[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; #4{f2s[j6
} DlR&Lnv
int i1=l; 6qK0G$>
int i2=mid+1; `he{"0U~S
for(int cur=l;cur<=r;cur++){ E(M\U5o:
if(i1==mid+1) [H#I:d-+\
data[cur]=temp[i2++]; xa#:oKF3
else if(i2>r) T[=XGAJ
data[cur]=temp[i1++]; XbJ=lH
else if(temp[i1] data[cur]=temp[i1++]; hnM|=[wM
else O\L(I079
data[cur]=temp[i2++]; <ZJ>jZV0*
} $}S5&
} zjh&?G]:G
'[p~| mX
} {sy#&m(el
g S;p::
改进后的归并排序: u pf7:gk +
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package org.rut.util.algorithm.support; 2I:vie
b9(d@2MtK
import org.rut.util.algorithm.SortUtil; Y#c11q Z
%2<chq
/** &L-y1'i=j
* @author treeroot PZO7eEt8
* @since 2006-2-2 q+32|k>)
* @version 1.0 ~Xnq(}?ok
*/ dCcV$BX,K
public class ImprovedMergeSort implements SortUtil.Sort { p;) ;Vm+8
-o F#a 8
private static final int THRESHOLD = 10; pF.Ws,nQ5
UJoWTx
/* c?d+>5"VX
* (non-Javadoc) 4i[3|hv'
* +I2P{7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0-g,C=L
*/ K+H?,I
public void sort(int[] data) { Z>a_vC
int[] temp=new int[data.length]; b]mRn{r?
mergeSort(data,temp,0,data.length-1); DB_ x
} 71Ssk|L
1z~;c|
private void mergeSort(int[] data, int[] temp, int l, int r) { @l&5 |Cia
int i, j, k; 6.~(oepu
int mid = (l + r) / 2; *ZGQ`#1.X6
if (l == r) x}1(okc
return; )xP]rOT
if ((mid - l) >= THRESHOLD) ~@z5Ld3xz
mergeSort(data, temp, l, mid); @P"q`*
else )G ,LG0"-
insertSort(data, l, mid - l + 1); Z8kO*LYv
if ((r - mid) > THRESHOLD) QA.B.U7!
mergeSort(data, temp, mid + 1, r); <V"'j
else .F)b9d[?
insertSort(data, mid + 1, r - mid); V:!fe+Er
,^|+n()O
for (i = l; i <= mid; i++) { e\.|d<N?
temp = data; R]/F{Xs
} ^k^%w/fo
for (j = 1; j <= r - mid; j++) { b_Ba0h=
temp[r - j + 1] = data[j + mid]; I]Wb\&$
} |MMr}]`
int a = temp[l]; iml*+t
int b = temp[r]; %dL|i2+*8
for (i = l, j = r, k = l; k <= r; k++) { "=|yM~V
if (a < b) { Ff& VBm
data[k] = temp[i++]; LjXtOF
a = temp; *kL1r w6
} else { -.g5|B
data[k] = temp[j--]; d2.eDEOsC
b = temp[j]; f]5bAs
} ET_}x7
} `"(7)T{
} fXIeCn
>6ch[W5k@
/** $F G4wA
* @param data OU9=O>
* @param l 0+r/>-3]
* @param i HK&F'\'}
*/ =q[3/'2V$?
private void insertSort(int[] data, int start, int len) { yYdXAenQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fgl"ox
} YQ37P?u@
} Rl3KE)<
} V%ykHo
} e@0wF59
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堆排序： r-Z'
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package org.rut.util.algorithm.support; q.<q(r
2HQ'iEu$
import org.rut.util.algorithm.SortUtil; ~z|/t^
3u{[(W}08
/** f#JLE+0Y
* @author treeroot FAE>N-brQ
* @since 2006-2-2 {%S1x{U}W-
* @version 1.0 _E'M(.B<
*/ uLhamE)
public class HeapSort implements SortUtil.Sort{ (: ZOoL
pBL{DgX
/* (non-Javadoc) "t"dz'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uk;SY[mU
*/ 4ItXZo
public void sort(int[] data) { T X6Ydd
MaxHeap h=new MaxHeap(); r*+9<8-ZX<
h.init(data); VWfrcSZg6M
for(int i=0;i h.remove(); mW8CqW\Q5
System.arraycopy(h.queue,1,data,0,data.length); RNX}Wlo-s
} [.<vISRir
e>z7?"N
private static class MaxHeap{ \3)%p('
A%+~
void init(int[] data){ >t*zY~R.
