[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; /nt%VLms%
} !HW?/-\,O
int i1=l; O-~cj7 0\
int i2=mid+1; !NKPy+v
for(int cur=l;cur<=r;cur++){ w2`JFxQ^x
if(i1==mid+1) 62[_u]<Yub
data[cur]=temp[i2++]; 6pZ/C<Y|W
else if(i2>r) 6$csFW3R
data[cur]=temp[i1++]; O\@0o|NM
else if(temp[i1] data[cur]=temp[i1++]; b=L|GV@$
else 'k<~HQr
data[cur]=temp[i2++]; Z%SDN"+'g
} ?fpI,WFu
} %T;VS-f
|+<o(Q(
} [W dxMU
k4^!"~<+0
改进后的归并排序: S6_dmTV*
1vqc8lC
package org.rut.util.algorithm.support; w'mn O'%
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import org.rut.util.algorithm.SortUtil; UVsF !0
fnFIw=d
/** Oek$f,J-
* @author treeroot `YBHBTG'o!
* @since 2006-2-2 -9s&OKo`({
* @version 1.0 H]M[2C7#N
*/ @ "CP@^
public class ImprovedMergeSort implements SortUtil.Sort { H^$7=
5<oV>|*@{
private static final int THRESHOLD = 10; Ik=bgEF
_w%{yF6
/* ,pdf$) XB
* (non-Javadoc) nEik;hAz
* f4|ir3oy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }|c-i.0=
*/ /BM{tH
public void sort(int[] data) { F/df!I~
int[] temp=new int[data.length]; o'YK\L!p
mergeSort(data,temp,0,data.length-1); quq!Jswn
} 1t#|MH ?U_
O tR
private void mergeSort(int[] data, int[] temp, int l, int r) { T{F 'Y%
int i, j, k; T@r%~z
int mid = (l + r) / 2; QKt{XB6Y
if (l == r) Y}r UVn
return; KM-7w66V
if ((mid - l) >= THRESHOLD) XIp>PcU^
mergeSort(data, temp, l, mid); pJ@->V_
else -TNb=2en(
insertSort(data, l, mid - l + 1); [>:9#n
if ((r - mid) > THRESHOLD) O[9A}g2~
mergeSort(data, temp, mid + 1, r); ,sp((SF]1
else qa?0GTAS
insertSort(data, mid + 1, r - mid); V24FzQ?z:.
f!cYLU1e@
for (i = l; i <= mid; i++) { <bh!wf6;
temp = data; :8lqo%5
} R^JtWjJR
for (j = 1; j <= r - mid; j++) { QY1|:(
temp[r - j + 1] = data[j + mid]; "^VPe[lA
} (<Kf
int a = temp[l]; q]P$NeEiZ"
int b = temp[r]; uCf _O~
for (i = l, j = r, k = l; k <= r; k++) { *p^*>~i9)
if (a < b) { QU)AgF[
data[k] = temp[i++]; $#J
a = temp; @$o^(my
} else { ygqWy1C
data[k] = temp[j--]; y,$zSPJCi
b = temp[j]; kfkcaj4l]
} z'k@$@:0XD
} 7KV0g1GQ
} VyOpPIP
6"GHVFB
/** tI+P&L"
* @param data I@I-QiI
* @param l -1]8f
* @param i U#(#U0s*-
*/ %I%OHs
private void insertSort(int[] data, int start, int len) { ~J|B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [CG*o>n&|
} "pQ)5/e
} F{ sPQf'
} dpB\=
} b3+F~G-I"
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堆排序： PO]c&}/
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package org.rut.util.algorithm.support; *|3G"B{w6
w(!COu
import org.rut.util.algorithm.SortUtil; *o#P)H
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/** |OO2>(Fj
* @author treeroot -AM(-
* @since 2006-2-2 VNxhv!w
* @version 1.0 Y i`wj^
*/ aHSl_[
public class HeapSort implements SortUtil.Sort{ *nV*WUS3
$ I|K<slV
/* (non-Javadoc) Y|F~w~Cb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y86mg7[U/
*/ /"7_75 t
public void sort(int[] data) { G`FY[^:
MaxHeap h=new MaxHeap(); 4So ,m0v
h.init(data); je5GZFQw
for(int i=0;i h.remove(); ^:^8M4:
System.arraycopy(h.queue,1,data,0,data.length); :<R"Kk@
} ]+@I]\S4
$/$ 5{<
private static class MaxHeap{ ^<+V[=X
hta y-
void init(int[] data){ {3|h^h_R
this.queue=new int[data.length+1]; T9-2"M=|<
for(int i=0;i queue[++size]=data; WXJ%hA
fixUp(size); ,qK3 3Bn
} Qjd<%!]+\
} /fC8jdp&
kZ<"hsh,Y'
private int size=0; v|;}}ol
g I@I.=y
private int[] queue; 1\%2@NR
Kb*X2#;*
public int get() { eBg:[44V
return queue[1]; 71OQ?fc
} XjU/7Q
^,6c9Dxy
public void remove() { j@Y'>3
SortUtil.swap(queue,1,size--); CP6xyXOlPB
fixDown(1); yFjjpEpnFt
} "D7wtpJ
file://fixdown 50NLguE
private void fixDown(int k) { #A9rI;"XI
int j; oO&R3zA1d
while ((j = k << 1) <= size) { *QP+p,L*
if (j < size %26amp;%26amp; queue[j] j++; jLF,R7t
if (queue[k]>queue[j]) file://不用交换 mD go@f
break; N:&EFfg3
SortUtil.swap(queue,j,k); >\ x!a:}
k = j; a0 8Wt
} ! ^TCe8
} tY!GJusd
private void fixUp(int k) { bTW# f$q:4
while (k > 1) { RKO} W#?
