[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; 1ir~WFP
} p N+1/m,
int i1=l; y^:N^Gt
int i2=mid+1; ?s]+2Tq
for(int cur=l;cur<=r;cur++){ PblO?@~O
if(i1==mid+1) ;&9wG`
data[cur]=temp[i2++]; %X -G(Z
else if(i2>r) }rA _4%
data[cur]=temp[i1++]; FR^(1+lx&
else if(temp[i1] data[cur]=temp[i1++]; irooFR[L9
else ,V &RpKek
data[cur]=temp[i2++]; \Z8:^ct.P
} _Gtq]`y
} UFPSQ
8i~n;AhDs
} vYNu=vnM
|2!cPf^8
改进后的归并排序: *\#?)q
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package org.rut.util.algorithm.support; hQ_gOI
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import org.rut.util.algorithm.SortUtil; 5:vy_e&
gJYX
/** kWZ/O
* @author treeroot i%# <Hi7
* @since 2006-2-2 dOFK;
* @version 1.0 5pz(6gA
*/ }J+\o~
public class ImprovedMergeSort implements SortUtil.Sort { cyXnZs ?|
OM (D@up
private static final int THRESHOLD = 10; el3lR((H
u.ub:
/* h(gpqSN
* (non-Javadoc) mw flx8
* 4l~B/"}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }ZB:nnG
*/ glUf.:]
public void sort(int[] data) { eb=#{
int[] temp=new int[data.length]; {w52]5l
mergeSort(data,temp,0,data.length-1); bCmlSu
} q~6((pWi|
[DSD[[ z[
private void mergeSort(int[] data, int[] temp, int l, int r) { }0 b[/ZwQ
int i, j, k; ;oivG)hJl
int mid = (l + r) / 2; V1 O]L66
if (l == r) U}:e-
return; ~L?q.*q
if ((mid - l) >= THRESHOLD) RGz NZc
mergeSort(data, temp, l, mid); q-D|96>8
else [`U9
insertSort(data, l, mid - l + 1); dW9Ci"~v
if ((r - mid) > THRESHOLD) g1(`a`M
mergeSort(data, temp, mid + 1, r); gaVQ3NqF
else cUD}SOW
insertSort(data, mid + 1, r - mid); hx:"'m5
aqoxj[V^3L
for (i = l; i <= mid; i++) { {hi'LA-4@
temp = data; o06vC
} eG08Xt|lc
for (j = 1; j <= r - mid; j++) { %dDwus
temp[r - j + 1] = data[j + mid]; s\io9'Ec
} 57rH`UFXH
int a = temp[l]; ]}A3Pm- t*
int b = temp[r]; ES9|eo6
for (i = l, j = r, k = l; k <= r; k++) { &vV_,$
if (a < b) { "2>_eZ#b
data[k] = temp[i++]; C,G$C7$%
a = temp; %Kc2n9W
} else { {i|$^A3
data[k] = temp[j--]; b$/'dnx
b = temp[j]; <}t<A
} X~>2iL
} I7} o>{
} %bZ}vJ5b
m)"wd$O^w
/** Pj7n_&*/
* @param data RJ~I?{yR0[
* @param l ]x^v;r~
* @param i MClvmv^
*/ ,Vr'F
private void insertSort(int[] data, int start, int len) { HV\l86}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u ioBId
} ctT6va
} pHv~^L%=
} sFa5#w*>
} $^louas&
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堆排序： 5~E'21hJ
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package org.rut.util.algorithm.support; 6\GL|#G
W>T6Wlxu`6
import org.rut.util.algorithm.SortUtil; *WK0dn
pipqXe
/** jblj]/
* @author treeroot HRF;qR9v
* @since 2006-2-2 KSB{Z TE
* @version 1.0 qJq2Z.>hy
*/ .vk|aIG
public class HeapSort implements SortUtil.Sort{ _'"$,~ZWY
pqnZ:'V
/* (non-Javadoc) L>{p>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e sDd>W
*/ 8"KaW2/%
public void sort(int[] data) { ).uR@j
MaxHeap h=new MaxHeap(); ZhYOz
h.init(data); yVl?gGgh
for(int i=0;i h.remove(); _|} GhdYE
System.arraycopy(h.queue,1,data,0,data.length); &0*IN nlc?
} BZ"+ ND9m_
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private static class MaxHeap{ mQqv{1
u!DAeE
void init(int[] data){ 6%t>T~x
this.queue=new int[data.length+1]; eZk4$y
for(int i=0;i queue[++size]=data; 18];fC
fixUp(size); EH~XN9b
} -9> oB
} 8}<4f|?
