 17;qJ_T)
file://fixdown 4ew#@
private void fixDown(int k) { v@]\ P<E
int j; IgtTYxI
while ((j = k << 1) <= size) { w<=-n;2
if (j < size %26amp;%26amp; queue[j] j++; se]QEd7]7
if (queue[k]>queue[j]) file://不用交换 YH$whJ`W0
break; w,zgYX&
SortUtil.swap(queue,j,k); KH76Vts
k = j; WEugm603
} ,[ M^rv
} r*4@S~;
private void fixUp(int k) { [5jXYqD=vj
while (k > 1) { 1FmqNf:V7I
int j = k >> 1; ST^{?Q
if (queue[j]>queue[k]) o^&nkR
break; cP(is!
SortUtil.swap(queue,j,k); tY$4k26
k = j; }h_= n>
} '9q:gFO
} nM&UdKf3
,L7:3W
} *v9 {f?
Eg|C
} 8AVG pL
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SortUtil： B"fKv0
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package org.rut.util.algorithm; @ Yzj
91j.%#[v'
import org.rut.util.algorithm.support.BubbleSort; e't1.%w
import org.rut.util.algorithm.support.HeapSort; .2:S0=xt<
import org.rut.util.algorithm.support.ImprovedMergeSort; Z?tw#n[T
import org.rut.util.algorithm.support.ImprovedQuickSort; F6 c1YI[
import org.rut.util.algorithm.support.InsertSort; 8&KqrA86
import org.rut.util.algorithm.support.MergeSort; 8n)3'ok
import org.rut.util.algorithm.support.QuickSort; Nc[V kJ]
import org.rut.util.algorithm.support.SelectionSort; ,O]AB
import org.rut.util.algorithm.support.ShellSort; 2*@.hBi
?o6\>[O
/** CaqMLi%
* @author treeroot 1q;r4$n
* @since 2006-2-2 rA#Ji~
* @version 1.0 Y!L<& sl
*/ nfzKUJY
public class SortUtil { $ACD6u6
public final static int INSERT = 1; 0}y-DCuQ
public final static int BUBBLE = 2; |F^h>^ x
public final static int SELECTION = 3; _a~-B@2g
public final static int SHELL = 4; >^hy@m
public final static int QUICK = 5; Sk&l8"
public final static int IMPROVED_QUICK = 6; b!xm=U
public final static int MERGE = 7; ^5d9n<_xnQ
public final static int IMPROVED_MERGE = 8; 1*J#:|({(
public final static int HEAP = 9; `di/nv)
BY^5z<^.
public static void sort(int[] data) { \H5{[ZUn
sort(data, IMPROVED_QUICK); p?zh4:\F+
} C1KO]e>
private static String[] name={ -$m?ShDd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^L;k
}; Q.Ljz Z
i@XFnt
private static Sort[] impl=new Sort[]{ CHRO9
new InsertSort(), oc3}L^aD
new BubbleSort(), (N25.}8Y
new SelectionSort(), '=eE6=m^K
new ShellSort(), <FFaaGiE>
new QuickSort(), @:"GgkyDl#
new ImprovedQuickSort(), koAM",5D
new MergeSort(), [v$NxmRu
new ImprovedMergeSort(), #[{xEVf
new HeapSort() mjz<,s`D
}; '+{dr\nJ
l]o)KM<
public static String toString(int algorithm){ PC}m.tE
return name[algorithm-1]; SQd`xbIuL
} iNAaTU
HfgK0wIi
public static void sort(int[] data, int algorithm) { ^U4|TR6mub
impl[algorithm-1].sort(data); @|GKNW#
} !HP/`R
P?P))UB5
public static interface Sort { Ho:X.Z9A^
public void sort(int[] data); !1\jD
} +w pe<T
dECH/vJ^
public static void swap(int[] data, int i, int j) { HGjGV]N5
int temp = data; cWA$O*A
data = data[j]; E@F:U*A6%
data[j] = temp; xz$S5tgDQK
} eZWR)+aq
} @j Y_^8#S