[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; {H0B"i
} wl9E
int i1=l; cT.1oaAM0
int i2=mid+1; "J[Crm
for(int cur=l;cur<=r;cur++){ =&}dP%3LC)
if(i1==mid+1) (a)d7y.oo
data[cur]=temp[i2++]; yYF80mnJz
else if(i2>r) ;PLby]=O
data[cur]=temp[i1++]; '9^x"U9c
else if(temp[i1] data[cur]=temp[i1++]; x>Q#Bvy
else W6wgX0H
data[cur]=temp[i2++]; >L=l{F6 p
} Bd\p!f<
} 2abWIw4
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} BJ{mX>I(
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改进后的归并排序: le8n!Dk(
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package org.rut.util.algorithm.support; Pb[wysy
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import org.rut.util.algorithm.SortUtil; [m('Y0fwO^
BQw#PXp3
/** HYpB]<F
* @author treeroot 1[B?nk
* @since 2006-2-2 UHR)]5Lt
* @version 1.0 }hl# e[$
*/ !@*Ac$J>$
public class ImprovedMergeSort implements SortUtil.Sort { ]LP&v3
lDAw0 C3
private static final int THRESHOLD = 10; v}[7)oj|
se(_`a/4Q
/* =\_MJ?A$
* (non-Javadoc) A u(Ngq
* !xa,[$w(^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <L5[#V_
*/ .!=g
public void sort(int[] data) { 1Rwk}wL
int[] temp=new int[data.length]; Ym!Ia&n
mergeSort(data,temp,0,data.length-1); vw+ @'+
} =zI eZ7
v( (fRX.`
private void mergeSort(int[] data, int[] temp, int l, int r) { *4+;Ey
int i, j, k; BU])@~$
int mid = (l + r) / 2; YFsEuaV
if (l == r) m: w/[|_
return; :Fm+X[n
if ((mid - l) >= THRESHOLD) Pm;"Y!S<
mergeSort(data, temp, l, mid); #ljfcQm
else 6AzH'HF
insertSort(data, l, mid - l + 1); t ZFG`'/
if ((r - mid) > THRESHOLD) wRUpQ~=B2
mergeSort(data, temp, mid + 1, r); j;<;?IW
else RCgs3JIE+2
insertSort(data, mid + 1, r - mid); ,=z8aiUu
mqtl0P0
for (i = l; i <= mid; i++) { kS+*@o
temp = data; )2FS9h.t
} 5v>(xl
for (j = 1; j <= r - mid; j++) { \!s0VEE
temp[r - j + 1] = data[j + mid]; cV)C:!W2
} # {!Qf\1M
int a = temp[l]; SRj|XCd
int b = temp[r]; [\. ho9
for (i = l, j = r, k = l; k <= r; k++) { )S>~h;
if (a < b) { "1`c^
data[k] = temp[i++]; r#^X]
a = temp; [}d 3u!
} else { I_Oa<J\+
data[k] = temp[j--]; !y?g$e`
b = temp[j]; A^o
} L42C<
} 2rD`]neA
} f*kT7PJG
xOD;pRZQ
/** m"@M~~bh
* @param data >*Y~I0>
* @param l ,?i#NN5p
* @param i `EV[uj&1S
*/ k(hes3JV
private void insertSort(int[] data, int start, int len) { N6yqA)z?;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (~/D*<A
} $NJi]g|<3
} blxH`O!
} _.wLQL~y
} [YJP
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堆排序： d) G7U$z~
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package org.rut.util.algorithm.support; "hpK8vQ
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import org.rut.util.algorithm.SortUtil; A-.jv
[4(TG<I
/** v@"xEf1n[
* @author treeroot 3]<$;[Q
* @since 2006-2-2 0(-'L\<>x
* @version 1.0 Qh)@-r3
*/ Wc03Sv&FZ
public class HeapSort implements SortUtil.Sort{ jlzqa7
Q)HVh[4
/* (non-Javadoc) > NK?!!A_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g"xLS}Al
*/ $ShL^g@
public void sort(int[] data) { -\AB!#fh
MaxHeap h=new MaxHeap(); q^Oq:l$s
h.init(data); N$?mula
for(int i=0;i h.remove(); 7P:0XML}
System.arraycopy(h.queue,1,data,0,data.length); Yq<D(F#qx
} :]e:-JbT4z
OFCkQEG=y>
private static class MaxHeap{ QQ1+uY
yq\)8Fe
void init(int[] data){ %=\h=\wt
this.queue=new int[data.length+1]; L{'qZ#N[
for(int i=0;i queue[++size]=data; p;BdzV>
fixUp(size); 4$d|}ajH
} d/Fjs0pt
} `;5UlkVZ5
:3{@LOil^
private int size=0; Og"50-
ObMsncn
private int[] queue; 1wqCoDgkp
8uS1HE\%
public int get() { NzNAhlXj3
return queue[1]; xg\M9&J
} S #&HB
h'w9=Pk~6y
public void remove() { a5z.c_7r
SortUtil.swap(queue,1,size--); Mz+|~'R
fixDown(1); rm(<?w%'?