{v~.zRW%]r
private int size=0; 5&N55?G6
a^QyYX}\qR
private int[] queue; c0Oc-,6J
j_Qkw ?
public int get() { e9@7GaL`"S
return queue[1]; 8nQjD<-
} 0VBbSn}Z<
jce^Xf
public void remove() { flzHZH
SortUtil.swap(queue,1,size--); d/!R;,^
fixDown(1); VMb r@9
} G~fM!F0
file://fixdown uIb,n5
private void fixDown(int k) { M qG`P
int j; c037#&Q%#
while ((j = k << 1) <= size) { )%D>U
if (j < size %26amp;%26amp; queue[j] j++; b%"Lwqdr7
if (queue[k]>queue[j]) file://不用交换 FatLc|[
break; VdetY\
SortUtil.swap(queue,j,k); lx"#S'^~
k = j; )[d>?%vfd
} "l.1 UB&
} 41Htsj
private void fixUp(int k) { mZ^ev;
while (k > 1) { WZ]f \S
int j = k >> 1; i1k#WgvZR
if (queue[j]>queue[k]) [mJmT->
break; `am]&0g^+(
SortUtil.swap(queue,j,k); sfwlv^
k = j; #CYDh8X<i
} d]<S/D'i
} LCf)b>C*
Z[pMlg6Z
} /Xo8 kC
N6wCCXd
} ]> 36{k]&
Gn7P` t*.
SortUtil： mpysnKH
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package org.rut.util.algorithm; xQK;3b
9/_F
import org.rut.util.algorithm.support.BubbleSort; \n`)>-
import org.rut.util.algorithm.support.HeapSort; ::eYd23
import org.rut.util.algorithm.support.ImprovedMergeSort; : ZWKrnG
import org.rut.util.algorithm.support.ImprovedQuickSort; cTQ]0<9:e
import org.rut.util.algorithm.support.InsertSort; \WN,.
import org.rut.util.algorithm.support.MergeSort; GoTJm}[NP
import org.rut.util.algorithm.support.QuickSort; :\<D q71
import org.rut.util.algorithm.support.SelectionSort; <4m@WG
import org.rut.util.algorithm.support.ShellSort; z6+D=<
gV\{Qoj
/** Yl#|+xYA5[
* @author treeroot jJOs`'~Q\
* @since 2006-2-2 !0k'fYCa
* @version 1.0 m_pqU(sP
*/ -IF3'VG
public class SortUtil { nnol)|C{5Y
public final static int INSERT = 1; dqu+-43I|
public final static int BUBBLE = 2; *c1)x
public final static int SELECTION = 3; Y!C8@B$MR3
public final static int SHELL = 4; 4>I >y@^
public final static int QUICK = 5; _I1:|y
public final static int IMPROVED_QUICK = 6; A;\1`_i0
public final static int MERGE = 7; quGvq"Y>
public final static int IMPROVED_MERGE = 8; ejjL>'G/|%
public final static int HEAP = 9; Sl7x>=
ZgD%*bH*B
public static void sort(int[] data) { swGp{wJ
sort(data, IMPROVED_QUICK); ~?#B(t
} +91j 1?
private static String[] name={ VvSe`E*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~ WO
}; 8nSEAr~
Jv+N/+M47
private static Sort[] impl=new Sort[]{ yy*8Aw}
new InsertSort(), CfMCc:8mL
new BubbleSort(), rQ*Fc~^L
new SelectionSort(), 2/ES.>K!.
new ShellSort(), |0Y: /uL#)
new QuickSort(), VsJ4sb7
new ImprovedQuickSort(), pdFa]
new MergeSort(), k(bDj[0q^
new ImprovedMergeSort(), >&g^ `
new HeapSort() 0!fT:Ra
}; 1;8%\r[|5^
B2/d%B
public static String toString(int algorithm){ Q2(K+!Oe
return name[algorithm-1]; Vw>AD<Rl
} [S<1|hk s(
bCbpJZ
public static void sort(int[] data, int algorithm) { [)wLji7MK
impl[algorithm-1].sort(data); |DBj<|SX
} 9N@m><N84
uZ/XI {/
public static interface Sort { g;n6hXq4
public void sort(int[] data); kQt#^pO)
} ><Awk~KR
3<%ci&B
public static void swap(int[] data, int i, int j) { ^_rBEyz@
int temp = data; Nm.G,6<J
data = data[j]; R|u2ga~
data[j] = temp; HZJ)q`1E
} %UXmWXF4$
} C^^AN~ZD