[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; KK4`l}Fk:n
} VT)oLj/A
int i1=l; e2Pcm_Ahv*
int i2=mid+1; NR6#g,+7
for(int cur=l;cur<=r;cur++){ m])y.T
if(i1==mid+1) net@j#}j-
data[cur]=temp[i2++]; &m7]v,&
else if(i2>r) 3ZPWze6
data[cur]=temp[i1++]; Vm(y7}Aq{
else if(temp[i1] data[cur]=temp[i1++]; BwEN~2u6
else $)i")=Hy
data[cur]=temp[i2++]; ys^oG$lq
} PdFKs+Z`
} 1-uxC^u?|#
76Cl\rV
} !-x$L>1$
S3%FHS
改进后的归并排序: ,-LwtePJ0
+o{R _
package org.rut.util.algorithm.support; `?rSlR@+[I
Jt<_zn_FG
import org.rut.util.algorithm.SortUtil; H2\;%K 2
| j`@eF/"
/** 8'[7 )I=
* @author treeroot ^/>(6>S^M
* @since 2006-2-2 i#/Jr=
* @version 1.0 #G|RnV%t$~
*/ pj{`'; :g
public class ImprovedMergeSort implements SortUtil.Sort { XEp{VC@=
^mDe08. %b
private static final int THRESHOLD = 10; I*{nP)^9
dL 1tl
/* nnEgx;Nl0
* (non-Javadoc) 'F3f+YD
* 2;`1h[,-^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #Y`~(K47
*/ VA>35w
public void sort(int[] data) { 7>0o&
int[] temp=new int[data.length]; kZ .gO
mergeSort(data,temp,0,data.length-1); 7kLz[N6Ll
} 6vo;!V6
/4V#C-
private void mergeSort(int[] data, int[] temp, int l, int r) { 6I4\q.^qw
int i, j, k; ,eW%{[g(
int mid = (l + r) / 2; ZY55|eE
if (l == r) Gr' CtO
return; bHYy}weZ
if ((mid - l) >= THRESHOLD) 4jMFr,
mergeSort(data, temp, l, mid); rQs)O<jl
else -HbC!wv
insertSort(data, l, mid - l + 1); x,+{9
if ((r - mid) > THRESHOLD) %D34/=(X
mergeSort(data, temp, mid + 1, r); {SPq$B_VR
else n1t*sk/J
insertSort(data, mid + 1, r - mid); G@\1E+Ip
$y&E(J
for (i = l; i <= mid; i++) { &X ):4
temp = data; #e1>H1eU
} sN*N&XG
for (j = 1; j <= r - mid; j++) { %#:{UR)E
temp[r - j + 1] = data[j + mid]; Jb@V}Ul$
} Lc,Pom
int a = temp[l]; KnQ*vM*VM
int b = temp[r]; 3?9IJ5p
for (i = l, j = r, k = l; k <= r; k++) { YeL#jtC
if (a < b) { Dlae;5D
data[k] = temp[i++]; `Bp.RXsd*
a = temp; )gIKH{JYL
} else { Q7\w+ANf0
data[k] = temp[j--]; wLH>:yKUU
b = temp[j]; ~O0 $Suv
} X,_2FJv
} nZyX|SPk
} =E4LRKn
u#$]?($}d
/** *boR`[Ond
* @param data @7]yl&LZ
* @param l 4<Utmr
* @param i =,=A,kI[;
*/ ?k&Vy
private void insertSort(int[] data, int start, int len) { -q1??u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vhW2PzHFRi
} mbxZL<ua
} C.yQ=\U2
} $?Hu#Kn,(
} 85:=4N%
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堆排序： xd?f2=dd~h
s}9S8@#
package org.rut.util.algorithm.support; :Zbg9`d*
!qh]6%l
import org.rut.util.algorithm.SortUtil; Fn;SF4KOm
Ts[_u@
/** y<|7z99L
* @author treeroot hHGoP0/o
* @since 2006-2-2 ^R7lom.
* @version 1.0 QL&ZjSN
*/ -`kW&I0
public class HeapSort implements SortUtil.Sort{ iDp)FQ$
/sx&=[ D
/* (non-Javadoc) @s;;O\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qZtzO2Mt
*/ |!3DPA(_
public void sort(int[] data) { uK"=i8rs4
MaxHeap h=new MaxHeap(); DS(}<HK{
h.init(data); F3@phu${
for(int i=0;i h.remove(); xQ-<WF1i
System.arraycopy(h.queue,1,data,0,data.length); *xxx:*6rk;
} DFB@O|JL
*=/ { HvJ
private static class MaxHeap{ F2LLN
!Y0Vid
void init(int[] data){ @]%IK(|
this.queue=new int[data.length+1]; RUnSCOdX
for(int i=0;i queue[++size]=data; d9fC<Tp
fixUp(size); XH4
} ?r "{}%
} pk$l+sNZ=
[I,Z2G,Jb
private int size=0; ;>EM[u
X1x#6 oi
private int[] queue; _ @NL;w:!