int j = k >> 1; _REAzxeS
if (queue[j]>queue[k]) l1ViUY&Z
break; Z:Y_{YAD
SortUtil.swap(queue,j,k); }MW+K&sIh
k = j; xw~3x*{
} GfL:0
} .[C@p`DZ
NRDXWscb
} -~WDv[[
o ^Ro 54i
} ,^uQw/
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SortUtil： wlw`%z-B2
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package org.rut.util.algorithm; _j}jh[M
rqz`F\A;%
import org.rut.util.algorithm.support.BubbleSort; n1;zml:7_
import org.rut.util.algorithm.support.HeapSort; ) S,f I
import org.rut.util.algorithm.support.ImprovedMergeSort; I7Xm~w!{qk
import org.rut.util.algorithm.support.ImprovedQuickSort; =RjseTS
import org.rut.util.algorithm.support.InsertSort; K%WG[p\Eu
import org.rut.util.algorithm.support.MergeSort; Q ?R3aJ
import org.rut.util.algorithm.support.QuickSort; 0vrx5E!
import org.rut.util.algorithm.support.SelectionSort; v&8s>~i`K
import org.rut.util.algorithm.support.ShellSort; V&Q_iE
vhKHiw9L
/** cE+Y#jB
* @author treeroot IT:8k5(L5j
* @since 2006-2-2 r!y3VmJ'm
* @version 1.0 <7Ry"z6g;
*/ B2l5}"{`
public class SortUtil { W*^_Ul|
public final static int INSERT = 1; o3(:R0
public final static int BUBBLE = 2; JXF0}T)C
public final static int SELECTION = 3; !YENJJ
public final static int SHELL = 4; cN%@ nW0i
public final static int QUICK = 5; KK, t!a
public final static int IMPROVED_QUICK = 6; _o'a|=Osx>
public final static int MERGE = 7; g1&>.V}!
public final static int IMPROVED_MERGE = 8; \x<i6&.
public final static int HEAP = 9; T*jQzcm~?
6}>CPi#
public static void sort(int[] data) { i>%A0.9
sort(data, IMPROVED_QUICK); (DY&{vudF
} ]\(Ho
private static String[] name={ \/F*JPhy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AfvIzsT0
}; L*(`ccU
G|.6%-
private static Sort[] impl=new Sort[]{ #&K?N
new InsertSort(), Ox9M![fC
new BubbleSort(), UOn:@Qn
new SelectionSort(), e3,@prr
new ShellSort(), `CY c>n"
new QuickSort(), WYd9p;k
new ImprovedQuickSort(), r2T$ ;m.
new MergeSort(), vq:?a
new ImprovedMergeSort(), W?<<al*
new HeapSort() -1}&\=8M
}; +,T z +!
QzVoU |
public static String toString(int algorithm){ 9Xh1i`.D
return name[algorithm-1]; ;*njS1@
} uP$C2glyz
aW_Pv~
public static void sort(int[] data, int algorithm) { /z`.-D(
impl[algorithm-1].sort(data); |o<c`:;kt
} sQBKzvFO3
Q PrP3DK
public static interface Sort { I+W:}}"j
public void sort(int[] data); 6o&ZS @
} `APeS=< &
G.]'pn
public static void swap(int[] data, int i, int j) { !3`X Gg
int temp = data; jx14/E+^
data = data[j]; qi$nG_<<Z
data[j] = temp; {'sp8:$a
} %\T#Ik~3
} m\G45%m