[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; B]()
} #>,E"-]f
int i1=l; |j9aTv[`
int i2=mid+1; -\;0gnf{J
for(int cur=l;cur<=r;cur++){ WcY_w`*L
if(i1==mid+1) oaPWeM+
data[cur]=temp[i2++]; L]!![v.VY
else if(i2>r) #ley3rJW]
data[cur]=temp[i1++]; !!V1#?0jw
else if(temp[i1] data[cur]=temp[i1++]; k0ai#3iJ
else =H;'.!77Hx
data[cur]=temp[i2++]; i|AWaG)
} p'%S{v@5((
} I=<Qpd4
i '*!c
} n^hkH1vY
>1Hv c7DP
改进后的归并排序: 1i~q~O,
Z}>F V~4
package org.rut.util.algorithm.support; _(8#
!5?_)
import org.rut.util.algorithm.SortUtil; B&B:P
DQP!e6Of
/** WSxoGly
* @author treeroot Do\j_
* @since 2006-2-2 p}pd&ut1
* @version 1.0 :3D6OBkB
*/ Q3&DA1b`
public class ImprovedMergeSort implements SortUtil.Sort { #Y=b7|l
U!uJ)mm
private static final int THRESHOLD = 10; E0fMFG^P
esBv,b?*
/* !u8IZpf
* (non-Javadoc) Eri007?D
* 4uMMf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) An0N'yo"Z
*/ T|D^kL%m!
public void sort(int[] data) { !m9hL>5vR
int[] temp=new int[data.length]; (GpP=lSSeY
mergeSort(data,temp,0,data.length-1); [M%?[E}>
} &oHr]=xA
h%W,O,K/
private void mergeSort(int[] data, int[] temp, int l, int r) { ji\LC%U-
int i, j, k; rXMc0SPk
int mid = (l + r) / 2; z\ONwMl
if (l == r) )8#-IXxp
return; S(xs;tZ
if ((mid - l) >= THRESHOLD) \zFCph4
mergeSort(data, temp, l, mid); c*E7nc)u
else \mJR^t
insertSort(data, l, mid - l + 1); U/s Z1u-
if ((r - mid) > THRESHOLD) h4 9q(085V
mergeSort(data, temp, mid + 1, r); b1i~F45h
else R13k2jLSQ
insertSort(data, mid + 1, r - mid); %k['<BYG<
B;NK\5>
for (i = l; i <= mid; i++) { Fv %@k{
temp = data; 6|f8DX%3V
} +6jGU'}[
for (j = 1; j <= r - mid; j++) { F*Hovxez
temp[r - j + 1] = data[j + mid]; 8J$1N*J|
} Z]TQ+9t
int a = temp[l]; 9e>2kd
int b = temp[r]; id : ^|
for (i = l, j = r, k = l; k <= r; k++) { JBJ?|}5k4c
if (a < b) { U; <{P
data[k] = temp[i++]; /|UbYe,
a = temp; =1R 2`H\
} else { c7@/<*E+
data[k] = temp[j--]; Pp69|lxV=k
b = temp[j]; I{U|'a
} bf2n%-&9g
} .-& =\}^2l
} aBY&]6^-
w~crj$UM
/** sg}<()
* @param data iiJT%Zq`#
* @param l K3tW Y 4-
* @param i xy!E_CuC$
*/ 7SYe:^Dx
private void insertSort(int[] data, int start, int len) { Z"w}`&TC$^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %'e$N9zd
} &Fuk+Cu{
} d$+0;D4E
} :PY8)39@K
} [kr-gV
L1Yj9i
堆排序： k$J!,!q
rOEBL|P0
package org.rut.util.algorithm.support; )t-P o'RW
Xg_l4!T_l
import org.rut.util.algorithm.SortUtil; w?nSQBz$
iS.gN&\z^
/** nC??exc
* @author treeroot oSy9Xw
* @since 2006-2-2 $/#[,1
* @version 1.0 g;AW
*/ d*k5h<jM
public class HeapSort implements SortUtil.Sort{ Rb:?%\=
knV*,
/* (non-Javadoc) oVbs^sbRH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A(`Mwh+
*/ .T(vGiU
public void sort(int[] data) { -:45Q{u/
MaxHeap h=new MaxHeap(); ^ .A
h.init(data); "ixea- 2
for(int i=0;i h.remove(); jHatUez4O
System.arraycopy(h.queue,1,data,0,data.length); B]gyj
} W)
X#ha*u~U
private static class MaxHeap{ 0ZI}eZA j
&%/T4$'+Y+
void init(int[] data){ ?LU>2!jN
this.queue=new int[data.length+1]; UEYJd&n0CB
for(int i=0;i queue[++size]=data; HP<a'|r
fixUp(size); f qWme:x
} l>s@&%;Mg
} I|;zGmg#k
