[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; "Cxj_V@\
} 16eP7s
int i1=l; [dLc+h1{B
int i2=mid+1; `:Wyw<^
for(int cur=l;cur<=r;cur++){ cd,'37pZ
if(i1==mid+1) ESoqmCJjb:
data[cur]=temp[i2++]; "JmbYb#Z
else if(i2>r) yxx_%9X
data[cur]=temp[i1++]; 4w%hvJ
else if(temp[i1] data[cur]=temp[i1++]; z)KoK`\mE"
else h(nE)j
data[cur]=temp[i2++]; s[{8:Px
} XOqHzft h6
} dEXhn
A4l"^dZc
} gmu.8
b/*QV0(
改进后的归并排序: .T8^>z1/\F
,B;mG]_
package org.rut.util.algorithm.support; `2U,#nZ 4
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import org.rut.util.algorithm.SortUtil; chD7^&5]
fXnTqKAfu6
/** _Q^jk0K8ga
* @author treeroot z|AknEE,
* @since 2006-2-2 &/uakkS
* @version 1.0 U[;ECw@
*/ exSwx-zxI
public class ImprovedMergeSort implements SortUtil.Sort { TuCHD~rb
jS3@Z?x?*
private static final int THRESHOLD = 10; o/ \o-kC}
`::j\3B&Y-
/* Us "G X_
* (non-Javadoc) #q34>}O< O
* 6T~+vT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1*9Yy~w
*/ (AA@sN
public void sort(int[] data) { xF) .S@
int[] temp=new int[data.length]; .Sw4{m[g
mergeSort(data,temp,0,data.length-1); </<z7V,{
} p({|=+bl
`,pBOh|'
private void mergeSort(int[] data, int[] temp, int l, int r) { fU.hb%m)Q\
int i, j, k; P/~dY[6m
int mid = (l + r) / 2; 5r8 ["
if (l == r) G2[2y-Rv
return; 4ybOK~z
if ((mid - l) >= THRESHOLD) HSG9|}$
mergeSort(data, temp, l, mid); $(J)F-DB i
else wAR:GO'n
insertSort(data, l, mid - l + 1); .wm<l:
if ((r - mid) > THRESHOLD) ZPM7R3%V)z
mergeSort(data, temp, mid + 1, r); T06w`'aL
else <5]_u:
insertSort(data, mid + 1, r - mid); 4mBM5Tv
UlN}SddI9
for (i = l; i <= mid; i++) { /Y\q&}
temp = data; -{eiV0<^
} 7je1vNs
for (j = 1; j <= r - mid; j++) { T;3~teVYB
temp[r - j + 1] = data[j + mid]; c?xeBC1-
} vA*NJ%&`
int a = temp[l]; ZQz;EV!
int b = temp[r]; {XhpxJ__
for (i = l, j = r, k = l; k <= r; k++) { !5m~qet.
if (a < b) { h*P0;V`UX
data[k] = temp[i++]; +f]I7e:qp
a = temp; ?\Y7]_]/
} else { 0x'Fi2=`
data[k] = temp[j--]; V/OW=WCzN
b = temp[j]; R'K /\
} ~c1~)QzZ
} u_WW uo
} ;XYfw)
3kJSz-_M
/** T^xp2cZ
* @param data H'EBe;ccM
* @param l =8r,-3lC;
* @param i 5hCfi
*/ mn<ea&
private void insertSort(int[] data, int start, int len) { *LmzGF|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U_B`SS
} T?__
} ~;I{d7z,;
} mOjl0n[To]
} i3Nt?FSN
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堆排序： 0XIrEwm@%
gAi}"};
package org.rut.util.algorithm.support; r:^`005
hW cM.
import org.rut.util.algorithm.SortUtil; NX+ eig</-
;rF:$37^
/** gY=+G6;=<
* @author treeroot 6d 8n1_
* @since 2006-2-2 N)z] F9Kg
* @version 1.0 93`
*/ QPF[D7\
public class HeapSort implements SortUtil.Sort{ oU 8o;zk0
Ox/va]e7"
/* (non-Javadoc) K&Q0]r?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v:j4#pEWD
*/ P|)SXR
public void sort(int[] data) { C$B?|oUJc
MaxHeap h=new MaxHeap(); ;#"`]khd
h.init(data); Xg"Mjmr
for(int i=0;i h.remove(); LyXABQ]
System.arraycopy(h.queue,1,data,0,data.length); 1hp@.Fv
} @1[LD[<
WHF:>0B
private static class MaxHeap{ aR;Q^YJ+a
r?2C%GI`
void init(int[] data){ X4*/h$48 w
this.queue=new int[data.length+1]; C[$<7Mi|;
for(int i=0;i queue[++size]=data; l}c<eEfOy"
fixUp(size); `wG&Cy]v
} %nc+VL4
} cKy%0oTla
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private int size=0; 7~`6~qg.
