[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; c|+y9(0|y
} :|Upx4]Ec
int i1=l; 4':MI|/my_
int i2=mid+1; q{[1fE"[K4
for(int cur=l;cur<=r;cur++){ wzg i @i
if(i1==mid+1) !@A|L#*
data[cur]=temp[i2++]; ps"9;4P
else if(i2>r) Vl-D<M+ih
data[cur]=temp[i1++]; ;tm3B2
else if(temp[i1] data[cur]=temp[i1++]; VYHOk3
else ZrA Um
data[cur]=temp[i2++]; 8z?$t-DO
} mcCB7<. e
} ^^7gDgT
n00z8B1j(l
} UYH|?Jw!N
4I z.fAw
改进后的归并排序: " xlJs93c
M.X}K7Z_/
package org.rut.util.algorithm.support; lu3Q,W
p?}&)Un
import org.rut.util.algorithm.SortUtil; [+_\z',u
} mgVC
/** aE}=^%D
* @author treeroot a!&bc8J7
* @since 2006-2-2 ?~{rf:Y
* @version 1.0 ]bf'
*/ 7bHE!#L`0
public class ImprovedMergeSort implements SortUtil.Sort { =%xIjxYl
ta@ISRK
private static final int THRESHOLD = 10; wQ@Zwbx
&:-GI)[o
/* 5VuCU
* (non-Javadoc) B5D3_iX]
* 9#ZzE/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <. ezw4ju
*/ r!CA2iK`
public void sort(int[] data) { `d.Gw+Un
int[] temp=new int[data.length]; F|9a}(-7
mergeSort(data,temp,0,data.length-1); Ca$y819E2
} x-tm[x@;o
Sb^add0dT
private void mergeSort(int[] data, int[] temp, int l, int r) { `Yg7,{A\J
int i, j, k; \MF3CK@/
int mid = (l + r) / 2; JATS6-Lz`
if (l == r) gh.w Li$+
return; Q=^ktKMeR
if ((mid - l) >= THRESHOLD) w 7Cne%J8
mergeSort(data, temp, l, mid); >xklt"*U,
else suzFcLxo
insertSort(data, l, mid - l + 1); ?56~yQF/2
if ((r - mid) > THRESHOLD) |C^ c0
mergeSort(data, temp, mid + 1, r); tWcizj;?wK
else ^ sS>Mts
insertSort(data, mid + 1, r - mid); w{RNv%hJ$=
"0!~g/X`rK
for (i = l; i <= mid; i++) { L00Sp#$\
temp = data; 2*N&q|ED
} ys:1Z\$P
for (j = 1; j <= r - mid; j++) { B>ms`|q=l
temp[r - j + 1] = data[j + mid]; xV"6d{+
} ?f(pQy@V
int a = temp[l]; ~JIywzcf8
int b = temp[r]; bXa %EMF
for (i = l, j = r, k = l; k <= r; k++) { qn5yD!1
if (a < b) { @?'t@P:4
data[k] = temp[i++]; ~JAH-R
a = temp; (N)r#"FV
} else { :y4)qF
data[k] = temp[j--]; <)r,CiS
b = temp[j]; 0*/mc96
} =ZxW8DK
} VFQq`!*i
} EI[e+@J
xgZV0!%
/** R>Z,TQU
* @param data +s#S{b
* @param l 45]Ym{]
* @param i 7f.4/x^
*/ EGp~Vo-
private void insertSort(int[] data, int start, int len) { WZfk}To1#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }|w=7^1z
} Oex{:dO "F
} |!?2OTY
} oG|?F4l*
} ykErt%k<n
E geG,/-`
堆排序： 23(B43zy
,-w-su=J_
package org.rut.util.algorithm.support; $)kk8Q4+K
jx^|2
import org.rut.util.algorithm.SortUtil; o[5=S,'
@2x0V]AI
/** =NVZ$KOZ
* @author treeroot fvAh?<Ul
* @since 2006-2-2 F'$9en2I:
* @version 1.0 pko!{,c
*/ ,mAB)at
public class HeapSort implements SortUtil.Sort{ X67C;H+
'6Pu[^x
/* (non-Javadoc) #u}v7{4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .0R/'!e
*/ 9,Crmbw8
public void sort(int[] data) { @lb=-oR!~
MaxHeap h=new MaxHeap(); pgLzFY['
h.init(data); >S?C {_g
for(int i=0;i h.remove(); PCV58n3
System.arraycopy(h.queue,1,data,0,data.length); 8GF[)z&|P:
} g]EQ2g_N1
6xDl=*&%
private static class MaxHeap{ EOd.Tyb!/
*IMF4x5M
void init(int[] data){ >oM9~7f
this.queue=new int[data.length+1]; bc0)'a\
for(int i=0;i queue[++size]=data; *:fw6mnJ#
fixUp(size); oo$WD6eCR
} w@gl
} 1j${,>4tQ
