[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; n&. bs7N2
} [":[\D'
int i1=l; :qx>P_&y}z
int i2=mid+1; R|Oy/RGY$
for(int cur=l;cur<=r;cur++){ 5 i1T?
if(i1==mid+1) MuQBn7F{c
data[cur]=temp[i2++]; E0nR Vg
else if(i2>r) 8Ee bWs*1
data[cur]=temp[i1++]; 6zQ {Y"0
else if(temp[i1] data[cur]=temp[i1++]; cI)XXb4
else A2`QlhZ
data[cur]=temp[i2++]; W~1/vJ.*l
} m_%1IJ
} n0X_m@
&h7q=-XU
} ,_66U;T
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改进后的归并排序: oCLs"L-r{
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package org.rut.util.algorithm.support; G-U%
pai>6p
import org.rut.util.algorithm.SortUtil; ."m6zq
u}QB-oU
/** `ag7xd!
* @author treeroot $jYwV0
* @since 2006-2-2 ub"(,k P
* @version 1.0 5XNIX)H
*/ 3:$hC8
public class ImprovedMergeSort implements SortUtil.Sort { TA47lz q
7'[C+/:
private static final int THRESHOLD = 10; tQ7DdVdix
gTK5z.]
/* hT&,5zaWdv
* (non-Javadoc) {&Kq/sRz
* 5zlgmCGow
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q8:Z.<%8
*/ 9T47U; _)
public void sort(int[] data) { 4#5w^
int[] temp=new int[data.length]; qYg4H|6
mergeSort(data,temp,0,data.length-1); vqLC?{i+
} d[.kGytUt
2`#jw)dM;}
private void mergeSort(int[] data, int[] temp, int l, int r) { #vy:aq<bjE
int i, j, k; "y>\ mC
int mid = (l + r) / 2; (/&IBd-
if (l == r) JM{S49Lx
return; *G^n<p$"
if ((mid - l) >= THRESHOLD) =&*:)
mergeSort(data, temp, l, mid); eNlE]W,=
else xMsos?5}
insertSort(data, l, mid - l + 1); w5l:^^zF(
if ((r - mid) > THRESHOLD) ~U:{~z
mergeSort(data, temp, mid + 1, r); {xw*H<"f<
else r}i<cyL
insertSort(data, mid + 1, r - mid); %$j)?e
4C(vBKl
for (i = l; i <= mid; i++) { NyD[9R?
temp = data; D4yJ:ATO&
} 7N^9D H{`
for (j = 1; j <= r - mid; j++) { e~r%8.Wm
temp[r - j + 1] = data[j + mid]; iTU8WWY<
} Xj^6ZJc
int a = temp[l]; G7k0P-r,0
int b = temp[r]; $Yt29AQ
for (i = l, j = r, k = l; k <= r; k++) { \#5t%t
if (a < b) { M}4%LjD
data[k] = temp[i++]; ?lv{;4BC
a = temp; &\][:kG;
} else { 9?r|Y@xh]
data[k] = temp[j--]; ~UjFL~K}
b = temp[j]; lKs*KwG
} v]g/ 5qI&
} e-4XNL[F
} sk~rjH]-g$
l=5(5\
/** m?-3j65z
* @param data rE"`q1b#
* @param l &0Zn21q
* @param i ;YxQo o>
*/ v*5n$UFV
private void insertSort(int[] data, int start, int len) { W|@EKE.k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (US]e un
} sk!v!^\_r
} Wy%q9x]}
} QP|Ou*Qm)
} =+q9R`!L]
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堆排序： SsDz>PP
RqW ZhHI1M
package org.rut.util.algorithm.support; Q7$ILW-S
DO(-)izC
import org.rut.util.algorithm.SortUtil; Vg/{;uLAe
S\GC^ FK
/** ?eT^gWX
* @author treeroot ]#N2:ych
* @since 2006-2-2 )((Jnm D
* @version 1.0 i TY4X:x
*/ |")}p=
public class HeapSort implements SortUtil.Sort{ Vb06z3"r
T#^
/* (non-Javadoc) >#B%gxff
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gd[jYej'RP
*/ KotJ,s]B
public void sort(int[] data) { C>Qgd9
MaxHeap h=new MaxHeap(); EA%(+tJ^0
h.init(data); E;~gQ6vAI
for(int i=0;i h.remove(); Qvs}{h/
System.arraycopy(h.queue,1,data,0,data.length); ,+P!R0PNH
} 5n1;@Vr
xL4qt=
private static class MaxHeap{ $ud5bT{n
DW@PPvfs
void init(int[] data){ y]9 3z!#Z
this.queue=new int[data.length+1]; m/n_e g
for(int i=0;i queue[++size]=data; dg 0`0k
