[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; qA6;Q$
} ~1v5H]T{
int i1=l; K=82fF(-
int i2=mid+1; +1%7*2q,
for(int cur=l;cur<=r;cur++){ YCd[s[
if(i1==mid+1) &I$MV5)u
data[cur]=temp[i2++]; ("B[P/
else if(i2>r) WD7IF+v
data[cur]=temp[i1++]; Wc+)EX~KS
else if(temp[i1] data[cur]=temp[i1++]; 0xYPK7a=L\
else jRP9e
data[cur]=temp[i2++]; Q-}yZ
} Xn 1V1sr
} Q5H! ^RQm
iFy_D
} V>&WZY
d}t7bgk'j
改进后的归并排序: [_h/DhC:+
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package org.rut.util.algorithm.support; 09SLQVo
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import org.rut.util.algorithm.SortUtil; :_FnQhzg
^%?*u;uU%
/** OF)G2>t
* @author treeroot '-7rHx
* @since 2006-2-2 IE|$mUabm
* @version 1.0 plRBfw>]N
*/ M3U*'A\
public class ImprovedMergeSort implements SortUtil.Sort { zFqlTUD`t
VNcxST15a
private static final int THRESHOLD = 10; BB694
:q0TS>l
/* U- UD27
* (non-Javadoc) S_VZ^1X]
* l$~3_3+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eiV[y^?
*/ eI7FbOze
public void sort(int[] data) { Hq*\,`b&
int[] temp=new int[data.length]; uwcm%N;I"
mergeSort(data,temp,0,data.length-1); ^"e|)4_5\
} Is $I;`
W h^9 Aq
private void mergeSort(int[] data, int[] temp, int l, int r) { }9GD'N?4
int i, j, k; |ZAR!u&0
int mid = (l + r) / 2; 5DEK`#*
if (l == r) S}Q/CT?au
return; VM1`:1Z:$
if ((mid - l) >= THRESHOLD) j<-#a^jb
mergeSort(data, temp, l, mid); mu[:b
else dp3>G2Yq
insertSort(data, l, mid - l + 1); ?W*{%my
if ((r - mid) > THRESHOLD) Nj<}t/e
mergeSort(data, temp, mid + 1, r); +M"Fv9
else 2+7rLf`l
insertSort(data, mid + 1, r - mid); em+dQ15
N<|_tC+ct
for (i = l; i <= mid; i++) { G98P<cyD
temp = data; wsnR$FhQ`
} aeQvIob@
for (j = 1; j <= r - mid; j++) { h2SVDKj
temp[r - j + 1] = data[j + mid]; 9Q<8DMX^
} 78}QaE
int a = temp[l]; `m.).Hda
int b = temp[r]; =o@CCUKpj
for (i = l, j = r, k = l; k <= r; k++) { 'edd6yTd
if (a < b) { RpAqnDX)
data[k] = temp[i++]; L|wD2iw
a = temp; -_bnGY%,
} else { *f[nge&.
data[k] = temp[j--]; G^`IfF-j
b = temp[j]; sw={bUr6G`
} ETw7/S${
} hGPo{>xR
} yM*-em
@%7IZg;P6
/** H\Y5Fd9)
* @param data ?*36&Iq}
* @param l ^u?#fLr
* @param i g ni=S~u
*/ 8!~8:?6n
private void insertSort(int[] data, int start, int len) { g[]UM;D*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N%hV+># Z
} Tq\S-K}4!
} A{[joo
} dr|>P*
} B}PT-S1l
yJCqP=
堆排序： wxa?.
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package org.rut.util.algorithm.support; ?s=O6D&
Vq'\`$_
import org.rut.util.algorithm.SortUtil; 5r*5Co+
eI+<^p_j2
/** 77FI&*q
* @author treeroot _GoV\wGKl
* @since 2006-2-2 LH=gNFgzt
* @version 1.0 #DBg8
*/ B-oQ 9[~
public class HeapSort implements SortUtil.Sort{ rd*`8B
8T7ex(w
/* (non-Javadoc) )w?DB@Tx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L}E~CiL0n
*/ 2 L>;M
public void sort(int[] data) { n(i Uc1Y
MaxHeap h=new MaxHeap(); 'jw?XtG
h.init(data); _JVFn=
for(int i=0;i h.remove(); }?KvT$s
System.arraycopy(h.queue,1,data,0,data.length); g[oa'.*OB
} ~AVn$];{
MI: rH
private static class MaxHeap{ -/x=`S*
m*Zq3j
void init(int[] data){ :y/1Jf'2f
this.queue=new int[data.length+1]; 03ol6y )C
for(int i=0;i queue[++size]=data; #ujry.m
fixUp(size); J`E,Xw>2
} r8.`W\SKX
} ($Cy-p
#%4XZ3j#j;
private int size=0; "!V-@F$@N
}V:B,:
private int[] queue; ''bh{ .x
DFgQ1:6[
public int get() { ?Uq;>
return queue[1]; -YDA,.Ic?