this.queue=new int[data.length+1]; 7qW:^2y
for(int i=0;i queue[++size]=data; L1rov
fixUp(size); Xx?Jt
} k92X)/ll'
} C(,s_Ks
k,?Y`s
private int size=0; z=ppNP0
Nb]qY>K
private int[] queue; )b!q
<o?qpW$,>
public int get() { ZQ20IY|,
return queue[1]; -'q=oTZ
} m"x~Fjvd
%],.?TS2V
public void remove() { 'R=o,=
SortUtil.swap(queue,1,size--); E>'pMw
fixDown(1); NoYu"57\
} zo\XuoZ
file://fixdown ?LNwr[C0
private void fixDown(int k) { ?;{A@icr
int j; 4F:RLj9P!
while ((j = k << 1) <= size) { L</"m[
if (j < size %26amp;%26amp; queue[j] j++; jsez$m%vs
if (queue[k]>queue[j]) file://不用交换 l0Pg`wH,
break; u:,B"!
SortUtil.swap(queue,j,k); 0|GxOzNd
k = j; uN`ACc)ESi
} ,Y!T!o}1
} ~s5Sk#.z5
private void fixUp(int k) { r2sog{R
while (k > 1) { 5utj$ha2
int j = k >> 1; ^`dp!1.+
if (queue[j]>queue[k]) '!f5|l9SC
break; 1.>sG2*P
SortUtil.swap(queue,j,k); YKM(qh2
k = j; {L4^IKI
} xc*ys-Nv
} s#qq% @
:'!?dszS
} cL1cBWd
7<1Y%|x`
} d!wd,Xj}
m]DjIs*@%h
SortUtil： Rwy:.)7B$q
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package org.rut.util.algorithm; CWDo_g$
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import org.rut.util.algorithm.support.BubbleSort; YK[O#V
import org.rut.util.algorithm.support.HeapSort; sPZa|AKHb
import org.rut.util.algorithm.support.ImprovedMergeSort; E RMh% C
import org.rut.util.algorithm.support.ImprovedQuickSort; ;G\rhk
import org.rut.util.algorithm.support.InsertSort; U`8)rtYw
import org.rut.util.algorithm.support.MergeSort; ,5L&$Q6
import org.rut.util.algorithm.support.QuickSort; oFIs,[Go
import org.rut.util.algorithm.support.SelectionSort; |x kixf4zz
import org.rut.util.algorithm.support.ShellSort; !8A5Y[(XD
vMC;5r6*d
/** &=7ur
* @author treeroot ~O^_J)
* @since 2006-2-2 h2BD?y
* @version 1.0 Bo~wD|E2
*/ 4< H-ol
public class SortUtil { [R Ch7FE23
public final static int INSERT = 1; , 1`eH[
public final static int BUBBLE = 2; P)}:lTe
public final static int SELECTION = 3; UHCx}LGe
public final static int SHELL = 4; U9k}y
public final static int QUICK = 5; ~I^]O \?
public final static int IMPROVED_QUICK = 6; 6"=e+V@
public final static int MERGE = 7; % vP{C
public final static int IMPROVED_MERGE = 8; Y5npz^i
public final static int HEAP = 9; m[8#h(s*t
em W#ZX
public static void sort(int[] data) { };KmMpBn
sort(data, IMPROVED_QUICK); x208^=F\\
} |owhF
private static String[] name={ (h%wO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i$NnHj|
}; jgO{DNe(=
67sb D<r
private static Sort[] impl=new Sort[]{ )1]C%)zn
new InsertSort(), @rJ#Dr
new BubbleSort(), t)v#y!Ci"
new SelectionSort(), sP&E{{<QTF
new ShellSort(), Z'fy9
new QuickSort(), zf S<X
new ImprovedQuickSort(), Cn{UzSKfs
new MergeSort(), HL!-4kN <$
new ImprovedMergeSort(), x)GoxH~#
new HeapSort() #IXQ;2%E
}; \Lc]6?,R
HmiwpI
public static String toString(int algorithm){ :c.i Z
return name[algorithm-1]; k&?QeXW
} =AAH}
nv8,O=#s
public static void sort(int[] data, int algorithm) { +,KuYa{lu
impl[algorithm-1].sort(data); +X- k)9
} ![V<vIy
+0a',`yc
public static interface Sort { p1D-Q7F
public void sort(int[] data); !C+25vup
} Wx-{F
Q^F-8
public static void swap(int[] data, int i, int j) { ilHj%h*z
int temp = data; hFjW.~B
data = data[j]; @Ab<I
data[j] = temp; v>e4a/
} +HcH]D;
} m[7a~-3:J