fixUp(size); `pzp(\lc
} e0"R7a
} tfj6#{M5
b9[;qqq@'
private int size=0; &^4\Rx_I
L5""
private int[] queue; Kxz<f>`b/
7*y_~H
public int get() { J&S$F:HM
return queue[1]; q2 D2:0^2
} @HJ&"72$<
=6imrRaaV
public void remove() { $x 6Rmd{
SortUtil.swap(queue,1,size--); [o<R#f`
fixDown(1); }6.R.*Imz
} :kqJ~
file://fixdown Dna0M0
private void fixDown(int k) { $"C]y$}
int j; 0 V*Di2
while ((j = k << 1) <= size) { r#*kx#"
if (j < size %26amp;%26amp; queue[j] j++; oabc=N!7r
if (queue[k]>queue[j]) file://不用交换 !7@IWz(,"
break; _)Q)tOW
SortUtil.swap(queue,j,k); ed4:r/Dpo
k = j; ji<b#YO4
} ws Lg6
} U.hV1
private void fixUp(int k) { NY\q
while (k > 1) { p!>FPS
int j = k >> 1; =2pGbD;*
if (queue[j]>queue[k]) R_\{a*lV0
break; vb)Z&V6(
SortUtil.swap(queue,j,k); W$ #FM$U
k = j; 8AT;9wZqt
} |{+D65R
} #9}E@GGs
^kxkP}[Z.
} $'dJ+@
:\L{S
} VdQ}G!d
Jf@M>BT^A
SortUtil： Z+)R%Z'aL
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package org.rut.util.algorithm; 4m$nVv
,x!P|\w.G{
import org.rut.util.algorithm.support.BubbleSort; [sp=nG7i&
import org.rut.util.algorithm.support.HeapSort; Rv ?Go2
import org.rut.util.algorithm.support.ImprovedMergeSort; bKj#HHy\I
import org.rut.util.algorithm.support.ImprovedQuickSort; X0J@c "%0
import org.rut.util.algorithm.support.InsertSort; a \B<(R.
import org.rut.util.algorithm.support.MergeSort; e~=fo#*2?@
import org.rut.util.algorithm.support.QuickSort; id@!kSR
import org.rut.util.algorithm.support.SelectionSort; &Eg>[gAIlp
import org.rut.util.algorithm.support.ShellSort; n|IdEgD$
mZ3i#a4
/** 6c>t|=Ss(
* @author treeroot 1HL}tG?+#
* @since 2006-2-2 U|6ME%xm
* @version 1.0 Sx+.<]t2A
*/ L.>tJ.ID
public class SortUtil { )`yxJ;O@$
public final static int INSERT = 1; ^;n,C+
public final static int BUBBLE = 2; bEP-I5j1t
public final static int SELECTION = 3; k1i*1Tc
public final static int SHELL = 4; pbKDtqSnz
public final static int QUICK = 5; lb5Y$ZC
public final static int IMPROVED_QUICK = 6; pL8+gL
public final static int MERGE = 7; YuSe~~F)j
public final static int IMPROVED_MERGE = 8; w'K\}G~
public final static int HEAP = 9; zz 7m\
G*2bYsnhX
public static void sort(int[] data) { 0DhF3]
sort(data, IMPROVED_QUICK); A;m)/@
} ViQxOUE
private static String[] name={ /ZHuT=j1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l;}D| 6+_W
}; )VQ:L:1t(
Ox.&tW%@
private static Sort[] impl=new Sort[]{ [[P?T^KT
new InsertSort(), yZ)GP!cM4c
new BubbleSort(), `YAqR?Xj_<
new SelectionSort(), %50}oD@
new ShellSort(), j!GJ$yd=-6
new QuickSort(), a{^[<
new ImprovedQuickSort(), > nY<J
new MergeSort(), 9"1 0:\U
new ImprovedMergeSort(), _$PZID
new HeapSort() KL,=Z&.<=
}; 3&_O\nD
db`xlvrCY
public static String toString(int algorithm){ Mz# &"WjF
return name[algorithm-1]; 5_ -YF~
} 5 :6^533]
H`CDfTy
public static void sort(int[] data, int algorithm) { "pdmz+k8S
impl[algorithm-1].sort(data); I0P)DR
} bPEf2Z G4
;X-~C.7k
public static interface Sort { FFb`4.
public void sort(int[] data); ]WR+>)ERb
} /cF 6{0XS9
{ER! 0w/
public static void swap(int[] data, int i, int j) { SY>i@s+ML
int temp = data; Pe8WBr;`
data = data[j]; /c'3I
data[j] = temp; wO&`3Q3~$
} ^_#0\f
} \k/ N/&;