np"\19^
public int get() { 8oy^Xc+
return queue[1]; y1eWpPJa
} ~*&H$6NJS
NqazpB*
public void remove() { &WuN&As!Z
SortUtil.swap(queue,1,size--); DZ'P@f)]
fixDown(1); {0Yf]FQb-a
} P6'1.R
file://fixdown T= y}y
private void fixDown(int k) { ,GbR!j@6
int j; n`?aC|P2s
while ((j = k << 1) <= size) { K( c\wr\6
if (j < size %26amp;%26amp; queue[j] j++; Xv5wJlc!d
if (queue[k]>queue[j]) file://不用交换 {Qf=G|Ah
break; >reU#j
SortUtil.swap(queue,j,k); 0y'H~(
k = j; :1.L}4"gg
} ul6]!Iy
} urs,34h
private void fixUp(int k) { .LnGL]/
while (k > 1) { .=7vI$ujd
int j = k >> 1; ^+>laOzC`8
if (queue[j]>queue[k]) .GPT!lDc
break; Y|F9}hj(
SortUtil.swap(queue,j,k); Uou1mZz/
k = j; hP%M?MKC
} r4b 6 c
} FBe;1OU
?DS@e@lx
} c(f
~]|6T~+]83
} .,|G7DGH]
JQ_sUYh~3
SortUtil： >^?u .gM3
b;B%q$sntC
package org.rut.util.algorithm; A7Cm5>Y_S
`iFmrC<
import org.rut.util.algorithm.support.BubbleSort; Fh&G;aEq
import org.rut.util.algorithm.support.HeapSort; [B*x-R[FI
import org.rut.util.algorithm.support.ImprovedMergeSort; T@H^BGs
import org.rut.util.algorithm.support.ImprovedQuickSort; }z'8Bu
import org.rut.util.algorithm.support.InsertSort; hohfE3rd
import org.rut.util.algorithm.support.MergeSort; T*/rySs
import org.rut.util.algorithm.support.QuickSort; hn7# L
import org.rut.util.algorithm.support.SelectionSort; ~f&E7su-6+
import org.rut.util.algorithm.support.ShellSort; w_"E*9
a{'vN93
/** u OmtyX
* @author treeroot eH'av}
* @since 2006-2-2 +5g_KS
* @version 1.0 a_^\=&?'
*/ ehGLk7@7&
public class SortUtil { Q",t3i4
public final static int INSERT = 1; ]NQfX[
public final static int BUBBLE = 2; X&.ArXn*
public final static int SELECTION = 3; |#v7/$!
public final static int SHELL = 4; 8rAg\H3E
public final static int QUICK = 5; WH#1zv
public final static int IMPROVED_QUICK = 6; wy<S;
public final static int MERGE = 7; A_"w^E{P
public final static int IMPROVED_MERGE = 8; l?v86k
public final static int HEAP = 9; g>E LGG|Q
k{R>
public static void sort(int[] data) { %vn"{3y>rF
sort(data, IMPROVED_QUICK); 6fE7W>la
} Di,^%
private static String[] name={ GLH0 ]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hIYNhZv
}; {Y(zd[
i<C*j4qQ
private static Sort[] impl=new Sort[]{ B{n,t}z
new InsertSort(), _b pP50Cu
new BubbleSort(), h6L&\~pf
new SelectionSort(), V@.Ior}w
new ShellSort(), ih-#5M@
new QuickSort(), m+`cS=-.
new ImprovedQuickSort(), NR$3%0 nC6
new MergeSort(), F>SRs=_
new ImprovedMergeSort(), t5^{D>S1
new HeapSort() T= 80,
}; \i>?q
CImWd.W9~
public static String toString(int algorithm){ ].avItg
return name[algorithm-1]; "@^k)d$
} {r,.!;mHu
yt+L0wzzB
public static void sort(int[] data, int algorithm) { ;}I:\P
impl[algorithm-1].sort(data); S3C]AhW;
} gi3F` m
rET\n(AJ
public static interface Sort { >.Pnkx*
public void sort(int[] data); &N$<e(K
} ^x]r`b
C#.->\
public static void swap(int[] data, int i, int j) { ~p6 V,Q
int temp = data; EgEa1l!NSQ
data = data[j]; a K[&V't~
data[j] = temp; \{_q.;}
} ''cInTCr
} A;q9rD,_