[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; NXSjN~aG2
} (=t41-l
int i1=l; |0xP'(
int i2=mid+1; OXD*ZKi8
for(int cur=l;cur<=r;cur++){ BT*{&'\/
if(i1==mid+1) %hN7K
data[cur]=temp[i2++]; Y20T$5{#
else if(i2>r) ]qO*(m:}o
data[cur]=temp[i1++]; OSIf>1
else if(temp[i1] data[cur]=temp[i1++]; t 4>\;
else %eW2w@8]
data[cur]=temp[i2++]; ^17i98w
} 't'2z
} o>e-M
h_\OtoRa
} mV#U=zqb!S
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改进后的归并排序: 7[It
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package org.rut.util.algorithm.support; ^|ul3_'?
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import org.rut.util.algorithm.SortUtil; CM4#Nn=i~
- sL4tMP
/** !;M5.Y1j&"
* @author treeroot wH]Y1 m
* @since 2006-2-2 tqzr+
* @version 1.0 ~vB dq Yj
*/ v{oHC4
public class ImprovedMergeSort implements SortUtil.Sort { PXo^SHJ+gt
uL |O<
private static final int THRESHOLD = 10; ASULg{
V~]&1
/* ^EcwY- Qr
* (non-Javadoc) u$ff %`E
* ,Y`TP4Ip
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w 3$9
*/ v?s%qb=T
public void sort(int[] data) { !n|4w$t"V
int[] temp=new int[data.length]; e~PAi8B5
mergeSort(data,temp,0,data.length-1); a3C\?5
} /kNSB;
QS%t:,0lp
private void mergeSort(int[] data, int[] temp, int l, int r) { z@U5
int i, j, k; UNyk, #4
int mid = (l + r) / 2; To =JE}jzo
if (l == r) =PYS5\k
return; CSlPrx2\
if ((mid - l) >= THRESHOLD) |Pq z0n=v
mergeSort(data, temp, l, mid); ]:svR@E
else O7z5,-
insertSort(data, l, mid - l + 1); z,c=."<z
if ((r - mid) > THRESHOLD) H-t"Z}
mergeSort(data, temp, mid + 1, r); s7s@!~
else lX/:e=
insertSort(data, mid + 1, r - mid); wG X\ub#!
Y{OnW98
for (i = l; i <= mid; i++) { Tzr'3m_
temp = data; :&BE-f
} F5%IsAH
for (j = 1; j <= r - mid; j++) { AYv7-!Yk
temp[r - j + 1] = data[j + mid]; Ypwn@?xeP
} ]:.9:RmEV
int a = temp[l]; x\5v^$
int b = temp[r]; %s ">:
for (i = l, j = r, k = l; k <= r; k++) { :|\)=4
if (a < b) { w:/QB-`%
data[k] = temp[i++]; ky I~
a = temp; >DoP2]
} else { yeIcQ%
data[k] = temp[j--]; li9>zjz
b = temp[j]; S)x5.vo^
} MR/gLm(8(
} [WO>}rGw4
} ')>D*e
_zDf8hy
/** Xk}\-&C7
* @param data *Ke\Yb
* @param l Uf#9y182*c
* @param i 9YY*)5eyD
*/ =i>i,>bv
private void insertSort(int[] data, int start, int len) { .4XX )f5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !#dp[,nk
} `u$lSGl
} Yz? 8n
} \-CL}Z}S
} .x][ _I>
l09DH+
堆排序： SHRn$<
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package org.rut.util.algorithm.support; Lc_cB`
);d"gv(]D
import org.rut.util.algorithm.SortUtil; 4rUOk"li
aRcVoOq
/** Y7<(_p7
* @author treeroot Y?\PU{O
* @since 2006-2-2 UnOcw
* @version 1.0 K[l5=)G0L
*/ MY l9 &8
public class HeapSort implements SortUtil.Sort{ mT,#"k8
t(p}0}Pp
/* (non-Javadoc) V z-]H]MW,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [}`-KpV!;
*/ Dr5AJ`y9A
public void sort(int[] data) { >\[|c
MaxHeap h=new MaxHeap(); G#j~8`3X
h.init(data); 'mk_s4J
for(int i=0;i h.remove(); $y,tR.5.)[
System.arraycopy(h.queue,1,data,0,data.length); Zw_'u=r >
} a([8r- zP
U\i7'9w]3
private static class MaxHeap{ 70.Tm#qh
Ch73=V
void init(int[] data){ g9gi7.'0
this.queue=new int[data.length+1]; remRmY?
