[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; 2sWM(SN
} 7pr@aA"vgj
int i1=l; * 496"kU
int i2=mid+1; r@k&1*&
for(int cur=l;cur<=r;cur++){ )I`B+c:
if(i1==mid+1) ;pS Wu9
data[cur]=temp[i2++]; eV}Ow`~I5
else if(i2>r) i!sKL%z}
data[cur]=temp[i1++]; 7e>n{rl
else if(temp[i1] data[cur]=temp[i1++]; r!j_KiUy
else ~eE2!/%9
data[cur]=temp[i2++]; z l@ <X0q
} y\V!OY@
} =][[TH
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} >`\~=ivrD
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改进后的归并排序: '}]w=2Lf
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package org.rut.util.algorithm.support; =d&
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import org.rut.util.algorithm.SortUtil; EXoT$Wt{$
[7Q|vu
/** n$B=Vt,
* @author treeroot exZa:9 sp
* @since 2006-2-2 #!C/~"Y*`|
* @version 1.0 2NqlE
*/ kf.w:X"i
public class ImprovedMergeSort implements SortUtil.Sort { -=QA{n
oB#KR1 >%7
private static final int THRESHOLD = 10; SUHyg/|F
gQ/-.1Pz$
/* q>o1kTI
* (non-Javadoc) $oe:km1-D
* R\ <HR9r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qAHQZKk
*/ dI{)^
public void sort(int[] data) { fPa FL}&
int[] temp=new int[data.length]; 7_ZfV? .
mergeSort(data,temp,0,data.length-1); j^mAJ5
} +{4ziqYj
~UEft
private void mergeSort(int[] data, int[] temp, int l, int r) { b~WiE?
int i, j, k; 2LEf"FH0~
int mid = (l + r) / 2; mfg{% .1
if (l == r) %F]4)XeW-+
return; 5@F1E8T
if ((mid - l) >= THRESHOLD) @y2{LUJe
mergeSort(data, temp, l, mid); 6;"jq92in*
else 3g0[(;
insertSort(data, l, mid - l + 1); _.KKh62CN
if ((r - mid) > THRESHOLD) LlrUJ-uC7
mergeSort(data, temp, mid + 1, r); f{t5r
else Q+$+{g-8
insertSort(data, mid + 1, r - mid); +pkX$yz
B_aLqB]U
for (i = l; i <= mid; i++) { dpxP
temp = data; !Z3iu
} T/X[q7O~~4
for (j = 1; j <= r - mid; j++) { [daUtKz
temp[r - j + 1] = data[j + mid]; ^M0e0
} jO&sS?
int a = temp[l]; &"p7X>bd
int b = temp[r]; :D\M.A
for (i = l, j = r, k = l; k <= r; k++) { "eA4JL\%)
if (a < b) { ^7G@CBic"
data[k] = temp[i++]; f!|7j}3
a = temp; 8' M43n
} else { ]DHB'NOh,
data[k] = temp[j--]; u!S^lV@
b = temp[j]; ('hr;s=
} R7+3$F5B
} 2? 9*V19yu
} 7_xQa$U[
:D|"hJ
/** AqM}@2#%%
* @param data b=amd*
* @param l C2OBgM+
* @param i 4! ]28[2B6
*/ pN|BtrN{
private void insertSort(int[] data, int start, int len) { b*i_'k}*<g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l|TiUjs
} 6jyS]($q
} Kx==vq%39
} >c %*:a
} >1q W*
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堆排序： xn|M]E1)
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package org.rut.util.algorithm.support; 9ozN$:
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import org.rut.util.algorithm.SortUtil; _=!Rl#
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/** ,/*L|M/&5
* @author treeroot Q"rQVO
* @since 2006-2-2 W/e6O??O
* @version 1.0 pbc<326X"
*/ +||y/}1
public class HeapSort implements SortUtil.Sort{ jiw5>RNt
moz*=a
/* (non-Javadoc) !(2rU@.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ns ezUk8'
*/ )zn`qaHK@e
public void sort(int[] data) { TC[(mf:8
MaxHeap h=new MaxHeap(); "Bn8WT2?
