[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; Un{9reX5
} LABLT;c
int i1=l; yn KgNi
int i2=mid+1; 9vJ'9Z2\
for(int cur=l;cur<=r;cur++){ ]B9Ut&mF;
if(i1==mid+1) #mH4\s
data[cur]=temp[i2++]; ec"+Il
else if(i2>r) p|VgtQ/)%
data[cur]=temp[i1++]; 4'U #<8
else if(temp[i1] data[cur]=temp[i1++]; Wf5ohXm>
else S'%!KGVe
data[cur]=temp[i2++]; R^tDL
} VT5o#NR{R
} uI+^8-HZ;
IjnO2X
} (xlAS
F!~oJ
改进后的归并排序: QOKE9R#Y
_.K<#S
package org.rut.util.algorithm.support; i2m+s;
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import org.rut.util.algorithm.SortUtil; <ly.l]g
[E4#|w
/** qn#f:xltu
* @author treeroot Nt P=m @
* @since 2006-2-2 I9E]zoj8
* @version 1.0 0v'FE35~s
*/ 'I1^70bB
public class ImprovedMergeSort implements SortUtil.Sort { fv?vfI+m
GJbU1k]
private static final int THRESHOLD = 10; 0ZjinWkR[
SKrkB~%z
/* wEMg~Hh
* (non-Javadoc) 7~7_T#dTh
* yfCdK-9+B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x/xd
*/ FvV:$V|
public void sort(int[] data) { rT{+ h}vO
int[] temp=new int[data.length]; Z{spo=
mergeSort(data,temp,0,data.length-1); [{cMEV&
} OAd}#R\U
:/941?%M
private void mergeSort(int[] data, int[] temp, int l, int r) { g=_@j`
int i, j, k; J:JkX>n%k=
int mid = (l + r) / 2; "I)`gy&
if (l == r) MPF;P&6
return; =r1@?x
if ((mid - l) >= THRESHOLD) 1"P^!N
mergeSort(data, temp, l, mid); L[cl$pYV
else pG(%yIiAi
insertSort(data, l, mid - l + 1); GV(@(bI*
if ((r - mid) > THRESHOLD) )H`1CcT
mergeSort(data, temp, mid + 1, r); 6[l{@*r"
else ELqpIXq#
insertSort(data, mid + 1, r - mid); P*zOt]T
X!ad~bt
for (i = l; i <= mid; i++) { 92)e/t iP
temp = data; ~Bs=[TNd[
} @h";gN
for (j = 1; j <= r - mid; j++) { n*vzp?+Y
temp[r - j + 1] = data[j + mid]; Rw#4 |&
} +4*jO5EZ
int a = temp[l]; #gd`X|<Ch
int b = temp[r]; KG8Km
for (i = l, j = r, k = l; k <= r; k++) { >)p8^jX
if (a < b) { ^YwTO/Q|
data[k] = temp[i++]; |Wzdu2T
a = temp; ^E349c-|
} else { %^ z##7^
data[k] = temp[j--]; n#lZRwhq
b = temp[j]; ^-GzWT
} M5>cYVG
} t?<pyw $
} 7"0l>0 \
k x26nDT(
/** Y}Gf%Xi,
* @param data YdNmnB%J
* @param l |Xv]s61
* @param i eJ O+MurO
*/ ^CWxYDG*
private void insertSort(int[] data, int start, int len) { XlGDv*d:#d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); haW*W=kv)
} eod-N}o
} % A8dO+W
} /3ty*LQT
} B6gn(w3
!w}cKm
堆排序： l'0fRQc
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package org.rut.util.algorithm.support; Nn]|#lLP
<W<>=vDzyE
import org.rut.util.algorithm.SortUtil; Wz]ny3K[.
896oz>
/** N(@B3%H2/J
* @author treeroot #`(-Oj2hH
* @since 2006-2-2 MX\v2["FoV
* @version 1.0 zv}3Sl@
*/ 3}lT"K
public class HeapSort implements SortUtil.Sort{ :kz"Wya.