ae1fCw3k
private int[] queue; ]R]X#jm
9p$q@Bc
public int get() { `^N;%[c`z
return queue[1]; .g&BA15<F6
} E3KPJ`=!*"
,9M \`6
public void remove() { N4mQN90t
SortUtil.swap(queue,1,size--); aH$*Ue@Q
fixDown(1); DwTZ<H4
} p-/x Md
file://fixdown pV-.r-P
private void fixDown(int k) { qC|re!K
int j; aA yFu_
while ((j = k << 1) <= size) { d ly 0874
if (j < size %26amp;%26amp; queue[j] j++; &k{@:z
if (queue[k]>queue[j]) file://不用交换 AU$5"kBE
break; %I=J8$B]f
SortUtil.swap(queue,j,k); Y2D)$
k = j; {5z?5i ?D
} 9hp0wi@W}
} pcl_$2_
private void fixUp(int k) { YGn:_9
while (k > 1) { 02S(9^=
int j = k >> 1; 2Uk8{d
if (queue[j]>queue[k]) <*5D0q#~"
break; 3 \WdA$Wx
SortUtil.swap(queue,j,k); >) :d38M
k = j; WK^qYfq|
} 1!NaOfP;@
} dX3>j{_
%E!0,y,:
} fu&]t8MJC
5Np.&
} XZT( :(
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SortUtil： [E/3&3
Mo<p+*8u:
package org.rut.util.algorithm; %`\{Nxk
nz&JG~Qfm
import org.rut.util.algorithm.support.BubbleSort; J/*[wj
import org.rut.util.algorithm.support.HeapSort; e O}mZN
import org.rut.util.algorithm.support.ImprovedMergeSort; &\K#UVDyhh
import org.rut.util.algorithm.support.ImprovedQuickSort; Bms?`7}N
import org.rut.util.algorithm.support.InsertSort; ,?f(~<Aj
import org.rut.util.algorithm.support.MergeSort; sR0nY8@F
import org.rut.util.algorithm.support.QuickSort; zj)[Sntn?
import org.rut.util.algorithm.support.SelectionSort; DpR%s",Q
import org.rut.util.algorithm.support.ShellSort; i!nl%%
%?$"oWmenS
/** eK@Y] !lz
* @author treeroot p5'\< gQ
* @since 2006-2-2 u60l-
* @version 1.0 %~[F^
*/ #WG(V%f]
public class SortUtil { OWkK]O
public final static int INSERT = 1; {gn[ &\
public final static int BUBBLE = 2; jHZ<Gc
public final static int SELECTION = 3; @'y"D
public final static int SHELL = 4; $7*Ml)H!9
public final static int QUICK = 5; m1hf[cg
public final static int IMPROVED_QUICK = 6; +Snjb0
public final static int MERGE = 7; :4Vt
public final static int IMPROVED_MERGE = 8; g<-cHF
public final static int HEAP = 9; }A;Xd/,'r
334*nQ
public static void sort(int[] data) { 'mM5l*{
sort(data, IMPROVED_QUICK); !1_:nD
} ~}116K
private static String[] name={ .PxM #;i2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _Owz%
}; nNKL{Hp
3^a"$VW1
private static Sort[] impl=new Sort[]{ L$Q+R'
new InsertSort(), 1&<@(S<
new BubbleSort(), VQ;=-95P
new SelectionSort(), Xz@>sY>Jc
new ShellSort(), "8I4]'
new QuickSort(), T_dd7Ym'8
new ImprovedQuickSort(), 8K/lpqw
new MergeSort(), D.e*IP1R
new ImprovedMergeSort(), {m?x},
new HeapSort() $} Myj'`r
}; |+bG~~~%j
3PGyqt(
public static String toString(int algorithm){ (!(bysi9
return name[algorithm-1]; F*=RP$sj
} B+LNDnjO]
V_kE"W)
public static void sort(int[] data, int algorithm) { sFTIRVXN,
impl[algorithm-1].sort(data); jj2UUQ|
} 4Ojw&ys@V
U{Z>y?V/
public static interface Sort { \v_C7R;&
public void sort(int[] data); ,d+mT^jN
} 2vC=.1k
2 *$n?
public static void swap(int[] data, int i, int j) { K&h6#[^\d
int temp = data; ihVQ,Cth
data = data[j]; =!X4j3Cv
data[j] = temp; ZIp=JR8o$
} EUkNh>U?
} =)8Ct