for(int i=0;i queue[++size]=data; T+41,
fixUp(size); @k)[p+)E
} YRu#JYti
} ,$Xhwr
uLSuY}K0
private int size=0; Y=Om0=v
^y[- e9O|
private int[] queue; i9D<jkc
6mV^akapv
public int get() { U&0 RQ:B
return queue[1]; *vOk21z77d
} Fhga^.5U&
czT]XF
public void remove() { ]nq/yAF%
SortUtil.swap(queue,1,size--); :ka^ztXG
fixDown(1); =Y5_@}\0
} xM![
file://fixdown 6 tl#AJ-
private void fixDown(int k) { Fb6d1I^wR
int j; #~[{*[B+
while ((j = k << 1) <= size) { ^Vg-fO]V
if (j < size %26amp;%26amp; queue[j] j++; {'yr)(:2M
if (queue[k]>queue[j]) file://不用交换 H7}f[4S%
break; ^9 ^DA!'
SortUtil.swap(queue,j,k); {\gpXVrn_
k = j; gjk;An
} {43J'WsJ
} VcLzv{
private void fixUp(int k) { \i3)/sZ?l
while (k > 1) { j+("4b'
int j = k >> 1; ;cGY
if (queue[j]>queue[k]) >1$Vh=\OI
break; 'cA(-ghY/E
SortUtil.swap(queue,j,k); .JV y}^Q\
k = j; Rd[^)q4d$w
} rp=Y }
} w%-S5#
h!?rk|
} r9n:[A&HE
-Eoq#ULvR
} L| ;WE=
otlv;3263
SortUtil： eU\XAN#@
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package org.rut.util.algorithm; +*wr=9>
t&~*!w!+jH
import org.rut.util.algorithm.support.BubbleSort; yz=aJ v; H
import org.rut.util.algorithm.support.HeapSort; 8khIy-9-'
import org.rut.util.algorithm.support.ImprovedMergeSort; -PTfsQk
import org.rut.util.algorithm.support.ImprovedQuickSort; }^2'@y!(
import org.rut.util.algorithm.support.InsertSort; onl,R{,`0
import org.rut.util.algorithm.support.MergeSort; (U@$gkUx}G
import org.rut.util.algorithm.support.QuickSort; 4+MaV<!tU^
import org.rut.util.algorithm.support.SelectionSort; M2I*_pI
import org.rut.util.algorithm.support.ShellSort; f o idneus
TQth"Cv2:
/** cp6I]#X
* @author treeroot \-8aTF
* @since 2006-2-2 &]pY~zVc
* @version 1.0 *W2o$_Hs
*/ c$x>6&&L
public class SortUtil { `eeA,K_
public final static int INSERT = 1; 9I(00t_
public final static int BUBBLE = 2; 49YN@PXC
public final static int SELECTION = 3; mJYD"WgY
public final static int SHELL = 4; A_crK`3
public final static int QUICK = 5; E] rBq_S
public final static int IMPROVED_QUICK = 6; gt\kTn."
public final static int MERGE = 7; g([M hf#
public final static int IMPROVED_MERGE = 8; Hyi'z1
public final static int HEAP = 9; odn3*{c{x
'V\V=yc1
public static void sort(int[] data) { R{pF IyR
sort(data, IMPROVED_QUICK); 4hzdc] a
} @@cc/S
private static String[] name={ bnJ4Edy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7&u$^c S(
}; WEtPIHruyt
!|8"}ZF
private static Sort[] impl=new Sort[]{ &@=W+A=c~
new InsertSort(), Hwcmt!y
new BubbleSort(), M0$E_*
new SelectionSort(), je%D&ci$
new ShellSort(), b@O{eQB
new QuickSort(), H4$f+
new ImprovedQuickSort(), NryOdt tI
new MergeSort(), jB`:(5%RO
new ImprovedMergeSort(), +!ZfJZls
new HeapSort() / }*}r
}; u:^sEk"Lk'
<GF^VT|Ce
public static String toString(int algorithm){ !t}yoN n|
return name[algorithm-1]; wNU;gz
} ]r'D
.y lvJ$
public static void sort(int[] data, int algorithm) { [s{[ .0P]+
impl[algorithm-1].sort(data); txE+A/>i9
} :(@P *"j
)_Z^oH ]<
public static interface Sort { ,T$ GOjt
public void sort(int[] data); 3R-5&!i
} M6GiohI_"P
Hg$7[um
public static void swap(int[] data, int i, int j) { X4{<{D`0t8
int temp = data; S&QXf<v
data = data[j]; EWr7eH
data[j] = temp; 0T^0)c
} )?pnV":2Y
} R:j mn