[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; 'cc8xC
} $"NH{%95}
int i1=l; hfI=9x/
int i2=mid+1; d #1&"(
for(int cur=l;cur<=r;cur++){ >)C7IQ/
if(i1==mid+1) PcA^ jBgGl
data[cur]=temp[i2++]; 9d|8c > I
else if(i2>r) 8/j|=Q,5
data[cur]=temp[i1++]; ` Ny(S2
else if(temp[i1] data[cur]=temp[i1++]; ^@8XJ[C,_
else `},:dDHI
data[cur]=temp[i2++]; :k?`gm$
} ;/kd.Q
} @k;65'"Q
VD&wO'U
} @yb'h`f]
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改进后的归并排序: ?bM%#x{e
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package org.rut.util.algorithm.support; : 8>zo
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import org.rut.util.algorithm.SortUtil; |~%RSS~b*
E8Kk)7
/** y "+'4:_
* @author treeroot j;uUM6
* @since 2006-2-2 > "rM\ Q
* @version 1.0 @mZK[*Ak<*
*/ nI?*[y}
public class ImprovedMergeSort implements SortUtil.Sort { @d{}M)6\!
$!. [R}
private static final int THRESHOLD = 10; r4[=pfe25
1lIs jBo g
/* K_Y{50#
* (non-Javadoc) X%s5D&gr
* &Qda|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]\K?%z
*/ l=9D!64
public void sort(int[] data) { tH;9"z# ~
int[] temp=new int[data.length]; <2@t~9
mergeSort(data,temp,0,data.length-1); 6R^F^<<
} l-W)?d
9~j"6wS
private void mergeSort(int[] data, int[] temp, int l, int r) { i_m&qy<v
int i, j, k; V0m1>{
int mid = (l + r) / 2; M:OZWYQ
if (l == r) <-N eusx%
return; xib}E[-l#
if ((mid - l) >= THRESHOLD) p'^}J$
mergeSort(data, temp, l, mid); yB7si(,1>
else =%I[o=6
insertSort(data, l, mid - l + 1); U%r{{Q1
if ((r - mid) > THRESHOLD) 2X' H^t]7
mergeSort(data, temp, mid + 1, r); )MIw/
else HLz<C
insertSort(data, mid + 1, r - mid); ha|2u(4
X~m57bj
for (i = l; i <= mid; i++) { :CM-I_6
temp = data; p&Nav,9x
} +&"W:Le:
for (j = 1; j <= r - mid; j++) { &u|t{C#0
temp[r - j + 1] = data[j + mid]; =.S2gO >
} 2u_=i$xW
int a = temp[l]; gYbvCs8O!
int b = temp[r]; wT+60X'
for (i = l, j = r, k = l; k <= r; k++) { YhglL!pC
if (a < b) { l2W+VBn6
data[k] = temp[i++]; }` `oojz
a = temp; OO/>}? ob
} else { zx"EAF{
data[k] = temp[j--]; Bi fI.2|
b = temp[j]; D_<B^3w)
} JfJ ln[
} +1qvT_
} 'p[6K'Uq5
PJKY$s.
/** *vBhd2HO
* @param data o|n;{zT"
* @param l J%ws-A?6rN
* @param i Hh](n<Bs
*/ kKbbsB
private void insertSort(int[] data, int start, int len) { H4v%$R;K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `4@`G:6BL
} :,H_ e! X
} .Sw4{m[g
} </<z7V,{
} n@@tO#!\
tZ=|1lM
堆排序： /Tl ybSC1
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package org.rut.util.algorithm.support; O+XQP!T
HWoMzp5="3
import org.rut.util.algorithm.SortUtil; &flcJ`
~O./A-l
/** M[b~5L+S
* @author treeroot (1{OQ0N+x
* @since 2006-2-2 A+Je?3/.
* @version 1.0 ocW`sE?EED
*/ 9|>y[i
public class HeapSort implements SortUtil.Sort{ ,9=P=JH
=fBr2%qK
/* (non-Javadoc) ,t1s#*j\!q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3S^Qo9S
*/ YA8/TFu<_
public void sort(int[] data) { Tz&cm=
MaxHeap h=new MaxHeap(); BI#(L={5
h.init(data); ?b^<Tny
for(int i=0;i h.remove(); `,GFiTPd
System.arraycopy(h.queue,1,data,0,data.length); K24y;968
} Q4ii25]*
IP !zg|c,
private static class MaxHeap{ IMSm
QKz2ONV=)
void init(int[] data){ Q(8W5Fb?
this.queue=new int[data.length+1]; c$A}mL_
for(int i=0;i queue[++size]=data; e!i.u'z
fixUp(size); =|-xj h
} F+xMXBD@>*
} bg4VHT7?>)
jAt65a
private int size=0; `b@"GOr
5hCfi
private int[] queue; mn<ea&
*LmzGF|
public int get() { U_B`SS
return queue[1]; A^c5CJ_
} ; zy;M5l5.