} 8#m,TOp
InO;DA\
public void remove() { !"v[\||1
SortUtil.swap(queue,1,size--); Re=()M
fixDown(1); 9J3@8h p
} k? <.yr1
file://fixdown !lVOZ%
private void fixDown(int k) { 'YKzs;y$
int j; )x!b{5'"7
while ((j = k << 1) <= size) { ;u+k!wn
if (j < size %26amp;%26amp; queue[j] j++; 86*9GS?U(
if (queue[k]>queue[j]) file://不用交换 PBeBI:
break; Su]@~^w
SortUtil.swap(queue,j,k); HT`k-}ho,
k = j; N)I9NM[
} 6'{/Ote
} D*%?0
private void fixUp(int k) { Q9yIQ{>H[
while (k > 1) { Ulf'gD4e
int j = k >> 1; `D%U5Jb
if (queue[j]>queue[k]) 3`JLb]6
break; m4 k:uk7N
SortUtil.swap(queue,j,k); 0N|l1Sn
k = j; LD=eMk: ~
} 6"h,0rR
} v)b_bU]Hx
4.=jKj9j
} 5*O*p `Ba
NmuzAZr
} 5@lVuMIYT
_%@dlT?
SortUtil： AV>_bw.
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package org.rut.util.algorithm; [!~=m
afw`Heaa2(
import org.rut.util.algorithm.support.BubbleSort; `WUyffS/!
import org.rut.util.algorithm.support.HeapSort; &<=?O a
import org.rut.util.algorithm.support.ImprovedMergeSort; wit rC>
import org.rut.util.algorithm.support.ImprovedQuickSort; o7r7HmA@
import org.rut.util.algorithm.support.InsertSort; %`_Rl>@K=
import org.rut.util.algorithm.support.MergeSort; pjN4)y>0
import org.rut.util.algorithm.support.QuickSort; }T5 E^
import org.rut.util.algorithm.support.SelectionSort; 1dhuLN%Ce
import org.rut.util.algorithm.support.ShellSort; P=[_W;->}
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/** 6~!QibA|P
* @author treeroot b8 ^O"oDrp
* @since 2006-2-2 |JL?"cc
* @version 1.0 w;{=
*/ YYN'LF#j
public class SortUtil { 4St-Q]Y _
public final static int INSERT = 1; &-$27
public final static int BUBBLE = 2; o"V+W
public final static int SELECTION = 3; $a01">q&y
public final static int SHELL = 4; QZm7 Q4
public final static int QUICK = 5; I}jem
public final static int IMPROVED_QUICK = 6; ~.<QC<dN
public final static int MERGE = 7; kSpy-bVn
public final static int IMPROVED_MERGE = 8; h6Q~Di
public final static int HEAP = 9; -O^R~Q_`w
\8Hs[H!
public static void sort(int[] data) { q^DQ9B
sort(data, IMPROVED_QUICK); ]#\De73K
} :5X^t
private static String[] name={ kaT !
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kz*6%Cg*~
}; P;G]qV%
:O'QL,
private static Sort[] impl=new Sort[]{ i'QR-B&Z
new InsertSort(), .iC!Ttr
new BubbleSort(), N/!(`Z,
new SelectionSort(), GBl[s,g[|
new ShellSort(), :jf/$]p
new QuickSort(), Zsn@O2
new ImprovedQuickSort(), |ms.
new MergeSort(), lhC^Upqw
new ImprovedMergeSort(), 6lPuYEmT
new HeapSort() PavW@
}; kz/"5gX:
8RI'Fk{
public static String toString(int algorithm){ VaW^;d#
return name[algorithm-1]; %Z3B9
} 6oI/*`>
_o T+x%i
public static void sort(int[] data, int algorithm) { ? *v*fs0
impl[algorithm-1].sort(data); xi<yB0MoA
} Yr*!T= z
S"t\LB*'Ls
public static interface Sort { 1=h5Z3/fj
public void sort(int[] data); iR!]&Oh
} c{IL"B6>
zm{`+boH<
public static void swap(int[] data, int i, int j) { =axuLP))
int temp = data; ' <?=!&\D
data = data[j]; #N$\d4q9
data[j] = temp; m^~5Xr"
} D/VEl{ba-
} b BiTAP