[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; =)9@rV&~
} 8^%Nl `_2B
int i1=l; a5# B&|#q
int i2=mid+1; U>s$}Y:+Z
for(int cur=l;cur<=r;cur++){ $E]WU?U
if(i1==mid+1) 7iBN!"G0
data[cur]=temp[i2++]; h$~\to$C
else if(i2>r) ?\NWKp
data[cur]=temp[i1++]; ]M5w!O!
else if(temp[i1] data[cur]=temp[i1++]; o `N /w
else &o$Pwk\p/
data[cur]=temp[i2++]; &p#$}tm
} 1C'_I
} qg#|1J6e
~kW[d1'c
} V,qc[*_3
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改进后的归并排序: ]~1Xx:X-
P\R#!+FgW8
package org.rut.util.algorithm.support; amH..D7_>
q:/<^|
import org.rut.util.algorithm.SortUtil; D<d4"*qo
O#962\
/** y}t1r |p
* @author treeroot hbg:}R=B<
* @since 2006-2-2 &KS*rHgt?
* @version 1.0 !+# pGSk
*/ J"Z=`I)KON
public class ImprovedMergeSort implements SortUtil.Sort { 5x:dhkW
@fSBW+
private static final int THRESHOLD = 10; &?xZHr`
]1(G:h\
/* -*T<^G;rK
* (non-Javadoc) =xq+r]g6
* O^,%V{]6\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M$0-!$RY
*/ $06[D91'
public void sort(int[] data) { %}=:gF
int[] temp=new int[data.length]; _pS|bqF
mergeSort(data,temp,0,data.length-1); <4|/AF*>
} oX #WT
8A ;)5!
private void mergeSort(int[] data, int[] temp, int l, int r) { _`(WX;sK
int i, j, k; K-CF5i:
int mid = (l + r) / 2; hPB^|#}
if (l == r) <//#0r*
return; d1rIU6
if ((mid - l) >= THRESHOLD) 7A mnxFC
mergeSort(data, temp, l, mid); F$k^px
else ?'$Yj>R6
insertSort(data, l, mid - l + 1); ?' :v):J}
if ((r - mid) > THRESHOLD) awic9uMH
mergeSort(data, temp, mid + 1, r); BQ7p<{G
else H]x-s
insertSort(data, mid + 1, r - mid); /$ :w8
)Z0bMO<
for (i = l; i <= mid; i++) { *VPjBzcH
temp = data; R@8pKCL.
} dRD t.U!T
for (j = 1; j <= r - mid; j++) { HDY2<Hzc
temp[r - j + 1] = data[j + mid]; RU_wr<
} 9_
int a = temp[l]; / !@@
int b = temp[r]; 9$[PAjwk
for (i = l, j = r, k = l; k <= r; k++) { NM{/rvM
if (a < b) { iUua!uC
data[k] = temp[i++]; (Iz$_(
a = temp; G (o9*m1
} else { /eO:1c
data[k] = temp[j--]; r$ 8^K\oF
b = temp[j]; >{HQ"{Q
} PV\aQO.mo
} UTLuzm
} 5u89?-UD
P`xQL
/** !|#W,9
* @param data ?~p]Ey}~9
* @param l c&GVIrJ
* @param i P<5v\\
*/ `UK'IN.il
private void insertSort(int[] data, int start, int len) { ]9P2v X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #@3&1}J/
} ^.HvuG},O
} OkV*,n
} 3Hd~mfO\
} &{uj3s&C
nign"r
堆排序： 45aUz@
MoX~ZewWR
package org.rut.util.algorithm.support; -+ha4JOB
,ut-Di=6
import org.rut.util.algorithm.SortUtil; ^tTASK
Nr,Qu8
/** cM hBOm*
* @author treeroot E;tEmGf6F
* @since 2006-2-2 y2{uEbA
* @version 1.0 !jTtMx
*/ [^S(SPL
public class HeapSort implements SortUtil.Sort{ :2zga=)g
)p^" J|
/* (non-Javadoc) tg%#W`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @/,:". SM
*/ ouE/\4'NB
public void sort(int[] data) { [Xyu_I-c
MaxHeap h=new MaxHeap(); U5RLM_a@M
h.init(data); >_J9D?3S
for(int i=0;i h.remove(); SIridZ*%
System.arraycopy(h.queue,1,data,0,data.length); n(h9I'V8)F
} 90[6PSXk
[2$mo;E?
private static class MaxHeap{ ?`lD|~
{)jTq??
