[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; $YGIN7_Gg
} U3|&Jee
int i1=l; y%IG:kZ,
int i2=mid+1; @(,{_c]
for(int cur=l;cur<=r;cur++){ '^oGDlkr H
if(i1==mid+1) ahi57r[
data[cur]=temp[i2++]; C@UJOB
else if(i2>r) 6PQJgki
data[cur]=temp[i1++]; z5yb$-j
else if(temp[i1] data[cur]=temp[i1++]; ;*g*DIR
else H6PXx
data[cur]=temp[i2++]; !AD0-fZ
} TA@tRGP>
} )(?UA$"
}KaCf,O
} {Z?$Co^R
X4P}aC
改进后的归并排序: UU;-q_H6
f?>-yMR|
package org.rut.util.algorithm.support; [nN\{"~O
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import org.rut.util.algorithm.SortUtil; r_V2 J{B
EYJi6#
/** Ot2zhR )
* @author treeroot mOz&6T<|
* @since 2006-2-2 p'%: M
* @version 1.0 ~*PK080N}
*/ K5)yM @cq
public class ImprovedMergeSort implements SortUtil.Sort { lEyG9Xvi
WK_y1(v>
private static final int THRESHOLD = 10; GEe 0@q#YA
m_E[bDON
/* ,3J`ftCV
* (non-Javadoc) R!_8jD:$
* rKy-u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V$-~%7@>;9
*/ G1?0Q_RN
public void sort(int[] data) { I4o=6ts
int[] temp=new int[data.length]; ,>QMyI hv
mergeSort(data,temp,0,data.length-1); *b6I%MZn
} dIk8TJ
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6m-:F.k1(
int i, j, k; rt3f7 s*
int mid = (l + r) / 2; f- k|w%R@
if (l == r) { /F rs*AF
return; Mf;|z0UX
if ((mid - l) >= THRESHOLD) Uaus>Frx.T
mergeSort(data, temp, l, mid); }:RT,<
else %EJ\|@N:
insertSort(data, l, mid - l + 1); pT3X/ra
if ((r - mid) > THRESHOLD) {w |dM#
mergeSort(data, temp, mid + 1, r); &sZ9$s:(^
else zldfRo\wl
insertSort(data, mid + 1, r - mid); nL":0!DTRD
!y qa?\v9
for (i = l; i <= mid; i++) { mX<Fuu}E*Z
temp = data; AK@`'$
} m{bZRkt
for (j = 1; j <= r - mid; j++) { DD/>{kff
temp[r - j + 1] = data[j + mid]; _4.]A3;}
} >op:0on]}
int a = temp[l]; c|\ZRBdI
int b = temp[r]; \uU=O )
for (i = l, j = r, k = l; k <= r; k++) { (b/A|hl
if (a < b) { .)"_Q/q
data[k] = temp[i++]; S1 EEASr!}
a = temp; [5?4c'Ev
} else { W.#}qK" q
data[k] = temp[j--]; G%P>Ag
b = temp[j]; Hhe{+W@~
} yyY~ *Le
} i}/e}s<-6
} -y&v9OC2-
E ;BPN
/** sJ))<,e5I
* @param data nabBU4;h
* @param l 99l>CYXd
* @param i /~3N@J
*/ y*VQ]aJ
private void insertSort(int[] data, int start, int len) { ]>R`;"(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JmU<y
} g.B%#bfg
} j4~7akG
} m,W) N9 M
} >lD;0EN
(O)\#%,@R
堆排序： Q0zW ]a
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package org.rut.util.algorithm.support; 7|&e[@B
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import org.rut.util.algorithm.SortUtil; B :.@Qi^
GXDC@+$14
/** mu6039qy
* @author treeroot s<[A0=LH
* @since 2006-2-2 ,O:EX0
* @version 1.0 :a_BD
*/ ?z2jk
public class HeapSort implements SortUtil.Sort{ r\$6'+Si
_iG2J&1'L
/* (non-Javadoc) tigT@!`$Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J>rka]*
*/ 9R9__w;
public void sort(int[] data) { Y3#Nux%
MaxHeap h=new MaxHeap(); 6g5PM4\
h.init(data); QWrIa1.JC
for(int i=0;i h.remove(); NH7`5mF$
System.arraycopy(h.queue,1,data,0,data.length); A/q2g7My
} ifXW
!M
private static class MaxHeap{ Ye9Y^+-
x(L(l=^"
void init(int[] data){ IByf_E;r
this.queue=new int[data.length+1]; _fcS>/<a
for(int i=0;i queue[++size]=data; "j{i,&Y$_
fixUp(size); nz4<pvC,*
} `NBbTQtgO
} ldA!ou7
QX[Djz0H8
private int size=0; n[!;yO
Zy^=fM
private int[] queue; DH 6q7"@
n;wwMMBM
public int get() { yL0f1nS
return queue[1]; f|OI`
} Vclr)}5
KQ&Y2l1*>>
public void remove() { 3sH\1)Zz
SortUtil.swap(queue,1,size--); g>so R&*
fixDown(1); 9YB2e84j
} m#tpbFAsc
file://fixdown >lrhHU
private void fixDown(int k) { 8zY)J#
int j; .*BA 1sjE
while ((j = k << 1) <= size) { #~L!pKM
if (j < size %26amp;%26amp; queue[j] j++; 5sCFzo<=vh
if (queue[k]>queue[j]) file://不用交换 /Rj#sxtdw
break; }g~g50ci
SortUtil.swap(queue,j,k); Kx~$Bor_!
