[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; 5KJN](x+
} Rt{qbM|b&
int i1=l; 0}]k>ndT
int i2=mid+1; W!g'*L/#L
for(int cur=l;cur<=r;cur++){ BgLK}p^
if(i1==mid+1) tE/s|v#O
data[cur]=temp[i2++]; TCJH^gDt
else if(i2>r) ckRWVw
data[cur]=temp[i1++]; %RgCU$s[>
else if(temp[i1] data[cur]=temp[i1++]; c;l d
else ?#^(QR|/
data[cur]=temp[i2++]; E!J;bX5
} 4J*%$Vxv
} 5-O[(b2O
j;eR9jI$T
} [i24$UT
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改进后的归并排序: /7X:=~m
CN0&uyu#4
package org.rut.util.algorithm.support; Z++JmD1J
/)?]vKMiI
import org.rut.util.algorithm.SortUtil; B3uv>\
4`uI)N(}*
/** |Euf:yWY
* @author treeroot M H }4F
* @since 2006-2-2 GbG!vo
* @version 1.0 'Syq!=,
*/ rgheq<B:
public class ImprovedMergeSort implements SortUtil.Sort { weC$\st:D
SLRQ3<0W_
private static final int THRESHOLD = 10; (u@p[ncN}
`WHP#z
/* iF2/:iP
* (non-Javadoc) y8jk9Tv
* -8&M^-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t5n$sF
*/ ,6?L.L
public void sort(int[] data) { +avu&2B
int[] temp=new int[data.length]; rwr>43S5<3
mergeSort(data,temp,0,data.length-1); _O~DJ"
} 'VCF{0{H~
"Q]`~u':
private void mergeSort(int[] data, int[] temp, int l, int r) { T:S+Pt~
int i, j, k; g!5`R`7
int mid = (l + r) / 2; x]6OE]]8L
if (l == r) Zuod1;qIh
return; aB~?Y+m
if ((mid - l) >= THRESHOLD) ;,n{6`
mergeSort(data, temp, l, mid); H `Fe|6I&
else 9r%O
insertSort(data, l, mid - l + 1); Ak[}s|,)
if ((r - mid) > THRESHOLD) 1t/#ZT!X/
mergeSort(data, temp, mid + 1, r); & D4'hL3
else %{s<h6{R
insertSort(data, mid + 1, r - mid); =xFw4D9
62Yi1<kV@
for (i = l; i <= mid; i++) { 9r!psRA:`)
temp = data; !]7r>NS>
} '"Q;54S**
for (j = 1; j <= r - mid; j++) { lw0l86^Y
temp[r - j + 1] = data[j + mid]; IBr?6_\%"4
} I:[^><?E
int a = temp[l]; Hj"`z6@7
int b = temp[r]; -L(F:
for (i = l, j = r, k = l; k <= r; k++) { b_@MoL@A!
if (a < b) { !\.x7N<)0
data[k] = temp[i++]; OF*m9
a = temp; '+^HeM^;
} else { 5Og.:4
data[k] = temp[j--]; hl?G_%a
b = temp[j]; V~` ?J6
} b&X- &F
} vx /NG$
} Gb.r!W8
~itrM3^"w
/** }8Tr M0q8
* @param data DYkNP:+
* @param l ]Sg4>tp
* @param i EOWLGleD1
*/ ,cD(s(6+
private void insertSort(int[] data, int start, int len) { deO/`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :hB/|H*=
} <5 G+(vP
} 7(AB5.O
} SbI %|
} rAq2
p5&:>>
堆排序： +m kub}<a
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package org.rut.util.algorithm.support; @w|'ip5@
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import org.rut.util.algorithm.SortUtil; u*0Ck*pZ
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/** vfPL;__{Y]
* @author treeroot .XQ_,
* @since 2006-2-2 ;:NW
* @version 1.0 `b 6j7
*/ ,,vl+Z<&
public class HeapSort implements SortUtil.Sort{ YNV4w{>FD
"pGSz%i-
/* (non-Javadoc) }S|~^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3(l^{YC+[7
*/ d[(KgX9
public void sort(int[] data) { (;-< @~2
MaxHeap h=new MaxHeap(); 2.6%?E]
h.init(data); dq[X:3i
for(int i=0;i h.remove(); }DiMt4!ZC!
