[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; .4I"[$?Q
} *hugQh]a
int i1=l; *c"tW8uR
int i2=mid+1; 2oL~N*^C
for(int cur=l;cur<=r;cur++){ B^8]quOH
if(i1==mid+1) & QO9/!
data[cur]=temp[i2++]; Y"eR&d
else if(i2>r) sT&O%(
data[cur]=temp[i1++]; UC@&! kM
else if(temp[i1] data[cur]=temp[i1++]; 42 6l:>D(
else aX`@WXK
data[cur]=temp[i2++]; fMg3
} 2VSs#z!
} f9`F~6$
!\e&7sV~Q
} \gtI4zl*J
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改进后的归并排序: >|Xy'ZR
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package org.rut.util.algorithm.support; Gvo|uB#
mv%Zh1khn/
import org.rut.util.algorithm.SortUtil; 'ju
e-@=QI^,
/** gW0{s[}T
* @author treeroot ZH o#2{F
* @since 2006-2-2 q ERdQ~M,
* @version 1.0 QY$Z,#V)
*/ l;u_4`1H
public class ImprovedMergeSort implements SortUtil.Sort { {3V%
;0R|#9oX_
private static final int THRESHOLD = 10; D I` M
f[S$Gu4-
/* .nGYx
* (non-Javadoc) ry99R|/d1
* $x%3^{G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j?eWh#[K"
*/ D4';QCwo
public void sort(int[] data) { WnATgY t
int[] temp=new int[data.length]; u+U '|6)E
mergeSort(data,temp,0,data.length-1); h~\bJ*Zp
} :#yjg1aej
&DUt`Dr w
private void mergeSort(int[] data, int[] temp, int l, int r) { K/^70;/!.
int i, j, k; G/cE2nD
int mid = (l + r) / 2; _PI w""ssr
if (l == r) 'Cc(}YY0C
return; K9-?7X
if ((mid - l) >= THRESHOLD) dV~yIxD}C*
mergeSort(data, temp, l, mid); T[$! ^WT
else CO+[iJ,4C+
insertSort(data, l, mid - l + 1); P5&mpl1
if ((r - mid) > THRESHOLD) ,F4_ps?(
mergeSort(data, temp, mid + 1, r); qa|"kRCO
else VW," dmC
insertSort(data, mid + 1, r - mid); 7mUpn:U
ZD)pdNX
for (i = l; i <= mid; i++) { /Dh[lgF0C
temp = data; n_8wYiBs(
} $ N7J:Q
for (j = 1; j <= r - mid; j++) { rSGt`#E-s.
temp[r - j + 1] = data[j + mid]; GQU9UXe
} /.?m9O^ F
int a = temp[l]; DA0{s
int b = temp[r]; $}9.4`F>
for (i = l, j = r, k = l; k <= r; k++) { d&!ZCq#_e
if (a < b) { FN-j@
data[k] = temp[i++]; ]GSs{'UhB
a = temp; 9)_fH6r
} else { =|@%5&.P
data[k] = temp[j--]; )2 Omsh
b = temp[j]; ^5"2s:vP
} *58`}]
} ;PBybRW
} Wa/&H$d\u@
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/** :tc]@0+
* @param data c5jd q[0
* @param l xe4F4FC'
* @param i N[(ovr
*/ D$ >gAv
private void insertSort(int[] data, int start, int len) { {95z\UE}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hH=H/L_Z
} y093-
} a0s6G3J+9
} `2 vv8cg^
} _A8x{[$
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堆排序： dc ]+1 A
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package org.rut.util.algorithm.support; d=q&UCC
Wq4>!|
import org.rut.util.algorithm.SortUtil; (|(#W+l~
Q t!X<.
/** evbqBb21b
* @author treeroot W?*]'0
* @since 2006-2-2 %B;e7 UJ
* @version 1.0 LuLnmnmB
*/ uk8vecj
public class HeapSort implements SortUtil.Sort{ c]qq *k#
G!y~Y]e
/* (non-Javadoc) yNwYP%"y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #i#4h<R
*/ @0XqUcV
public void sort(int[] data) { k"J[mT$b
MaxHeap h=new MaxHeap(); Tug}P K
h.init(data); H;&^A5
for(int i=0;i h.remove(); > xc7Hr~
System.arraycopy(h.queue,1,data,0,data.length); _N.N?>
} ]yTMWIx#
>&1MD}
private static class MaxHeap{ [&Kn&bdKW
kF09t5Lr
void init(int[] data){ D@M ZTb
this.queue=new int[data.length+1]; "y%S.ipWG
for(int i=0;i queue[++size]=data; 4 Ar\`{c>
fixUp(size); $LS$:%i4
} 3#d5.Ut
} INm21MS$
~"<AYJlO
private int size=0; pH?tr
MZpG1
private int[] queue; rv(Qz|K@
/Dn,;@ZwAi
public int get() { U%swqle4
return queue[1]; +m> %(?=A
} t+R8{9L-
KUr}?sdz
public void remove() { ;ew3^i.du
SortUtil.swap(queue,1,size--); F2;k6M@
fixDown(1); sC8C><y
} H#/}FoBiS
file://fixdown LK "47
private void fixDown(int k) { IX!Q X
int j; g$qNK`y
while ((j = k << 1) <= size) { ;P` z ?>J:
if (j < size %26amp;%26amp; queue[j] j++; C?UV3
if (queue[k]>queue[j]) file://不用交换 ZfzUvN&!