_x#r,1V+D
public void remove() { b[;3y/X
SortUtil.swap(queue,1,size--); dj0Du^v4
fixDown(1); t.O4-+$ig
} \BsvUGd
file://fixdown WWTJ%Rd|
private void fixDown(int k) { yNx"Ey dk`
int j; XnvaT(k7Y
while ((j = k << 1) <= size) { 8{Svax(
if (j < size %26amp;%26amp; queue[j] j++; I#p-P)Q%S
if (queue[k]>queue[j]) file://不用交换 )./'RE+(k
break; A,ao2)
SortUtil.swap(queue,j,k); Q([g1?F9*
k = j; QPF[D7\
} |4Q><6"G
} ',RR*{I
private void fixUp(int k) { +n`^W(
while (k > 1) { yFP#z5G
int j = k >> 1; .Qj`_q6=
if (queue[j]>queue[k]) 0Zl1(;hx@
break; i%B$p0U<
SortUtil.swap(queue,j,k); tQ?}x#J
k = j; e''Wm.>g(+
} ':]w
} w@f_TG"Vt
zjJyc?
} WUi7~Ei}
aR;Q^YJ+a
} ?at~il$z'
PsD]gN5"
SortUtil： sAc)X!}
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package org.rut.util.algorithm; BQ&h&57K
/L[:C=u
import org.rut.util.algorithm.support.BubbleSort; }`^<ZNkb/
import org.rut.util.algorithm.support.HeapSort; `}Hnj*
import org.rut.util.algorithm.support.ImprovedMergeSort; 1$2Rs-J
import org.rut.util.algorithm.support.ImprovedQuickSort; kQBVx8Uq]
import org.rut.util.algorithm.support.InsertSort; <~8W>Y\m
import org.rut.util.algorithm.support.MergeSort; tv|=`~Y
import org.rut.util.algorithm.support.QuickSort; )ZmE"
import org.rut.util.algorithm.support.SelectionSort; +V\NMW4d
import org.rut.util.algorithm.support.ShellSort; )'<zC
bm7$DKp#
/** r*3XM{bZ/@
* @author treeroot 'XQv>J
* @since 2006-2-2 DwTZ<H4
* @version 1.0 p-/x Md
*/ pV-.r-P
public class SortUtil { qC|re!K
public final static int INSERT = 1; aA yFu_
public final static int BUBBLE = 2; ->#7_W
public final static int SELECTION = 3; T@HozZ
public final static int SHELL = 4; n:!J3pR
public final static int QUICK = 5; I2l'y8)d
public final static int IMPROVED_QUICK = 6; a+BA~|u^
public final static int MERGE = 7; Em.?
public final static int IMPROVED_MERGE = 8; W]*wxzf!5z
public final static int HEAP = 9; & ='uAw
da^9Fb
public static void sort(int[] data) { ta4<d)nB
sort(data, IMPROVED_QUICK); Vis?cuU/
} E0h!%/+-L
private static String[] name={ kI;^V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bo"I:)n;
}; Tp6ysjao
},L[bDOV07
private static Sort[] impl=new Sort[]{ f!Ie
new InsertSort(), r#~6FpFVK^
new BubbleSort(), `4p9K
new SelectionSort(), BzUx@,
new ShellSort(), lJ,s}l7
new QuickSort(), |O+binq
new ImprovedQuickSort(), \%^3Izsc
new MergeSort(), 4'8.f5
new ImprovedMergeSort(), / q!&I
new HeapSort() @<sP1`1
}; Z,&ywMm/G
5LK>n-
public static String toString(int algorithm){ ]-`{kX
return name[algorithm-1]; g?+P&FL#I
} ?{dno=
+]_} \
public static void sort(int[] data, int algorithm) { [(K^x?\Y0'
impl[algorithm-1].sort(data); dk ?0r
} ,J#5Y.
x[kdQj2[&
public static interface Sort { zC^Ib&gm>,
public void sort(int[] data); g/yXPzLU
} cK } Qu
D.GSl
public static void swap(int[] data, int i, int j) { u!S{[7 FY
int temp = data; A|+{x4s`
data = data[j]; 8YJ({ Ou_
data[j] = temp; Y#5S;?bR
} ]_,~q@r$
} +$'/!vN