System.arraycopy(h.queue,1,data,0,data.length); 9BgR@b
} `MtI>x c
-:]_DbF
private static class MaxHeap{ ~LqjWU
v8Gm;~
void init(int[] data){ nS'hdeoW
this.queue=new int[data.length+1]; ?v?b%hK!;
for(int i=0;i queue[++size]=data; ~_R8; b
fixUp(size); 0w[#`
} 60?/Z2w5
} ,tBb$T)7<
v;4l*)$)
private int size=0; #wn`choT'
J+tpBPmb
private int[] queue; f/Cf2 K
Tov!X8p
public int get() { S{_i1'
return queue[1]; V4kt&61
} #)hc^gIO&<
G*.}EoA
public void remove() { Kv3cKNvu~
SortUtil.swap(queue,1,size--); @X\-c2=
fixDown(1); M-Gl".*f
} KneCMFy
file://fixdown uM|*y-4
private void fixDown(int k) { L}r#KfIb
int j; O3H dPQ
while ((j = k << 1) <= size) { ?QuD:vck
if (j < size %26amp;%26amp; queue[j] j++; . AJ(nJ)
if (queue[k]>queue[j]) file://不用交换 uEqL Dg
break; G}ZJ}5h
SortUtil.swap(queue,j,k); ;Gf,$dbWn
k = j; @AM;58.
} ; C/:$l
} z2:^Qg
private void fixUp(int k) { +zMWIG
while (k > 1) { 8XFs)1s[
int j = k >> 1; q^5j&jx Vl
if (queue[j]>queue[k]) Pyfj[m4+}
break; Se*o{V3s$
SortUtil.swap(queue,j,k); N,N9K
k = j; BWRM gN'.
} vhe[:`=a
} R0|dKKzS
h$3o]~t
} 1yHlBeEC
K1i@.`na/$
} B.)!zv\{
53>y<
SortUtil： tS|gQUF17
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package org.rut.util.algorithm; \C<|yD
T\Zf`.mt
import org.rut.util.algorithm.support.BubbleSort; 'vbrzI5m
import org.rut.util.algorithm.support.HeapSort; $,Q0ay
import org.rut.util.algorithm.support.ImprovedMergeSort; R'M=`33M
import org.rut.util.algorithm.support.ImprovedQuickSort; Y|%s =0M
import org.rut.util.algorithm.support.InsertSort; F\LAw#IJ
import org.rut.util.algorithm.support.MergeSort; =QG@{?JTl
import org.rut.util.algorithm.support.QuickSort; )?es3Ehqq
import org.rut.util.algorithm.support.SelectionSort; jhU'UAn
import org.rut.util.algorithm.support.ShellSort; Vqr#%.N
`xb\)
/** r57CyO
* @author treeroot ,|:TML
* @since 2006-2-2 `v;9!ReZV
* @version 1.0 ,ddoII
*/ ;h|zNx0
public class SortUtil { Yi?X|"\`
public final static int INSERT = 1; >J4Tk1//b
public final static int BUBBLE = 2; ([vyY}43h
public final static int SELECTION = 3; \q2:1X|
public final static int SHELL = 4; @D$^- S6
public final static int QUICK = 5; Tvdg:[V<
public final static int IMPROVED_QUICK = 6; s @AGU/v
public final static int MERGE = 7; [diUO1p
public final static int IMPROVED_MERGE = 8; dY|~"6d)
public final static int HEAP = 9; HP/f`8
\OR=+\].9
public static void sort(int[] data) { .K I6<k/
sort(data, IMPROVED_QUICK); "}"hQ.kAz
} [w>T.b
private static String[] name={ ]yg3|C;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &A}@@d
}; Q7V*~{
Nu}x`Qkmr
private static Sort[] impl=new Sort[]{ G3[X.%g`
new InsertSort(), v@_^h}h/,=
new BubbleSort(), AcRrk
new SelectionSort(), G3Z>,"w;=
new ShellSort(), BC*)@=7fx
new QuickSort(), ;^fGQ]`4
new ImprovedQuickSort(), j.}@9
new MergeSort(), |_fmbG
new ImprovedMergeSort(), O$ p
new HeapSort() 'aj97b;lpG
}; mI$<+S1!
,drbj.0-
public static String toString(int algorithm){ g4p-$WyT8>
return name[algorithm-1]; }02#[vg
} nw.,`M,N
H@-txO1`::
public static void sort(int[] data, int algorithm) { g3fxf(iY(
impl[algorithm-1].sort(data); no~Yet+<"
} 6A$ Y]u
jFE1k(2e
public static interface Sort { {DP%=4
public void sort(int[] data); y~16o
} ;_bZH%o.
O{P@fv%~(o
public static void swap(int[] data, int i, int j) { `B1r+uTP~
int temp = data; |"gg2p
data = data[j]; 1u9*)w
data[j] = temp; gfr y5e
} gAFu
} A(j9T,!