[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; S'ms>ZENC
} HUCJA-OZGL
int i1=l; ?vI2mra+
int i2=mid+1; o~"Y_dLsW
for(int cur=l;cur<=r;cur++){ 5_L,7\5#
if(i1==mid+1) 0nB[Udk?
data[cur]=temp[i2++]; FyPG5-
else if(i2>r) qIQ 61><
data[cur]=temp[i1++]; ,1~zMzw^
else if(temp[i1] data[cur]=temp[i1++]; VSV]6$~H
else YPY,gR
data[cur]=temp[i2++]; 7j&EQm5\9
} ME]89 T&
} _G.!^+)kEm
Ef?|0Gm
} N1.1
Lz-|M?(
改进后的归并排序: !hS)W7!ik
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package org.rut.util.algorithm.support; WDV=]D/OE
;8eGf'
import org.rut.util.algorithm.SortUtil; gVh&c4
pBv,,d`
/** ^>Z7."uGY
* @author treeroot N$C+le
* @since 2006-2-2 Eaxsg
* @version 1.0 jAy2C&aP
*/ Q{'4,J-w
public class ImprovedMergeSort implements SortUtil.Sort { *vIP\NL?H
2*#i/SE_
private static final int THRESHOLD = 10; :?FHqfN?_
W ;+()vC
/* /]-yZ0hX0O
* (non-Javadoc) :Mh\;e
* /cUu]#h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +_bxza(ma{
*/ UHU ,zgM
public void sort(int[] data) { aot2F60J,
int[] temp=new int[data.length]; xaoR\H
mergeSort(data,temp,0,data.length-1); (&r` l&0
} c|aX4=Z
W+U0Y,N6
private void mergeSort(int[] data, int[] temp, int l, int r) { }gt)cOaY
int i, j, k; g"m9[R=]6
int mid = (l + r) / 2; &HAu;u@
if (l == r) JXq!v:w6
return; ~jHuJ`]DF
if ((mid - l) >= THRESHOLD) 'r\RN\PT
mergeSort(data, temp, l, mid); I^u~r.
else -Eq[J k
insertSort(data, l, mid - l + 1); `#8kJt
if ((r - mid) > THRESHOLD) l Ib d9F
mergeSort(data, temp, mid + 1, r); !]D`|HoW
else |pG0 .p4
insertSort(data, mid + 1, r - mid); BOcD?rrZ0
-KfK~P3PF
for (i = l; i <= mid; i++) { 4e AMb
temp = data; >b=."i
} ONDO xXs
for (j = 1; j <= r - mid; j++) { G%>[7]H
temp[r - j + 1] = data[j + mid]; >G%oWRk
} oJ3(7Sz
int a = temp[l]; +r;t]
int b = temp[r]; tCGx]\
for (i = l, j = r, k = l; k <= r; k++) { CnZEBAU
if (a < b) { 5$Kj#9g-#
data[k] = temp[i++]; M<NY`7$^
a = temp; 6<QC|>p
} else { t6mv
data[k] = temp[j--]; pnz:<V"Y(
b = temp[j]; |>'N^
} TecMQ0 KD
} |mRlP5
} |j9aTv[`
-\;0gnf{J
/** t0@AfO.'1
* @param data Jp}\@T.
* @param l 5p:BHw;%;
* @param i IpSWg
*/ YwF&-~mp7n
private void insertSort(int[] data, int start, int len) { yZ)9Hd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aT}Hc5L,b
} !vpXXI4
} Cj`~ntMN
} +WMXd.iN,
} yFb"2
gCiM\Qx
堆排序： 1jop;{,^
vyJ8" #]qY
package org.rut.util.algorithm.support; \O;/wf0Hg
:#?_4D!r
import org.rut.util.algorithm.SortUtil; ~"J1@<
e`LkCy[_
/** vxC];nCC#
* @author treeroot 4Otq3s34FT
* @since 2006-2-2 GQhy4ji'z
* @version 1.0 j3`YaWw
*/ hi/d%lNZ
public class HeapSort implements SortUtil.Sort{ MMpId Uhr
'7oCWHq[
/* (non-Javadoc) ITqAy1m@C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GK1nGdT]
*/ Y*\h?p[,
public void sort(int[] data) { 8IxIW0
MaxHeap h=new MaxHeap(); ~xsJML
h.init(data); "JLE
for(int i=0;i h.remove(); 3BD&;.<r
System.arraycopy(h.queue,1,data,0,data.length); [r3sk24
} Eri007?D
$%"hhju
private static class MaxHeap{ An0N'yo"Z
'\op$t/
void init(int[] data){ w2XHY>6];
this.queue=new int[data.length+1]; z[<Na3]
for(int i=0;i queue[++size]=data; Bt,'g*Cs
fixUp(size); s5mJ -
} RN[x\",
} lMu-,Z="
4K7ved)
private int size=0; FGyrDRDwC
p_&B+ <z
private int[] queue; x7<l*WQ
fKr_u<|
public int get() { }[UH1+`L
return queue[1]; pL;e(lM
} ~?fl8RF\
MD<x{7O12>
public void remove() { nw`rH*
SortUtil.swap(queue,1,size--); YsVKdh
fixDown(1); e Ru5/y~
} quaRVD>s +
file://fixdown '<<@@.(f
private void fixDown(int k) { {^N,$,Ab.