} `H^Nc\P#
file://fixdown DQH _@-q
private void fixDown(int k) { hG&RGN_<6+
int j; 2%1g%
while ((j = k << 1) <= size) { {HvR24#
if (j < size %26amp;%26amp; queue[j] j++; Af ^6
if (queue[k]>queue[j]) file://不用交换 8+v6%,K2
break; {Kd9}CDAZ
SortUtil.swap(queue,j,k); fx%'7/+
k = j; ^fXNeBj
} HSp*lHU
} }B^s!y&b
private void fixUp(int k) { ZEUd?"gaR
while (k > 1) { :a#]"z0
int j = k >> 1; Y5cUOfYT
if (queue[j]>queue[k]) 4 lJ@qhV
break; RAXqRP,iw
SortUtil.swap(queue,j,k); %v :a
k = j; pRUN[[L
} c{rX7+bN
} zO9|s}J8q
H,KU!1p
} 9"_qa q
OQW#BBet@
} tG{e(
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SortUtil： dq"b_pr;
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package org.rut.util.algorithm; RZm5[n
52wq<[#tK
import org.rut.util.algorithm.support.BubbleSort; q,$UKg#i
import org.rut.util.algorithm.support.HeapSort; .'5yFBS
import org.rut.util.algorithm.support.ImprovedMergeSort; REnRpp$
import org.rut.util.algorithm.support.ImprovedQuickSort; ^X"G~#v=q
import org.rut.util.algorithm.support.InsertSort; dUOjPq97
import org.rut.util.algorithm.support.MergeSort; Q3wD6!'&m
import org.rut.util.algorithm.support.QuickSort; S)@R4{=e"V
import org.rut.util.algorithm.support.SelectionSort; JS}W4 N
import org.rut.util.algorithm.support.ShellSort; /M v\~vg$1
u)R>ozER
/** 2frJSV?
* @author treeroot 7+#^:;19`
* @since 2006-2-2 </:f-J%U/
* @version 1.0 RyIr_:&-~
*/ h_*=_2|}
public class SortUtil { `k^ i#Nc>
public final static int INSERT = 1; H<X4R
public final static int BUBBLE = 2; P}DrUND
public final static int SELECTION = 3; L1P]T4a@)
public final static int SHELL = 4; _ CXKJ]m4
public final static int QUICK = 5; ~W%A8`9
public final static int IMPROVED_QUICK = 6; sjWhtd[fgG
public final static int MERGE = 7; 2"yzrwZ:
public final static int IMPROVED_MERGE = 8; D#W{:_f
public final static int HEAP = 9; n_.2B$JD
8[(c'rl|)|
public static void sort(int[] data) { UFouIS#L
sort(data, IMPROVED_QUICK); @<W"$_r-
} K]N^6ome
private static String[] name={ 6\OSIxJZF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &"Ua"H)
}; s3/->1#i
"*kWM
private static Sort[] impl=new Sort[]{ Vy16Co
new InsertSort(), qECc[)B
new BubbleSort(), onG,N1`+
new SelectionSort(), (}gF{@sn
new ShellSort(), +g7Iu! cA
new QuickSort(), Q%o
new ImprovedQuickSort(), ,Xo9gn
new MergeSort(), zRsT6u
new ImprovedMergeSort(), e0(loWq]
new HeapSort() PPPRO.y
}; (<itE3P
]/JE#
public static String toString(int algorithm){ A9p$5jt7
return name[algorithm-1]; D3;^!ln]D
} Ibd7[A\
W{1=O)w
public static void sort(int[] data, int algorithm) { Fl(+c0|kT
impl[algorithm-1].sort(data); (.<Gde#
} X~]eQaJ
rS>njG;R
public static interface Sort { 84e)huAs
public void sort(int[] data); ,XI,B\eNk
} K&D -1u
\P&'4y~PL
public static void swap(int[] data, int i, int j) { !COaPrg
int temp = data; s/`4]B;2U
data = data[j]; k-b_ <Tbo|
data[j] = temp; q<,?:g$k
} Fr/8q:m&
} IDdhBdQ