break; ^%^~:<N
SortUtil.swap(queue,j,k); 0>uMR{ #
k = j; Q%.V\8#|V
} 4X0k1Fw)Y
} [Rz9Di ;
private void fixUp(int k) { E^I|%F
while (k > 1) { Us4ijR d
int j = k >> 1; vgfLI}|5
if (queue[j]>queue[k]) =:T pH>f*
break; @O;gKFx
SortUtil.swap(queue,j,k); {X=gjQ9
k = j; T.1*32cX
} gFJ. p
} =Q % F~
*c\:ogd
} D[.;-4"_
{Z>OAR#
} X8TwMt
8 |2QJ
SortUtil： ";jj`
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package org.rut.util.algorithm; O-rHfIxY
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import org.rut.util.algorithm.support.BubbleSort; 29]T:I1d[
import org.rut.util.algorithm.support.HeapSort; H /E.R[\+x
import org.rut.util.algorithm.support.ImprovedMergeSort; F`l r5
import org.rut.util.algorithm.support.ImprovedQuickSort; xLfx/&2
import org.rut.util.algorithm.support.InsertSort; n'<FH<x
import org.rut.util.algorithm.support.MergeSort; vT*z3
import org.rut.util.algorithm.support.QuickSort; MuzlUW]
import org.rut.util.algorithm.support.SelectionSort; [m>kOv6>^
import org.rut.util.algorithm.support.ShellSort; eq0&8/=
]!yuD/4A
/** 6 ufF34tA
* @author treeroot aP}kl[W
* @since 2006-2-2 D^(Nijl9U
* @version 1.0 W'Wr8~{h
*/ 5*.JXxE;U
public class SortUtil { {q9[0-LyJ
public final static int INSERT = 1; 9v=fE2`-
public final static int BUBBLE = 2; 3BBw:)V
public final static int SELECTION = 3; ar-N4+!@
public final static int SHELL = 4; /D]?+<h1
public final static int QUICK = 5; _]SV@q^
public final static int IMPROVED_QUICK = 6; |hsg=LX
public final static int MERGE = 7; [.M<h^xrB
public final static int IMPROVED_MERGE = 8; ?a~59!u
public final static int HEAP = 9; {> T r22S
}O_kbPNw
public static void sort(int[] data) { LKCj@NdV
sort(data, IMPROVED_QUICK); 6,nws5dh
} {rQSB;3
private static String[] name={ ]>E)0<t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D0'L
}; t5r,3x!E
Fa}3UVm
private static Sort[] impl=new Sort[]{ M2UF3xD
new InsertSort(), jf_xm=n
new BubbleSort(), d5/x2!mH8
new SelectionSort(), dQD YN_
new ShellSort(), _K(w&Kr
new QuickSort(), 7Y`/w$
new ImprovedQuickSort(), |7$Fr[2d
new MergeSort(), )<_e{_h
new ImprovedMergeSort(), '&?OhSeN
new HeapSort() D%L}vugxK
}; ZPrL)']
~YQC!x
public static String toString(int algorithm){ Czj]jA(0f
return name[algorithm-1]; fq-zgqF<
} D6cqON0a.
3lw KV
public static void sort(int[] data, int algorithm) { (;RmfE'PX
impl[algorithm-1].sort(data); "bI'XaSv
} W_w^"'
T%GdvtmS>
public static interface Sort { ^gP pmb<x
public void sort(int[] data); a[Pyxx_K
} ya[][!.G
MHh>~Y(h
public static void swap(int[] data, int i, int j) { ]njObU)[zr
int temp = data; u9-:/<R#}y
data = data[j]; 4bV&U=
data[j] = temp; V`F]L^m=L
} C%hMh/Li;
} :A+nmz!z