Q"2J2211
/* (non-Javadoc) 9pJk.Np0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M8HHyV[AmC
*/ E|K~WO]>o
public void sort(int[] data) { DcL;7IT
MaxHeap h=new MaxHeap(); suP/I?4'@
h.init(data); u^Sa{Jk=
for(int i=0;i h.remove(); qe{:9
System.arraycopy(h.queue,1,data,0,data.length); |}Wm,J
} B(TE?[ #
#2qDn^s
private static class MaxHeap{ oYn|>`+6:y
Kk?C
void init(int[] data){ ;('(Yn7~
this.queue=new int[data.length+1]; \sZT[42
for(int i=0;i queue[++size]=data; ;#jE??E/:
fixUp(size); {i09e1
} R%\K<#^\
} ^< o"3?
z;#]xCV
private int size=0; y6C3u5`
N& 683z
private int[] queue; 5U!yc7eBI/
n?=d)[]
public int get() { B{ptP4As-
return queue[1]; VwKo)zH
} rMy(NAo_
zs<2Ozv
public void remove() { d=v{3*a_4,
SortUtil.swap(queue,1,size--); =Mby;wQ?|
fixDown(1); ;Or]x?-
} q{:]D(
file://fixdown nhZ^`mP
private void fixDown(int k) { v3q.,I_
int j; nS5g!GYY,k
while ((j = k << 1) <= size) { b|KlWt'
if (j < size %26amp;%26amp; queue[j] j++; f0d*%
if (queue[k]>queue[j]) file://不用交换 EO: VH
break; +8#hi5e
SortUtil.swap(queue,j,k); 9\J.AAk~/
k = j; <<5x"W(,
} aViZKps`m
} &oXN*$/dlJ
private void fixUp(int k) { Z| f~
while (k > 1) { _a`J>~$
int j = k >> 1; _d`)N
if (queue[j]>queue[k]) &u}]3E'-k
break; :*6#(MX
SortUtil.swap(queue,j,k); ,u&K(Z%
k = j; |Y")$pjz
} "gCqb;^
} |_GESpoHH
fp`k1Uq@
} XJI ff$K
h:3^FV&#
} :)eU)r"s4
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SortUtil： }3DZ`8u
i+&o%nK2
package org.rut.util.algorithm; =)Z~w`
$[1J[eY*
import org.rut.util.algorithm.support.BubbleSort; s-"oT=
import org.rut.util.algorithm.support.HeapSort; (l]_0-Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ?[z@R4at
import org.rut.util.algorithm.support.ImprovedQuickSort; %m5&Y01
import org.rut.util.algorithm.support.InsertSort; r 1x2)
import org.rut.util.algorithm.support.MergeSort; $FM:8^
import org.rut.util.algorithm.support.QuickSort; A]_5O8<buW
import org.rut.util.algorithm.support.SelectionSort; pHKGK7 S-
import org.rut.util.algorithm.support.ShellSort; (S)jV0
(ibj~g?U,
/** ]r\d 5
* @author treeroot Gjka %
* @since 2006-2-2 !0DOj["
* @version 1.0 MLk%U 4
*/ _>=QZ`!r
public class SortUtil { 'U/X<LCl
public final static int INSERT = 1; 'irHpN6n
public final static int BUBBLE = 2; nKu)j3o`
public final static int SELECTION = 3; sG K7Uy
public final static int SHELL = 4; @||GMA+|
public final static int QUICK = 5; UJ^MS4;I3
public final static int IMPROVED_QUICK = 6; 8^2E77s4U
public final static int MERGE = 7; dZIruZ)x
public final static int IMPROVED_MERGE = 8; .;,` bH0
public final static int HEAP = 9; g* DBW,
N`xXH
public static void sort(int[] data) { 746['sf4c
sort(data, IMPROVED_QUICK); tYST&5Kh~
} |Zm'!-_
private static String[] name={ FesUE_L2$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <[Y@<
}; 4E 32DG*
t}x^*I$*
private static Sort[] impl=new Sort[]{ mVVL[z2+
new InsertSort(), sOb=+u$$9
new BubbleSort(), m(rd\3d
new SelectionSort(), ^W*3S[-`g
new ShellSort(), trm-&e7q?;
new QuickSort(), 7:Be.(a
new ImprovedQuickSort(), x$+g/7*
new MergeSort(), 5q95.rw
new ImprovedMergeSort(), <F6LC_
new HeapSort() A=bBI>GEYP
}; W>cHZ. _
:vo#(
public static String toString(int algorithm){ kB3@;z:
return name[algorithm-1]; O&@pi-=o
} ay`A Gr
{T'M4y=)i
public static void sort(int[] data, int algorithm) { _<m yM2z
impl[algorithm-1].sort(data); yDmx)^En
} \l71Q/y6u`
H*R4AE0
public static interface Sort { XZH\HK)K-]
public void sort(int[] data); }Jm~b9j
} D\-D~G]x
)FSa]1t;x
public static void swap(int[] data, int i, int j) { DC+l3N
int temp = data; LnlDCbF;!
data = data[j]; * G0I2
data[j] = temp; JS#AoPWA
} G/y;o3/[Z
} E;-*LT&{