void init(int[] data){ 1]A$
this.queue=new int[data.length+1]; {Z,_/@}N
for(int i=0;i queue[++size]=data; .C*mDi)wZ
fixUp(size); %;eD.If}
} ,6EhtNDu
} teKx^ 'c'
*671MJ9
private int size=0; , UsY0YC
i$5<>\g
private int[] queue; OU esL9
{MV,>T_
public int get() { ?Qxf~,F
return queue[1]; 1.tAl6]
} vvI23!H
2Onp{,'}
public void remove() { :o 8XG
SortUtil.swap(queue,1,size--); S54q?sb_
fixDown(1); TtQ'I}7q
} 2O 2HmL
file://fixdown 21$E.x 6
private void fixDown(int k) { ![i)_XO
int j; p9>1a j2a
while ((j = k << 1) <= size) { k5%W8dI
if (j < size %26amp;%26amp; queue[j] j++; B[,AR"#b
if (queue[k]>queue[j]) file://不用交换 BPuum
break; \i'Z(1
SortUtil.swap(queue,j,k); R*=88ds
k = j; FS)"MDs
} 'eo/"~/*w
} ;,}Dh/&E
private void fixUp(int k) { Z%Fc -KVt
while (k > 1) { 5%%e$o+
int j = k >> 1; 3_ly"\I\
if (queue[j]>queue[k]) "ze-Mb
break; } J[Z)u
SortUtil.swap(queue,j,k); 4_`(c1oA
k = j; 1Q/=s,{u
} /go|r '
} 6CCm1F{`
AP1&TQ,&
} rQxiG[0
H76iBJ66
} s IFE:/1,
g<N;31:c\
SortUtil： ^)(-7H
B<Q)z5KK
package org.rut.util.algorithm; 0NeIQr1N_
?I[*{}@n"
import org.rut.util.algorithm.support.BubbleSort; ", p5}}/
import org.rut.util.algorithm.support.HeapSort; 0|Xz-Y
import org.rut.util.algorithm.support.ImprovedMergeSort; W,|+Dl
import org.rut.util.algorithm.support.ImprovedQuickSort; vc :%
import org.rut.util.algorithm.support.InsertSort; /&c2O X|Z
import org.rut.util.algorithm.support.MergeSort; g#MLA5%=u
import org.rut.util.algorithm.support.QuickSort; Gp{,v
import org.rut.util.algorithm.support.SelectionSort; p$t|eu
import org.rut.util.algorithm.support.ShellSort; q;}iW:r&Q
j4<K0-?
/** Xhq7)/jp
* @author treeroot NS65F7<&
* @since 2006-2-2 P(3k1SM
* @version 1.0 [#9i@40
*/ WfD fj
public class SortUtil { EV?U !O
public final static int INSERT = 1; T](}jQxj`
public final static int BUBBLE = 2; RG*Vdom
public final static int SELECTION = 3; $AT@r"
public final static int SHELL = 4; ^)wKS]BQ..
public final static int QUICK = 5; zak|* _
public final static int IMPROVED_QUICK = 6; a'-u(Bw
public final static int MERGE = 7; d:kn%L6k_
public final static int IMPROVED_MERGE = 8; ae2Q^yLA
public final static int HEAP = 9; lYTQg~aPm
X$;&Mdo.
public static void sort(int[] data) { *s,[Uy![
sort(data, IMPROVED_QUICK); zXM,cV/s
} (6.uNLr
private static String[] name={ _1NK9dp:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'zM=[#!B
}; LFI#wGhXVk
l>MDCqV
private static Sort[] impl=new Sort[]{ HhL;64OYa
new InsertSort(), {#ynN`tLyF
new BubbleSort(), cT(6>@9@
new SelectionSort(), R{fJ"Q5'
new ShellSort(), jQ,Vs=*H
new QuickSort(), Kxch.$hc,
new ImprovedQuickSort(), V"Z8-u
new MergeSort(), g@37t @I
new ImprovedMergeSort(), <|3%}?
new HeapSort() P`ou:M{8
}; .%s U)$bH
=#/Kg_RKL
public static String toString(int algorithm){ m`9nDiV
return name[algorithm-1]; f4fBUZ^ A
} f-G)pHm
'L7qf'RV
public static void sort(int[] data, int algorithm) { SIV !8mz
impl[algorithm-1].sort(data); h~m,0nGO
} .07`nIs"
~N/r;omVc
public static interface Sort { mUbm3JIjJ
public void sort(int[] data); X%+lgm+
} R!%nzL@e&`
0_eqO'"
public static void swap(int[] data, int i, int j) { mwo:+^v(
int temp = data; !(rAI
data = data[j]; QXZyiJX}
data[j] = temp; `XhH{*Q"X
} `Bw]PO
} "bIb?e2h9G