%x cM_|AyR
private int size=0; zm;*:]S
s+y'<88
private int[] queue; (Fbm9(q$d
ne!j%9Ar
public int get() { 7gZVg@
return queue[1]; {kRDegby
} Skr\a\ J
MA/"UV&M(
public void remove() { T@d_t
SortUtil.swap(queue,1,size--); 4 _c:Vl
fixDown(1); Se;?j-
} e"v[)b++Y
file://fixdown 5'{qEZs^QU
private void fixDown(int k) { :*F3
int j; &kXGWp
while ((j = k << 1) <= size) { V,|Bzcz
if (j < size %26amp;%26amp; queue[j] j++; \>aa8LOe
if (queue[k]>queue[j]) file://不用交换 ^2Fs)19R
break; &<fRej]v
SortUtil.swap(queue,j,k); !~w6"%2+7
k = j; ?@g;[310`
} 2]_4&mU
} '5OVs:)"^
private void fixUp(int k) { lD;,I^Lt6
while (k > 1) { Up!ZCZ$RC
int j = k >> 1; buCm @@o
if (queue[j]>queue[k]) "Dmw-
break; vP87{J*DE1
SortUtil.swap(queue,j,k); 0^)8*O9$
k = j; E{+c*sz
} <g/(wSl
} H8o%H=I%
8 /RfNGY
} E |GK3/
1K*f4BnDr~
} H>X\C;X[
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SortUtil： yG4LQE
C9z~)aL}7
package org.rut.util.algorithm; ~Hyyq-
D<D k1
import org.rut.util.algorithm.support.BubbleSort; M|Lw`?T
import org.rut.util.algorithm.support.HeapSort; upEPv .h
import org.rut.util.algorithm.support.ImprovedMergeSort; bHWvKv+
import org.rut.util.algorithm.support.ImprovedQuickSort; #BT6bH08X
import org.rut.util.algorithm.support.InsertSort; Fy(nu-W
import org.rut.util.algorithm.support.MergeSort; u_[4n
import org.rut.util.algorithm.support.QuickSort; tmY-m,U
import org.rut.util.algorithm.support.SelectionSort; .1[2 CjQ
import org.rut.util.algorithm.support.ShellSort; hklO:,`
dPyBY]`
/** z7.C\l
* @author treeroot v{rK_jq
* @since 2006-2-2 MLv.v&@S
* @version 1.0 VT.{[Kl
*/ 8H%I|fm
public class SortUtil { g_Dt} !A\B
public final static int INSERT = 1; thZ@BrO#
public final static int BUBBLE = 2; d'x<F[`O
public final static int SELECTION = 3; "e7$q&R |
public final static int SHELL = 4; Vf,~MG
public final static int QUICK = 5; WT ~dA95
public final static int IMPROVED_QUICK = 6; (-Ct!aW|
public final static int MERGE = 7; L9unhx
public final static int IMPROVED_MERGE = 8; 9^ *ZH1
public final static int HEAP = 9; ~a8G 5M
5S-o 2a
public static void sort(int[] data) { YL&b9e4
sort(data, IMPROVED_QUICK); 1UA~J|&gi^
} +v[$lh+
private static String[] name={ Oz9Mqcx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y4~wNs6
}; !>kv.`|7~
Zh~Lm
private static Sort[] impl=new Sort[]{ zQ6 -2 A
new InsertSort(), Y5A~iGp8E
new BubbleSort(), VqO<+~M,E
new SelectionSort(), A*26'
new ShellSort(), +VpE-X=T
new QuickSort(), @IyH(J],h
new ImprovedQuickSort(), }^Ua
new MergeSort(), 4k&O-70y4^
new ImprovedMergeSort(), !Bd* L~D
new HeapSort() CXP $bt}
}; Q3'B$,3O^
M;TfD
public static String toString(int algorithm){ (.XDf3
return name[algorithm-1]; tm36Lw
} !K^Z5A_;
s*~jvL
public static void sort(int[] data, int algorithm) { :Z]+Z_9p
impl[algorithm-1].sort(data); LOb'<R\p
} U37?P7i's
hC 4X Y
public static interface Sort { }$k`[ivBx(
public void sort(int[] data); eze(>0\f
} ,,H$>r_;
I}W-5%
public static void swap(int[] data, int i, int j) { KutgW#+40
int temp = data; : $52Ds!i
data = data[j]; I9G*iu=U
data[j] = temp; /&!d
} ZEyGqCf3
} R#Nd|f<