h.init(data); CNU,\>J@$
for(int i=0;i h.remove(); mcO/V-\5'
System.arraycopy(h.queue,1,data,0,data.length); drRi<7 i
} W@S>#3,
pe%$(%@v
private static class MaxHeap{ ]c/k%]o~
A:Y ([
void init(int[] data){ d!>.$|b
this.queue=new int[data.length+1]; f0!i<9<
for(int i=0;i queue[++size]=data; %)'# d
fixUp(size); )c432).Z
} 9W5~I9%
} 5=cS5q@
L F<{/c9,
private int size=0; vT1StOx<V
iG+hj:5
private int[] queue; +hiskV@v
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public int get() { kz=Ql|@
return queue[1]; ZRCm'p3
} %)o'9
]]"O)tWHj
public void remove() { ' v)@K0P
SortUtil.swap(queue,1,size--); L[s7q0 F`l
fixDown(1); STln_'DF'
} n VNz5B
file://fixdown ."X}A t
private void fixDown(int k) { xOY %14%Y
int j; d1]1bN4`"0
while ((j = k << 1) <= size) { )/87<Y;o
if (j < size %26amp;%26amp; queue[j] j++; B:X,vE
if (queue[k]>queue[j]) file://不用交换 E^K<b7
break; \mo NpKf
SortUtil.swap(queue,j,k); IJ[r!&PY
k = j; |^:qJ;dOP
} 3:]c>GPQ
} b aO^Z
private void fixUp(int k) { nXRT%[o&
while (k > 1) { (gHCu
int j = k >> 1; 8GN_3pT
if (queue[j]>queue[k]) %:S4OT8]
break; k.5(d.*(
SortUtil.swap(queue,j,k); VvFMpPi
k = j; %noByq,?
} 6,~Y(#
} MrU0Jrk4+
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} :@~W$f\y
|$:y8H'J
} d}:eLC
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SortUtil： :MPfCiAv
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package org.rut.util.algorithm; ybY[2g2QJ
QKB*N)%6
import org.rut.util.algorithm.support.BubbleSort; 5Q$.q&,
import org.rut.util.algorithm.support.HeapSort; DWwPid} "
import org.rut.util.algorithm.support.ImprovedMergeSort; {9 .sW/
import org.rut.util.algorithm.support.ImprovedQuickSort; sF4+(9=
import org.rut.util.algorithm.support.InsertSort; t@vVE{`
import org.rut.util.algorithm.support.MergeSort; OaH1xZNOC`
import org.rut.util.algorithm.support.QuickSort; ZZ*+Tl\ s
import org.rut.util.algorithm.support.SelectionSort; Q1[3C(
import org.rut.util.algorithm.support.ShellSort; qP k`e}D
`k;MGs)&
/** CM`B0[B
* @author treeroot b/soU2?^
* @since 2006-2-2 V<A$eb>6
* @version 1.0 \9!hg(-F
*/ -_?U/k(Hi
public class SortUtil { x>!bvZ2
public final static int INSERT = 1; 23p1Lb9P
public final static int BUBBLE = 2; ^h?]$P
public final static int SELECTION = 3; Rp0`%}2 o
public final static int SHELL = 4; x@LNjlP
public final static int QUICK = 5; FGey%:p9$
public final static int IMPROVED_QUICK = 6; $a#-d;
public final static int MERGE = 7; FQh8(^(
public final static int IMPROVED_MERGE = 8; ^B?brH}
public final static int HEAP = 9; LX8A@Yct
259R5X<V
public static void sort(int[] data) { +ktubJ@Qgj
sort(data, IMPROVED_QUICK); IzI2w6a
} )R^&u`k
private static String[] name={ nh'TyUd!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \=&F\EV
}; L/c`t7
aN?^vW<
private static Sort[] impl=new Sort[]{ Y/<`C
new InsertSort(), +4g H=6
new BubbleSort(), S&J>15oWM`
new SelectionSort(), Ly P Cc|
new ShellSort(), :*I='M9B
new QuickSort(), 8G )O,F7z
new ImprovedQuickSort(), OPuty/^!Gw
new MergeSort(), #ZyY(S1.
new ImprovedMergeSort(), SH6+'7
new HeapSort() kyH0J[/n
}; )}$]~ f4R
N`J]k B7
public static String toString(int algorithm){ XGb*LY+Db6
return name[algorithm-1]; x8!uI)#tS
} lj /IN[U/
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public static void sort(int[] data, int algorithm) { POI|#[-V
impl[algorithm-1].sort(data); q:MSV{k
} k+@,m\tE
8J)Kn4jq
public static interface Sort { 3}2;*:p4Y
public void sort(int[] data); lBzfBmEB
} ><xJQeW
eb>jT:
public static void swap(int[] data, int i, int j) { xnOd$]
int temp = data; {,B.OM)J
data = data[j]; :MihVLF
data[j] = temp; Aa+<4 R
} \GPTGi5A
} L/?jtF:o