&><b/,]
private int size=0; ?GLCd7TP
mO]dP;,
private int[] queue; !>Q\Y`a,*
q?]KZ_a
public int get() { MMD=4;X
return queue[1]; K g.O2F77
} THK^u+~LM
TPKD'@:x
public void remove() { 0blbf@XA
SortUtil.swap(queue,1,size--); #a tL2(wJ
fixDown(1); wHx_lsY;
} ty%,T.@e
file://fixdown lU$0e09
private void fixDown(int k) { A =&`TfXu
int j; 01RW|rN
while ((j = k << 1) <= size) { #67 7,dn
if (j < size %26amp;%26amp; queue[j] j++; 2<w vO 9
if (queue[k]>queue[j]) file://不用交换 @" umY-1f
break; f3>DmH#
SortUtil.swap(queue,j,k); U.$Th_
k = j; Y5"HKW^
} # M!1W5#
} R)isWw4
private void fixUp(int k) { 6P,uy;PJ
while (k > 1) { N:+d=G`x
int j = k >> 1; `YMd0*
if (queue[j]>queue[k]) SdnO#J}{
break; GWWaH+F[h
SortUtil.swap(queue,j,k); H(M{hfa|
k = j; m"'`$/_
} +~y>22Zfg
} ,LmP >Q.
~0?B
} x_C0=Q|K3
d:#tN4y7(
} cJTwgm?
tL<.B
SortUtil： w $`w
^7=7V0>,:
package org.rut.util.algorithm; E2>+V{TF
\.Op6ECV9
import org.rut.util.algorithm.support.BubbleSort; "{t]~urLd
import org.rut.util.algorithm.support.HeapSort; asCcBp
import org.rut.util.algorithm.support.ImprovedMergeSort; yg~@}_C2_
import org.rut.util.algorithm.support.ImprovedQuickSort; ~ ^
import org.rut.util.algorithm.support.InsertSort; [/n@BK
import org.rut.util.algorithm.support.MergeSort; $P%cdJT0
import org.rut.util.algorithm.support.QuickSort; ~$"2,&
import org.rut.util.algorithm.support.SelectionSort; P4/~_$e
import org.rut.util.algorithm.support.ShellSort; L*vKIP<EMM
gA@Zx%0j
/** ]T2Nr[vu
* @author treeroot L<Z,@q`
* @since 2006-2-2 Xw7'I
* @version 1.0 :rjfAe=s
*/ apfr>L3
public class SortUtil { iXvrZofE
public final static int INSERT = 1; HTvUt*U1
public final static int BUBBLE = 2; _)~VKA]""
public final static int SELECTION = 3; ?~yJ7~3TS<
public final static int SHELL = 4; 5wl;fL~e
public final static int QUICK = 5; #5'& |<
public final static int IMPROVED_QUICK = 6; ``6-
public final static int MERGE = 7; Nv6"c<(L=
public final static int IMPROVED_MERGE = 8; uxh>r2Xr=
public final static int HEAP = 9; ?N!kYTR%}
%:;g|PC
public static void sort(int[] data) { G|8>Q3D
sort(data, IMPROVED_QUICK); ~oT*@
} urCTP.F
private static String[] name={ jF/S2Ty2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g]`YI5
}; ?A*!rW:l;
',LC!^:~Nw
private static Sort[] impl=new Sort[]{ ;YW@ 3F-h
new InsertSort(), 7v0AG:
new BubbleSort(), U/|JAg#
new SelectionSort(), ]yZ%wU9!
new ShellSort(), n9`]}bnX
new QuickSort(), 5/7(>ivn
new ImprovedQuickSort(), AYNdV(
new MergeSort(), h8(>$A-
new ImprovedMergeSort(), cY kb3(
new HeapSort() (}.MB3`#C
}; '\xE56v)F
h0g?=hJq
public static String toString(int algorithm){ uZ\+{j=
return name[algorithm-1]; 8UqH"^9.Q7
} jC{KI!kPt
#d-zH:uq
public static void sort(int[] data, int algorithm) { $uyx
impl[algorithm-1].sort(data); >8=lX`9f{
} ()O&O+R|)
ugE!EEy[^
public static interface Sort { A~<!@`NjB
public void sort(int[] data); gkA_<,38
} } e+`Kxy
dIYf}7P
public static void swap(int[] data, int i, int j) { 9!W$S[ABRB
int temp = data; xy"'8uRi
data = data[j]; $/;K<*O$
data[j] = temp; Yv@n$W`:
} WQ%O/
} #vga qe9