int j; O#18a,o@
while ((j = k << 1) <= size) { &g23tT#P?
if (j < size %26amp;%26amp; queue[j] j++; WoGnJ0N q
if (queue[k]>queue[j]) file://不用交换 ?6&G:Uz/
break; KGo^>us
SortUtil.swap(queue,j,k); 8,[ *BgeX
k = j; $b{8$<;9
} JU5,\3Lz#
} <X4f2z{T{@
private void fixUp(int k) { H!X*29nX
while (k > 1) { W5Pur lu?
int j = k >> 1; Te?PYV-
if (queue[j]>queue[k]) &-Wt!X 3
break; 8N9,HNBT$
SortUtil.swap(queue,j,k); mk!8>XvM
k = j; w42{)S"
} 0n`Temb/
} sH2xkUp
XP%_|Q2X
} 7_qsVhh]$E
|ZifrkD=
} =1R 2`H\
CL7/J[TS
SortUtil： ;y@zvec4
kJOZ;X=9/
package org.rut.util.algorithm; m,q)lbRl
}wvRs5;o
import org.rut.util.algorithm.support.BubbleSort; Z`GEF|eh
import org.rut.util.algorithm.support.HeapSort; bf2n%-&9g
import org.rut.util.algorithm.support.ImprovedMergeSort; n7Eh!<
import org.rut.util.algorithm.support.ImprovedQuickSort; MoEh25U.
import org.rut.util.algorithm.support.InsertSort; M.MQ?`_"b
import org.rut.util.algorithm.support.MergeSort; "a'I^B/
import org.rut.util.algorithm.support.QuickSort; N: 38N
import org.rut.util.algorithm.support.SelectionSort; $yj*n;
import org.rut.util.algorithm.support.ShellSort; 2 V\hG?<
>!" Sr3,L
/** Nv;'Ys P
* @author treeroot W1xPK*
* @since 2006-2-2 tK{#kApHGG
* @version 1.0 <zvtQ^{]
*/ _4SZ9yu
public class SortUtil { hslT49m>
public final static int INSERT = 1; lV4TFt,
public final static int BUBBLE = 2; 7SYe:^Dx
public final static int SELECTION = 3; d#bg(y\G|
public final static int SHELL = 4; %P<fz1
public final static int QUICK = 5; 7p':a)
public final static int IMPROVED_QUICK = 6; . a @7
public final static int MERGE = 7; mSu$1m8
public final static int IMPROVED_MERGE = 8; *& );-r`.
public final static int HEAP = 9; s}` |!Vyl
cyHbAtl
public static void sort(int[] data) { %Y'/_ esH2
sort(data, IMPROVED_QUICK); U*sQ5uq
} S\t!7Xs%*U
private static String[] name={ ebCS4&c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #EE<MKka
}; 'w72i/
1'TS!/ll];
private static Sort[] impl=new Sort[]{ tq'hiS(b
new InsertSort(), s%Ph
new BubbleSort(), jR\!2!
new SelectionSort(), 40].:9VG
new ShellSort(), T>#~.4A0
new QuickSort(), BOM0QskLf
new ImprovedQuickSort(), ,d_rK\J
new MergeSort(), N!dBF t"
new ImprovedMergeSort(), $qZ6i
new HeapSort() 9yTkZ`M28
}; =1|p$@L`%
55<!H-zt
public static String toString(int algorithm){ )*uotV
return name[algorithm-1]; ;WYzU`<g
} #sjGju"#_
BU>R<A5h
public static void sort(int[] data, int algorithm) { 4o@:+T:1
impl[algorithm-1].sort(data); 811QpYA
} 1?8M31
T9r6,yY
public static interface Sort { \?8q&o1=]
public void sort(int[] data); &;JeLL1J
} p^ROt'eQ<
!~'D;Jh
public static void swap(int[] data, int i, int j) { 5{1=BZftZ
int temp = data; Zn)o@'{}{
data = data[j]; -}oH],C
data[j] = temp; J n2QvUAZ&
} \' A- Lp
} j%]sym