[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`vse>,-hg
} Cf%)W:Q9
int i1=l; L(X:=) !K0
int i2=mid+1; s!UC{)g,
for(int cur=l;cur<=r;cur++){ dn5T7a~
if(i1==mid+1) /+66y=`UJ
data[cur]=temp[i2++]; /=-E`%R}!
else if(i2>r) Q2k\8i
data[cur]=temp[i1++]; 7GPBn}{W
else if(temp[i1] data[cur]=temp[i1++]; oTfEX4 t {
else qP]Gl--q{
data[cur]=temp[i2++]; K,^b=_]
} I@x*>
} xi|iV1A
E%$FX'8&
} '3<YZWS
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改进后的归并排序: |pJ.73
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package org.rut.util.algorithm.support; jPbL3"0A&
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import org.rut.util.algorithm.SortUtil; 5@Rf]'1B0
0ED(e1K#B
/** f#5mX&j
* @author treeroot sg9ZYWcL
* @since 2006-2-2 7Qq>?H -
* @version 1.0 ^ *m;![$[
*/ 8 A2k-X,
public class ImprovedMergeSort implements SortUtil.Sort { 6i&WF<%D
{zg}KiNDZd
private static final int THRESHOLD = 10; 7$b78wax
1L^\TC
/* v|n.AGn
* (non-Javadoc) &;C|=8eB
* WXGLo;+>I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eaCEZHr$
*/ T\2cAW5
public void sort(int[] data) { HW{+THNj
int[] temp=new int[data.length]; ==|//:: \
mergeSort(data,temp,0,data.length-1); o<%Sr*
} -vhgBru
!QC->
private void mergeSort(int[] data, int[] temp, int l, int r) { VE{t]>*-u
int i, j, k; ~9x$tb x-
int mid = (l + r) / 2; A"w 1GBx
if (l == r) QDSB <0j
return; 5w{_WR6,
if ((mid - l) >= THRESHOLD) E#ti
mergeSort(data, temp, l, mid); wn|Sdp
else _.\p^ HM
insertSort(data, l, mid - l + 1); G?YKm1:w
if ((r - mid) > THRESHOLD) "z7.i{
mergeSort(data, temp, mid + 1, r); O(wt[AEA
else _%"/I96'
insertSort(data, mid + 1, r - mid); t[0gN:s
l"O=xt`m{
for (i = l; i <= mid; i++) { &e2") 4oh
temp = data; OSsdB%bIu`
} opdi5e)jK
for (j = 1; j <= r - mid; j++) { 'rU5VrK
temp[r - j + 1] = data[j + mid]; Pm V:J9
} rN_\tulOF
int a = temp[l]; $40tAes9
int b = temp[r]; 5f}wQ
for (i = l, j = r, k = l; k <= r; k++) { M(SH3~
if (a < b) { <C]s\"o-`
data[k] = temp[i++]; bIwt#:v
a = temp; ,zz+s[ZH7O
} else { '6[0NuB
data[k] = temp[j--]; r1$ O<3\
b = temp[j]; !J'BAq[x
} XG_lyx%:E
} 6uR:/PTG
} q[7C,o>/
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/** dN;C-XF3s
* @param data 1;g>?18@
* @param l BWz*!(
* @param i -bcm"(<T'
*/ >*k3D&
private void insertSort(int[] data, int start, int len) { yv]/A<gP+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @ L?7`VoE
} 7$}lkL
} $)z(4Ev
} s#64NG
} beN0?G
!V#(g./W
堆排序： U")bvUIL
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package org.rut.util.algorithm.support; aJK8G,Vk
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import org.rut.util.algorithm.SortUtil; ')+'m1N
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/** O~l WFaW
* @author treeroot f*LDrAf9
* @since 2006-2-2 ,7z.%g3+z
* @version 1.0 bp;b;f>
*/ eBBqF!WDb
public class HeapSort implements SortUtil.Sort{ mp>,TOi~s7
qAHQZKk
/* (non-Javadoc) >t3%-Kc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0x[v)k9"0
*/ b&s"x? 7
public void sort(int[] data) { Wyw/imr
MaxHeap h=new MaxHeap(); D$!(Iae
h.init(data); \:%e 6M
for(int i=0;i h.remove(); " :@5|4qK
System.arraycopy(h.queue,1,data,0,data.length); $yLsuqB}
} cZPv6c_w
DXsp 2
private static class MaxHeap{ 349W0>eOT
#1&wfI$
void init(int[] data){ 2LEf"FH0~