k = j; ZWO)tVw9G
} ; e@gO
} ipobr7G.SD
private void fixUp(int k) { i3#'*7f%j
while (k > 1) { 8".2)W4*
int j = k >> 1; 7paUpQit
if (queue[j]>queue[k]) EIr@g
break; _a](V6
SortUtil.swap(queue,j,k); @Mm/C?#*O
k = j; jpRBER_X
} *i^`Dw^~y
} h4_b!E@
[)^mBVht
} GF8 -_X
gH[,Xx?BN!
} Ojq]HM6f
zJ+3g!
SortUtil： mzWP8Hlw
\<~}o I
package org.rut.util.algorithm; N2BI_,hI1
Z|G/^DK!
import org.rut.util.algorithm.support.BubbleSort; Us,)]W.S
import org.rut.util.algorithm.support.HeapSort; =!BobC- [b
import org.rut.util.algorithm.support.ImprovedMergeSort; afHaB/t{R
import org.rut.util.algorithm.support.ImprovedQuickSort; [#Y' dFQ
import org.rut.util.algorithm.support.InsertSort; ciudRK63M
import org.rut.util.algorithm.support.MergeSort; uRE*%d>
import org.rut.util.algorithm.support.QuickSort; )P?IqSEA%
import org.rut.util.algorithm.support.SelectionSort; re^Hc(8M
import org.rut.util.algorithm.support.ShellSort; >c4/?YV
'cV?i&;
/** yhpz5[AuO
* @author treeroot rEdY>\'
* @since 2006-2-2 `9Yn0B.
* @version 1.0 (luKn&826
*/ w&Y{1rF>
public class SortUtil { +`B'r '
public final static int INSERT = 1; E V2 )
public final static int BUBBLE = 2; @5.e@]>ZM
public final static int SELECTION = 3; MPIlSMe
public final static int SHELL = 4; X8i(~ B
public final static int QUICK = 5; 5+- I5HX|~
public final static int IMPROVED_QUICK = 6; ]N^*tO
public final static int MERGE = 7; YuQ~AE'i
public final static int IMPROVED_MERGE = 8; 7G<t"'
public final static int HEAP = 9; y+9h~,:A
w\Mnu}<e$
public static void sort(int[] data) { ;#1Iiuh
sort(data, IMPROVED_QUICK); WkP +r9rT
} DIaYo4
private static String[] name={ ~>Kq<]3~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nPN?kO=]
}; JN4fPGbV
{^}0 G^
private static Sort[] impl=new Sort[]{ ]E3<UR
new InsertSort(), :=Kx/E:1
new BubbleSort(), n((vY.NDV
new SelectionSort(), $bvJTuw
new ShellSort(), ,lt8O.h-l
new QuickSort(), t9^A(Vh"-
new ImprovedQuickSort(), uLQ
new MergeSort(), cK@jmGj+
new ImprovedMergeSort(), xyA-P& N
new HeapSort() /6KIl
}; krB'9r<wa`
x[(?#
public static String toString(int algorithm){ ,+`HQdq
return name[algorithm-1]; rY0u|8.5Q
} + H_WlYg-
+*}{`L- :
public static void sort(int[] data, int algorithm) { ; A,#;%j
impl[algorithm-1].sort(data); /KCPpERk{
} Nc)J18
En6H%^d2
public static interface Sort { n6MM5h/#r
public void sort(int[] data); `_vB+a
} V0*3;n
c~=B0K-
public static void swap(int[] data, int i, int j) { =JS;;PzX[
int temp = data; (;_FIUz0
data = data[j]; 'zZcn" +!
data[j] = temp; d$W
} -%CoWcGP
} (:pq77