[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; KK, t!a
} _o'a|=Osx>
int i1=l; g1&>.V}!
int i2=mid+1; pmgPBiU>
for(int cur=l;cur<=r;cur++){ ~UQXt r
if(i1==mid+1) a9g~(#?a
data[cur]=temp[i2++]; *1g3,NMA
else if(i2>r) xzz0uk5
data[cur]=temp[i1++]; XS=f>e1<W
else if(temp[i1] data[cur]=temp[i1++]; }0AoV&75
else @|EWif|
data[cur]=temp[i2++]; ^"] ]rZ)
} yyM`J7]J
} DLD5>
!Wz4BBU8o
} ErxvGB(2
EHk$,bM
改进后的归并排序: _@OS,A
KtD XB>
package org.rut.util.algorithm.support; Hb3t|<z
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import org.rut.util.algorithm.SortUtil; bkFO4OZd
N^f_hL|:9
/** r-$VPW
* @author treeroot q0L\{
* @since 2006-2-2 *>E_lWW.
* @version 1.0 {h0T_8L/
*/ d9q`IZqee
public class ImprovedMergeSort implements SortUtil.Sort { !nL>Ly
pch8A0JAl)
private static final int THRESHOLD = 10; !p!^[/9"c
rUh2[z8:
/* @K\hgaQ
* (non-Javadoc) W<>R;~)
* W0XfU`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W5Vh+'3
*/ (/KeGgkhv
public void sort(int[] data) { jbWgL$
int[] temp=new int[data.length]; HsKq/Oyk
mergeSort(data,temp,0,data.length-1); "xAIK
} \hI|I!sDWy
|J$Bj?
private void mergeSort(int[] data, int[] temp, int l, int r) { ?D;7ut$~
int i, j, k; I(>j"H)cAF
int mid = (l + r) / 2; m ;yIFO
if (l == r) 3v~[kVhoG
return; .S[M:<<*
if ((mid - l) >= THRESHOLD) zE+^WeH|
mergeSort(data, temp, l, mid); =rA]kGx
else [@Mo3]#\
insertSort(data, l, mid - l + 1); m>djoe
if ((r - mid) > THRESHOLD) rlY n"3%
mergeSort(data, temp, mid + 1, r); jEn9T
else $bl<mG%#9
insertSort(data, mid + 1, r - mid); -+[~eqRB
lC@wCgc
for (i = l; i <= mid; i++) { `*3;sq%`
temp = data; x27$h)R0v
} ;$3epP
for (j = 1; j <= r - mid; j++) { T_[
temp[r - j + 1] = data[j + mid]; NZz^*Ela
} Yf_/c*t\5
int a = temp[l]; -J>f,zA
int b = temp[r]; ~d-Q3n?zR
for (i = l, j = r, k = l; k <= r; k++) { + cZC$lo
if (a < b) { kgd dq
data[k] = temp[i++]; B]I*ymc#
a = temp; {t|Q9&
} else { =!u]t&yv
data[k] = temp[j--]; gts09{"}Y
b = temp[j]; hISYtNWjd"
} |E&|6h1
} v%7Gh-P
} W@RD bsc
Z-3("%_$/
/** +V;d^&S
* @param data dF7`V J2
* @param l W&HxMi
* @param i (_AU)
*/ T?CQgVR
private void insertSort(int[] data, int start, int len) { +wfZFJ:1l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A<IV"bo
} +mN8uU~(kx
} 9Zr6 KA{
} ;H9 W:_ahE
} |XmzqX%
-Gjz+cRns
堆排序： 4kR;K!@k
Q)\[wYMt
package org.rut.util.algorithm.support; h{ZK;(u$
r,q.RWuII
import org.rut.util.algorithm.SortUtil; %4})_h?j
KQ0f2?