this.queue=new int[data.length+1]; nsuK{8}@
for(int i=0;i queue[++size]=data; H Y\-sl^
fixUp(size); S:+SZq
} }p]8'($
} fiES6VL
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private int size=0; m\O<Yc keA
6;"jq92in*
private int[] queue; Qis[j-?:
"+~La{POc
public int get() { 9l+'V0?`
return queue[1]; B_aLqB]U
} dpxP
!Z3iu
public void remove() { Sbc
SortUtil.swap(queue,1,size--); /YKg.DA|
fixDown(1); [daUtKz
} q5p!Ty"
file://fixdown ,73J#
private void fixDown(int k) { pIXbr($
int j; ")q
while ((j = k << 1) <= size) { LK-2e$1
if (j < size %26amp;%26amp; queue[j] j++; )Gi!wm>zvN
if (queue[k]>queue[j]) file://不用交换 2g$PEwXe
break; 96fbMP+7R
SortUtil.swap(queue,j,k); 6F(;=iY8
k = j; ?suxoP%
} /5b,&
} :*4b,P
private void fixUp(int k) { k2(B{x}L
while (k > 1) { ;G|5kvE>
int j = k >> 1; ,qz$6oxh\
if (queue[j]>queue[k]) ,9SBGxK5`
break; w@ALl#z;}
SortUtil.swap(queue,j,k); 2? 9*V19yu
k = j; :D|"hJ
} p6VS<L
} IH(]RHTp%
P|`pJYe
} i|?EgGFG
?Imq4I~)
} dT?/9JIv
#;4<dDVy
SortUtil： j?<>y/IR
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package org.rut.util.algorithm; _Vul9=
2l^hnog|
import org.rut.util.algorithm.support.BubbleSort; YflM*F`
import org.rut.util.algorithm.support.HeapSort; `=TV4h4
import org.rut.util.algorithm.support.ImprovedMergeSort; rWsUWA T*
import org.rut.util.algorithm.support.ImprovedQuickSort; }22h)){n#Y
import org.rut.util.algorithm.support.InsertSort; oMey^]!
import org.rut.util.algorithm.support.MergeSort; :E`/z@I
import org.rut.util.algorithm.support.QuickSort; Y<0}z>^
import org.rut.util.algorithm.support.SelectionSort; .{r0Szm.
import org.rut.util.algorithm.support.ShellSort; }h{8i_R
4OX|pa
/** XLQt>y)
* @author treeroot L{PH8Xl_
* @since 2006-2-2 dA4DW
* @version 1.0 &gGh%:`B
*/ V&e9?5@
public class SortUtil { "L ,)4v/J
public final static int INSERT = 1; \;#T.@c5
public final static int BUBBLE = 2; F{,<6/ayRz
public final static int SELECTION = 3; )w/ #T
public final static int SHELL = 4; LKC^Y)6o
public final static int QUICK = 5; L F<{/c9,
public final static int IMPROVED_QUICK = 6; *BdKQ/Dk
public final static int MERGE = 7; gs/ i%O
public final static int IMPROVED_MERGE = 8; MuI>ZoNF
public final static int HEAP = 9; |-+IF,j
%)o'9
public static void sort(int[] data) { ;YGCsLT<xt
sort(data, IMPROVED_QUICK); };/;L[,G
} 1 >}x9D
private static String[] name={ +wPXDN#R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8_*31Y
}; r.z=
mc FSWmq
private static Sort[] impl=new Sort[]{ Gn?NY}.S
new InsertSort(), PoB-:G6
new BubbleSort(), 2wX4e0cOI4
new SelectionSort(), 2oBT _o%/J
new ShellSort(), v~.nP} E^
new QuickSort(), !vfbgK
new ImprovedQuickSort(), $:l>g)c
new MergeSort(), Acix`-<
new ImprovedMergeSort(), 1U?,}w
new HeapSort() S&JsDPzSd
}; #];b+ T
6,~Y(#
public static String toString(int algorithm){ fV(WUN+
return name[algorithm-1]; 3u,CI!
} aTWCX${~b
.D8|_B
public static void sort(int[] data, int algorithm) { >))f;$D=
impl[algorithm-1].sort(data); )hy(0 D
} '-KYeT\;
chC= $(5t
public static interface Sort { KkJrh@lk
public void sort(int[] data); ]_5qME#N
} Mil+> X0
je#OV,uHM
public static void swap(int[] data, int i, int j) { m%s&$
int temp = data; \#(tI3
data = data[j]; m+!T $$W
data[j] = temp; `k;MGs)&
} :3N&&]
} YQ-!>3/)-