/** udPLWrPF\
* @author treeroot pm2]
* @since 2006-2-2 f8-~&N/_R
* @version 1.0 ,6ae='=d
*/ Fb ~h{
public class HeapSort implements SortUtil.Sort{ 9{0%M
c3WF!~1r
/* (non-Javadoc) vhzz(UPUt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WBR# Ux
*/ G=l:v
public void sort(int[] data) { xl Q]"sm1
MaxHeap h=new MaxHeap(); SNf~%B?`L
h.init(data); &yI>A1
for(int i=0;i h.remove(); Oj8D+sC{
System.arraycopy(h.queue,1,data,0,data.length); $`P]%I}
} 3Xy~ap>Y
r@PVSH/
private static class MaxHeap{ ?;A\>sP
GK1P7Qy?V
void init(int[] data){ =i6k[rg
this.queue=new int[data.length+1]; Ym6v4k!@O
for(int i=0;i queue[++size]=data; _Td#C1g3
fixUp(size); pcQgWjfS
} ?Zb3M
} T8^l}Y B
ErFt5%FN.O
private int size=0; I8|"h8\
> w SI0N
private int[] queue; MRT<hB
]Bs{9=2
public int get() { FGeKhA 8jT
return queue[1]; aGAr24]y
} r.c:QY$
di7cCn
public void remove() { kOC0d,
SortUtil.swap(queue,1,size--); -j1]H"-
fixDown(1); *?A!`JpJn
} nZM]EWn
file://fixdown eI%kxqc
private void fixDown(int k) { &qM8)2Y
int j; (M{>9rk8
while ((j = k << 1) <= size) { . BX*C
if (j < size %26amp;%26amp; queue[j] j++; =E-o@#BS
if (queue[k]>queue[j]) file://不用交换 O\6gw$
break; 5BK3ix*L
SortUtil.swap(queue,j,k); Cxe(iwa.
k = j; 1$^r@rP
} /FjdcH=
} <9c{Kt.5(
private void fixUp(int k) { wk'&n^_br
while (k > 1) { d. ZfK
int j = k >> 1; L-zU%`1{M
if (queue[j]>queue[k]) 7Sh1QDYZ
break; tKds|0,j|
SortUtil.swap(queue,j,k); CWJN{
k = j; y qK*E*
} (W}DMcuSd
} /SyAjZ
G<]@nP{P
} 74&{GCL
"'/+}xM"5
} ;P$ _:-C
qn'TIE.
SortUtil： &VcO,7 A|
K /%5\h
package org.rut.util.algorithm; b$- g"F
b5ul|p
import org.rut.util.algorithm.support.BubbleSort; J*m7 d4^
import org.rut.util.algorithm.support.HeapSort; igEqty!.
import org.rut.util.algorithm.support.ImprovedMergeSort; 0uIBaW3s
import org.rut.util.algorithm.support.ImprovedQuickSort; ?mN!9/DIc
import org.rut.util.algorithm.support.InsertSort; yo%Nz"
import org.rut.util.algorithm.support.MergeSort; `?f<hIJoz
import org.rut.util.algorithm.support.QuickSort; M1T.
import org.rut.util.algorithm.support.SelectionSort; %a:T9v
import org.rut.util.algorithm.support.ShellSort; @VyNe(U
l}k'ZX4
/** Z,"YMUl'
* @author treeroot F?ps? e
* @since 2006-2-2 2fNNdxdbT
* @version 1.0 "xn,'`a
*/ I3}]MAE
public class SortUtil { B\qy:nr j
public final static int INSERT = 1; >/NegJh'F}
public final static int BUBBLE = 2; .~TI%&#
public final static int SELECTION = 3; KC%&or
public final static int SHELL = 4; CrG!8}
public final static int QUICK = 5; J25/Iy*byG
public final static int IMPROVED_QUICK = 6; *pABdP+
public final static int MERGE = 7; }J2f$l>R
public final static int IMPROVED_MERGE = 8; zMM~4?4
public final static int HEAP = 9; "KSdC8MS
[nlq(DGJhp
public static void sort(int[] data) { K<%8.mZ7
sort(data, IMPROVED_QUICK); p["pGsf
} xMa9o
private static String[] name={ .F[5{XV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t:v>W8N53
}; 2izBB,# "
M@p<L VP
private static Sort[] impl=new Sort[]{ <q Q@OUI
new InsertSort(), E>O@Bv
new BubbleSort(), de[NIDA;`
new SelectionSort(), +_QcLuV,
new ShellSort(), XQmg^x[,A
new QuickSort(), .[s6PzQy
new ImprovedQuickSort(), J HV
new MergeSort(), Q'?VLv|@
new ImprovedMergeSort(), $ f||!g
new HeapSort() -KfMKN~
}; woF{O)~X
)J2UNIgN
public static String toString(int algorithm){ ~=<uYv?0s
return name[algorithm-1]; " RIt
} !lA~;F
*y$CDv
public static void sort(int[] data, int algorithm) { %b~ND?nn-
impl[algorithm-1].sort(data); /zr)9LQY0
} _a_T`fE&de
NLUO{'uUW
public static interface Sort { t**d{P+
public void sort(int[] data); m9]Ge]
} B|{E[]iK
VW;E14
public static void swap(int[] data, int i, int j) { @W~aoq6
int temp = data; "9N;&^I
data = data[j]; gA3f@7}d
data[j] = temp; V 'fri/Z
} 8Z)wot
} ?crK613 t